MODEL SR560 LOW-NOISE PREAMPLIFIER
1290-D Reamwood Avenue
Sunnyvale, CA 94089 U.S.A.
(408) 744-9040albo
Copyright © 1989, 1990, 1997, 1999
Stanford Rearch Systems
All Rights Rerved.
Revision 2.8
(12/2006)
Introduction and Setupahri
Instrument Overview 1
Preparation for U 2
Voltage 2 Line
Line Fu 2
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Ventilation 2
Power-Up 2
Repackaging for Shipment 3
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layer
Warning Regarding U with Photomultipliers 3
Furnished 3 Accessories
Conditions 3 Environmental
Symbols 4
Specifications
SR560 Low Noi Preamplifier Specifications Chart 5
Operation and Controls
Front Panel Operating Summary 7 Power 7
Source 7
Filters 8 Mode 9 Gain
Gain 9
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Output 9
Ret 9
Status 9 Rear Panel Operating Summary 10 AC Power Input 10
Amplifier Power Output 10
Charger 10 Battery
Blanking
Input 11
Interface 11 RS-232
Battery Care and Usage 11 Recharging 11 Care 11 Battery
Circuit Description
Differential Low-Noi Front End 13
Configurable Filters and Gain 13
Output Stages 13
Overload Detection 14
Microprocessor 14
Battery Charger and Pre-regulators 14
Power Regulators 15
Rear Panel Interfaces 15
Batteries and P.E.M. 16
Front Panel 16
Calibration and Repair
Offt Adjustment 17
Calibration 17
Front End Replacement 17
SR560 Offt Adjustment Procedure 18
Battery Replacement 18
Fu Replacement 18
Noi Contours 19
Input Voltage Noi 20
Dynamic Rerve 20 Appendix A
Remote Programming A-1
Introduction A-1
Commands A-1 Appendix B
Noi Sources and Cures B-1 Intrinsic Noi Sources B-1
Noi B-1 Johnson
Noi B-1 '1/f'
yuxuanOthers B-1 Non-Esntial Noi Sources B-1
Capacitive
Coupling B-2
Coupling B-2 Inductive
Resistive Coupling ('Ground Loops') B-3
Microphonics B-3
Effect B-3 Thermocouple企业管理创新
SR560 - Component List
Front Panel Board C-1
Main Board C-2
Miscellaneous Parts C-13 PCB - SR560 Revision F (9/89)D-1 Schematics E-1 to E-10
INTRODUCTION AND SETUP
Figure 1: SR560 Block Diagram INSTRUMENT OVERVIEW
The SR560 architecture is diagrammed above. The instrument provides DC-coupled low-noi amplification of single-ended and true differential input signals at gains of 1 to 50,000. Two configurable R-C filters are provided to lectively condition signals in the frequency range from DC to 1 MHz. The ur can choo high dynamic rerve or low noi ttings, 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-BNC amplifier" with the amplifier ground isolated from the chassis and the AC power supply. Opto-isolated input blanking control and listen-only RS-232 interface lines are provided for instrument control. Digital noi is eliminated by shutting down the microprocessor's oscillator except during the short time required to alter the instrument's configuration, either through
a front-panel pushbutton or through an RS-232 command. Internal aled lead-acid batteries provide 15single是什么意思
hours of line-
