Agilent Technologies 89410A - Page 123

5. Choose demodulation setup parameters:
Press [
Time
], [
pulse search off
], [
sync search off
].
Press [
points/symbol
], 5, [
enter
]
Press [
Instrument Mode
], [
demodulation setup
], [
demod format
], [
QAM 16
]
Press [
Return
], [
symbol rate
], 24.3, [
kHz
].
Press [
result length
], 100, [
sym
]
Press [
meas filter
], [
root raised cosine
]
Press [
Return
], [
ref filter
], [
raised cosine
]
Press [
Return
], [
alpha / BT
], .35, [
enter
]
6. Display the vector diagram:
Press [
Data Format], [polar (IQ) vector].
As shown in this task, with non-standard signals you must select individual
parameters for demodulation setup. For furhter information on
demodulation-setup parameters, see the Digital Demodulation Concepts
chapter if you are using digital demodulation; see the Video Demodulation
Concepts chapter if you are using video demodulation.
Vector diagram for 16 QAM signal
Analyzing Digitally Demodulated Signals (Options AYA and AYH)
10 - 3