Gain; Overload - Stanford Research Systems BJT SIM911 Operation And Service Manual

1.2 Front Panel Operation

1.2.1 Gain

1.2.2 Offset

1.2.3 Overload

SIM911 BJT Preamp
gain settings, the overload light, the input settings, the coupling and
the shield states, and the buttons to control them.
Figure 1.2: The SIM911 front and rear panel.
The gain is selectable from 1 to 100. Gain settings are 1, 2, 5, 10, 20, 50,
and 100 and are displayed as a product of 1, 2, or 5 and a multiplier
of 10 or 100. Gain is raised or lowered by pressing [Gain ] or [Gain ]
in the GAIN block on the upper right of the module. The change
is reflected in the LEDs to the left of the buttons. Pushing [Gain ]
when on gain 100 produces no e ect. Pushing [Gain ] when on gain
1 produces no e ect.
The o set is adjustable through a hole in the GAIN block of the
front panel with a small flat head screwdriver. See Section 3.1 for a
description of the o set trimming procedure.
There is an overload light in the gain section of the front panel. OVLD
is lit when the input common mode is outside 5 V, the input signal is
1 – 3