To Demodulate A Vsb Signal - Agilent Technologies 89410A Operator's Manual

Using Video Demodulation
(Opt. AYH)

To demodulate a VSB signal

This task shows you how to demodulate a VSB signal. The task uses the
8 VSB time-capture signal that you loaded into the analyzer in ''To prepare
a VSB measurement''.
1.
Prepare the analyzer for a VSB measurement as shown in the ''To prepare a
VSB measurement''.
2.
Turn averaging off and restart the measurement:
Press [ ] [
Average average off]
Press [
Measurement Restart
3.
Demodulate the signal:
Press [ ], [
Instrument Mode
4.
Select the correct demodulation parameters for the 8 VSB signal (if you are not
using the signal provided on the Signals Disk, enter the parameters for your
signal) :
Press
[demodulation setup
Press [ ], [
demod format
Press [ ], 10.762, [
symbol rate
Press [ ], 800, [
result length
Press [ ], [
ref filter raised cosine
Press [ ], [
Return meas filter
Press [ ], .1152
alpha/BT
Press [ ], [
Time
points/symbol
Press [ ], [
pulse search off
5.
If you are using the 8 VSB signal from the Signals Disk, skip the next step.
6.
If the pilot is on the right (high side) of the spectrum, configure the analyzer to
demodulate a high-side pilot:
Press [
Instrument Mode
To learn what [
freq spectrum mirror
press [ ]).
freq spectrum
9 - 6
.
].
], [
demod type Video Demodulation
].
], [ ].
VSB 8
Return
]
MHz
]
sym
]
], [ ].
root raised cosine
], 5.
sync search off
].
], ], [ ], [
more
[demodulation setup
] does, see online help (press [
], [
Return].
].
freq spectrum mirror
], then
Help