Aeroflex 3901 - Page 267

3900 Platform Specifications
Subject to Export Control, see Cover Page for details.
B-13
Audio & Modulation Measurements (cont)
Hum and Noise
Modes
Meter Range
-100 to 0 dB
Resolution
0.01 dB
Accuracy
+1 dB, +1 count (> -60 dB, < 20 dB)
Signal Frequency
300 Hz to 5 kHz (Entry range 0 to 24,000 Hz)
Audio Input Signal Level (Mode 1)
3901 / 3902
0.1 to 8 Vrms
3920
0.1 to 30 Vrms
RF Level Input (Mode 2)
T/R
-10 to +50 dBm
ANT
-80 to +10 dBm
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)
Mode Stimulus Stimulus Port Measurement
Input
Measurement
Port
1 RF Generator T/R / GEN AF Input Audio In 1 / 2
2 AF Generator Fctn Gen Out RF Receiver T/R / ANT