Agilent Technologies E4438C User Manual

284 Chapter 9
BERT
Using the External Frame Trigger Function with the EDGE Format
Using the External Frame Trigger Function with the EDGE Format
NOTE This function is available only when the Frame Trigger Source BCH PDCH is set to PDCH.
The External Frame Trigger Function is used to adjust the burst timing at PDCH synchronization. This
requires calculating a delay value and then adjusting the initial value.
Measuring the Initial Delay Value
1. Configure the BTS and the VSA setup. Refer to Figure 9-15.
Figure 9-15 System Configuration for Measuring External Delay Value
2. Set up the BTS to transmit the frame trigger EDGE burst at timeslot 0.
3. On the VSA, press
Mode > EDGE w/GSM.
4. Press
Measure > Waveform (Time Domain).
5. Press
Meas Setup > Trig Sour ce > Ext Front.
6. Press
Makers.
7. Use the marker function to find the offset value (D), in microseconds, between the BTS frame trigger
and the starting edge of the midamble. Refer to Figure 9-16 on page 285.

Agilent Technologies E4438C Specifications

General

Brand	Agilent Technologies
Model	E4438C
Category	Portable Generator
Language	English