Agilent Technologies ESG Betriebsanweisung Seite 187

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Chapter 6 171
BERT Testing
Measuring RF Loopback BER with Option 300
10.Press Amplitude > 95 > dBm.
The amplitude can also be set using an
Amplitude softkey, located in the Baseband BERT
softkey menu, that is accessed by pressing the
Aux Fctn > BERT > Baseband BERT softkeys.
11.Press
Mode Setup > RF On/Off.
Refer to Figure 6-5. The screen now displays channels 1, 2, and 3 turned on and channels 1
and 3 with a 50 dB alternate amplitude setting. Also, the RF annunciator is turned on, and
the new power level is shown in the amplitude area of the display.
Figure 6-5
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 6-6 on
page 172. You will briefly see Synchronizing to BCH flashing on the display.
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