470 Chapter 16
W-CDMA Uplink Digital Modulation for Receiver Test
Generating a Single PRACH Signal
Connecting the ESG
Refer to Figure 16-17 and make the connections as shown.
Figure 16-17 AICH Connection Diagram
Configuring the PRACH Message for the AICH Trigger
1. Press
Mode Setup > Link Control > PhyCH Setup > PRACH Timing Setup.
2. Select AICH as the entry for the Message Part field.
a. Highlight the Message Part field.
b. Press
Edit Item > AICH.
This sets up the PRACH signal so that the message part is not transmitted until an AICH trigger is
received. Since the ESG is not a receiver, it cannot receive and demodulate a true AICH signal, so
the input has to be a trigger signal.
3. Set the number of preambles to 1.
a. Highlight the Number of Preamble field.
b. Press
1 > Enter.
You can set the number of preambles in either the PRACH Power or PRACH Timing Setup display.
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