User`s guide

Base Station Emulator Mode 3

E6651A User’s Guide 35

Uplink Padding Test

Upon establishing two way communications, control and

broadcast messages are transmitted between the Test Set and

the SS, though no user traffic is present. The E6651A can

test the transmitter performance of the SS by invoking the

transmission of uplink data from the SS.

To perform the Uplink Padding Test:

1 Select the Uplink Padding Test Mode: After establishing

two way communications, press in the BSE Mode

Selection Menu to select UL Padding Test. is a

toggle function.

2 Run the Uplink Padding Test: Press in the

Selection Menu. The measurement screen is frozen and the

product continuously demodulates the uplink signal.

3 Perform Modulation Analysis: While the Uplink Test is in

progress, the Test Set can analyze the uplink signal's

quality and performance. Press Measure on the Front

Panel, followed by in the Selection Menu. The

“Uplink SYNC Detection” message is displayed, indicating that

uplink synchronization processing is in progress. When

this process is complete, the Measurement Window in

Figure 13 is displayed. Refer to “Signal Analyzer Mode" on

page 57 for more details of analyzer functions.

Figure 13 Uplink Test Modulation Analysis Window

Test Mode

Run Test

Modulation