To view data for a single code channel
This task builds on the previous task to show you how to view the vector
diagram for individual channels. The power varies in each channel. The
task turns normalization off so you can see the vector diagram change size
when you change channels.
1. Perform the previous task.
2. Display the vector diagram in trace B:
Press [
B
].
Press [
Measurement Data
], [
time domain]., [
IQ measured
].
Press
[Data Format
], [
polar (IQ) vector
].
3. Turn normalization off to compare the absolute power between different
channels:
Press [
Instrument Mode], [demodulation setup], [normalize off].
4. Select the first 120 ksym/s channel in the composite code-domain display:
Press [
A
].
Move the marker until the marker readout shows Chan: 120 ksym/s C5(8).
5. Display the vector diagram for the selected channel:
Press [
Marker →], [mkr→ layer/channel].
6. Autoscale the results:
Press [
Auto Scale
].
7. Display the vector diagram for the second 120 ksym/s channel:
Move the marker until the marker readout shows Chan: 120 ksym/s C5(9).
Press [
Marker →], [mkr → layer/channel].
8. Using a different method, display the constellation diagram for the third
120 ksym/s channel:
Press [
Time
], [
code channel], 10,
[
code].
All time-domain measurement data (except composite time domain) and
the symbol table show results for a single channel in a single code layer
(you use the [
Measurement Data] hardkey to select time-domain measurement
data and the symbol table). By default, the analyzer uses channel 0 in
slowest code layer. This procedure shows you two ways to select a
different channel and layer—using the [
mkr → layer/channel] softkey or the [code
channel
]
and
[
code layer]
softkeys.
Using Wideband CDMA (Options B73, B79, and 080)
13 - 8
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