Atec Rohde-Schwarz-CMW500 - Manual (Page 41)

Version 11.00, May 2013
Rohde & Schwarz R&S ® CMW500 Wideband Radio Communication Tester 41
FM STEREO RADIO analyzer (R&S ® CMW-KM645 option)
Frequency range FM 70 MHz to 110 MHz
Statistics
Statistical count 1 to 1000
Values current, average, maximum, minimum,
standard deviation
Audio filter, weighting
Lowpass off, 3 kHz, 4 kHz, 15 kHz
Highpass off, 6 Hz, 50 Hz, 300 Hz
Deemphasis off, 50 μs, 75 μs, 750 μs
Weighting filter off, A-weighting
RF carrier analysis
Carrier frequency error
Measurement range for nominal deviation of 75 kHz ±10 kHz
Uncertainty for deviation ≤ 75 kHz < 35 Hz + drift of timebase,
see general technical specifications
Multiplex deviation
Measurement range without frequency offset ≤ 96 kHz
Uncertainty < 1 %, peak
Modulation analysis
Filter filter bandwidth bandpass 500 kHz
Level range –28 dBm to +42 dBm 22
Measured parameters numeric results carrier power,
carrier frequency error,
multiplex deviation,
pilot deviation,
audio left/right deviation,
pilot frequency error,
THD left/right,
THD+N/SINAD left/right,
SNR left/right
Pilot frequency error
Measurement range for nominal deviation of 6.75 kHz ±10 Hz
Uncertainty for deviation ≤ 67.5 kHz, drift of timebase
according to pilot 19.0 kHz
< 0.1 Hz + drift of timebase,
see general technical specifications
THD
Measurement range < 10 %
Inherent distortion < 0.05 %
Uncertainty for modulation frequency of 1 kHz and
deviation of 67.5 kHz < 1 % + inherent distortion
THD+N / (SINAD)
Measurement range < 10 %
Inherent distortion with deemphasis filter (50 µs) and
A-weighted filter < 0.20 %
Uncertainty for modulation frequency of 1 kHz,
deviation of 67.5 kHz and with
deemphasis filter (50 µs) and A-weighted
filter < 1 % + inherent distortion
SNR
Inherent distortion with deemphasis filter (50 µs) and
A-weighted filter > 54 dB
22 The maximum permissible continuous power is +34 dBm due to thermal limits.