G.R.A.S. SOUND & VIBRATION
Power Module Type 12AQ
Page 20
6
Specifications
Preamplifier inputs
Traditional
Connectors:
7-pin LEMO female
Power supply:
±15 V or ±60 V
Polarization:
0 V or 200 V
Input impedance:
100k Ω
CCP
Connectors:
BNC
coaxial
Power supply:
4 mA sourced at 28 V DC
Input Impedance:
100k Ω
Signal outputs
Connectors:
BNC
coaxial
Output Impedance:
100 Ω
Output:
Floating or non-floating
Overload level:
9 V peak
Gain
– 20 dB to 70 dB in discrete steps of 10 dB
Bandwidth
For gain from – 20 dB to 50 dB
10 Hz to 100 kHz ± 0.1 dB
2 Hz to 200 kHz ± 0.2 dB
For gain 60 and 70 dB
10 Hz to 20 kHz ± 0.1 dB
Phase-matching (no filters)
IEC 1043 (same gain setting)
Inherent noise
re. input when not dominated by output noise
Filter setting
Lin
(HP filter 0.56 Hz);
20 Hz to 20 kHz:
< 2 µV RMS
20 Hz to 200 kHz:
< 5 µV RMS
Other filters;
20 Hz to 20 kHz:
< 10 µV RMS
20 Hz to 200 kHz:
< 25 µV RMS
re. input when dominated by output noise
Filter setting
Lin
(HP filter 0.56 Hz);
20 Hz to 20 kHz:
< 10 µV RMS
20 Hz to 200 kHz:
< 30 µV RMS
Other filters;
20 Hz to 20 kHz:
< 10 µV RMS
20 Hz to 200 kHz:
< 30 µV RMS
