Agilent Technologies ESG Betriebsanweisung Seite 319

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Chapter 13 303
W-CDMA Digital Modulation for Component Test
W-CDMA Downlink Modulation
Figure 13-2 Multicarrier Setup Page 2
You now have a user-defined 3-carrier W-CDMA waveform with a 3 DPCH carrier at
frequency offset of
2.5 MHz, with a power of 10.00 dBm, a primary scramble code of 5, a
timing offset of 3, an initial phase of 8, and pre-FIR clipping at 50%.
Clipping the Multicarrier Waveform
1. Press
Mode Setup > More (1 of 2) > ARB Setup > Waveform Utilities > Composite Waveform Clip.
2. Press
Clip |I+jQ| To > 80 > %.
The composite multicarrier waveform is now set to be clipped at 80 percent of its original peak
value. The waveform is clipped after FIR filtering.
NOTE If the waveform is active (W-CDMA Off On set to On), clipping settings are not
applied until you press the Apply Multicarrier softkey.
Generating the Waveform
Press
Mode Setup > W-CDMA Off On until On is highlighted.
This generates a waveform with the user-defined multicarrier W-CDMA state created in the
previous sections. The display changes to Multicarrier Setup: 2 Carriers (Modified).
Note that 2 Carriers refers to the number of carriers in the predefined configuration, not the
number of carriers in the user-modified waveform.
During waveform generation, the WCDMA and I/Q annunciators appear and the waveform is
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