User`s guide

Chapter 15 373
W-CDMA Uplink Digital Modulation for Receiver Test
Generating a Single PRACH Signal
Figure 15-18 Displayed ESG Signal
Using the AICH Feature with a Base Transceiver Station
Figure 15-19 shows the AICH feature connection with the AICH being provided by the base
station. While the ESG cannot demodulate an actual AICH signal, the base transceiver
station can be configured to output a TTL trigger signal that is timed with the AICH
transmission. This trigger signal can then be used as the AICH trigger for the ESG to
transmit its message part. Or if you prefer, you can follow the instructions shown in “Setting
Up the LF Output as the AICH Signal” on page 371, and use the ESG’s LF output as the
AICH trigger source.
Preambles
PRACH Message—AICH Received