User`s guide

404 Chapter 15
W-CDMA Uplink Digital Modulation for Receiver Test
Overload Testing with Multiple PRACHs—Multiple ESGs
2. Press LF Out Waveform > More (1 of 2) > Pulse.
3. Press
LF Out Period > 80 > msec.
This sets the trigger to occur every 80 msec.
4. Press
LF Out Width > 8 > usec.
5. Press
LF Out Amplitude > 3 > Vp.
Three volts was selected because the BURST GATE IN is a CMOS connection.
6. Press
LF Out Off On to On.
Figure 15-37 shows how the LF output display looks after all the steps from this procedure
have been completed.
Figure 15-37 LF Output Setup
You now have two ESG output signals that are transmitting a combined total of 16 UEs. The
BTS can be configured to try and identify each individual PRACH or configured to identify an
individual UE from among the 16 transmitted PRACHs.