1.2
Front Panel Operation
1 – 3
gain settings, the overload light, the input settings, the coupling and
the shield states, and the buttons to control them.
Figure 1.2: The SIM910 front and rear panel.
1.2.1
Gain
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
ff
ect. Pushing [Gain ] when on gain
1 produces no e
ff
ect.
1.2.2
Offset
The o
ff
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
ff
set trimming procedure.
1.2.3
Overload
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
SIM910
JFET Preamp
