DC:
The input circuit is DC coupled.
DC CAL:
A front-panel-selected internal calibration resistor is connected from -P to +S or -P to -S
(Jumper Selectable).Values are 11.88K, 19.88K, 49.00K and 99.00K.
ZERO:
Used with front panel trimpot to null the amplifier with zero-input signal.
INPUT SIGNAL:
The sum of the DC and AC signals should not ,-10Vdivided by the gain setting.
GAIN:
Front panel gain switch selects fixed gains from 1 to 5000 +,-2% in log steps. A front panel gain vernier adjusts
between fixed gains.
FREQUENCY RESPONSE:
Front panel switch selects 3-pole Butterworth low pass filter with nominal -3dB points at
200, 500, 5000, 16000 and 32000Hz. Frequency response in the filter "OUT" position is 100KHz. The frequency response
of the DC channel is 11Hz nominal.
COMMON MODE VOLTAGE:
+,-10V Max.
CMRR:
100dB, DC to 70Hz, DC coupled.
80dB, 70Hz, AC coupled.
80dB, 1KHz, DC coupled.
MONITOR OUTPUT:
+,-10V Max., 0 to 100 mA PK.
TAPE OUTPUT:
+,-10V Max., 2K ohm minimum load.
NOISE:
2.5 microvolts RMS, RTI at G=1000.
DRIFT:
,-10 microvolts, RTI at G=1000 for 24 hrs after a one hour warm up.
LIMIT INDICATOR:
LED lights whenever output signal exceeds 1.0V RMS (factory preset).
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Summary of Contents for 635-002
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