Agilent Technologies 89410A User Manual

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
], [
demod type
], [
Video Demodulation
], [
Return].
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], [VSB 8], [
Return
].
Press [
symbol rate
], 10.762, [
MHz
]
Press [
result length
], 800, [
sym
]
Press [
ref filter
], [
raised cosine
]
Press [
Return
], [
meas filter
], [
root raised cosine
].
Press [
alpha/BT
], .1152
Press [
Time], [
points/symbol
], 5.
Press [
pulse search off
], [
sync 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
],
[demodulation setup
], [more], [freq spectrum mirror].
To learn what [
freq spectrum mirror] does, see online help (press [Help], then
press [
freq spectrum]).
Using Video Demodulation
(Opt. AYH)
9 - 6

Agilent Technologies 89410A Specifications

General

Brand	Agilent Technologies
Model	89410A
Category	Measuring Instruments
Language	English