Agilent Technologies 89410A Operator's Manual page 107

Note
To demodulate VSB signals,
the pilot must be on the left
(low side) of the spectrum. If
it isn't, you must configure the
analyzer to demodulate a
high-side pilot, as shown in
''To demodulate a VSB
signal.''.
(Opt. AYH)
VSB measurements typically require a large portion of measurement
memory. Therefore, it is a good idea to choose the maximum value (4096)
for [ ] (see step 1). For details about [
max time points
help (press [ ], then press [
Help
Before demodulating a VSB signal, view the signal in Vector mode to verify that
the pilot is on the left (low side) of the spectrum. If it isn't, you must configure
the analyzer to demodulate a high-side pilot. For further details, see
''To demodulate a VSB signal.''
Spectrum of an 8 VSB signal
max time points
]).
max time points
Using Video Demodulation
], see online
9 - 3