SRS Labs SIM980 Manuale operativo
Operation and Service Manual
Analog Summing Amplifier
SIM980
Stanford Research Systems
Revision 1.9 •August 28, 2006
Certification
Stanford Research Systems certifies that this product met its published specifications at the time
of shipment.
Warranty
This Stanford Research Systems product is warranted against defects in materials and workman-
ship for a period of one (1) year from the date of shipment.
Service
For warranty service or repair, this product must be returned to a Stanford Research Systems
authorized service facility. Contact Stanford Research Systems or an authorized representative
before returning this product for repair.
Information in this document is subject to change without notice.
Copyright c
Stanford Research Systems, Inc., 2005, 2006. All rights reserved.
Stanford Research Systems, Inc.
1290–D Reamwood Avenue
Sunnyvale, CA 94089 USA
Phone: (408) 744-9040 •Fax: (408) 744-9049
Printed in U.S.A. Document number 9-01591-903
SIM980 Analog Summing Amplifier
Contents
General Information iii
Symbols ............................. iv
Notation ............................. v
Specifications .......................... vi
1 Getting Started 1 – 1
1.1 Introduction to the Instrument . . . . . . . . . . . . . 1 – 2
1.2 Front-Panel Operation . . . . . . . . . . . . . . . . . . 1 – 2
1.3 SIMInterface........................ 1–4
2 Remote Operation 2 – 1
2.1 Index of Common Commands . . . . . . . . . . . . . . 2 – 2
2.2 Alphabetic List of Commands . . . . . . . . . . . . . . 2 – 4
2.3 Introduction ........................ 2–6
2.4 Commands......................... 2–6
2.5 StatusModel........................ 2–17
3 Performance Tests 3 – 1
3.1 Introduction ........................ 3–2
3.2 Tools and preparation . . . . . . . . . . . . . . . . . . 3 – 2
3.3 Precalibration Values . . . . . . . . . . . . . . . . . . . 3 – 2
3.4 Calibration......................... 3–4
3.5 Other tests and adjustments . . . . . . . . . . . . . . . 3 – 6
3.6 SIM980 Performance Test Record . . . . . . . . . . . . 3 – 7
4 Circuitry 4 – 1
4.1 Circuit Descriptions . . . . . . . . . . . . . . . . . . . . 4 – 2
4.2 PartsLists ......................... 4–4
4.3 Schematic Diagrams . . . . . . . . . . . . . . . . . . . 4 – 5
i
ii Contents
SIM980 Analog Summing Amplifier
General Information
The SIM980 Summing Amplifier, part of Stanford Research Sysetems’
Small Instrumentation Modules family, is a four-input, unity-gain
amplifier for combining multiple analog signals from DC to 1 MHz.
Service
Do not install substitute parts or perform any unauthorized modifi-
cations to this instrument.
The SIM980 is a single-wide module designed to be used inside the
SIM900 Mainframe. Do not turn on the power until the module is
completely inserted into the mainframe and locked in place.
iii
iv General Information
Symbols you may Find on SRS Products
Symbol Description
Alternating current
Caution - risk of electric shock
Frame or chassis terminal
Caution - refer to accompanying documents
Earth (ground) terminal
Battery
Fuse
On (supply)
Off (supply)
SIM980 Analog Summing Amplifier
General Information v
Notation
The following notation will be used throughout this manual.
A warning means that injury or death is possible if the instructions
WARNING are not obeyed.
A caution means that damage to the instrument or other equipment
CAUTION is possible.
Typesetting conventions used in this manual are:
•Front-panel buttons are set as [Button];
[Adjust ] is shorthand for “[Adjust ] & [Adjust ]”.
•Front-panel indicators are set as Overload.
•Remote command names are set as *IDN?.
•Literal text other than command names is set as OFF.
Remote command examples will all be set in monospaced font. In
these examples, data sent by the host computer to the SIM980 are set
as straight teletype font, while responses received by the host
computer from the SIM980 are set as slanted teletype font.
SIM980 Analog Summing Amplifier
vi General Information
Specifications
Performance Characteristics
Number of inputs 4
Function Inverting, non-inverting, or off
Gain 1×
Input impedance 1 MΩ
Bandwidth DC to 1 MHz
Output voltage noise 30 nV/√Hz@ 1 kHz, max.
Crosstalk −80 dB @ 1 kHz
Offset voltage ±100 µV (after 5 min. warm up)
Input range ±10 V before overload
Output range ±10 V before overload
Input slew rate 40 V/µs
Total Harmonic Distortion 0.01% (−80 dB) max. @ 1 kHz
Output slew rate 75 V/µs
Operating temperature 0 ◦C to 40 ◦C, non-condensing
Power +5 V (100 mA)
±15 V (300 mA)
General Characteristics
Interface Serial (RS-232) through SIM interface
Connectors BNC (5 front, 1 rear)
DB–15 (male) SIM interface
Weight 1.5 lbs
Dimensions 1.500 W×3.600 H×7.000 D
SIM980 Analog Summing Amplifier
1 Getting Started
This chapter gives you the necessary information to get started
quickly with the SIM980 Summing Amplifier.
In This Chapter
1.1 Introduction to the Instrument . . . . . . . . . . . . 1 – 2
1.1.1 Overview .................... 1–2
1.1.2 Power-on State . . . . . . . . . . . . . . . . . 1 – 2
1.2 Front-Panel Operation . . . . . . . . . . . . . . . . . 1 – 2
1.2.1 Inputs ...................... 1–3
1.2.2 Output...................... 1–4
1.3 SIMInterface ...................... 1–4
1.3.1 SIM interface connector . . . . . . . . . . . . 1 – 4
1.3.2 Direct interfacing . . . . . . . . . . . . . . . . 1 – 4
1–1
1–2 Getting Started
1.1 Introduction to the Instrument
The SIM980 Summing Amplifier is a four-input, unity-gain amplifier
for combining multiple analog signals from DC to 1 MHz.
1.1.1 Overview
The basic function of the SIM980 is to add or subtract up to four
analog signals. Each input channel can be separately configured for
inverting or non-inverting operation, or switched off. Each input is
1 MΩand DC-coupled, and accepts signals between ±10 V.
1.1.2 Power-on State
The SIM980 stores its operation state (input channel configuration)
in non-volatile memory. At power-on, the SIM980 will return to its
previous configuration after a brief system check and initialization.
1.2 Front-Panel Operation
The front panel of the SIM980 (see Figure 1.1) provides a simple
operator interface.
Figure 1.1: The SIM980 front and rear panels.
SIM980 Analog Summing Amplifier
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