Introduction To The Instrument; Front-Panel Operation - Stanford Research Systems SIM984 Operation And Service Manual

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1.1 Introduction to the Instrument

1.1.1 Overview
1.1.2 Power-on State

1.2 Front-Panel Operation

1.2.1 Inputs
WARNING
1.2.2 Gain
The SIM984 Isolation Amplifier is a low-noise, programmable gain
amplifier for isolating analog signals from DC to 1 MHz.
The basic function of the SIM984 is to isolate and (possibly) amplify
an analog signal. The input presents a 1 MΩimpedance between the
red and black banana jacks, but is high impedance (floating) between
each input jack and chassis ground. A maximum of ±1000 Vdc can be
between either jack and ground, but the potential between the input
jacks must be less than ±10 V. The input is DC coupled.
A gain of ×1, ×10, or ×100 can be set from the front panel. The output
bandwidth is also adjustable from the front panel, with three choices
of high-frequency cut-off: 100 Hz, 10 kHz, and 1 MHz. Finally, the
output DC offset can be trimmed using a thin screwdriver accessing
the "Offset" hole near the output BNC.
The SIM984 stores its operation state (gain and bandwidth configu-
ration) in non-volatile memory. At power-on, the SIM984 will return
to its previous configuration after a brief system check and initializa-
tion.
The front panel of the SIM984 (see Figure 1.1) provides a simple
operator interface.
The input to the SIM984 is through the red and black banana jacks in
the front-panel "INPUT" block.
The banana jacks are isolated from the chassis for use with insulated
test leads. If the user connects a BNC–to–Banana adaptor to the
SIM984 to allow inputs from a BNC-terminated cable, it is critical
that no dangerous voltages be applied to the cable, as the exposed
shield of the input BNC could create an electrical hazard.
User gain settings of ×1, ×10, and ×100, are selected with the left and
right [Gain] buttons.
Getting Started
SIM984 Isolation Amplifier