Stanford Research Systems SR560 Owner's Manual
  1. Manuals
  2. Brands
  3. Stanford Research Systems Manuals
  4. Amplifier
  5. SR560
  6. Owner's manual

Stanford Research Systems SR560 Owner's Manual

Low-noise preamplifier
Hide thumbs Also See for SR560:
Table of Contents

Advertisement

Quick Links

See also: Manual
MODEL SR560
LOW-NOISE PREAMPLIFIER
1290-D Reamwood Avenue
Sunnyvale, CA 94089 U.S.A.
(408) 744-9040
Copyright © 1989, 1990, 1997, 1999
Stanford Research Systems
All Rights Reserved.
Revision 2.8
(12/2006)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SR560 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Stanford Research Systems SR560

Summary of Contents for Stanford Research Systems SR560

  • Page 1 MODEL SR560 LOW-NOISE PREAMPLIFIER 1290-D Reamwood Avenue Sunnyvale, CA 94089 U.S.A. (408) 744-9040 Copyright © 1989, 1990, 1997, 1999 Stanford Research Systems All Rights Reserved. Revision 2.8 (12/2006)

  • Page 3: Table Of Contents

    Ventilation Power-Up Repackaging for Shipment Use in Biomedical Applications Warning Regarding Use with Photomultipliers Accessories Furnished Environmental Conditions Symbols Specifications SR560 Low Noise Preamplifier Specifications Chart Operation and Controls Front Panel Operating Summary Power Source Filters Gain Mode Gain Output...
  • Page 4 Johnson Noise '1/f' Noise Others Non-Essential Noise Sources Capacitive Coupling Inductive Coupling Resistive Coupling ('Ground Loops') Microphonics Thermocouple Effect SR560 - Component List Front Panel Board Main Board Miscellaneous Parts PCB - SR560 Revision F (9/89) Schematics E-1 to E-10 C-13...

  • Page 5: Introduction And Setup

    DC to 1 MHz. The user can choose high dynamic reserve or low noise settings, and can invert the output relative to the input. The SR560 normally operates with a fully floating ground and can be viewed as an "in-line- Figure 1: SR560 Block Diagram BNC amplifier"...

  • Page 6: Preparation For Use

    The internal batteries are charged as long as AC power is connected. The SR560 can operate from a 100 V, 120 V, 220 V or 240 V nominal AC power source having a line frequency of 50 or 60 Hz.

  • Page 7: Repackaging For Shipment

    PMT can charge to several hundred volts in a relatively short time. If this cable is connected to the inputs of the SR560, the stored charge may damage the front-end FETs. To avoid this problem, provide a leakage path of about 100 kΩ...

  • Page 9: Specifications

    SR560 LOW-NOISE PREAMPLIFIER SPECIFICATIONS CHART Inputs Single-ended or true differential Impedance 100 MΩ + 25 pF, DC-coupled Maximum Inputs 1 VDC before overload; 3 V peak to peak max AC coupled; protected to 100 VDC Maximum Output 10 Vpp Noise <4 nV/√Hz at 1 kHz...
  • Page 10 SPECIFICATIONS...

  • Page 11: Operation And Controls

    All front panel functions can be controlled through the rear-panel RS-232 interface. Power The SR560 is turned on by depressing the POWER switch. When disconnected from AC power, the unit will operate for approximately 15 hours on internal sealed lead-acid batteries.

  • Page 12: Filters

    "AMP GROUND" and "CHASSIS GROUND" banana jacks on the rear panel of the SR560. When connected to AC power, the chassis of the unit is always connected to the grounding conductor of the AC power cord.

  • Page 13: Gain Mode

    RS-232. The BLANK LED indicates the optoisolated BLANKING input (on the rear panel of the SR560) is active. The SR560 responds to a blanking input by internally grounding the amplifier signal path after the front end and...

  • Page 14: Rear Panel Operating Summary

    REAR PANEL OPERATING SUMMARY The SR560 rear panel is pictured in Figure 3. Various interface and power connectors are provided, along with fuses and charger status LEDs. AC Power Input The power entry module contains the receptacle for the AC line cord and fuse.

  • Page 15: Blanking Input

    "maintain" charge condition indefinitely, and will suffer no degradation from prolonged charging. The sealed lead-acid batteries used in the SR560 differ in this respect from nickel-cadmium batteries, which do suffer shortened lifetimes due to overcharging. The sealed lead-acid batteries will provide...
  • Page 16 • KEEP THE BATTERIES COOL When not in use, the SR560 should be stored in a cool, dry place with the batteries fully charged. This reduces the self-...

  • Page 17: Circuit Description

    CONFIGURABLE FILTERS AND GAIN The two filter stages in the SR560 each consist of 16 R-C filters which can be configured as either high pass or low pass by a relay. In the following description, part references in parentheses refer to filter two.

  • Page 18: Overload Detection

    RS-232 port. The SR560 uses a 16 K x 8 CMOS EPROM, (U504) containing system firmware and calibration bytes, along with a...

  • Page 19: Power Regulators

    REAR PANEL INTERFACES Two optically isolated rear panel interfaces are provided on the SR560. The blanking input accepts a TTL-level signal and grounds the amplifier signal path after the front end for as long as the input is held high.

  • Page 20: Batteries And P.e.m

    BATTERIES AND P.E.M. The batteries used in the SR560 are of sealed lead-acid construction. There are three 12 V, 1.9 amp-hour batteries, two of which serve as the positive power supply, and one of which serves as the negative power supply. Powering the SR560 alone, battery life should be greater than 20 hours.

  • Page 21: Calibration And Repair

    OFFSET ADJUSTMENT The SR560's front-panel offset adjustment provides an easy way for the user to null the amplifier's DC offset. Use the COUPLING pushbutton to light the GND LED. Now, regardless of the SOURCE setting, the input to the amplifier is grounded internally.

  • Page 22: Sr560 Offset Adjustment Procedure

    SR560. 5. Adjust P103 for zero volts on the 50 ohm output, using the oscilloscope. 6. Set the SR560 gain = 1000 and Source to "A-B''. 7. Set the function generator to square wave, Freq = 1 KHz, amplitude = 500mV pp.

  • Page 23: Noise Contours

    CALIBRATION AND REPAIR The other two fuses are in-line with the batteries. These fuses will blow if the rear panel ±12 VDC supplies are shorted, or if the unit sources or draws excessive current to or from the batteries. NOISE CONTOURS The noise contours (shown upper right) plot the noise figure as a function of source impedance and frequency.

  • Page 24: Input Voltage Noise

    The figure below shows the dynamic reserve (and maximum input signal without overload) for a SR560 set to a gain of 1000, the high pass filter set to 1 kHz and the low pass filter set to 10 kHz (for a bandpass from 1 kHz to 10 kHz).
  • Page 25 CALIBRATION AND REPAIR Gain Input Noise Maximum (nV/√ Hz ) DR (dB 0) 10, LN 10, HDR 20, LN 20, HDR 50, LN 50, HDR 100, LN 100, HDR 200, LN 200, HDR 500, LN 500, HDR 1000, LN 1000, HDR Gain 2000, LN 2000, HDR...
  • Page 26 CALIBRATION AND REPAIR...

  • Page 27: Remote Programming

    REMOTE PROGRAMMING Introduction The SR560 is equipped with a standard DB- 25 RS-232C connector on the rear panel for remote control of all instrument functions. The interface is configured as listen-only, 9600 baud DCE, 8-bit, no parity, 2 stop bits, and is optically isolated to prevent any noise or grounding problems.
  • Page 28 APPENDIX A A - 2...

  • Page 29: Noise Sources And Cures

    NOISE SOURCES AND CURES Noise, random and uncorrelated fluctuations of electronic signals, finds its way into experiments in a variety of ways. Good laboratory practice can reduce noise sources to a manageable level, and the lock-in technique can be used to recover signals, which may still be buried in noise.

  • Page 30: Capacitive Coupling

    ways which these noise sources work their way into an experiment. Capacitive Coupling A voltage on a nearby piece of apparatus (or operator) can couple to a detector via a stray capacitance. Although C very small, the coupled in noise may still be larger than a weak experimental signal.

  • Page 31: Resistive Coupling ('Ground Loops')

    Resistive Coupling (or ‘Ground Loops’) Currents through common connections can give rise to noise voltages. Resistive Coupling Here, the detector is measuring the voltage across the experiment, plus the voltage due to the noise current passing through the finite resistance of the ground bus. This problem arises because we have used two different grounding points, which are not at exactly the same potential.
  • Page 32 APPENDIX B...

  • Page 33: Front Panel Parts List

    Front Panel Parts List REF. SRS part# VALUE 3-00884-306 3-00012-306 GREEN 3-00012-306 GREEN 3-00012-306 GREEN 3-00012-306 GREEN 3-00012-306 GREEN 3-00012-306 GREEN 3-00012-306 GREEN 3-00012-306 GREEN D 10 3-00885-306 YELLOW D 11 3-00012-306 GREEN D 12 3-00012-306 GREEN D 13 3-00012-306 GREEN D 14 3-00012-306...

  • Page 34: Main Board

    2-00031-201 D6-01-05 SW12 2-00031-201 D6-01-05 3-00303-340 74HC164 3-00303-340 74HC164 3-00303-340 74HC164 3-00303-340 74HC164 3-00303-340 74HC164 7-00223-701 SR560-XX Main Board Parts List REF. SRS part# VALUE 6-00050-612 GB1219-36 6-00050-612 GB1219-36 6-00050-612 GB1219-36 C 101 5-00098-517 C 102 5-00098-517 C 103 5-00098-517...
  • Page 35 C 112 5-00023-529 C 113 5-00100-517 2.2U C 114 5-00100-517 2.2U C 115 5-00100-517 2.2U C 116 5-00005-501 150P C 201 5-00019-501 C 202 5-00100-517 2.2U C 203 5-00100-517 2.2U C 204 5-00100-517 2.2U C 205 5-00100-517 2.2U C 206 5-00100-517 2.2U C 208...
  • Page 36 C 319 5-00033-520 C 320 5-00033-520 C 321 5-00031-520 220U C 322 5-00031-520 220U C 323 5-00232-520 470U C 324 5-00232-520 470U C 325 5-00023-529 C 326 5-00023-529 C 327 5-00192-542 22U MIN C 328 5-00192-542 22U MIN C 330 5-00100-517 2.2U C 401...
  • Page 37 C 804 5-00225-548 .1U AXIAL C 805 5-00225-548 .1U AXIAL C 806 5-00225-548 .1U AXIAL C 807 5-00225-548 .1U AXIAL C 808 5-00023-529 C 809 5-00225-548 .1U AXIAL C 810 5-00023-529 C 811 5-00225-548 .1U AXIAL C 812 5-00225-548 .1U AXIAL C 813 5-00225-548 .1U AXIAL...
  • Page 38 D 705 3-00011-303 D 706 3-00062-340 KBP201G/BR-81D D 707 3-00226-301 1N5822 D 708 3-00226-301 1N5822 D 709 3-00306-340 LM385BZ-2.5 D 710A 3-00391-301 MBR360 D 710B 3-00391-301 MBR360 D 711 3-00198-301 1N5231B D 801 3-00226-301 1N5822 D 802 3-00004-301 1N4148 D 803 3-00004-301 1N4148 J 101...
  • Page 39 Q 703 3-00374-329 MTP20P06 Q 801 3-00376-329 MTP5N05 4-00616-453 49.9 R 101 4-00306-407 100M R 102 4-00306-407 100M R 103 4-00030-401 R 104 4-00030-401 R 105 4-00030-401 R 106 4-00030-401 R 108 4-00169-407 R 109 4-00041-401 R 110 4-00141-407 R 111 4-00217-408 1.000K R 112...
  • Page 40 SR560 COMPONENT PARTS LIST R 212 4-00600-407 15.8K R 213 4-00600-407 15.8K R 214 4-00030-401 R 215 4-00165-407 R 216 4-00030-401 R 217 4-00325-407 R 218 4-00030-401 R 219 4-00030-401 R 220 4-00296-407 R 221 4-00165-407 R 222 4-00165-407 R 223 4-00140-407 10.2K...
  • Page 41 SR560 COMPONENT PARTS LIST R 403 4-00325-407 R 404 4-00165-407 R 405 4-00030-401 R 406 4-00030-401 R 407 4-00030-401 R 408 4-00317-407 R 409 4-00296-407 R 410 4-00165-407 R 411 4-00165-407 R 412 4-00296-407 R 413 4-00165-407 R 415 4-00165-407...
  • Page 42 SW601 2-00008-207 SPSTX4 SW801 2-00023-218 DPDT 6-00067-610 SR560 Resistor, Carbon Film, 1/4W, 5% Resistor, Metal Film, 1/8W, 1%, 50PPM Resistor, Metal Film, 1/8W, 1%, 50PPM Resistor, Carbon Film, 1/4W, 5% Resistor, Carbon Film, 1/4W, 5% Resistor, Carbon Film, 1/4W, 5%...
  • Page 43 U 101 3-00371-340 DG444 U 102 3-00382-340 OPA37 U 103 3-00090-340 LF411 U 104 3-00385-340 74HC4053 U 105 3-00297-340 LT1028 U 106 3-00246-340 NPD5564 U 201 3-00382-340 OPA37 U 202 3-00270-340 74HC4051 U 203 3-00270-340 74HC4051 U 204 3-00189-340 LF356 U 205 3-00371-340 DG444...
  • Page 44 U 801 3-00112-329 7805 U 802 3-00307-340 LM2940T-10 U 803 3-00090-340 LF411 U 804 3-00250-340 PS2501A-2 0-00014-002 0-00017-002 TRANSCOVER 0-00042-010 4-40 HEX 0-00043-011 4-40 KEP 0-00048-011 6-32 KEP 0-00077-030 3/16"X5/16"NYLN 0-00079-031 4-40X3/16 M/F 0-00089-033 4" 0-00096-041 #4 SPLIT 0-00109-050 1-1/2" #18 0-00111-053 1-3/4"#24B 0-00122-053...

  • Page 45: Miscellaneous Parts

    1-00127-177 .062" DIAM 1-00128-171 20 COND 4-00541-435 130V/1200A 5-00027-503 .01U 6-00004-611 1A 3AG 6-00074-611 3A 3AG 7-00194-715 PS300-38 7-00201-720 SR500-32 7-00222-701 SR560-XX 7-00232-709 SR560-4 7-00251-720 SR560-21 7-00252-720 SR560-23-25 7-00257-720 SR560-20 7-00258-720 SR560-26 7-00680-720 PS300-52 7-00795-720 BATTERY PAN 7-00796-720 BATTERY RETAINR 9-00127-907 1/2"...
  • Page 46 SR560 COMPONENT PARTS LIST C-14...

Table of Contents

Save PDF