User Manual 1760 Series Component Waveform/ Vector Monitor 070-8473-05 This document supports firmware version 2.2 and above. www.tektronix.
Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injury Use Proper Power Cord Use only the power cord specified for this product and certified for the country of use.
General Safety Summary The common terminal is at ground potential. Do not connect the common terminal to elevated voltages. Do Not Operate Without Covers. Do not operate this product with covers or panels removed. Use Proper Fuse. Use only the fuse type and rating specified for this product. Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present. Do Not Operate With Suspected Failures.
General Safety Summary CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking. WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. Symbols on the Product.
General Safety Summary iv 1760 Series Component Waveform/Vector Monitor User Manual
TABLE OF CONTENTS Introduction Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Option SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Cord Options . . . . . . . . . . . . . . . . . . . . . . . CRT Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Getting Started At A Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Front-Panel Controls . . . . . . . . . . . . . . . . . . . . . . Rear-Panel Connectors . . . . . . . . . . . . . . . . . . . . 2-1 2-8 Operator’s Checkout Procedure . . . . . . . . . . . . . . . . . Required Equipment . . . . . . . . . . . . . . . . . . . . Initial Equipment Connections . . . . . . . . . . . . Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Filter Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cursor Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Waveform Cursor Control . . . . . . . . . . . . . . . . Vector + Waveform (Multiple) . . . . . . . . . . . . Using the Cursors . . . . . . . . . . . . . . . . . . . . . . . . . Line Select Menu . . . . . . . . . . . . . . . . . . . . . . . . . Preset Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configure Menu . . . . . . . . . .
Table of Contents Chroma Bandwidth . . . . . . . . . . . . . . . . . . . . . Differential Phase and Gain . . . . . . . . . . . . . . Making SCH Phase Measurements . . . . . . . . . NTSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCH R---Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Making Audio Measurements . . . . . . . . . . . . . . . Lightning Measurements . . . . . . . . . . . . . . . . . . .
LIST OF FIGURES Figure 2-1 Figure 2-2 Figure 2-3 Figure 2-4 Figure 2-5 Figure 2-6 Figure 2-7 Figure 2-8 Figure 2-9 Figure 2-10 Figure 2-11 Figure 2-12 Figure 2-13 Figure 2-14 Figure 2-15 Figure 2-16 Figure 2-17 Figure 2-18 Figure 2-19 Figure 2-20 Figure 2-21 Figure 3-1 Figure 3-2 Figure 3-3 Figure 3-4 Figure 3-5 Figure 3-6 Multi-Use Bezel Controls and Buttons. . . . . . . 1760 Front Panel . . . . . . . . . . . . . . . . . . . . . 1760-- Series Rear Panel . . . . . . . . . . . . . . . .
Figure 4-1 Figure 4-2 Figure 4-3 Figure 4-4 Figure 4-5 Figure 4-6 Figure 4-7 Figure 4-8 Figure 4-9 Figure 4-10 Figure 4-11 Figure 4-12 Figure 4-13 Figure 4-14 Figure 4-15 Figure 4-16 Figure 4-17 Figure B-1 Figure B-2 x NTSC waveform/vector graticule . . . . . . . . . . PAL waveform/vector graticule . . . . . . . . . . . . Dual Standard waveform/vector graticule . . . . Vector targets . . . . . . . . . . . . . . . . . . . . . . . . Differential gain and phase measurements . . . NTSC dual-dot SCH display .
Preface This user manual is one of a set of two manuals that document the Tektronix 1760-Series Component Waveform/Vector monitors. To purchase a service manual, please refer to “Contacting Tektronix” on Page xiv for address and phone number information. User Manual Instrument controls and readouts appear in ALL CAPITALS.
Preface Service Manual Topics covered in the service manual are as follows: Specifications Operating Information Theory of Operation Performance Verification Adjustment Procedures Maintenance Options Electrical Parts List Diagrams Mechanical Parts List xii 1760 Series Component Waveform/Vector Monitor User Manual
Preface 1761 Component Waveform / Vector Monitor.
Preface Contacting Tektronix Phone 1-800-833-9200* Address Tektronix, Inc. Department or name (if known) 14200 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA Web site www.tektronix.com Sales support 1-800-833-9200, select option 1* Service support 1-800-833-9200, select option 2* Technical support Email: techsupport@tektronix.com 1-800-833-9200, select option 3* 6:00 a.m. - 5:00 p.m. Pacific time * xiv This phone number is toll free in North America.
Introduction
Product Description The 1760-- Series Component Waveform/Vector monitors display component signal channels two ways: in parade and overlay modes and as component color vectors. A component picture monitor output is provided for display on an RGB monitor. The 1760-- Series monitors feature the Tektronix Lighting display. This display indicates everything needed to adjust setup, video gain, chroma gain, and interchannel timing for standardized playback of component video recordings.
Product Description Features H Component and composite waveform monitoring. H Lightning display. H Composite vector display. H Menu-assisted operation allows more features. H Assignable cursors for time and voltage. H Picture monitor mode for verifying signal source. H Stereo audio display. H Longitudinal time code display mode for editing applications. H SCH and color framing display (Option SC only). H External staircase from a camera control unit can be selected remotely.
Product Description erator selects a menu item, such as VOLTAGE/TIMING CURSORS, VARIABLE GAIN, or LINE SELECT, an on-screen label shows the current function of the controls. Instrument configurations such as dc restorer speed and clamp timing are made through an on-screen menu in the 1760-- Series. The FILTER menu also provides a choice of four filters in addition to flat. CRT The monitors have a bright, post-accelerated CRT with lighted internal graticule.
Product Description 1-4 1760 Series Component Waveform/Vector Monitor User Manual
Options Options available for the 1760-- Series include SCH phase measurement, white phosphor CRT and power cord options. Field upgrade kits listed in this section can also be used with these monitors. Option SC The 1760-- Series can be ordered with Option SC. This provides a vector display of the subcarrier-to-horizontal-sync phase relationship. It includes the same SCH capabilities as the 1750A-- Series instruments.
Options Option A4. Power, North America, 250V/10 A (Power Cord) Option A5. Power, Swiss, 240 V/6 A (Power Cord) CRT Options The standard instrument is shipped with a P31 (green) phosphor CRT installed. If Option 74 is ordered, the instrument is shipped with a P4 (white) phosphor CRT installed.
Accessories Standard Accessories These accessories are included with the product: 1 Manual, user: 1760-- Series (070-- 8473-- XX) 1 Cable assembly, power: United States and Japan only (161-- 0216-- XX) 1 Cable assembly, power: all other countries (161-- 0066-- XX) 1 Fuse, cartridge: 3AG, 2A, 250V, fast-blow (159-- 0021-- 00) 4 Light bulbs: graticule scale (150-- 0168-- 00). See page C-1 for replacement instructions. 4 Air filters: fan (378-- 0335-- 00). See page C-1 for replacement instructions.
Accessories Field Upgrade Kits 1700F00 Plain Cabinet — This plain metal half-rack size cabinet is painted silver-gray. Ventilating holes in top, bottom, and sides of the cabinet allow heat generated within the instrument to dissipate. 1700F02 Carrying Case — This portable cabinet is similar to the 1700F00, but has feet, carrying handle, flipstand, and front cover. 1700F05 Side-by-Side Rack Adapter — The 1700F05 allows the user to mount two half-rack width instruments in a standard 19-- inch rack.
Installation Unpacking Save the shipping carton and packing materials (including anti-static bag) in case it becomes necessary to ship the instrument to a Tektronix Service Center for service or repair. Accessories Check that the following accessory items are included: H User Manual H Service Manual Note: The Service Manual is an optional accessory that must be ordered to be received.
Installation 2. 3. Package the instrument in the original packaging materials. If the original packaging materials are not available, follow these directions: a. Obtain a carton of corrugated cardboard having inside dimensions six or more inches greater than the dimensions of the instrument. Use a shipping carton that has a test strength of at least 275 pounds. b. Surround the instrument with a protective bag (anti-static preferred).
Installation WARNING When power is supplied, line voltage will be present in the instrument, even if the POWER switch is set to STANDBY. Mains Frequency and Voltage Range The 1760-- Series monitors operate at 50 and 60 Hz, over the range of 90-- 250 Volts, without operator adjustment. Remote Connector The rear-panel REMOTE connector is a 25-pin, D-type connector. It provides the input for RGB/YRGB staircase, external horizontal, and remote sync.
Installation Mechanical Installation All qualification testing was performed with a Tektronix 1700F00 cabinet installed. To guarantee compliance with specifications, operate the instrument in a cabinet or rackmount adapter. The Tektronix 1700F00, 1700F02, and 1700F05 provide the proper electrical environment, supply adequate shielding, minimize handling damage, and reduce dust collection within the instrument.
Installation Rackmounting The 1760-- Series monitors are half-rack width and three rack units high. They require approximately three inches of rear clearance for power cord and cable connections, and 20 inches in front of a rack for installation and removal of the instrument. The optional 1700F05 rack adapter allows two Tektronix half-rack instruments to be mounted side-by-side in a rack.
Installation 1-14 1760 Series Component Waveform/Vector Monitor User Manual
Instrument Configuration Focus, scale illumination, signal intensity, readout intensity, and trace rotation are set through the CRT menu. Several instrument operating parameters can be set through the CONFIG menu. Instructions for using these menus begin on page 3-20.
Instrument Configuration 1-16 1760 Series Component Waveform/Vector Monitor User Manual
Getting Started
At A Glance Front-Panel Controls This overview of front-panel controls refers to Figure 2-2. Controls---Switches---LEDs H All front-panel controls are the continuous action type, and all front-panel buttons are push and release toggle switches. H Green LEDs light to indicate the current switch selection. POWER H ON/STANDBY turns the instrument on or to standby status. An LED indicates when power is on.
At A Glance H Depress and hold the CLEAR MENU and WAVEFORM buttons while you turn instrument power on again. Hold both buttons in until the instrument returns to its normal operating state. H If this reset does not unlock the controls, contact your Tektronix field office or call Tektronix at the phone number listed in the front of this manual. Multi-use Controls H The center three controls located under the CRT have functions assigned and labeled through the onscreen menus and readouts.
VERT POS HORIZ POS CLEAR MENU OVERLAY PARADE A 123 B 123 CH-B3 CH-A3 CH-B2 CH-A2 CH-B1 CH-A1 EXT REF RESTORE DC REST MAG FIELD 1760 Series Component Waveform/Vector Monitor User Manual ON/ STANDBY POWER CRT GAIN CONFIG PRESET LIN SEL CURSOR FILTER MENU SWEEP LINE TIME CODE PICTURE LIGHTNING INPUT CH-A CH-B AUDIO BOWTIE WAVEFORM SCH MULTIPLE DISPLAY WAVEFORM / VECTOR MONITOR VECTOR 1760 At A Glance Figure 2-2. 1760 Front Panel.
At A Glance POSITION H VERT POS allows the signal display to be moved vertically. Offsets for channels A2/A3 and B2/B3 are enabled through the CONFIGURE menu. H HORIZ POS allows the signal display to be moved horizontally. DISPLAY H WAVEFORM provides voltage vs. time display of the video signal. H VECTOR presents an XY plot of demodulated chrominance phase and amplitude.
At A Glance H TIME CODE provides monitoring of longitudinal time code in a frame-rate display. H MULTIPLE allows simultaneous selection of WAVEFORM and VECTOR DISPLAY modes. SWEEP Sweep buttons are used to select the waveform sweep rate. H LINE/FIELD toggles through four sweep rate selec- tions: one line, two line, one field, and two field. Two line and two field selections not available with PARADE or A123 or B123 display. H MAG turns on the sweep magnifier. See page 3-6.
At A Glance H Without PARADE or OVERLAY selected, only one input selection can be made at a time. Each input channel button (including A123 / B123) toggles between A and B, and is cancelled when another input button is pressed. H With PARADE or OVERLAY selected, multiple input selections can be made; input buttons select A, B, both, or off, and do not cancel each other.
At A Glance H PRESET allows the user to store and recall up to 9 front-panel setups. One additional recall is factory pre-programmed. Presets one through eight can also be accessed remotely. H CONFIG allows the user to configure several operat- ing parameters, such as input coupling, dc restorer speed, and internal reference designation. H GAIN provides selection of X1, X5, X10, and variable gain. H CRT menu allows adjustment of CRT focus, signal intensity, and trace rotation.
At A Glance Rear-Panel Connectors The following is an overview of rear-panel connectors. Figure 2-3 shows the 1760-- Series rear panel. Loop-Through Inputs H H INPUTS A, A1, A2, A3, B, B1, B2, and B3 are passive loop-through video inputs, compensated for 75 Ω. The front-panel INPUT switch settings determine which channel(s) are displayed. Inputs 1, 2, and 3 are designed for component signals. All inputs can be used with composite signals.
At A Glance Fuse H The instrument’s mains fuse should be replaced only with a 250V, 2A, F-type cartridge fuse. A replacement fuse is included with the instrument. AC Power H The AC POWER plug is a standard ac plug receptacle for 120 or 240 Vac power mains. The plug is compatible with any of the power cord options available with the 1760-- Series. The monitors operate at 50 and 60 Hz, over the range of 90-- 250 Volts, without operator adjustment.
2-10 110 VA MAX 90 --- 250V 50/60 HZ REPLACE FUSE WITH 250V 2A F TYPE R G B 5 9 RS232 6 1 TO AVOID ELECTRICAL SHOCK, THE POWER CORD PROTECTIVE GROUNDING CONDUCTOR MUST BE CONNECTED TO EARTH GROUND. WARNING EXT REF PIX OUT 13 25 B3 A3 REMOTE B2 A2 ! 14 1 B1 A1 75 OHM LOOP--THROUGH COMPENSATED B A DIE IN DIESEM GERAT ENTSTEHENDE ROHTGENSTRAHLUNG IST AUSREICHEND ABGESCHIRMT. BESCHLEUNIGUNGSPANNUNG KLEINER ALS 20KV. At A Glance Figure 2-3. 1760---Series Rear Panel.
Operator’s Checkout Procedure Before proceeding, read At A Glance starting on page 2-1. This procedure is designed for operator familiarization and for checking basic instrument operation (not measurement quantities or specifications). All illustrations are of the 1765 unless otherwise noted. If performing this procedure reveals improper instrument operation, first check the operation of the associated equipment.
Operator’s Checkout Procedure Initial Equipment Connections H Connect the 1760-- Series to an appropriate AC power source. H Connect the generator NTSC output (COMPOSITE for TSG131) to the CH-A input. Connect the CH-A loopthrough to the EXT REF input and connect a 75Ω terminator to the EXT REF loop-through. See Figure 2-4. H Connect the generator Y output to the CH-A1 input. Connect B-- Y to CH-A2 and R-- Y to CH-A3. Connect a 75Ω terminator to each loop-through.
Operator’s Checkout Procedure Procedure 1. Initialize the Front-Panel Controls Enter the PRESET menu and select FACTORY. Press the bezel button corresponding to RECALL. The front-panel controls are now set to the factory preset (described on page 3-18), and the PRESET menu is automatically exited. Notice that the instrument is in the WAVEFORM display mode with the CH-A INPUT displayed in two-line sweep. 2. Adjust the Display Use the VERT POS and HORIZ POS controls to center the display. Enter the CRT menu.
Operator’s Checkout Procedure Figure 2-5. Component waveform display (A123). Press the PARADE/OVERLAY button. The PARADE indicator lights, and the inputs previously selected for parade are restored (in this case, CH-A1, CH-A2, and CH-A3 from the factory preset). During PARADE (or OVERLAY) operation, all input channel buttons (including A123/B123) sequence through A, B, both, and off. Press the CH-A3/CH-B3 input repeatedly until it sequences through B, both, off, and back to A (CH-A3 selected).
Operator’s Checkout Procedure 4. Check Gain The 1760-- Series internal calibrator can be used to check instrument calibration. Select CH-A input and set the generator for NTSC Color Bars output (COMPOSITE for PAL). Enter the configuration menu and select CALIBRATE. Turn on the calibrator signal and note that the amplitude is 140 IRE (1.0 V PAL), with one cycle per division. See Figure 2-6. Select VECTOR display mode. Note that the calibrator signal overlays the compass rose.
Operator’s Checkout Procedure 5. Gain Control There are three calibrated vertical gain settings available (X1, X5, and X10), as well as an independent variable gain control. Enter the GAIN menu and select X5. Note that X5 is outlined and the display is amplified. Select X10. Note that X10 is outlined and the display is amplified again. Select variable gain and use the right bezel control to adjust the gain to the minimum and maximum settings. Exit the GAIN menu, then enter it again.
Operator’s Checkout Procedure Select timing cursors (TIME). The timing cursors appear as two vertical dashed lines: cursor 1 has single dashes and cursor 2 has double dashes. The time difference between them is displayed as ∆T. Select voltage and timing cursors together (V+T). Note that when CONTROL is set to TIME, the three bezel controls adjust timing cursors; when set to VOLT, they adjust voltage cursors. Select markers (MARK).
Operator’s Checkout Procedure 8. Filter Selection The 1760-- Series offers several filter selections for the waveform display. Ensure that the instrument is operating in waveform mode. Enter the FILTER menu (FLAT is selected by the factory preset). Select LUM filter. This provides a low-pass-filtered display of the luminance portion of the signal. See Figure 2-7. 10 S/DIV FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C Figure 2-7. Two-Line LUM filter display of color bar signal. Select CHROM.
Operator’s Checkout Procedure 10 S/DIV FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C Figure 2-8. Two-Line CHROM filter display of color bar signal. Select F+L+C (FLAT plus LUM plus CHROM). The display is similar to the F+L display, with the chrominance-filtered signal added on the right. Select DIFF. Select the generator 5-step staircase signal. The differentiated-step filtered display appears similar to Figure 2-9. Select R---Y. This provides a demodulated chrominance-vs.time display.
Operator’s Checkout Procedure 10 S/DIV FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C Figure 2-9. Two-Line DIFF filter display of 5-step staircase signal. FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C VECTOR PHASE Figure 2-10. Two-Line R ---Y display of color bar signal.
Operator’s Checkout Procedure FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C VECTOR PHASE Figure 2-11. Two-Field SCH R ---Y display (NTSC), showing proper SCH phase. FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C VECTOR PHASE Figure 2-12. Two-Field SCH R ---Y display (PAL), showing proper SCH phase.
Operator’s Checkout Procedure 9. Line Selection Line select is available in WAVEFORM, VECTOR, SCH, and PICTURE display modes. Enter the LINE SELECT menu and turn the center bezel control until the readout displays ALL 131. In a two line display, line 131 appears on the left, followed by line 132. Select 2 FIELD sweep and note the intensified line in each field. Select 15H and note that 15 lines are now intensified in each field (intensified portion appears wider). The readout is now ALL 131-- -- 145.
Operator’s Checkout Procedure 10. Vectorscope Display Select VECTOR display mode. Adjust the right bezel control to place the burst vector on the 180° graticule line. The display should appear similar to Figure 2-14. 11. Picture Monitor Display Select PICTURE display mode. A picture monitor display of the selected input signal appears. This can be used to visually identify the signal source. See Figure 2-15. 12.
Operator’s Checkout Procedure Figure 2-15. Picture mode display of color bar signal. Figure 2-16. Audio display with phase error.
Operator’s Checkout Procedure 13. SCH Display (Option SC Only) The SCH display mode provides a vector display of the subcarrier-to-horizontal-sync phase relationship. (SCH measurements appear on page 4-10.) For NTSC operation, verify that REF is set to internal, then select SCH display mode. This provides a dual-dot display, as shown in Figure 2-17. Select EXT REF. This provides the single-dot display, shown in Figure 2-18. For PAL operation, the REF selection does not affect the display.
Operator’s Checkout Procedure VECTOR PHASE Figure 2-18. PAL SCH display. 14. Lightning Display For a Lightning display, select the Y, B-- Y, R-- Y format on the signal generator. Enter the CONFIG menu and select FORMAT. Select the proper format for your signal source (GBR, SMPTE/EBU, BETA or MII). Under DISPLAY, select LIGHTNING. Leave the configuration menu selected. Select LIGHTNING display mode. The display should be similar to Figure 2-19. Under DISPLAY, select DIAMOND.
Operator’s Checkout Procedure Y L DISPLAY LIGHTNING DIAMOND C G M R INPUT VECTOR B 525/60 GBR SMPTE/EBU R BETA MII M B FORMAT G STANDARD C OFFSET CALIBRATE Y L 625/50 GBR SMPTE/EBU BETA MII REMOTE REFERENCE Figure 2-19. Lightning Display in MII Format. DISPLAY LIGHTNING DIAMOND G B INPUT VECTOR G FORMAT STANDARD OFFSET CALIBRATE REMOTE REFERENCE 525/60 GBR SMPTE/EBU BETA MII R 625/50 GBR SMPTE/EBU BETA MII Figure 2-20. Diamond display, showing signal within gamut limit.
Operator’s Checkout Procedure 15. Bowtie Display For a Bowtie display, select the Channel Timing signal from the generator. Select BOWTIE display mode on the 1760-- Series. The display should appear similar to Figure 2-21. Information on making measurements with the Bowtie display appears on page 4-21. Figure 2-21. Bowtie display. This concludes the Operator’s Checkout Procedure.
Operation Basics
Functional Overview The Functional Overview describes instrument functions in greater detail than At A Glance. For menu operation, refer to page 3-7. Detailed Measurement procedures are given in Basic Measurements, beginning on page 4-1.
Functional Overview SCH (Option SC Only) SCH provides a vector display of the subcarrier-to-horizontalsync phase relationship. The burst vector and the phase of the 50% point of the leading edge of sync are displayed. Subcarrier-to-horizontal phase and color framing are displayed graphically in the polar SCH display. Sync jitter over the field is displayed as a moving sync vector dot.
Functional Overview Lightning The front-panel LIGHTNING button is used for both the Lightning display and the Diamond display. For Lightning display, use the CONFIG—FORMAT menu (page 3-21) to set the DISPLAY to LIGHTNING and select the appropriate format for your system. Push CLEAR MENU to clear the menu readout. Selecting Lightning mode forces the instrument to A123 input display; it can be changed to B123.
Functional Overview Bowtie In BOWTIE mode, the display is forced to a two line or field sweep and A123 input is selected. The left half of the display shows CH-1 minus CH-2 and the right half shows CH-1 minus CH-3. If the timing between channels is matched, the centers of the bowties will be centered and not skewed. If CH-2 is delayed with respect to CH-1, the skew moves to the right. If CH-2 is advanced with respect to CH-1, the skew moves to the left.
Functional Overview Displaying a Signal Inputs There are eight rear-panel loop-through inputs, which may eliminate the need for an external routing switcher. The inputs can be displayed singly or in combination. Without PARADE or OVERLAY selected, only one input selection can be made at a time. Each input channel button (including A123 / B123) toggles between A and B, and is cancelled when another input button is pressed. With PARADE or OVERLAY selected, the input channels can be displayed in combination.
Functional Overview Overlay OVERLAY superimposes the selected input signals. In OVERLAY mode, the LINE/FIELD button remains a four-way toggle, providing one line, two line, one field, and two field displays. Sweep Sweep buttons are used to select the waveform sweep rate. LINE/FIELD toggles through four sweep rate selections: one line, two line, one field, and two field. In PARADE mode, the LINE/FIELD button becomes a two-way switch, toggling between line and field.
Using the Menus General menu information here is followed by detailed information about each menu: FILTER, CURSOR, LIN SEL, PRESET, CONFIG, GAIN and CRT. To set instrument operating parameters, see CONFIG and CRT menu information. General Menu Information Push the desired menu button to obtain an on-screen menu readout. Multi-Use Bezel Controls and Buttons Menu selections appear along the right side of the screen. Descriptive labels, when present, appear in ITALIC text.
Using the Menus Clear Menu Push CLEAR MENU to clear part of the menu display, but leave essential readout elements such as control assignments and measurement readouts. (The menu LED remains lighted to show this state.) Push the menu button to bring back the full display. CRT, PRESET, and CONFIG menus will be exited completely when CLEAR MENU is pushed. Exiting a Menu Function To exit a menu function while its display is present, push that menu button.
Using the Menus Filter Menu The FILTER menu is available for WAVEFORM mode only. Note that the instrument must be in WAVEFORM mode to access the R-- Y displays. When the FILTER button is pushed in WAVEFORM mode, an on-screen menu allows the following selections. The bezel buttons are self-cancelling. H FLAT — provides flat (normal) response. H LUM — provides a low-pass response to display the luminance portion of the composite video signal.
Using the Menus Cursor Menu Press the CURSOR menu button to enter the cursor menu. Cursors are available in composite and component operation for VECTOR, WAVEFORM, and VECT+WFM DISPLAY modes. Vector Cursor Control In VECTOR display mode, a bezel button is used to select polar cursors (POLAR) or markers (MARK). The polar cursor appears as crosshairs, as shown in Figure 3-2. The left bezel control is used to adjust cursor amplitude, and the center control adjusts cursor phase.
Using the Menus Waveform Cursor Control In WAVEFORM display mode, the bezel buttons are used to select timing cursors (TIME), voltage cursors (VOLT), both voltage and timing (V+T), or markers (MARK). The Waveform cursor menu is shown in Figure 3-3. H When voltage cursors are selected (VOLT), the left bezel control is used to adjust the vertical position of the first voltage cursor, and the center bezel control adjusts the second voltage cursor.
Using the Menus ∆V 700 mV WFM CURSOR VOLT TIME MARK V+T VOLT1 VOLT2 TRACK VERTPOS HORIZPOS CLEAR MENU Left Center Right Figure 3-3. The WAVEFORM CURSOR menu. Voltage Cursor 1 ∆V 700 mV WFM CURSOR VOLT TIME MARK Voltage Cursor 2 V+T VEC CURSOR POLAR MARK Timing Cursor 1 Timing Cursor 2 VOLT1 VERTPOS VOLT2 TRACK CONTROL VOLT TIME HORIZPOS CLEAR MENU Figure 3-4. The VECTOR+WFM CURSOR menu with V+T selected.
Using the Menus Vector + Waveform (Multiple) If MULTIPLE is pressed and both VECTOR and WAVEFORM displays are selected, menus for all cursor types will be displayed. See Figure 3-4. All cursor functions are available in this mode (the top three bezel buttons are self-cancelling). Bezel control assignments are the same as for the individual modes. Using the Cursors With Vector Display To use vector cursors, operate in VECTOR or VECTOR+WAVEFORM mode and press the CURSOR MENU button.
Using the Menus When the gain or position of the signal is changed, the polar cursors maintain their relationship with the signal. When CLEAR MENU is pressed, the POLAR / MARK choice on the right side of the screen will be removed, but the bezel controls will still be active and cursor measurements can still be made. When another menu is selected, the bezel controls may be reassigned to the new menu, but will return to cursor control when the new menu is deselected.
Using the Menus With Waveform Display Voltage Cursors can be used to make accurate signal amplitude measurements. With VOLT selected, use the left bezel control to position the VOLT1 cursor at the upper excursion of signal to be measured, and the center bezel control to position the VOLT2 cursor at the lower excursion. The on-screen readout gives the voltage difference between the two levels. When GAIN is changed, the voltage cursors maintain their relationship with the signal.
Using the Menus Line Select Menu Pushing the LIN SEL menu button enables the line select mode and provides a menu display. The center bezel control is assigned to select the line number. The following choices can be made using the bezel buttons that correspond to the on-screen labels: 1760-- Series H 1H or 15H (one line or 15 lines) H FIELD H NEXT FIELD — ALL or 1of 2 — (Appears only when 1of 2 FIELD is selected.
Using the Menus When bezel buttons corresponding to NEXT FIELD, ALT 2 FIELD, or ALT 4 FIELD are pushed, a box flashes momentarily around the on-screen label to verify that the selection has been made. Readout The line select readout (in the upper left of the CRT) consists of field followed by line number. When 15H is selected, the readout also displays the range of line numbers. For example, select FIELD 1 and 15H, then rotate the LINE SEL control to 34.
Using the Menus Preset Menu The 1760-- Series has 10 presets capable of storing front-panel setups. Nine of the presets are user-programmable and one is factory pre-programmed. Factory-programmed setup: WAVEFORM DISPLAY, CH-A INPUT, DC REST ON, 10 µs SWEEP, REF internal, and menus off. Push the PRESET menu button to access the on-screen menu, illustrated in Figure 3-5. Turn the left bezel control to select the PRESET location to be acted on (presets 1-- 9 are available through the menu).
Using the Menus Recall Use the left bezel control to select (outline) a preset for recall. Push RECALL to recall the stored instrument configuration. Recover Push RECOVER to restore the front-panel setup that was in effect before RECALL was pushed. Store To begin storing a setup, push STORE. Make sure the frontpanel controls are set as desired, and use the left bezel control to select the storage location (shown outlined).
Using the Menus Configure Menu Push the CONFIG button to display the configure menu, shown in Figure 3-6. Turn the left bezel control to select INPUT, VECTOR, FORMAT, STANDARD, OFFSET, CALIBRATE, REMOTE, or REFERENCE (a box appears around the selec- tion). Following are descriptions of each selection. INPUT H COUPLING — Selects AC or DC coupling for rear-panel inputs. H DC RESTORER —Selects the clamp speed. Slow will clamp while displaying any hum.
Using the Menus H A123 — and B123 — When COMPOSITE is se- lected, the instrument’s internal reference is the input channel currently selected for display. For COMPONENT, the internal reference is A1 when A123 is selected, and B1 when B123 is selected (sync is present only on the first channel). VECTOR H BARS — The instrument can be configured to accept 75% or 100% amplitude color bar signals. DualStandard instruments allow color bar signal amplitudes to be set for NTSC and for PAL operation.
Using the Menus Table 3-1. FORMAT 525/60 GBR SMPTE / EBU BETA MII 625/50 GBR SMPTE / EBU BETA MII [1] [2] [3] [3] Valid FORMAT selections. BARS [1] SETUP [2] 75% 100% Y 75% 100% Y • • • • • • • • • • • • • • • • N • • • • • N • • • • 75% or 100% Bars selected through CONFIG—VECTOR menu. Setup Yes or No is selected through the CONFIG—VECTOR menu. The setup selection is only relevant with 525/60 BETA, and is ignored in all other formats. MII is identical to SMPTE/EBU in 625/50.
Using the Menus OFFSET H The VERTICAL POSITION control normally positions all channels together. When OFFSET is enabled, the bezel controls can be used to offset input channels 2 (A or B) and 3 (A or B) with respect to channel 1 (A or B) . H While the offsets are enabled, the VERTICAL POSITION control will still position all channels together, with the offset amount remaining constant. When OFFSET is turned off, the input channels will be re-aligned.
Using the Menus CALIBRATE These choices are offered when CALIBRATE is selected: H CAL SIG — Turns the 1 V internal calibrator signal on/off. H GAIN CAL — Turns on the gain calibration adjust- ment on/off. Additional choices appear when CAL SIG or GAIN CAL is turned on: CAL SIG ON H In waveform mode, the user can set the calibrator frequency to 100 KHZ or to FSC OSC (FSC OSC = 3.58 MHz for NTSC/4.43 MHz for PAL). Dual-standard monitors also have the option of choosing NTSC FSC (3.
Using the Menus and RESET VCAL cancels any vertical gain adjustments; the instrument returns to the factory calibrated gain settings. H In vector mode, the center bezel control adjusts the vector signal gain. Once gain has been adjusted, RESET VCAL appears on screen. Selecting RESET VCAL cancels any vector gain adjustments and returns the instrument to the factory calibrated gain settings. REMOTE H The currently operating software version is displayed in the lower right corner of the screen.
Using the Menus H If NTSC and PAL external references are configured the same, the monitor automatically operates in the same television standard as the EXT REF input. When NTSC and PAL external references are configured differently, the monitor’s operating standard is determined by the standard of the displayed video instead of the EXT REF input. Once the operating standard is determined, the monitor immediately switches to the appropriate input for reference timing.
Using the Menus CRT Menu The following choices are available: H DISPLAY is used for signal and etched graticule adjustments. When DISPLAY is selected, the left bezel control adjusts the signal focus (FOCUS), the center bezel control adjusts the etched graticule illumination (SCALE) and the right bezel control adjusts the signal intensity (INTENSITY). H READOUT refers to electronic graticules, markers, menu and measurement readouts.
Using the Menus 3-28 1760 Series Component Waveform/Vector Monitor User Manual
Remote Operation The 25-pin rear-panel REMOTE connector is a subminiature D-type connector. It accepts the input for RGB/YRGB staircase, external horizontal, remote sync external blanking, time code, and Left and Right audio. TTL signal or ground closure to designated pins will enable Staircase, External Horizontal, or Remote Sync displays. When Remote Sync is enabled, the on-screen TIME/DIV. readout is not present.
Remote Operation 3-30 1760 Series Component Waveform/Vector Monitor User Manual
Making Measurements
Basic Measurements Basic Measurements contains 1760-- Series graticule descriptions, followed by specific measurement procedures. This monitor uses an internal graticule, which combines waveform and vector markings. The internal graticule scales are on the same plane as the CRT phosphor, eliminating parallax errors. Graticule illumination can be adjusted through the CRT menu (page 3-27) to provide optimum brightness for viewing or photographing displays.
Basic Measurements NTSC Vertical Scales The NTSC graticule is shown in Figure 4-1. The left side of the graticule is scaled in IRE units and extends from - 50 to +120 IRE in 10 IRE increments. A mV scale has been added to the right side of the NTSC graticule to facilitate component measurements. Black level setup is denoted by a dashed line at 7.5 IRE. There are ± 2 IRE and ± 4 IRE markings at the center of the - 40 IRE line to assist in measuring sync amplitude.
Basic Measurements PAL Vertical Scale The PAL graticule is shown in Figure 4-2. On the left side of the PAL graticule is a voltage scale that extends from 0 to 1.2 V. The graticules are also marked for K-- Factor tolerances and linear-distortion measurements. These measurements will be described later in this section. Component signals can be centered on the .35 V line. Audio K Factor 100% White Level Baseline Sync Tip Figure 4-2. PAL waveform/vector graticule.
Basic Measurements ular standard used. On-screen arrows point to the graticule scale (left side or right side) that is calibrated for the present operating mode, as defined in Table 4-- 1. Table 4 ---1. Dual-Standard Graticule Scales APPLICABLE GRATICULE SCALE COMPONENT FORMAT 525/60 STANDARD 625/50 STANDARD GBR Left Right SMPTE Right Right BETA Left Right MII Right Right Audio K Factor 100% White Level 75% White Level Baseline Setup Sync Tip IRE Scale Figure 4-3.
Basic Measurements Making Waveform Measurements Horizontal Sync Amplitude The vertical scale at sync tip (40 IRE NTSC or - 0.3 V PAL) provides ±2 and ±4 IRE (± 2 and ±4 mV) for measuring sync amplitude. Align the blanking level of a centered two-line waveform display on the graticule baseline to place the sync pulse directly over this structure. Measure sync amplitude directly from the graticule, or use the voltage cursors.
Basic Measurements To measure the K-- Factor line-time distortion, measure the largest deviation of the bar top (tilt or rounding) within the structure. The solid outer box equals a 4% K-- Factor, while the dashed line inner box equals a 2% K-- Factor. For signals with a bar half-amplitude duration that exceeds 18 s (8 s PAL), measure the bar top in increments by positioning the bar to the left or right of the leading or trailing edge. The first and last 1 s of the bar should be disregarded.
Basic Measurements NTSC The chrominance vectors terminate in a system of graticule targets consisting of two boxes (a small box inside a large box). A sample target is shown in Figure 4-4. The dimensions of the large boxes represent ±10° centered on the exact chrominance phase, and ±20% of chrominance amplitude centered around standard amplitude. The dimensions of the smaller boxes represent ±2.5° and ±2.5 IRE. R ° ° ° ° ° ° ° ° Figure 4-4. Vector targets --- NTSC values (PAL values in parentheses).
Basic Measurements Dual-Standard The 1765 graticule is a composite of the PAL and NTSC graticules. There are two inner targets within the larger target; the PAL target, and the NTSC target. The NTSC target is inside the PAL target.
Basic Measurements Making Vector Measurements Chroma Bandwidth The horizontal and vertical axes of the vector graticule contain markings for checking chroma bandwidth. A subcarrier frequency sine wave (whose amplitude places it on the outer compass rose) is used as a reference. When the frequency is changed, the diameter of the circle should reduce. At a point equal to 70.7% of full amplitude (-- 3 dB), there are gaps in the horizontal and vertical axes.
Basic Measurements Making SC/H Phase Measurements (Option SC Only) The SC/H display provides a vector display of the subcarrierto-horizontal-sync phase relationship. The burst vector and the phase of the 50% point of the leading edge of sync are displayed. NTSC Dual-Dot Display When REF is set to internal, the 1760 has a dual-dot SC/H display (Figure 4-6). The dots represent the 50% points of horizontal sync. To make a measurement, align the burst vector as shown in Figure 4-6.
Basic Measurements Sync Dot Burst Vector 0° Axis Sync Dot Relative angle indicates degree of SC/H phase. VECTOR PHASE Figure 4-6. NTSC dual-dot SC/H display. Burst Vector 0° Axis Sync Dot VECTOR PHASE Figure 4-7. NTSC single-dot SC/H display.
Basic Measurements PAL The 1761 uses a series of dots around the compass rose with a single dot in a blanked area to denote sync (see Figure 4-8). Place the burst vector at 0°, align the burst vectors with the graticule markings, and read the SC/H phase error as the amount of sync dot offset from the the horizontal axis. The input signal and the the EXT REF signal are properly color framed when the sync dot is within 90° of the burst vector. VECTOR PHASE Figure 4-8. PAL SC/H display.
Basic Measurements FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C Burst Horizontal Sync VECTOR PHASE Figure 4-9. Two-Line SC/H R ---Y display (NTSC), with proper SC/H phase. FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C VECTOR PHASE Figure 4-10. Two-Field SC/H R ---Y display (NTSC), showing proper SC/H phase.
Basic Measurements VECTOR PHASE Figure 4-11. Two-Field SC/H R ---Y display (NTSC), showing approximate 10° phase error. FLAT LUM CHROM DIFF R-- Y SCH R-- Y F+L F+L+C VECTOR PHASE Figure 4-12. Two-Field SC/H R ---Y display (PAL), showing proper SC/H phase.
Basic Measurements Making Audio Measurements An audio signal with no phase error appears as a straight line extending from the audio box in the upper right corner of the graticule to the box in the lower left. A signal with phase error appears as an opening in a Lissajous waveform. Figure 4-13 shows three audio input signals that are equal in amplitude, but have different phase relationships. Audio gain is set from the GAIN MENU when AUDIO display is selected.
Basic Measurements Lightning Measurements The Lightning display gives indication of absolute and relative amplitudes and relative timing of the three components. For a Lightning display, apply color-difference signals (Y, PB and PR) to the rear panel CH-A1, A2, and A3 (or CH-B1, B2, and B3) connectors. Push the front-panel LIGHTNING button. The instrument is forced to A123 input display (it can be changed to B123).
Basic Measurements For better viewing of Lightning displays, the GAIN menu and X5 can be selected. Press CLEAR MENU to clear the GAIN menu readout. Since the graticule is electronically generated, the calibration is not altered by X5 gain. Use the Vertical Position control to view the entire display. When X5 gain is no longer desired, select the GAIN menu again, and set gain to X1. To exit, push GAIN menu again, or push CLEAR MENU.
Basic Measurements of checking timing. The signal source can be adjusted until the ellipse disappears, providing a very accurate method of correcting timing errors. Timing errors are indicated by the trace moving away from the center timing dot. See Figure 4-15. For wide-band (≥1.5 MHz) component formats, the smaller spacings of dots represent approximately 40 ns of error; the larger spacing represents 80 ns. The timing dots represent proportionally larger errors for lower bandwidth signals.
Basic Measurements Using the Diamond Display The 1760-- Series internally transcodes the color-difference formats to GBR for the Diamond display. This display allows easy evaluation of the GBR signal for gamut limit violations. To obtain a DIAMOND display, input a GBR signal through the rear panel CH-A1, A2, and A3 (or CH-B1, B2, and B3) connectors. Push the LIGHTNING button. The instrument is forced to a component display (A123 or B123 input). Use the CONFIG—FORMAT menu to select the DIAMOND display.
Basic Measurements NOTE A valid GBR signal is guaranteed if the signal is within the Diamond graticule. However, this does not guarantee that the signal will be within appropriate composite limits if encoded into composite NTSC. Signals outside the diamonds are subject to reproductive errors in any format. The graticule is labeled with G, B, and R to determine the color problem in a GBR sense.
Basic Measurements Using the Bowtie Display When used with the Bowtie signal, the Bowtie display is a high-resolution timing indicator. Route a Bowtie test signal from the generator, through the equipment under test, and connect to the 1760-- Series rearpanel CH-A1, A2, and A3 connectors. Use caution when deciding where the Bowtie signal is routed; when transcoded to GBR or encoded to composite, it produces and illegal signal with potential unwanted side effects.
Basic Measurements The Bowtie test signal consists of a 500 kHz sine wave on Channel 1 and 502 kHz sine waves of the same amplitude on Channels 2 and 3. The Channel 2 and 3 waveforms are generated to be exactly in phase with the Channel 1 signal in the center of the line. The 1760-- Series subtracts Channel 2 from Channel 1 to make the left half of the display, and Channel 3 from Channel 1 for the right half.
Basic Measurements Time Code Display Linear Time Code, also known as Longitudinal Time Code (LTC), is an 80-bit signal with information which makes it possible to accurately identify an individual frame of recorded video. LTC is typically recorded on an unused audio track. The 1760-- Series monitor provides a voltage-versustime display of the Time Code waveform, which can be used to check for the following problems: H No signal. H Sync word in the wrong position (improper Time Code-to-Video sync).
Basic Measurements 4-24 1760 Series Component Waveform/Vector Monitor User Manual
Calibration Instrument gain may require readjustment for special monitoring applications. To prevent erroneous measurements, gain should be adjusted only by qualified personnel. Normal instrument calibration, performance verification, and service maintenance are covered in the service manual, which will be published as a separate volume. Adjusting Instrument Gain Instrument gain can be adjusted through the CONFIG—CALIBRATE menu. CONFIG menu is described on page 3-20. Set Vertical Gain 1.
Calibration Set Horizontal Gain 1. To set horizontal gain, push the CONFIG menu button. Select CALIBRATE, then CAL SIG ON and 100 KHZ. Select GAIN CAL ON. a. In 1 LINE SWEEP (5 µs/div), adjust the HORIZ CAL control for one-half cycle per major graticule division; in 2 LINE SWEEP (10 µs/div), adjust for one full cycle per major division. b. Pushing RESET H CAL will cancel any gain adjustment and reinstate the factory gain setting. Set Vector Gain 1.
Appendices
Appendix A Performance Specification The specification tables use the following abbreviations. Performance Requirement (Req). All performance requirements in the specification tables are identified with Req, and can be assured by completing the Performance Check Procedure (1740A/ 1750A/1760-- Series Service Manual.) Allow a warm-up time of 20 minutes. Performance requirements in the electrical specifications are valid over an ambient temperature range of +20° C to +30° C.
Appendix A: Performance Specification Electrical Specifications Table A- 1: Waveform Vertical Deflection CATEGORY DESCRIPTION Deflection Factor Req: 1 V full scale (X1): 1 volt input displayed with- in 1% of 140 IRE (1.00 V PAL) X5 Gain: 0.2 volt input displayed within 1% of 140 IRE (1.00 V PAL) X10 Gain: 0.1 volt input displayed within 1% of 140 IRE (1.00 V PAL) RI: Any one of the 8 inputs Variable Gain Range Req: 0.2X to 1.
Appendix A: Performance Specification Table A- 1: Waveform Vertical Deflection (Cont.) CATEGORY Video Input Crosstalk Between Channels Frequency Response (Flat) DESCRIPTION RI: Typically ≥60 dB Req: ±2% to 10 MHz (X1 Gain) ±4% to 10 MHz (X5 and X10 Gain), on screen signal (0.2 V or 0.1 V) RI: Luminance Filter Gain All inputs ac or dc coupling Req: 1 ±1% RI: Reference is FLAT at 50 kHz.
Appendix A: Performance Specification Table A- 1: Waveform Vertical Deflection (Cont.) CATEGORY DESCRIPTION Transient Response Req: Pulse-to-Bar Ratio 0.99:1 to 1.
Appendix A: Performance Specification Table A- 1: Waveform Vertical Deflection (Cont.) CATEGORY DESCRIPTION Blanking Shift with Presence and Absence of Burst Req: ≤1 IRE (7 mV PAL) RI: Typically 3 mV Table A- 2: External Reference CATEGORY DESCRIPTION Input RI: Composite video or black burst Maximum Operating Input Voltage RI: --1.8 V to +2.2 V, dc + peak ac Absolute Maximum Input Voltage RI: --8.5 V to +8.
Appendix A: Performance Specification Table A- 3: Waveform Horizontal Deflection CATEGORY DESCRIPTION Sweep Req: Synchronization: Sweep triggered by horizon- tal and vertical sync pulses Sweep Timing Accuracy RI: Sweep Length: ≈12 divisions RI: Sweep freeruns without input Req: 1 Line: 5 s/division ±1% 2 Line: 10 s/division ±1% RI: 1 Field displays one full field, including field rate sync. 2 Field displays two full fields and the field rate sync between them.
Appendix A: Performance Specification Table A- 4: Measurement Cursors CATEGORY DESCRIPTION Waveform Accuracy Req: Voltage: 0.5% Timing: 0.5%, for line-rate sweeps RI: Vector Accuracy Typically 0.5% for field-rate sweeps Req: Gain: ±1.5% Phase: ±1° RI: Measured with respect to the Color Bar signal Table A- 5: RGB/YRGB CATEGORY DESCRIPTION RGB/YRGB Req: Staircase input gain: 0.
Appendix A: Performance Specification Table A- 6: Calibrator CATEGORY DESCRIPTION Waveform Square Wave Req: Amplitude: 1.0 V ±0.5% Req: Frequency: 100 kHz ±0.1% RI: Crystal controlled 10 s square wave Req: Amplitude: 1.
Appendix A: Performance Specification Table A- 7: Vector Mode (Cont.) CATEGORY Subcarrier Regenerator Pull-in Time DESCRIPTION RI: ≤2 seconds Phase Shift with FSC Change Req: NTSC: Phase Shift with Burst Amplitude Change of ±6 dB Req: ≤ 2° Phase Shift With Video Input Channel Change Req: ≤1° Phase Shift With Variable Gain Control +3 dB to --6 dB Req: ≤0.5° Burst Jitter Clamp Stability PAL: RI: RI: ≤2° (FSC to FSC ±50 Hz) ≤2° (FSC to FSC ±10 Hz) With external reference selected.
Appendix A: Performance Specification Table A- 8: Audio Mode CATEGORY DESCRIPTION Input RI: DC coupled, differential input Input Impedance RI: 20 kΩ Full Scale Selection RI: 0, 4, 8, & 12 dBm full scale. Menu selected. Full Scale Accuracy Req: ±0.5 dB Maximum Input Voltage RI: Measured at 1 kHz RI: ±8 V peak RI: Measured to chassis ground Bandwidth (--3 dB) Req: --3 dB ≥200.
Appendix A: Performance Specification Table A- 10: SCH Phase Mode (OPT SC Only) CATEGORY DESCRIPTION Absolute Accuracy Req: ≤5° RI: Applies over a temperature range of 0 -- 50° C RI: Calibrated at 25° C. ±3 dB input amplitude. Typically ≤5° with ±6 dB input amplitude. Relative Accuracy RI: 2° Acquisition Time RI: ≤1 Second Displayed Phase Error Caused by CRT Geometry Variations RI: ±1.
Appendix A: Performance Specification Table A- 11: Component Vector Mode (Cont.) CATEGORY DESCRIPTION Display to Graticule Registration Req: ≤0.25 box with the color bar black display dot centered in target RI: Vector Display Ch A2 or B2 is displayed on the horizontal axis and Ch A3 or B3 is displayed on the vertical axis.
Appendix A: Performance Specification Table A- 14: Transcoded GBR Outputs CATEGORY Input Format Accuracy GBR Output Impedance DESCRIPTION RI: GBR, SMPTE, MII, or Betacam format; selectable from a menu Req: 1 ±3% RI: Typically <1% RI: No line select strobe on GBR outputs RI: Nominally 75Ω; back porch clamped to 0V Table A- 15: CRT Display (PAL Values in Parentheses) CATEGORY DESCRIPTION CRT Viewing Area RI: 80 X 100 mm Horizontal: 12.5 divisions Vertical: 170 IRE (1.
Appendix A: Performance Specification Table A- 17: Environmental Characteristics CATEGORY DESCRIPTION Operating Temperature Req: 0° to 50° C (+32° to 122° F) Storage Temperature Req: --40° to 75° C (--40° to 158° F) Operating Altitude Req: To 15,000 feet (4572 meters) Storage Altitude Req: To 50,000 feet (15,240 meters) Vibration Req: 5 minutes at 5 -- 15 Hz with 0.060 inch dis- placement 5 minutes at 15 -- 25 Hz with 0.040 inch displacement 5 minutes at 25 -- 55 Hz with 0.
Appendix A: Performance Specification Certifications and Compliances Table A- 19: Certifications and compliances CATEGORY STANDARDS OR DESCRIPTION EC Declaration of Conformity -- EMC 1 Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility.
Appendix A: Performance Specification Table A- 19: Certifications and compliances (cont.) CATEGORY STANDARDS OR DESCRIPTION CAT I Pollution Degree Secondary (signal level) or battery operated circuits of electronic equipment. A measure of the contaminates that could occur in the environment around and within a product. Typically the internal environment inside a product is considered to be the same as the external. Products should be used only in the environment for which they are rated.
Appendix A: Performance Specification Table A- 19: Certifications and compliances (cont.) CATEGORY STANDARDS OR DESCRIPTION Additional Compliance IEC61010-1 Safety requirements for electrical equipment for measurement, control, and laboratory use.
Appendix A: Performance Specification A-18 1760 Series Component Waveform/Vector Monitor User Manual
Appendix B Remote Connectors The rear-panel remote connector is a 25-pin sub miniature D-type with female contacts. Table B-1 shows pin assignments and Figure B-1 shows the connector. Remote Connector 13 25 1 REMOTE ! 14 Figure B-1. Rear panel REMOTE connector. Table B-1. Remote Pin Functions and Signal Requirements. Pin No. Function Signal Requirement 1 RGB/YRGB Staircase Input +10 V for RGB/YRGB Miscellaneous Information ≈9 div of sweep.
Appendix B: Remote Connectors Table B-1. Pin No. Remote Pin Functions and Signal Requirements. (Cont.) Function Signal Requirement Miscellaneous Information 5 Remote Sync Input TTL level square wave 30/90 Hz for NTSC triggers a 2-field rate 25/100 Hz for PAL sweep. 6 Remote Sync Enable Ground (TTL low) 7 Ground 8 +Y Audio Input Max. Input ±8 V peak Measured to Chassis Ground. 9 - Y Audio Input 10 +X Audio Input Max. Input ±8 V peak Measured to Chassis Ground. 11 - X Audio Input Max.
Appendix B: Remote Connectors Table B-1. Pin No. Remote Pin Functions and Signal Requirements. (Cont.) Function Signal Requirement Miscellaneous Information 20 Preset 4 Ground (TTL low) Grounding pin 20 recalls setup from preset 4. Grounding pins 20 and 25 stores current setup at preset 4. 21 Preset 5 Ground (TTL low) Grounding pin 21 recalls setup from preset 5. Grounding pins 21 and 25 stores current setup at preset 5.
Appendix B: Remote Connectors Remote Connector Converter If the 1760-- Series is used as a direct replacement for a 1740-- Series or 1750-- Series instrument, construct an adapter or rewire the remote cable according to Figure B-2. If the 1760-- Series replaces an Option 16 instrument, construct the adapter in the same manner, omitting the pin 3-to-pin-25 connection.
Appendix B: Remote Connectors RS232 Connector The serial interface has a driver built in for RS232 serial binary data interchange. The operational mode is full duplex. The data rate is selectable through the Configure menu for either 1200, 4800, or 9600 baud; data type is asynchronous. Figure B-3 shows the pin assignments. PIN NUMBER 5 9 1 RS232 6 1. 2. 3. 4. 5. 6. 7. 8. 9.
Appendix B: Remote Connectors B-6 1760 Series Component Waveform/Vector Monitor User Manual
Appendix C User Service This section contains instructions for user and preventive maintenance. If the instrument does not function properly, it should be referred to qualified service personnel or returned to Tektronix for service. Packaging directions for shipment are on page 1-9. Cleaning or Replacing the Fan Filter To ensure adequate air flow, it is essential to clean or replace the rear-panel fan filter regularly.
Appendix C: User Service Graticule Light Replacement Replacement Bulbs Replacement bulbs are supplied with this instrument as Standard Accessories. Additional bulbs can be purchased from Tektronix or from local electronics distribution sources. The Tektronix part number and ordering information is given on page 1-7. Required Equipment NOTE For graticule light removal and replacement, tweezers with curved, serrated tips are recommended.
Appendix C: User Service 3. To remove a bulb, position the tweezer tips on the thin, flat portion of the bulb (close to the plastic socket). Carefully pull the bulb straight out. 4. To install a new bulb, hold it with the tweezers as described in step 3, position it in front of the socket, and push the bulb until it snaps in place. 5. Replace the panel below the CRT, and press on both the right and left sides of the panel until it snaps into place. 6.
Appendix C: User Service Cleaning The instrument should be cleaned often enough to prevent dust and dirt from accumulating. Dirt acts as a thermal insulator, preventing effective heat dissipation, and can also provide high-resistance electrical leakage paths between conductors or components in a humid environment. CAUTION Do not allow water to get inside any enclosed assembly or component.
Appendix C: User Service CAUTION A 2% RMA flux content solder is recommended for making repairs in this instrument. Cleaning of rosin residue is not recommended. Most cleaning solvents tend to reactivate the rosin and spread it under components where it may cause corrosion under humid conditions. The rosin residue, if left alone, does not exhibit these corrosive properties. Replacing the CRT Filter A smoke-gray filter is installed over the face of the CRT. The filter part number is given on page 1-7.
Appendix C: User Service C-6 7. Replace the panel below the CRT, and press on both the right and left sides of the panel until it snaps into place. 8. Replace the five knobs below the CRT and tighten the set screws.
Appendix D Software Version Table D-1. Software Releases Version Date 2.1 APR 1993 2.2 OCT 1993 Serial No. B010100 Mod No. Comments Original software New features: On-screen field sweep indication. Configure menu selection for RGB Parade display. Audio & Time Code unit of measure changed to dBu. On-screen pointer to left or right side graticule for dual standard. Limited the 1of4 and 1of8 line select menu entries to insturments with SC/H function only.
Appendix D: Software Version D-2 1760 Series Component Waveform/Vector Monitor User Manual
Glossary
Glossary AC Coupled A connection which removes the constant voltage (DC component) on which the signal (AC component) is riding. Usually implemented by passing the signal through a capacitor. Analog Components Video signals in which a continuously variable voltage or current (rather than a set of numbers) represents the value of a pixel. APL (Average Picture Level.
Glossary Black Burst (PAL) Also called “color black,” black burst is a composite video signal consisting of all horizontal and vertical synchronization information and burst. Typically used as the house reference synchronization signal in television facilities. Blanking Level Refers to the 0 IRE level for NTSC systems (0.3 volt level, with respect to sync tip, for PAL systems) which exists before and after horizontal sync and during the vertical interval.
Glossary B--Y (PAL) One of the color difference signals used in the PAL system, obtained by subtracting luminance (Y) from the blue camera signal (B). CAV Component Analog Video; component video signals in which an analog voltage or current (rather than a set of numbers) represents the value of the pixel; the same as “analog components.” Chrominance Chrominance refers to the color information in a television picture. Chrominance can be further broken down into two properties of color: hue and saturation.
Glossary CW Continuous Wave. Refers to a separate subcarrier sine wave used for synchronization of chrominance information. dB (Decibel) A decibel is a logarithmic unit used to describe signal ratios. For voltages, dB = 20 Log10 (V1/V2). DC-Coupled A connection configured so that both the signal (AC component) and the constant voltage on which it is riding (DC component) are passed through.
Glossary Frequency Modulation (FM) is the process by which the frequency of a carrier signal is varied in proportion to the signal of interest. In both the NTSC and PAL television systems, audio information is transmitted using FM. Frame A frame (sometimes called a “picture”) contains all the information required for a complete picture. For interlaced scan systems, there are two fields in a frame.
Glossary Horizontal Sync Horizontal sync is the - 40 IRE pulse in NTSC systems (-- 300 mV pulse for PAL systems) occurring at the beginning of each line. This pulse signals the picture monitor to go back to the left side of the screen and trace another horizontal line of picture information. Hue Hue is the property of color which allows us to distinguish between colors such as red, yellow, purple, etc.
Glossary Modulated (PAL) When referring to television test signals, this term implies that chrominance information is present. (For example, a modulated staircase has subcarrier on each step.) Modulation A process which allows signal information to be moved to other frequencies in order to facilitate transmission or frequency-domain multiplexing. See FM for details. Nonlinear Distortion Refers to distortions which are amplitude-dependent. NTSC National Television System Committee.
Glossary ated by the camera and used by the picture monitor to produce a picture. The same signals may also be called “GBR” as a reminder of the mechanical sequence of connections in the SMPTE interconnect standard. R--Y One of the color difference signals is obtained by subtracting luminance (Y) from the red camera signal. Saturation The property of color which relates to the amount of white light in the color.
Glossary Synchronous Detection A demodulation process in which the original signal is recovered by multiplying the modulated signal with the output of a synchronous oscillator locked to the carrier. Termination In order to accurately send a signal through a transmission line, there must be an impedance at the end which matches the impedance of the source and of the line itself. Amplitude errors and reflections will otherwise result.
Glossary Waveform Monitor A specialized oscilloscope that plots voltage versus time to evaluate television signals. Y Abbreviation for luminance. Y, I, Q The set of CAV signals specified for the NTSC system; Y is the luminance signal, I is the first color difference signal and Q is the second color difference signal. Y, PB, PR A version of Y, R-- Y, B-- Y specified for the SMPTE analog component standard.
Index
Index A Camera, 1-7 A123/B123, 2-6, 3-5 Certifications, A-15 Accessories, 1-7 field upgrade kits, 1-8 Chroma bandwidth measurements, 3-9, 4-8 Carrying case, 1-8 incoming inspection list, 1-9 Clamp point, 3-20 optional, 1-7 Cleaning standard (included), 1-7 Air filters, replacement, 1-7 Audio air filter (fan filter), C-1 the CRT, C-4 the instrument, C-4 Display, 2-4, 3-2 Clear menu, 2-7 Measurements, 4-14 Color framing, 3-2 Audio Mode, Specification, A-10 Auto cursor units, 3-22 television s
Index D G DC restorer, 2-5 Gain slow or fast, 3-20 Diamond Display, 4-18 adjustment, 4-23 menu, 3-26 Differential gain measurements, 4-8 reset, 3-24, 3-25 Differential phase measurements, 4-8 X1, X5, X10, 3-26 Differentiated step filter, 3-9 Graticule Dimensions, A-14 Display modes, 2-4, 3-1 illumination, 3-27 vector, 4-6 Dual-standard graticule, 4-7 waveform, 4-1 Graticule lights part number, 1-7 E replacement, C-2 Electrical installation, 1-10 Electrical specification, A-2 Environmental
Index L Multiple display, 2-5, 3-4 Multi-use controls, 2-2 Light bulbs, part number, 1-7 LIGHTNING display, 2-4 Lightning Measurements, 4-15 Lightning Mode, Specification, A-12 O Line select menu, 3-16 Offsets, enable, 3-23 Line/Field selection, 2-5 Operating standard, 1-1, 3-22 Operating voltage, 1-11 Lissajous waveform, 4-14 Luminance filter, 3-9 Option SC, 1-5 Optional accessories, 1-7 Options, 1-5 M Ordering accessories, 1-8 Overlay mode, 2-6, 3-6 Magnifier, 2-5, 3-6 Mains frequency, 1-11 M
Index Reference (internal/external), 3-25 Measurement Cursors, A-7 Reliability, A-2 Physical Characteristics, A-14 Remote connector Power source, A-13 configuration, 3-25 description, 2-8, B-1 RGB/YRGB, A-7 SCH Phase Mode, A-11 pin assignments, B-1 Time code, A-10 wiring converter, B-4 Transcoder GBR Outputs, A-13 Remote sync, B-2 Vector Mode, A-8 Rename presets, 3-19 Reset, locked instrument controls, 2-1 Waveform Horizontal Deflection, A-5 Waveform Vertical Deflection, A-2 Reset gain, 3-2
Index V W Variable gain, 3-26 Waveform cursors, 3-11 Vector display, 2-4, 3-1 Vector graticule, 4-6 Waveform display, 2-4, 3-2 Waveform graticule, 4-1 Vector markers, 3-10 Waveform markers, 3-11 Vector Mode, Specification, A-8 Waveform Horizontal Deflection, Specification, A-5 Vertical Deflection, Specification, A-2 Vertical position control, 2-4 Viewing hood (optional accessory), 1-7 Voltage cursors, 3-11 Waveform Vertical Deflection, Specification, A-2 White phosphor, 1-6 Weight, A-14 1760 Se
Index I ---6 1760 Series Component Waveform/Vector Monitor User Manual
