1. Manuals
  2. Brands
  3. SRS Labs Manuals
  4. Cash Counter
  5. SR400
  6. Manual

SRS Labs SR400 Manual

Gated photon counter
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
MODEL SR400
GATED PHOTON COUNTER
1290-D Reamwood Avenue
Sunnyvale, California 94089
Phone: (408) 744-9040 • Fax: (408) 744-9049
email: info@thinkSRS.com • www.thinkSRS.com
Copyright © 1987
–
2018 by SRS, Inc.
All Rights Reserved.
Revision 2.7 (11/2018)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SR400 and is the answer not in the manual?

Questions and answers

Summary of Contents for SRS Labs SR400

  • Page 1 MODEL SR400 GATED PHOTON COUNTER 1290-D Reamwood Avenue Sunnyvale, California 94089 Phone: (408) 744-9040 • Fax: (408) 744-9049 email: info@thinkSRS.com • www.thinkSRS.com Copyright © 1987 – 2018 by SRS, Inc. All Rights Reserved. Revision 2.7 (11/2018)

  • Page 3: Table Of Contents

    Table of Contents TABLE OF CONTENTS Command Syntax CONDENSED INFORMATION Safety and Preparation for Use Status LED's Specifications RS-232 Echo Try-out with ASCII Terminal Menu Display List Abridged Command List Detailed Command List Mode Levels INSTRUMENT OVERVIEW Signal Inputs / Discriminators Gates Counting Front Panel...
  • Page 4 Plateauing a PMT Power Supply The 'Correct' Way Miscellaneous The 'Fast and Pretty Good' Way SCHEMATIC DIAGRAMS TYPICAL EXPERIMENT Signal Amplifiers SR400-1 Energy Levels of Ruby Discriminators SR400-2 Apparatus Fast Counters A and B Prescallers SR400-3 Operation Fast Counters T Prescaller...

  • Page 5: Safety And Preparation For Use

    LINE VOLTAGE SELECTION outlet which has a properly connected protective ground. The SR400 operates from a 100V, 120V, 220V, or 240V nominal ac power source having a line WARNING REGARDING USE WITH frequency of 50 or 60 Hz. Before connecting the...
  • Page 6 SRS Symbols Symbols that may be found on SRS products...

  • Page 7: Specifications

    SR400 Specifications SR400 SPECIFICATIONS Protection: 15 Vdc, 100 V for 1 µs OVERVIEW There are three complete counters identified as A, B, and T. All counters count up to 200 MHz. GATE GENERATORS There are two independent gates, AGATE and BGATE, which enable the A and B counters.
  • Page 8 SR400 Specifications The STOP key terminates the current count period D/A OUTPUT The front panel D/A Output is proportional to A, and pauses the scan. If scanning, gates and disc B, A-B, or A+B depending upon the counting levels are held at their last value. The STOP key pressed while in a paused condition will reset the mode selected.

  • Page 9: Menu Display List

    Menu Display List MENU DISPLAY LIST MODE A GATE B GATE ∆=1.000 µs ∆=1.000 µs COUNT=A,B FOR T PRESET AGATE=SCAN BGATE=SCAN A=INPUT 1 A DELAY=1.000 µs B DELAY=1.000 µs B=INPUT 2 B SET=1E3 A WIDTH=1.000 µs B WIDTH=1.000 µs T=10MHZ T SET=1E0 s N PERIODS=2000 [at 1234] AT N=STOP...
  • Page 10 Menu Display List...

  • Page 11: Abridged Command List

    Abridged Command List ABRIDGED COMMAND LIST The parameter i is 0,1,or 2 to select counter A,B, or T MODE CM j Set COUNT to mode j; A,B(0), A-B(1), A+B(2) for preset T,or A FOR B preset(3). CI i,j Set counter i to input j; 10 MHz(0), INP 1(1), INP 2(2), TRIG(3). CP i, n Set counter i preSET to 1 <= n <= 9E11.
  • Page 12 Abridged Command List STORE/RECALL ST m Store instrument settings to location m (1 to 9). RC m Recall instrument settings from location m (1 to 9). RC 0 Recall default settings. INTERFACE Clear instrument. SV m Set GPIB SRQ mask to 0 <= m <= 255. Read status byte.

  • Page 13: Instrument Overview

    Instrument Overview INSTRUMENT OVERVIEW SR400 OVERVIEW SIGNAL INPUTS AND DISCRIMINATORS The SR400 architecture is diagrammed above. There are two independent analog signal inputs There are three fast counters identified as counters labelled INPUT 1 and INPUT 2. They are internally terminated into 50 Ω. The inputs can A, B, and T.

  • Page 14: Counting

    B GATE. This is for gated ratio or with selectable step size. reciprocal counting. The SR400 may be programmed to cycle through COUNTING 1 to 2000 COUNT PERIODS in a single scan. At Each counter's input may be selected from a the end of the programmed scan, the counters may be stopped or the scan may be restarted.

  • Page 15: Gating

    Instrument Overview is START, the next EXTERNAL START begins from the GATE outputs. The gates are open when the outputs are low. The gate outputs have a the first COUNT PERIOD of the next scan. timing accuracy with respect to the discriminator outputs of 2 ns.

  • Page 16: Count Modes

    Instrument Overview source compensated. If the DWELL mode is intensity, then the COUNT PERIOD will adjust EXTERNAL, an EXTERNAL START pulse starts for fluctuations in the source. Counter A measures counting and an EXTERNAL STOP pulse stops the ratio of its mean input rate and the mean rate counting.
  • Page 17 Instrument Overview The front panel D/A output provides an analog output proportional to A, B, A-B, or A+B depending on the counting mode. The scale may be logarithmic (1V/decade) or linear to any 3 digits. If a chart recorder is used, the D/A output should drive the Y axis.
  • Page 18 Instrument Overview...

  • Page 19: Measurement Examples

    After the dwell period, the counter will reset to 0 counts, re-arm and repeat the measurement. After 10 measurement cycles, the SR400 will stop counting and disarm. You will need a 10 kHz signal source and a 0.5 Hz square wave generator for this example.
  • Page 20 Measurement Examples 1. Turn the SR400 off. Hold down the STOP (RESET) button while turning the SR400 on. Wait three seconds and release the button. 2. Press the MODE key. Using the four arrow keys and the front panel knob, select the following parameters.
  • Page 21 This example is a variation of Example 2, but requires no additional trigger pulses to begin the DWELL PERIOD. In this example, the SR400 is programmed to make 10 counting measurements of a 10 kHz pulse train. The counting gates, each 500 ms wide, are delayed 300 ms from external triggers arriving at a 1 Hz rate.
  • Page 22 Measurement Examples 1. Turn the SR400 off. Hold down the STOP (RESET) button while turning the SR400 on. Wait three seconds and release the button. 2. Press the MODE key. Using the four arrow keys and the front panel knob, select the following parameters.

  • Page 23: Front Panel Summary

    The SR400 is turned on by depressing the individual parameters within each menu. The POWER button. All instrument settings are stored selected parameter is displayed on the menu line in nonvolatile memory and are retained when the of the display.

  • Page 24: Instrument Status

    Guide to Operation In general, pressing the STOP key twice in A FOR B PRESET, the T SET LED is on succession puts the counters into the reset otherwise. condition. INPUTS START begins the first COUNT PERIOD of the programmed scan. If the DWELL time is The rising or falling edge of the TRIGGER input triggers the gate generators.
  • Page 25 Guide to Operation DISC output should just be terminated at the front panel. The GATE outputs are 50 Ω, NIM level, outputs showing the actual gates to counters A and B. The GATE outputs are low (-.7 V) during the gate. The timing accuracy between the GATE outputs and DISC outputs is 2 ns.

  • Page 26: Rear Panel Summary

    X axis of a recorder or scope during scans. Output impedance is < 1 Ω and the maximum current to control the SR400 via the IEEE-488 or GPIB instrument bus. The address of the instrument is output is 10 mA.

  • Page 27: Front Panel Menus

    Guide to Operation - Menus FRONT PANEL MENUS The lower line of the LCD display is the menu whether the count data measures rate, ratio, or line. Menu lines are grouped into six menus. To reciprocal. select a new group or menu, press a new menu key.
  • Page 28 Guide to Operation - Menus The input to counter T can be the internal 10 MHz parameters updated. The DWELL OUTPUT is timebase (rate measurement), the signal at INPUT TTL high during the DWELL time. 2 discriminated by T discriminator (ratio or reciprocal measurement), or the TRIGGER input If AT N=START, the counters will wait one discriminated...

  • Page 29: Level Menu

    Guide to Operation - Menus COUNT is A,B FOR T PRESET, then the D/A discriminated trigger pulses may be viewed output can follow either A or B. through the T DISC output when counter T is preset and its input is TRIG. This can be helpful in selecting a trigger level.
  • Page 30 Guide to Operation - Menus the fixed threshold when A DISC is FIXED and B DISC LVL = -10.0 mV the starting level when A DISC is SCANned. : -11.0 mV When the A DISC mode is SCAN and a scan is in The threshold level of B discriminator may be progress, this line displays the current position of adjusted from -300 mV to + 300 mV.
  • Page 31 Guide to Operation - Menus The step size may also be changed during a scan. When the PORT1 mode is SCAN and a scan is in The new step size will be in effect at the end of the progress, this line displays the current position of next count period.

  • Page 32: Gate Menus

    Guide to Operation - Menus If the gate delay is scanned, then the right hand GATE MENUS parameter is the step size. At the end of each count period in a scan, the delay is incremented by one The A GATE and B GATE are identical in step size.

  • Page 33: Setup Menu

    Guide to Operation - Menus number of scan steps needed to exceed the command. SETUP and COM parameters are resolution. In all cases, the delay only steps from stored on power down as part of the current setup one allowed value to another and is as close to the only.
  • Page 34 0 to 25. The default value is 6 and should be set to a smaller value whenever possible. RS-232 ECHO= To control the SR400 from a terminal, the ECHO feature is turned ON. This causes the unit to echo back commands received over the RS-232 port. In...

  • Page 35: Instrument Setups

    Instrument Setups INSTRUMENT SETUPS The SR400 Photon Counter is a very flexible B WIDTH= 0.005 µs instrument capable of many modes of operation. This section illustrates some of the measurements LCD CONTRAST= that can be made. STORE= RECALL= DEFAULT SETUP / POWER ON CLEAR...

  • Page 36: Photon Pile Up Correction

    Instrument Setups PERIODS=10. Start a scan by pressing the photons which occur outside the time interval of interest. START key. The counter should cycle through 10 count periods separated by the dwell time (1 s). The display shows the current scan position in Assume that the pulse rate is a function of time as brackets.
  • Page 37 Instrument Setups background during the chopper open state and the other counts the background during the chopper closed state. The difference between the two counters is the signal. If A counter is the signal counter and B counter the background counter, the two gates should be timed as shown below.
  • Page 38 Instrument Setups...

  • Page 39: Remote Programming

    The RS-232 echo mode should be OFF if the SR400 is connected to a computer. It In general, if a command is sent without may ON if connected to a terminal.

  • Page 40: Status Led's

    SR400. A 'straight' RS-232 each value returned by the SR400. Thus, the cable is required since the SR400 is a DCE and the response to the command string CM;CI0;GD0<cr> while using the RS-232 non-echo mode would be terminal is a DTE.

  • Page 41: Detailed Command List

    Remote Programming – Command List DETAILED COMMAND LIST The two letters in each command sequence specify Input the command. The rest of the sequence consists of 10 MHz parameters. Multiple parameters are separated by a INPUT 1 comma. Those parameters shown in { } are INPUT 2 optional while those without { } are required.

  • Page 42: Levels

    Remote Programming – Command List data points completed so far during the current SD { j } scan and is shown in the brackets on the N If j = 1, the SD command sets the count display mode to HOLD. If j = 0, the display mode will be PERIODS menu line.

  • Page 43: Gates

    Remote Programming – Command List discriminator is in the FIXED mode. Changing the affect the level for the next count period and all scan step during a scan will affect the level for the those that follow. next count period and all those that follow. PL i { ,v } The PL command sets and reads thePORT1 and DL i { ,v }...

  • Page 44: Front Panel

    Below 1.000 µs, the resolution is 1 ns. Almost any value of t may be sent and the SR400 will round to 4 most significant digits resolution in 4th digit the nearest allowed value. If t is absent, the 1000 to 2048 1 (1001,1002,1003,...)
  • Page 45 Remote Programming – Command List TIME is EXTERNAL, the CS command will start a count period. A CH command may be sent to Mode terminate the count period. Local: all front panel controls are operative Remote: front panel controls are not Sending the CH command has the same effect as operative.

  • Page 46: Interface

    SW { m } is a read only command. The SW command sets and reads the RS-232 character wait interval. If m is included, the SR400 will wait m times 3.3 ms between characters sent INTERFACE over the RS-232 interface. This allows slow computer interfaces to keep up.

  • Page 47: Store/Recall

    = N The end-of-record required by the SR400 when PERIODS is the last data point. If m>2000 or receiving commands is not affected. The SE m=0, an error occurs.

  • Page 48: Examine Data

    If data points accumulate faster than they can be sent over the computer The SR400 maintains an 8-bit status register interface, they are buffered and sent as fast as the which the user may read to obtain information on interface allows.

  • Page 49: Secondary Status Byte

    2) substitute a human for the SR400 by using a The definitions for each bit of the status byte are null modem cable ( to make the DTE a DCE ) and...

  • Page 50: Common Software Problems

    2) Your computer's baud rate has been changed and no longer matches the SR400's baud rate. 3) The initial command sent to the SR400 was invalid due to a garbage character received during power-up, or, the first character in your computer's UART is garbage, also due to power-up.

  • Page 51: Interface

    DATA COMMUNICATIONS EQUIPMENT (DCE) where n1, n2, n3, and n4 are decimal values The SR400 is configured as DCE so that it may be between 0 and 255 corresponding to the ASCII codes of the desired termination characters. For connected directly to a terminal or IBM PC. If the...

  • Page 52: Microsoft Basic

    In this example, the IBM PC's serial port (known as COM1:) is used to communicate with the SR400. Only two wires between the IBM PC's COM1: port and the SR400 are needed (pins #2 & #3 of the 25 pin RS-232 connector), but pins 5,6,8, and 20 should be connected together on the connector at the IBM end.

  • Page 53: Microsoft Fortran

    To use these routines, the file 'for232.inc' (also on the demo disk) must be 'included' in the FORTRAN source. Only two wires between the IBM PC's COM1: port and the SR400 are needed (pins #2 & #3 of the 25 pin RS- 232 connector), but pins 5,6,8, and 20 should be connected together on the connector at the IBM end.
  • Page 54 SR400 with the RS-232 Interface reset PORT1 value to zero x=0.0 reset and start new count period call txstr('CR;CS$') read counter A data into string str1 call txstr('QA1$') call rxstr(str1) convert into integer variable n1 read(str1,1000) n1 1000 format (bn,i15) if data not ready yet, loop and try again if (n1.lt.0) goto 20...

  • Page 55: Gpib Capabilities

    COM/LOCAL key are only the language is different. The programs set up the SR400 to count 10 MHz on counter A for 1 disabled. The COM/LOCAL key will return the unit to the LOCAL state. The COM/LOCAL key second.

  • Page 56: Microsoft Basic

    The address is relative to the segment address specified by the DEF SEG statement preceding the CALL. In this program, the CEC card's ROM starts at C000H, the system controller's address is 21, and the SR400 is at GPIB address 23.
  • Page 57 SR400 with the GPIB Interface 390 X = X+.005 'INCREMENT PORT1 VALUE 400 IF X>10 THEN X=0 'RESET PORT1 AT 10 VOLTS 410 PRINT " PORT1 = "; X 420 P$=P1$ + STR$(X) 'MAKE PORT1 COMMAND STRING 430 CALL SEND(SR400%,P$,STATUS%):GOSUB 480...

  • Page 58: Microsoft C

    C program. Remember that the order of the arguments is REVERSED from the BASIC calls described in the manual. Example program to read the SR400 counter data and ramp the PORT1 analog output using Microsoft C v4.0 (large model) and the Capital Equipment Corp.
  • Page 59 /* init PORT1 value */ while (1) TxGpib(sr400,"CR;CS"); /* reset and start new count period */ TxGpib(sr400,"QA1"); /* read counter a data */ GetGpib(sr400); /* into result string */ /* scan result for long integer */ if (!(sscanf(result, "%D", &n1))) Statcheck(255);...
  • Page 60 SR400 with the GPIB Interface Statcheck(status); strcpy(temp, " "); /* clear result string */ receive(&status, &length, temp); /* get answer */ Statcheck(status); strcpy(result, temp); /* move answer into global result string */ /* ****************************************************** */ Statcheck(status) /* check GPIB status */ int status;...

  • Page 61: Troubleshooting

    STOP key. The data display should reset to 0. The fan in the SR400 is temperature controlled. Now press the DOWN key 3 more times to display When the unit is cold, the fan is off. When the internal temperature reaches about 30°...

  • Page 62: Counting

    10) The DWELL TIME is EXTERNAL and EXT START and STOP are disconnected or oscilloscope. Be sure to use equal length cables so as not to introduce timing skew. The connected to the wrong signal sources. timing accuracy of the outputs from the SR400 is 2 ns.

  • Page 63: Calibration And Repair

    Calibration and Repair CALIBRATION AND REPAIR Most of the calibration parameters are determined SIGNAL INPUT OFFSET by a computer aided calibration procedure after burn-in factory. These calibration To calibrate the input offset, connect a voltmeter parameters are stored in the permanent memory of to a signal input.
  • Page 64 Calibration and Repair...

  • Page 65: Using Photomultiplier Tubes

    Using Photomultiplier Tubes USING PHOTOMULTIPLIER TUBES will not be detected. The quantum efficiency is a PHOTOMULTIPLIER SELECTION FOR function of wavelength, so select the PMT for the PHOTON COUNTING best quantum efficiency over the wavelength region of interest. Photomultiplier Tubes (PMT's) are high-gain, low noise light detectors.

  • Page 66: Dark Counts

    Typical Experiment Conclusions: Select a PMT with a risetime < 3 ns CAUTION: Lethal High Voltages are used in and a current gain > 5 million. PMT applications. Use extreme caution when working with these devices. Only those experienced with high voltage circuits should DARK COUNTS attempt any of these procedures.
  • Page 67 Using Photomultiplier Tubes Current for the electron multiplier is provided by voltage on these stages from dropping as the output current is increased. the bias network. Current drawn from the bias network will cause the dynode potentials to change, and so change the tube gain. This problem (2) Use external power supplies for the last few is of special concern in lifetime measurements.

  • Page 68: Snubbing

    Typical Experiment are usually connected in series. ( See Figure B ) risetime less than this.) The other end of this cable is connected to the anode of the PMT, together with the output signal cable. Bypassing the dynodes of a PMT may cause high frequency ringing of the anode output signal.

  • Page 69: Pmt Base Conclusions

    (2) Bypass last dynodes pulsed The SR400 Photon Counter can detect pulses as applications. low as 2 mV. To allow for some adjustment of the (3) Use a snubber circuit to shape the output discriminator threshold and to provide better noise pulse.

  • Page 70: The 'Correct' Way

    Typical Experiment There are two reasons for carefully selecting the THE 'FAST AND PRETTY GOOD' WAY input discriminator level. The first is to improve signal-to-noise ratio setting This technique works very well and is particularly discriminator level above most of the noise pulses, suited for those who do not want to make a career but below most of the signal pulses.

  • Page 71: Typical Experiment

    Typical Experiment TYPICAL EXPERIMENT This experiment is typical of many photon used to quickly populate the excited state, and counting experiments. A pulsed light source is decays from the excited state are seen through a used to pump atoms to an excited state. Decays bandpass interference filter centered on Ruby's from the excited state are observed, allowing the 694.3 nm emission line.

  • Page 72: Instrument Configuration

    X-Y chart recorder to record the data. The chart The green LED is flashed at a 60 Hz rate for about recorder is interfaced to the SR400 via two D/A 500 µs. During this time, population integrates in outputs. The front panel D/A output has been set the upper level of the laser transition.
  • Page 73 Typical Experiment the photon counter mode, reads, displays and averaged to reduce statistical noise. When the data stores scan data, and can fit curves to experimental acquisition is complete, data reduction routines fit an exponential to the decay curve to determine the results.
  • Page 74 Typical Experiment...

  • Page 75: Microprocessor Control

    SR400 Circuit Description SR400 CIRCUIT DESCRIPTION The SR400 has five printed circuit boards. Almost GPIB INTERFACE (sheet 13) all of the components are located on the main circuit board, including the microprocessor and The GPIB (IEEE-488) interface is provided by the interfaces, fast counters and discriminators, gate TMS9914A controller, U1311.

  • Page 76: D/A Converter

    Typical Experiment are 2 address lines, chip select, power and ground, temperature compensated bias voltage for the and display contrast control. overload protection circuits which is adjusted by P101 to null the dc offset at the input. The electroluminescent backlight requires a 100 Vac, 100 Hz signal.

  • Page 77: T Counter

    SR400 Circuit Description from INPUT 1 and the signal A10MHZ_INH be preset, counter B's input is routed to counter T. 3/3 U305 buffers the input and drives the T_DISC disables input from the 10 MHz timebase. The output. TDISC_INH inhibits the T DISC output selected input is buffered by 4/4 of U301 to drive the A_DISC output drivers, Q301 and Q302.

  • Page 78: Gate Generators

    Typical Experiment clears the dwell latch, 2/2 U603, raising !COUNT DIGITAL DELAY (sheet 8) high again. This also resets and enables the dwell The discriminated trigger input clocks the trigger counters in U1308 to count down the programmed dwell time. During the first 1 ms of the dwell time, latch, 2/2 U405.

  • Page 79: Delay Reset

    SR400 Circuit Description by the processor. When the digital portion of the GATES (sheet 9) delay is complete, !DLYA_TIMEOUT goes low The EOD_A signal clocks the width latch 1/2 which causes the differential pair, Q702 and Q703, to switch the current away from the operational U902.
  • Page 80 Typical Experiment...
  • Page 81 SR400 Parts List Main Board Parts List REF # SRS Part # VALUE DESCRIPTION 6-00001-612 BR-2/3A 2PIN PC Battery C 101 5-00023-529 Cap, Monolythic Ceramic, 50V, 20%, Z5U C 102 5-00033-520 Capacitor, Electrolytic, 16V, 20%, Rad C 103 5-00023-529 Cap, Monolythic Ceramic, 50V, 20%, Z5U...
  • Page 82 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION C 701 5-00023-529 Cap, Monolythic Ceramic, 50V, 20%, Z5U C 702 5-00121-566 .0047U Cap, Polyester Film 50V 5% -40/+85c Rad C 703 5-00023-529 Cap, Monolythic Ceramic, 50V, 20%, Z5U C 704...
  • Page 83 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION C 1003 5-00023-529 Cap, Monolythic Ceramic, 50V, 20%, Z5U C 1004 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL C 1005 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad C 1006...
  • Page 84 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION C 1651 5-00023-529 Cap, Monolythic Ceramic, 50V, 20%, Z5U C 1652 5-00023-529 Cap, Monolythic Ceramic, 50V, 20%, Z5U C 1653 5-00023-529 Cap, Monolythic Ceramic, 50V, 20%, Z5U C 1654 5-00023-529...
  • Page 85 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION DS1411 3-00012-306 GREEN LED, Rectangular DS1501 3-00012-306 GREEN LED, Rectangular DS1502 3-00012-306 GREEN LED, Rectangular DS1503 3-00012-306 GREEN LED, Rectangular DS1504 3-00013-306 LED, Rectangular DS1505 3-00013-306 LED, Rectangular DS1506 3-00013-306...
  • Page 86 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION N 908 4-00369-421 120X3 Res. Network, SIP, 1/4W,2% (Isolated) N 911 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated) N 912 4-00262-425 100X7 Resistor Network SIP 1/4W 2% (Common) N 1001 4-00284-421 1.0KX4...
  • Page 87 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION Q 712 3-00022-325 2N3906 Transistor, TO-92 Package Q 713 3-00022-325 2N3906 Transistor, TO-92 Package Q 714 3-00027-325 2N5770 Transistor, TO-92 Package Q 715 3-00027-325 2N5770 Transistor, TO-92 Package Q 801...
  • Page 88 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION R 125 4-00088-401 Resistor, Carbon Film, 1/4W, 5% R 126 4-00079-401 4.7K Resistor, Carbon Film, 1/4W, 5% R 127 4-00322-407 Resistor, Metal Film, 1/8W, 1%, 50PPM R 128 4-00327-407 47.5...
  • Page 89 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION R 234 4-00030-401 Resistor, Carbon Film, 1/4W, 5% R 235 4-00030-401 Resistor, Carbon Film, 1/4W, 5% R 401 4-00045-401 2.0K Resistor, Carbon Film, 1/4W, 5% R 402 4-00045-401 2.0K Resistor, Carbon Film, 1/4W, 5%...
  • Page 90 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION R 807 4-00305-401 4.3K Resistor, Carbon Film, 1/4W, 5% R 808 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5% R 809 4-00305-401 4.3K Resistor, Carbon Film, 1/4W, 5% R 810 4-00215-407...
  • Page 91 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION R 1022 4-00038-401 Resistor, Carbon Film, 1/4W, 5% R 1023 4-00347-407 7.50K Resistor, Metal Film, 1/8W, 1%, 50PPM R 1024 4-00080-401 Resistor, Carbon Film, 1/4W, 5% R 1025 4-00031-401 Resistor, Carbon Film, 1/4W, 5%...
  • Page 92 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION U 307 3-00151-340 MC10125 Integrated Circuit (Thru-hole Pkg) U 308 3-00207-340 74F191 Integrated Circuit (Thru-hole Pkg) U 401 3-00206-340 MC10H102 Integrated Circuit (Thru-hole Pkg) U 402 3-00194-340 MC10H131 Integrated Circuit (Thru-hole Pkg)
  • Page 93 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION U 1201 3-00158-340 74HC154N Integrated Circuit (Thru-hole Pkg) U 1202 3-00039-340 74HC14 Integrated Circuit (Thru-hole Pkg) U 1203 3-00045-340 74HC32 Integrated Circuit (Thru-hole Pkg) U 1204 3-00155-340 74HC04 Integrated Circuit (Thru-hole Pkg)
  • Page 94 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION 0-00233-000 HANDLE1 Hardware, Misc. 0-00234-044 CLEAR 3 Window 0-00236-004 KN1751B1/4 Knobs 0-00241-021 4-40X3/16PP Screw, Panhead Phillips 0-00259-021 4-40X1/2"PP Screw, Panhead Phillips 0-00407-032 SOLDR SLV RG174 Termination 0-00418-000 CLIP, CABLE Hardware, Misc.

  • Page 95: Power Supply

    SR400 Parts List Power Supply Parts List REF # SRS Part # VALUE DESCRIPTION C 1601 5-00140-500 470U Capacitor, Misc. C 1602 5-00140-500 470U Capacitor, Misc. C 1603 5-00034-526 100U Capacitor, Electrolytic, 35V, 20%, Rad C 1604 5-00141-503 .22U Capacitor, Ceramic Disc, 50V, 20%, Z5U...
  • Page 96 SR400 Parts List REF # SRS Part # VALUE DESCRIPTION LR1604 6-00028-604 10UH Inductor, Vertical Mount LR1605 6-00028-604 10UH Inductor, Vertical Mount P 1601 4-00014-441 Pot, Multi-Turn Trim, 3/8" Square Top Ad Q 1601 3-00222-325 MPSA44 Transistor, TO-92 Package Q 1602...

  • Page 97: Miscellaneous

    SR400 Parts List REF # SRS Part # VALUE DESCRIPTION 0-00190-030 #8X1" Spacer 0-00200-043 #8 SHOULDER Washer, nylon 0-00208-020 4-40X3/8PF Screw, Flathead Phillips 0-00209-021 4-40X3/8PP Screw, Panhead Phillips 0-00231-043 #4 SHOULDER Washer, nylon 0-00243-003 TO-220 Insulators 0-00244-021 6-32X1-1/8PP Screw, Panhead Phillips...
  • Page 98 SR400 Parts List...

Table of Contents