Chapter 9 275
BERT
Measuring RF Loopback BERT with Option 300
Synchronizing to the BCH Then the TCH
The following steps show you how to synchronize to the broadcast channel (BCH). Set up the base station
and start sending the BCH signal now. The BCH is only required to contain the synchronization logical
channel (SCH).
1. Follow the instructions under “Configuring GSM Mode on the Agilent Technologies E4406A VSA
Series Transmitter Tester” and “Configuring GSM Mode on the ESG Vector Signal Generator” in this
chapter, to prepare the test equipment for synchronization.
2. Press
Aux Fctn > BERT > BTS BERT GSM Loopback.
3. Press
Sync Source BCH TCH/PDCH to BCH.
4. Press
GSM BERT Off On to On > Synchronize to BCH/TCH/PDCH. Refer to Figure 9-6 on page 275. You will
briefly see Synchronizing to BCH flashing on the display.
Figure 9-6
Once synchronization is achieved, the ESG will expect to receive a TCH to decode and, accordingly, will
display the Waiting for TCH message. Refer to Figure 9-7.
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