Troubleshooting R&S SMB
1407.0806.82 3.20 E-6
Fault Test Action if test fails
Stereo
Modulation
Faulty
(only applies if
option
R&S SMB-B5
Stereo/RDS
Coder is
installed)
The FM Stereo multiplex signal is generated
in the Stereo coder module and transferred to
the RF Board modulation input. Run Internal
Adjustments to ensure the VCOs generating
the RF signal working in their optimum and
adjust the Stereo coder module.
The FM Stereo performance has to match the
values given in the datasheet. Measure with a
suitable demodulating receiver.
If the Internal Stereo Coder
Adjustment fails and the Synthesis
Adjustment succeeds, check the
Stereo coder output (see page
3.32). If the Synthesis Adjustment
fails, most probably the RF Board is
defective. Check the RF Board
being supplied correct (see page
3.24).
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