Chapter 3, Operating Overview

An Alternative Test-System-to-Base-Station Timebase Configuration

An Alternative Test-System-to-Base-Station Timebase Configuration

 

Chapter 1 describes the most common method of connecting timebases between

 

the Test System and the base-station-under-test. This section shows an alternative

 

way of connecting the timebases using the CDMA TIMEBASE IN port of the

 

CDMA Cellular Adapter (rather than the rear-panel SYNTH REF IN port).

Steps

1 Connect the timebases as shown in figure 25. Note the connections from the BNC “tee”

 

on the Test Set’s 10 MHz REF OUTPUT to both the Cellular Adapter and the PCS

 

Interface.

 

 

NOTE:

This figure does not illustrate all rear-panel connections between the Cellular Adapter and

 

Test Set. Refer to the Cellular Adapter User’s Guide to verify these connections.

 

 

2From the main menu, select Configuration Information Menu.

3Note the selection for the Base Station Reference To field. If it is set to SYNTH REF IN, scroll down to the line and press the knob to change it to read CDMA TB IN. Otherwise, you may skip this step.

4Note the selection for Base Station Reference Freq. If it does not match the timebase frequency supplied by the base station (typically 19.6608 MHz or

10 MHz), scroll to the line, press the knob, and select the appropriate value.

5To return to the main menu, press the Main Menu (k5) key.

Notes

The timebase settings you made in the steps above will not be saved unless you

 

use the Save Info to Memory feature. See "Saving Configuration Information

 

to Memory" on page 54.

60