Atec Aeroflex-3920 - Manual (Page 14)

DEMODULATION MEASUREMENTS
AUDIO AND MODULATION MEASUREMENTS
Modes (For Hum and Noise and Signal-to-Noise Ratio)
Mode Stimulus Stimulus
Port
Measurement
Input
Measurement
Port
1 RF Generator TR /Gen AF Input Audio In 1 or 2
2 AF Generator Fctn Gen Out RF Receiver TR/Antenna
Resolution Volts: 1 mV (input <1 V),
10 mV (input ≥1 V)
dBr, dBV, dBm: 0.01 dB
Accuracy 5% (Unbalanced, Hi-Z, 300 to 3 kHz, 0.1 to
30 Vrms)
Frequency Range 20 Hz to 20 kHz
SINAD METER
Range 0 to 60 dB
Resolution 0.01 dB
Accuracy ±1 dB, ±1 count (SINAD >3 dB, ≤40 dB,
5 kHz LP AF filter
Frequency Range 300 Hz to 5 kHz
Level Range (Audio) 0.1 to 30 Vrms
DISTORTION METER
Range 0.0 to 100.0%
Resolution 0.1%
Accuracy <±0.5% (Distortion 1 to 10%, 5 kHz LP AF
Filter)
<±1.0% (Distortion 10 to 20%, 5 kHz LP AF
Filter)
Frequency Range 300 Hz to 5 kHz
Level Range (Audio) 0.1 to 30 Vrms
HUM AND NOISE
Range -100 dB to 0 dB
Resolution 0.01 dB
Accuracy ±1 dB, ±1 count (>-60 dB, ≤-20 dB)
Signal Frequency 300 Hz to 5 kHz
Audio Input Level 0.1 to 30 Vrms
RF Input Level T/R Port: - 10 to +50 dBm
ANT Port: -80 to +10 dBm
SIGNAL-TO-NOISE
RATIO
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
Audio Input Level 0.1 to 30 Vrms
RF Input Level T/R Port: - 10 to +50 dBm
ANT Port: -80 to +10 dBm
Audio Input
Characteristics for the
following meters AF Counter, AF Level Meter, SINAD
Meter, Distortion Meter, Hum and Noise
Meter, Signal-to-Noise Meter
Front Panel Audio Inputs Audio 1 or Audio 2 (unbalanced,
chassis reference)
Audio 1 and Audio 2 (balanced, 600
Ω
differential input)
Audio Input Impedance
(Audio 1 and 2)
Hi-Z (>10 k Ω ) - Unbalanced input
600
Ω
- Unbalanced input (8 Vrms MAX
input*)
600 Ω - Balanced input (Audio 1 and 2)
* Note - 600 Ω unbalanced will
auto-switch to Hi-Z @ 8 Vrms
AF COUNTER
Range 20 Hz to 20 kHz (usable from 10 Hz)
Resolution 0.1 Hz
Accuracy ±50 ppm max, ±10 ppm typical
Wave shape Sine or square
Level Range (Audio) 20 mV to 30 Vrms
AF LEVEL METER
Range 0 to 30 Vrms
RF CHARACTERISTICS
Frequency Range 10 MHz to 1.05 GHz (Standard) (Usable
from 100 kHz)
10 MHz to 2.7 GHz (392XOPT058)
(Usable from 100 kHz)
Input RF Level T/R Port: -10 to +50 dBm
ANT Port: -80 to +10 dBm
DEMOD COUNTER
Range 20 Hz to 20 kHz (1 to 100 kHz FM
Deviation, IF BW set appropriately for the
received modulation BW)
20 Hz to 10 kHz (30 to 90% AM, IF BW
set appropriately for the received
modulation BW)
Resolution 0.1 Hz
Accuracy ±50 ppm (±10 ppm typical)
Waveform Sine or Square
FM DEVIATION METER
Range 0 to 150 kHz
Resolution 10 Hz
Accuracy ±3% plus source residual, ±1 count
(1 to 150 kHz FM deviation, IF BW set
appropriately for the received
modulation BW)
FM Rate 20 Hz to 20 kHz (IF BW set appropriate-
ly for the received modulation BW)
AM DEVIATION METER
Range 0 to 100%
Resolution 0.1%
Accuracy ±3% + source residual, ±1 count (30
to 90% AM, IF BW set appropriately for
the received modulation BW)
AM Rate 20 Hz to 15 kHz (IF BW set appropriate-
ly for the received modulation BW)
14