960 Datasheet, PDF (2/5 Pages) Frequency Devices, Inc. – Wideband High-Gain Amplifier Instrument

Models 960 & 960B
Single Channel – Certified
Model 960 Series
Front Panel Description
Location of Front Panel Terminals and Controls
A. POWER Status Lamp: This red LED
indicates whether or not the amplifier power is
on. On the 960B battery operated model this
lamp will blink when the battery needs
recharging.
B. dB Gain Switch: These selector
switches allow the user to set the gain from
0 dB to 80 dB in 1 dB steps.
C. Bandwidth Switch: This switch changes
the amplifier bandwidth from 10 Hz up to 1
MHz in decades.
D. Overload Lamp: This red LED comes on
when the output of the amplifier is over driven
and is no longer in linear gain mode. It will
come on when the output is about 24 volts
peak-to-peak. Reduce the gain or the input
signal to turn this light off for best operation.
E. Input BNC: This is the input connector for
the amplifier. In single input mode the input
signal is applied to the center pin of the BNC
connector and the shell of the BNC connector
is grounded. In differential input mode the
non-inverting input is the center pin of the
BNC connector and the inverting input is the
shell of the BNC connector.
F. Single/Differential Switch: This switch
selects whether the amplifier input is in single
ended or differential mode.
G. GROUND Terminal: This “Banana” type
test jack provides neat and secure access to
the internal ground. This terminal is a
convenient junction for grounding external
system and measurement instrumentation
and/or apparatus.
H. OFFSET Adjust: This adjustment is
intended to zero the offset that results from
the instrument’s own internal circuitry.
I. Single/Differential Switch: This switch
selects whether the amplifier output is in
single ended or differential mode.
J. Output BNC: This is the output connector
for the amplifier. In single output mode the
output signal is applied to the center pin of
the BNC connector and the shell of the BNC
connector is grounded. In differential output
mode the non-inverting output is the center
pin of the BNC connector and the inverting
output is the shell of the BNC connector.
When this switch is in differential mode the
gain of the amplifier is automatically adjusted
to correct the output gain.
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