Models 960 & 960B

Model 960 Series

Single Channel –

Certified

Front Panel Description

2

1784 Chessie Lane, Ottawa, Illinois 61350

• Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176

e-mail: sales@freqdev.com

• Web Address: http://www.freqdev.com

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.