Models 960 & 960B

Single Channel –

Certified

Specifications

4

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

Input Characteristics

Input Impedance:

Differential

2 M

Ω Shunted by 47pF

Single Ended

1 M

Ω Shunted by 47pF

Coupling

DC

Input Voltage:

Linear Differential

20V p-p (Gain Set at 0 dB)

Max Safe

Any Continuous Value

Differential Voltage

between

±40V

Bias Current

1 nA typ.; 2 nA max.

Common Mode

> 80 dB @ 1 kHz

Rejection ratio

> 70 dB @ 10 kHz

(0 dB Gain)

> 55 dB @ 100 kHz

Noise Voltage Density

@ 70 dB Gain

12 µVrms/

√Hz typ.

1 MHz Bandwidth

Minimum Discernable

Signal*

@ 1 kHz with

1 mV @ 0 dB Gain

1 MHz Bandwidth

20 µV @ 40 dB Gain

13 µV @ 70 dB Gain

@ 1 kHz with

1 mV @ 0 dB Gain

10 kHz Bandwidth

10 µV @ 40 dB Gain

2 µV @ 70 dB Gain

Output Characteristics:

Small Signal

Bandwidth

>1 MHz @ 3 dB down

Output Max Voltage

20V p-p for RL-2K

Ω

(Single Output)

10V p-p for RL=50

Ω

(DC to 500 kHz)

10V p-p for RL=2K

Ω

5V p-p for RL=50

Ω

(500 kHz to 1 MHz)

Output Max Power

0.25 Watt for RL=50

Ω

Output Protection

Short Circuit to Ground

Output Impedance

50

Ω Single

100

Ω Differential

Gain Settings

0 to 80 dB in 1 dB Steps

Gain Accuracy

±0.2 dB

Distortion @ 3.5 Vrms

> 90 dB 1 kHz-10 kHz

(at 0 dB Gain)

Overload Light

lights at

≈ 24 V p-p

Transfer Function

Bessel with Constant

of Filters

Delay in the Pass-Band

Offset Voltage

Adjustable to Zero

Offset Voltage Range

0-60 dB Gain Setting

± 0.5 VDC

70 dB Gain Setting

± 1.5 VDC

* Minimum Discernable Signal is that signal that makes the output of the 960 Amplifier increase by 3 dB when measured with a wideband (2 MHz)

True RMS Voltmeter.