Aeroflex 3901 - Page 264

3900 Platform Specifications
Subject to Export Control, see Cover Page for details.
B-10
Audio & Modulation Measurements (cont)
AF Level Meter
Frequency Range
20 Hz to 20 kHz
Accuracy
3901 / 3902
5% (Unbalanced, Hi-Z, 300 to 3 kHz, 0.1 to 8 Vrms)
3920
5% (Unbalanced, Hi-Z, 300 to 3 kHz, 0.1 to 30 Vrms)
Level Range
3901 / 3902
0 to 8 Vrms
3920
0 to 30 Vrms
Resolution
Volts
1 mV (Input < 1 V)
10 mV (Input >
1 V)
dBr, dBV, dBm
0.01 dB
Scales
Volts: 20 mV to 50 V in a 1, 2, 5 sequence, plus Autoscale
dBr: 1 dBr to 100 dBr in a 1, 2, 5 sequence plus Autoscale
dBV: -40, -20, 0, 20, 40 dBV plus Autoscale
dBm: -30, -20, -10, 0, 10, 20, 30, 40 dBm plus Autoscale
Front Panel Inputs
Audio 1 or 2
Unbalanced, Chassis reference
Audio 1 and 2
Balanced, 600 Ω differential input
Impedance
Hi-Z (> 10 k Ω) Unbalanced input
600 Ω Unbalanced input (8 Vrms Maximum input*)
600 Ω Balanced input
*600 Ω Unbalanced input auto-switches to Hi-Z @ 8 Vrms (3920 only)