R&S®SML / R&S®SMV03 Test sequence
1090.3123.12 10.25 E-6
Crosstalk attenuation in FM stereo
Test setup Test setup 1 with modulation analyzer
Connect the AF1 connector on the stereo coder to the MOD input
on the R&S SML / R&S SMV03
Settings on R&S SML / R&S
SMV03
- LEVEL 0 dBm
- MODULATION FM FM DEVIATION 46.5 kHz
FM SOURCE EXT
EXT COUPLING DC
- FREQ Test frequency stereo
Test frequencies: 87 MHz, 98 MHz, 108 MHz
Setting on the modulation
analyzer
Switch on 1 kHz stereo signal on stereo coder, set level of useful
signal to 40 kHz peak deviation and level of pilot tone to 6.5 kHz peak
deviation.
Demodulation: FM STEREO
CHANNEL: L or R
DETECTOR RMS
FILTER: 10 Hz to 100 kHz
Relative deviation measurement
Measurement Switch on the left channel on the stereo coder and carry out a
relative measurement. Then switch to the right channel on the
demodulator and read off the crosstalk attenuation.
Then carry out the same measurement with the right channel.
Total harmonic distortion in FM stereo
Test setup See measurement of crosstalk attenuation in FM stereo
Settings on R&S SML / R&S
SMV03
- See measurement of crosstalk attenuation in FM stereo
Setting on the modulation
analyzer
- Stereo signal as for crosstalk attenuation measurement
- Demodulation: FM STEREO
- CHANNEL: L or R
- DETECTOR RMS
- FILTER: 10 Hz to 100 kHz
- AUDIO: Switch on harmonic distortion meter
Measurement Read off harmonic distortion from modulation analyzer
Carry out measurement for left and right channels
Signal-to-noise ratio in FM stereo
Test setup See measurement of crosstalk attenuation in FM stereo
Settings on R&S SML / R&S
SMV03
- See measurement of crosstalk attenuation in FM stereo
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