Agilent Technologies E4428C, User Manual

Page: 347 / 700

Chapter 10 323
CDMA Digital Modulation
cdma2000 Forward Link Modulation for Receiver Test
Changing Channel States
This task teaches you how to quickly configure the operating states of the forward link channels.
1. Press
Mode Setup
to return to the top-level real-time cdma2000 menu.
2. Press
Link Control
>
Channel State Quick Presets
>
All (Except FQPCH)
.
You have now turned on all forward link channels, except for the forward link quick paging channel
(F-QPCH). The Channel State Quick Presets menu enables you to configure the operating states of all
channels with a single keypress. You can also change the operating state of the selected channel using the
Channel State Off On
softkey, or by editing the
State
field among the Channel Setup parameters.
Modifying Channel Parameters
This task teaches you how to edit the parameters for the selected channel.
1. Move the cursor to highlight the forward fundamental channel (F-FCH).
2. Press
Channel Setup
.
3. Move the cursor to highlight the
Radio Config
field.
4. Press
4
>
Enter
.
NOTE
An important change from earlier ESG models is that radio configuration is now
independent between fundamental and supplemental channels.
5. Move the cursor to highlight the
Data
field.
6. Press
Edit Item
>
FIX4
>
1010
>
Enter
>
Return
.
7. Move the cursor to highlight the
Power
field.
8. Press
−
10
>
dB
.
9. Move the cursor to highlight the
EbNo
field.
10. Press
12
>
dB
>
Return
.
You have now modified the forward 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 10-10 on page 324 shows what the display should look like when this task is completed.