Agilent Technologies E4428C, Руководство пользователя

Страница: 354 / 700

330 Chapter 10
CDMA Digital Modulation
cdma2000 Reverse Link Modulation for Receiver Test
You have now modified the reverse fundamental channel parameters so that the radio configuration is 4, the
data is a fixed 4-bit pattern of 1010, the relative channel power is
−
10 dB, and EbNo value is 12 dB.
Figure 10-13 shows what the display should look like when this task is completed.
Figure 10-13 Reverse Fundamental Channel (R-FCH) Setup
Note that the ESG allows you to set the relative channel power for each active channel. To display the
normalized relative channel power after completing the setup, it is recommended that you perform the steps
in
“Adjusting Code Domain Power” on page 330 . Also note that varying the EbNo value on one channel will
affect the EbNo values on all active channels. Refer to “Managing Noise” on page 331 to learn how to make
final noise adjustments.
Adjusting Code Domain Power
The tasks in this procedure build upon the previous procedure. This procedure teaches you how to perform
the following tasks:
• “Scaling to 0 dB” on page 330
• “Setting Equal Channel Powers” on page 331
Scaling to 0 dB
After changing the relative power level for a channel, the ESG automatically scales the total power to 0 dB,
while preserving the relative channel power levels. The displayed power levels remain unchanged so the
user can complete the relative power adjustments. This task teaches you how to update the display to show
the normalized relative channel power for each channel after completing the setup.
1. Press
Mode Setup
to return to the top-level real-time cdma2000 menu.