INSTRUCTION BOOK OPERATING INSTRUCTIONS SERIES 4201 MULTI-CHANNEL RF DIRECTIONAL THRULINE® WATTMETER Electronic Corporation Cleveland (Solon) Ohio USA ©Copyright 1997 by Bird Electronic Corporation Instruction Book Part Number 920-4201S Revision A Thruline® is a Registered Trademark of Bird Electronic Corporation
Safety Precautions General Safety Precautions The following are general safety precautions that are not necessarily related to any specific part or procedure, and do not necessarily appear elsewhere in this publication. These precautions must be thoroughly understood, and apply to all phases of operation and maintenance. Keep Away From Live Circuits Operating personnel must at all times observe general safety precautions. Do not replace components inside equipment with the high voltage supply turned on.
Bird Series 4201 Multi-Channel RF Directional Wattmeter USAGE ANY USE OF THIS INSTRUMENT IN A MANNER NOT SPECIFIED BY THE MANUFACTURER MAY IMPAIR THE INSTRUMENT’S SAFETY PROTECTION. USO EL USO DE ESTE INSTRUMENTO DE MANERA NO ESPECIFICADA POR EL FABRICANTE, PUEDE ANULAR LA PROTECCIÓN DE SEGURIDAD DEL INSTRUMENTO. BENUTZUNG WIRD DAS GERÄT AUF ANDERE WEISE VERWENDET ALS VOM HERSTELLER BESCHRIEBEN, KANN DIE GERÄTESICHERHEIT BEEINTRÄCHTIGT WERDEN.
ASSISTENZA TECNICA LE ISTRUZIONI RELATIVE ALL’ASSISTENZA SONO PREVISTE ESCLUSIVAMENTE PER IL PERSONALE OPPORTUNAMENTE ADDESTRATO. PER EVITARE PERICOLOSE SCOSSE ELETTRICHE NON EFFETTUARRE ALCUNA RIPARAZIONE A MENO CHE QUALIFICATI A FARLA. RF VOLTAGE MAY BE PRESENT IN RF ELEMENT SOCKET - KEEP ELEMENT IN SOCKET DURING OPERATION. DE LA TENSION H.F. PEAT ÊTRE PRÉSENTE DANS LA PRISE DE L’ÉLÉMENT H.F. - CONSERVER L’ÉLÉMENT DANS LA PRISE LORS DE L’EMPLOI.
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About This Manual This instruction book covers the Series 4201 Multi-Channel RF Directional Wattmeters. Specifically, the Models 4201A501, 4201A502, 4201A503, and 4201A504. This instruction book is arranged so that essential information on safety appears in the front of the book. Reading the Safety Precautions section before operating the equipment is strongly advised. The remainder of this instruction book is divided into Chapters.
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Table Of Contents Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Warning Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii Caution Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii About This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Wattmeter. . . . . . . . . . . . . . .
Bird Series 4201 Multi-Channel RF Directional Wattmeter viii Models 4201A501 and 4201A502. . . . . . . . . . . . . . . . . . . . . . . . . . 10 Models 4201A503 and 4201A504. . . . . . . . . . . . . . . . . . . . . . . . . . 10 VSWR Conversion Nomograph. . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction Wattmeter Purpose and Function The 4201 Series Multi-Channel RF Directional Wattmeter is used in conjunction with Bird Power Sensors, or rigid line sections and elements. Together these components build a RF power measurement system capable of displaying RF power of up to 24 transmitters, depending on the model used. Dual meters simultaneously display forward and reflected power in a 50 ohm transmission line.
Bird Series 4201 Multi-Channel RF Directional Wattmeter Specifications Model 4201A501 4201A502 4201A503 4201A504 Channels 24 12 24 12 Meter Scale 25/50/100 W 25/50/100 W 15/30/60 W 15/30/60 W Each Transmitter Requires Dual Rigid Line Section and Elements Dual Rigid Line Section and Elements Power Sensor Power Sensor Models: 4201A501, 4201A502 Power Range Freq.
Introduction Series 4201 Outline Drawing Models 4201A501 and 4201A503 + + CHANNEL B 19 18 20 16 21 15 22 14 13 51000 MODEL 4201 THRULINE BIRDELECTRONIC CORP. R 24 CHANNEL RF POWER METER PN 2080 - 002 7 6 0 24 CHANNEL A 10 15 20 20 3 100 40 2 600 40 8 WATTS 0 5 F.S. = 30 UA. 51000 10 15 20 20 3 100 40 2 600 40 8 WATTS 0 5 23 0 17 THRULINE BIRDELECTRONIC CORP. R PN 2080 - 002 F.S. = 30 UA.
Bird Series 4201 Multi-Channel RF Directional Wattmeter Power Sensors Power Sensors, for use with Models 4201A503 and 4201A504 Series Wattmeters, currently available are listed below. Specifications Model 4152-220 4163-240 4164-240 4169-300 FWD Max. Power 150 W 150 W 150 W 60 W Insertion VSWR Insertion Loss Directivity Accuracy Connectors: RF Input RF Output DC Outputs Finish Nominal Size (Including connector) Nominal Weight 4 RFL Max. Power 15 W 15 W 15 W 6 W 1.1 max. 0.2 dB 25 dB min.
Chapter 2 Installation This chapter provides information for on site requirements, unpacking, inspection, and preparing the equipment for use. The 4201 Series Multi-Channel RF Wattmeter is designed to be used with either rigid line sections and elements, or power sensors. Throughout this section, refer to the instructions that apply to your system. Site and Shelter Requirements Unpacking and Inspection The 4201 Series Wattmeter should not be used outdoors or in areas of condensing humidity.
Bird Series 4201 Multi-Channel RF Directional Wattmeter 2. If you are using power sensors, attach the cables to the power sensors. Attach the forward meter cable to the forward feed-thru on the power sensors, and the reflected meter cable to the reflected feed-thru. Attach by soldering the cable to the feed-thru. Repeat for each transmitter. Refer to figure 3. Figure 3 Power Sensor and Cable Phono Connector Feed-Thru Connectors R POWER SENSOR MOD. 4169-300 S/N RFL 6.
Installation Figure 5 Input Designations INPUT CHANNEL A : INPUTS 1 - 12 CHANNEL B : INPUTS 13 - 24 FWD SENSORS : WHITE INPUTS RFL SENSORS : RED INPUTS MODULE OUTPUT ! SENSOR CONNECTIONS 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 Top of Module 13 - 24 Rear of Module 1 - 12 On the top of the module, the sensor connections are labeled. The inputs are on the rear of the module.
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Chapter 3 Operating Instructions A description of all operator controls and indicators are provided in this chapter. Read and become familiar with the following instructions before operating the wattmeter. Description of Controls The controls of the wattmeter are on the front of the unit. Refer to the proper section for your model. Models 4201A501 and 4201A503 These models have 24 channels for transmitters. They have two rotary channel selector switches and a channel A/B push button. Refer to figure 6.
Bird Series 4201 Multi-Channel RF Directional Wattmeter Zeroing Meters Before any power measurements are made, be sure the pointer rests on the zero mark. If not, adjust the zero adjustment screw clockwise or counterclockwise until the pointer rests on the zero mark. The adjusting screw is located at the bottom center of the meter bezel face. Perform this adjustment, if needed, on both meters. Refer to figure 8.
Operating Instructions Using the VSWR Nomograph, determine the intersection of the forward and reflected power values. The slanted line passing closest to this point indicates the VSWR. VSWR Conversion Nomograph Figure 9 VSWR Conversion Nomograph 20 18 16 14 VSWR= 12 Reflected Power 1+ Forward Power 1 10 Reflected Power Forward Power 6 VS WR 4 2. 5 3. 0 4. 0 10 2. 0 2.0 1.8 1.6 1.4 1. 5 1. 6 1. 8 1. 4 1.2 3 1.0 25 1. REFLECTED POWER - WATTS 8 07 1. 1. 05 1. 06 1. 1. .
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Chapter 4 Maintenance General This chapter includes cleaning, inspection, troubleshooting, and performance information. The Wattmeter Models 4201A501, 4201A502, 4201A503, and 4201A504 require only simple, and routine maintenance such as the following: s Avoid subjecting the wattmeter to rough treatment. s Wipe off dust and dirt regularly. s Check connectors for damage. s Inspect all cables for damage.
Bird Series 4201 Multi-Channel RF Directional Wattmeter Troubleshooting Use the following table to aid in isolating problems, their cause, and possible corrections. Table 1 Troubleshooting Table Problem Meter does not indicate power Possible Cause No transmitted power. No connection from signal source to input channels of wattmeter. Poor contact between mating connectors. Broken or damaged cable connection. Meter power reading is incorrect. Channel selector switch on wrong channel. Meter is damaged.
Maintenance Cleaning The outside surface of the unit may be cleaned occasionally with a soft cloth dampened with a mild detergent solution. Clean the connectors frequently with alcohol, or an acceptable dry cleaning solvent that does not leave a residue. + Note: Do not wipe the meter glass with a dry cloth, a static charge will develop and cause an erroneous indication on the meter scale. Meter Replacement CAUTION Do not attempt to check the microammeters with an ohmmeter.
Bird Series 4201 Multi-Channel RF Directional Wattmeter 1. Remove the meter from the rack by removing the four screws holding the panel in place. 2. Remove the leads from the meter, make a note of the locations. 3. Remove the leads from the phono jacks. 4. Attach the new cable to the meter. 5. Push the cable plug into the phono jack. 6. Repeat if necessary with the second cable. 7. Install the panel in the rack, using the four screws removed previously. 4201A004 The 4201A004 cables are also replaceable.
Limited Warranty All products manufactured by Seller are warranted to be free from defects in material and workmanship for a period of one (1) year, unless otherwise specified, from date of shipment and to conform to applicable specifications, drawings, blueprints and/or samples.
