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Meas Setup
a second time branches to the AM Demod menu where AM demodulation settings can be adjusted.
Channel BW (AM Demod)
Sets the RBW setting used by the hardware during the demodulation period in nonzero spans. Note that
this is a separate parameter only for the demodulation function and does not affect the RBW setting in
the BW menu which is used during the normal sweep. The flat top filter type must be used during the
demodulation period. A 5 kHz Video Bandwidth filter is used.
In Zero Span, the test set’s RBW & VBW filters are used for the demodulation; thus, the Channel BW
(and RBW filter type) will match those of the test set. This allows gap-free listening. The Channel BW
key is grayed out and the value displayed on the key matches the current RBW of the test set. Upon
leaving zero span, the non-zero-span setting of Channel BW is restored as well as the flattop filter type.
FM
Pressing this key, when it is not selected, selects and activates the FM demodulation function. Pressing it
a second time branches to the FM Demod menu where FM demodulation settings can be adjusted.
Key Path Meas Setup, Analog Demod Tune&Listen
State Saved Saved in instrument state.
Initial S/W Revision Prior to A.02.00
Key Path
Meas Setup, Analog Demod Tune&Listen, AM
Remote Command [:SENSe]:DEMod:AM:BANDwidth:CHANnel <freq>
[:SENSe]:DEMod:AM:BANDwidth:CHANnel?
Example DEM:AM:BAND:CHAN 200 kHz
Notes This key/command is grayed out in zero span.
Dependencies Unavailable in zero span.
Couplings In zero span only, the value is set equal to the test set’s current RBW value and
it displays that value on the key, but the key is grayed out.
Preset 30 kHz
State Saved Saved in instrument state.
Min 390 Hz
Max 8 MHz
Default Unit Hz
Initial S/W Revision Prior to A.02.00
Key Path
Meas Setup, Analog Demod Tune&Listen
Example DEM FM turns frequency demodulation function ON