Atec Rohde-Schwarz-CMW500 - Manual (Page 18)

Version 11.00, May 2013
18 Rohde & Schwarz R&S ® CMW500 Wideband Radio Communication Tester
Audio specifications (prerequisite: R&S
®
CMW-B400B)
Audio analyzer
Statistics
Statistical count 1 to 1000
Values current, average, extremum, standard
deviation
Audio filter, weighting
Lowpass off, 3 kHz, 4 kHz, 15 kHz
Highpass off, 6 Hz, 50 Hz, 300 Hz
Weighting filter off, A-weighting, CCITT, C-message
Connectors AF 1 IN / AF 2 IN
Input impedance 100 kΩ | 15 pF
AF voltmeter
Frequency range 50 Hz to 21 kHz
Level range 50 µV to 30 V
Level resolution at level < 1 mV 1 µV
at level ≥ 1 mV 0.1 %
Level uncertainty at 1mV ≤ level < 20 mV < 1.3% + resolution
at 20 mV ≤ level ≤ 20 V < 1.0 % + resolution
THD+N and THD meter
Measurement bandwidth 21 kHz
Frequency range 100 Hz to 10.5 kHz
Level range 10 mV to 30 V
Resolution 0.01 %
Inherent distortion THD+N at 100 mV ≤ level ≤ 20 V < 0.05 %
Inherent distortion THD at 100 mV ≤ level ≤ 20 V < 0.025 %
Uncertainty at 100 mV ≤ level ≤ 2 V < 1 % + inherent distortion
at 2 V ≤ level ≤ 20 V < 2 % + inherent distortion
Audio generator
Connectors AF 1 OUT / AF 2 OUT
Output impedance < 4 Ω
Maximum output current 20 mA
AF sine generator
Frequency range 20 Hz to 21 kHz
Frequency uncertainty same as time base ,
see base unit specifications
Frequency resolution 1 Hz
Level range 10 µV to 5 V
Level resolution at level < 10 mV 10 µV
at level ≥ 10 mV 0.1 %
Level uncertainty at level ≥ 1 mV and
frequency ≤ 10 kHz ≤ 1.5 % + resolution
THD+N at level ≥ 100 mV,
into load ≥ 600 Ω,
measurement bandwidth: 21.9 kHz ≤ 0.05 %
THD at level ≥ 100 mV,
into load ≥ 600 Ω,
measurement bandwidth: 21.9 kHz ≤ 0.025 %