Chapter 17 621
W-CDMA Downlink Digital Modulation for Receiver Test
Making Compressed Mode Signal Measurements
Figure 17-29 DPCH Signal Parameters
8. Select a frame capture interval that will display the DPCH compressed pattern.
Press
More 1 of 3 > Capture Intvl > 8 Frame (Long Mode).
Notice that the display changes from code domain to symbol power.
9. Zoom in on the symbol power display
Press the
Zoom hardkey.
10. Trigger the spectrum analyzer from the rear panel input using the supplied ESG DPCH compressed
frame trigger signal.
Press
More 2 of 3 > Trig Source > Ext Rear.
NOTE If you have not started the triggering for the ESG compressed mode signal, press the
Compressed Mode Start Trigger softkey on the ESG.
11. Start the measurement for the symbol power.
Press the
Restart hardkey.
The spectrum analyzer may take a few moments to display the DPCH symbol power. Depending on
which compressed frame triggers the spectrum analyzer measurement, your display may differ from the
one showing in Figure 17-30. However the characteristics of the signal as depicted in Figure 17-30 still
apply.
DPCH Channel Code
DPCH Symbol Rate
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