Instruction Manual Model 106C/130/155 Optical Module Berkeley Nucleonics Corporation 2955 Kerner Blvd. San Rafael, CA 94901 Ph: 415-453-9955 Fx: 415-453-9956 www.berkeleynucleonics.
WARRANTY Berkeley Nucleonics Corporation warrants all instruments, including component parts, to be free from defects in material and workmanship, under normal use and service for a period of one year. If repairs are required during the warranty period, contact the factory for component replacement or shipping instructions. Include serial number of the instrument. This warranty is void if the unit is repaired or altered by others than those authorized by Berkeley Nucleonics Corporation.
CONTENTS Page SECTION 1 SPECIFICATIONS 7 Model 106C, 155 and 130 Characteristics Module Status Byte Summary 7 9 SECTION 2 OPERATING INFORMATION 10 Features General Power Up Module Installation Safety Precautions Warm Up Requirements Troubleshooting Default Settings Front Panel Description LED Indicators Connectors Rear Panel Description Mainframe Operation Front Panel Programming Remote Programming 10 11 11 11 11 11 11 12 12 12 13 13 13 13 16 SECTION 3 THEORY OF OPERATION 17 General Module Interf
CONTENTS SECTION 4 MAINTENANCE AND CALIBRATION 27 Maintenance Light Output Connector Calibration General Equipment Required Procedure Module Interface DAC Calibration External Drive Discriminator CW and External Modulation Calibration Pulse Baseline Calibration Pulse Peak Calibration Pulse Dynamic Characteristics SECTION 5 PARTS LISTS AND SCHEMATICS 27 27 27 27 27 28 28 28 29 29 29 30 31 Parts List 31 Laser Output Board, 155-1 Module Interface Board, 6040-4 31 35 Schematics Dwg.No.
CONTENTS ILLUSTRATIONS Figure No. 1-1 2-1 3-1 3-2 Page Trigger and Output Pulse Timing Safety Labels Module Interface Block Diagram Laser Output Block Diagram TABLES Table No.
1064nm, 1560nm AND 1310nm OPTICAL MODULES MODEL 106C, MODEL 155 AND MODEL 130 Graphic (Model 155 & 130) The Model 106C, Model 155 and Model 130 are three in a series of plug-in modules that provide electrical and optical output pulses when installed in the Model 6040 mainframe. These particular modules provide optical pulses of 1064, 1560 and 1310 nm wavelengths at peak levels to 1 mV at rates to 100 MHz.
SECTION 1 SPECIFICATIONS MODEL 106C/155/130 CHARACTERISTICS Timing Characteristics Rep Rate: 0 Hz-100 MHz Width: 3 ns - 640 s (Pulse Mode); 3 ns (min.) at reduced amplitude. Impulses, fixed 400 ps fwhm (typical). Input Characteristics EXTERNAL DRIVE Range: dc - 300 MHz (200 MHz for zero Baseline level): specifications apply dc - 100 MHz.
SPECIFICATIONS cont’d. Output Characteristics LIGHT OUT Wavelength: Spectral Width: Power Level: Power Level Resolution: Extinction Ratio: Mesial Level: Pulse Adjustment Range: Accuracy, Absolute: Accuracy, Relative: Temperature Coefficient: Transition Times (10 to 90%): Insertion Delay: Jitter: Connector: Model 106C: 1064nm ±30 nm Model 155:1550 nm ±30 nm. Model 130:1310 nm ±50 nm. 2 nm rms (from 50 uW to 1 mW). 1 mW max. (Peak or Baseline). 0 mW min. Impulse is fixed at 50 µW Baseline and 0.
SPECIFICATIONS cont’d. Modes PULSE Conventional pulse generator with rate, delay, width and single/double pulse selections controlled by the 6040 mainframe. External Drive operation produces pulses corresponding in rate and duty cycle to an external pulse train. EXTERNAL MODULATION Converts digital and analog electrical signals are into their optical equivalent. IMPULSE Provides a narrow pulse of fixed width and amplitude, with rate and delay controlled by the 6040 mainframe.
SECTION 2 OPERATING INFORMATION FEATURES The Model 106C, 155 and 130 plug-in modules provide 1064nm, 1550 nm and 1310 nm optical output sources for the Model 6040 Universal Pulse Generator. Accurate and adjustable outputs are available for all of the four modes in which the 6040 mainframe can operate. In Pulse Mode operation, the 106C/155/130 supplies flat-topped pulses with fast rise and fall times and independently adjustable Peak and Baseline levels.
OPERATING INFORMATION General POWER UP When power is applied to the 6040 mainframe with a 106C, 155 or 130 module installed, the instrument settings from the module's memory 0 are activated. The mainframe automatically checks what type of plug-in module is in place and loads the appropriate parameters. The LCD, after showing the mainframe's software version number and performing a memory check, will display "106C Ver. x.x" (or “155 Ver. X.x” or "130 Ver. x.x") where "x.
OPERATING INFORMATION cont’d The Quick Test procedure for the mainframe may be applied to the 106C/155/130 by selecting the Pulse Mode and following the test sequence using the module's LIGHT OUT connector and an optical detector in place of the mainframe's PULSE OUT. After Pulse Mode operation has been verified, the Impulse Mode can be tested. This will require a sampling oscilloscope with a 1 GHz bandwidth. The impulse should appear as a narrow pulse (approximately 400 ps).
OPERATING INFORMATION cont’d CONNECTORS Three connectors appear on the 106C/155/130 module front panel. LIGHT OUT provides the optical output from the module. A single-mode 8/123 Mm fiber with an ST connector is required (the unit can be configured for other connectors; consult the factory for details). To keep dust out of the connector when a fiber is not attached, a dust cap is provided. EXT DR (External Drive) is a threaded SMA (3 mm) connector for accepting drive signal inputs to the module.
OPERATING INFORMATION cont’d Table 2-1. Menu Keys for the 133/130 Module.
OPERATING INFORMATION cont’d {MODE} The Mode menu for the 106C/155/130 has all four selections available: Pulse, Impulse, CW and External Modulation. Pulse Mode can operate over the entire timing range of the 6040, producing flattopped delayed pulses. The Delay interval, Peak level. Baseline level and pulse Width are all adjustable.
OPERATING INFORMATION cont’d {LEVEL} All four Level parameter menu selections are available for this module: Peak Level, Baseline Level, External Modulation Level and CW Level. Peak and Baseline Levels select the high and low power levels in Pulse Mode operation. These levels may be set to zero or they may be adjusted between 30 µW and 1 mW in 3 MW steps (levels between zero and 50 µW may be selected but output characteristics are not guaranteed).
SECTION 3 THEORY OF OPERATION GENERAL Module Interface Figure 3-1 shows a simplified block diagram of the Module Interface board. The path for communication between mainframe and module is via PS. The eight QAD lines and five QA lines are the bus interface lines, and a MOD DIS line is used for disabling the Output board. Power is also delivered by P8. The address demultiplexer and select logic circuitry decodes the bus signals and selects one of the other blocks. The I.D.
THEORY OF OPERATION The two current sources are used for different Modes. The current source on the left is used during Pulse and Impulse Modes (to supply the Peak level), and during the External Modulation Mode. This current source can be modulated from a wideband preamp which is driven by the front panel SMA connector EXT MOD. The current is switched to the laser by SI, as determined by the DIGITAL DRIVE SELECT and the drive signals.
THEORY OF OPERATION Table 3-1. Plug-In Module Memory Map Memory Range C000-C777 Z3, I.D.
THEORY OF OPERATION This includes the Modes that are valid, parameter boundaries, and the type of output that the module has (optical or electrical). It also contains the values for initializing the nonvolatile RAM. Z4 is a 2K byte nonvolatile RAM (NVRAM). It is used to save instrument settings and power-on conditions. Z5 is a configurable Parallel Peripheral Interface 1C set up to allow 16 bits of output and eight bits of input.
THEORY OF OPERATION Table 3-2 shows how these digital control signals affect the condition of the analog switches in each Mode. The switches are identified by their control terminals (e.g., Z14-9); "L" and "H" indicate low and high logic/voltage levels. By turning on and off these switches, these digital signals provide proper routing for BASELINE LEVEL and PEAK LEVEL, the analog signals that control the amplitude at the laser output.
THEORY OF OPERATION The path of the CW OR BASELINE LEVEL signal may be followed on schematic sheet 1. First, we note that the PEAK LEVEL control voltage is inverted by Z13-1 and delivered to Z16-3 via R20. Second, we determine the status of the switches that affect the CW OR BASELINE LEVEL signal. Z11-3, for example, is connected to three such switches. From Table 3-1 it is seen that its control signal is IMPULSE from Z9-2, and that it is high in the CW Mode. Thus, Z9-3 is not conducting.
THEORY OF OPERATION Analog Switches Z14-1 H L H H H BIAS Z14-8 L L H H L CW + EM Z14-9 H H L L H CW + EM Z14-16 H H L H H CW Z11-1 H H H H L IMPULSE Z11-8 H H H H L IMPULSE In summary, the PEAK LEVEL control voltage is inverted about ground by Z13-1 and also undergoes a gain reduction of six (-6 V from PEAK LEVEL becomes +1 V at Z13-1).
THEORY OF OPERATION Pulse Mode In Pulse Mode, two conditions exist: the circuitry involved when the Baseline level is set to zero is different from the circuits used with a nonzero Baseline. In Pulse Mode with zero Baseline, there is no optical output between pulses (during a logical "zero" there is zero light output). The upper level is set by the PEAK LEVEL control voltage which, in turn, determines the amount of current switched into the laser.
THEORY OF OPERATION PREDRIVE, the timing signal from the multiplexer (Z4), is applied (from Z3-2) to the base of predriver Q4. Q4 and Q3 are a switching pair whose current is controlled by Z2-1 and Q3. The predrive current through Q4 and 03 increases with increasing optical output and, as the current increases, the main drivers Q6 and Q7 receive larger switching voltages. This is achieved by utilizing a current source.
THEORY OF OPERATION Since it is desired to stabilize the Baseline level only, a signal proportional to the duty factor is required. This signal is obtained from Z3-2 (via R163). Both signals are sent to the auxiliary feedback loop. The IMPULSE COMPENSATION and IMPULSE FEEDBACK signals (sheet 1) are combined in Z6 along with a dc level from R37 and are sent back (via Z11-3 and Z8-1) to the Baseline current source (Q1, sheet 2).
SECTION 4 MAINTENANCE AND CALIBRATION MAINTAINENCE Light Output Connector For satisfactory performance, proper care in the use of the optical components is necessary. There must be no contamination to interfere with the passage of light through the fiber end connections and the bulkhead connector. The following procedures should be observed. 1. Minimize the number of times connecting and disconnecting the optical cable. 2. Keep the connectors absolutely clean. 3.
MAINTENANCE AND CALIBRATION • BNC terminated 30 ohm coaxial cables, 1 meter length. • Variable dc voltage source (capable of ±3 V into 30 ohms). • Single-mode optical fiber patch cord terminated with appropriate connectors.. PROCEDURE Note: This calibration should be carried out in the order presented. Before starting, verify that the power supply voltages are at their nominal levels (+12 V ±0.1 V, -12 V ±0.1 V, +5 V ±0.05 V, and -5-2 V ±0.05 V) with the Module plugged in.
MAINTENANCE AND CALIBRATION CW and External Modulation Calibration Using the patch cord, connect LIGHT OUT to the 6100 Optical Power Meter. Set the 6100 for Average power measurement and the 0 dBm range. Set the 6040 Mode to CW and the CW level to 1.000 mW If necessary, adjust R11 (Schematic 133-31, sheet 1) to obtain a reading of 1.000 mW ±10 µW on the 6100. Set the CW level for 100 µW and verify the output to be within 10 µW.
MAINTENANCE AND CALIBRATION Pulse Dynamic Characteristics Connect the 6040 TRIG OUT to the External Trigger input of the oscilloscope (bandwidth must be at least 1 GHz). Connect the 6040 LIGHT OUT to the detector (also 1 GHz). Connect the detector's output to channel A of the oscilloscope. With the 6040 still in Pulse Mode, set the Peak level to 1.000 mW and the Baseline level to 100 µW. Set TRIG for Internal Trigger, 100 kHz. Set Timing for a Width of 40 ns.
SECTION 5 PARTS LIST AND SCHEMATICS Abbreviations CER COMP DIP ELEC FAC SEL K M MF MIC MONO Ceramic Composition Dual Inline Package Electrolytic Value Set at Factory Kilohm Megohm Metal Film Mica Monolithic Ceramic PF SIP TAN UH UF V VAR W WW Pico farad Single Inline Package Tanalum Microhenry Microfarad Working Volts Variable Watts Wire wound --------------------------- NOTE ----------------------------The number in the second column is the BERKELEY NUCLEONICS re-order number --------------------------
PARTS LIST AND SCHEMATICS C46 C47 C48 C49 NOT USED NOT USED NOT USED NOT USED C50 C51 C52 C53 C54 NOT USED NOT USED 110-019 0.05 µF 20% 25 VCER 110-021 0.01 µF 20% 16 VCER 110-033 0.01 µF 20% 50 V CER MONO C55 C56 C57 C58 110-033 110-011 110-034 110-019 0.01 µF 20% 50 V CER MONO 0.001 µF 10% 1KV CER 100PF ±10% 25 V CER 0.05 µF 20% 25 V CER C59 C60 C61 C62 C63 122-015 110-034 110-011 110-021 110-019 33 µF 10% 35 V TAN 100 PF ±10% 25 V CER 0.001 µF 10% 1 KV CER 0.01 µF 20% 16 V CER 0.
PARTS LIST AND SCHEMATICS R9 R10 R11 R12 R13 213-301 300 OHMS 5% 1/4 W COMP 213-332 33 K 5% 1/4 W COMP 244-035 2 K MULTITURN NOT USED NOT USED R54 R55 R56 R57 R58 NOT USED NOT USED 222-026 110 K 1/% 1/4 W MF 222-026 110 K 1/% 1/4 W MF 244-011 1 K MULTITURN R14 R15 R16 R17 R18 NOT USED NOT USED NOT USED 222-022 4.99 K 1% 1/4 W MF 222-045 4.
R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 213-102 213-102 244-038 231-008 222-050 213-103 214-510 214-470 214-470 213-103 1K 5X 1/4 W COMP 1 K 5% 1/4 W COMP 5 K MULTI TURN 2 OHM 1% 10 WWW 8.
MODULE INTERACE BD 6040-4 649-143 C1 C2 C3 C4 C5 C6 C7 122-016 122-016 122-014 122-014 110-033 110-033 110-033 10UF±10% 15 V TAN 10UF±10% 15 V TAN 33UF±10% 6 V TAN 33UF±10% 6 V TAN 0.1UF±20% 50 V CER MGNO 0.1 UF±20%50V CER MONO 0.1 UF±20%50V CER MONO R1 R2 R3 R4 R5 R6 R7 223-010 223-016 244-011 244-011 244-011 244-011 222-018 C8 C9 C10 C11 C12 C13 110-033 110-033 110-033 110-033 110-033 110-033 0.1 UF±20%50V CER MONO 0.1 UF±20%50 V CER MONO 0.1 UF±20%50V CER MONO 0.1 UF±20%50V CER MONO 0.
