464 Chapter 16
W-CDMA Uplink Digital Modulation for Receiver Test
Generating a Single PRACH Signal
Figure 16-12 Displayed ESG Signal
Modifying the PRACH Physical and Transport Layers
The tasks in this procedure build upon the previous procedure, “Generating the Baseband Signal” on
page 463.
The ESG lets you set many of the parameters that govern the PRACH transmission. This procedure guides
you through modifying some of these parameters for the physical and transport layers.
Modifying the Physical Layers
This task includes an example of setting up the preamble power ramp.
1. Press
Link Control > PhyCH Setup > PRACH Power Setup.
2. Set the preamble power.
a. Move the cursor to highlight the Max Pwr field.
b. Press
−20 > dBm.
This value is linked to the carrier signal power setting. When the W-CDMA format is first turned on,
the Max Pwr Field value changes to match the carrier signal power. It is a good practice to have
the W-CDMA format on prior to making adjustments to the PRACH power.
Preamble
PRACH Message
PRACH pulse triggers
the beginning of the
PSA sweep
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