Chapter 16 561
W-CDMA Uplink Digital Modulation for Receiver Test
W-CDMA Uplink Concepts
Figure 16-77 PRACH Signal Alignment
PRACH Processing Output This signal indicates the status of PRACH signaling.
The signal is high until the configured number of
PRACH repetitions is complete. A 0 indicates the
PRACH signal is off. A 1 indicates the PRACH
signal is generating. The signal’s state changes in
accordance with access slot resolution.
RPS19
Sub-Channel Timing Output Indicates sub-channel timing, which is specified
through the user interface. A PRACH data stream
must begin on the leading edge of one of these
pulses.
RPS17
10 ms Frame Pulse Output Indicates the frame boundaries for SFN. RPS6
80 ms Frame Pulse Output Indicates the frame boundaries for SFN
mod 8 = 0.
RPS20
Preamble Pulse Output Indicates the start for each preamble access slot. RPS21
Message Pulse Output Indicates the start of an access slot when the message
part is going to be transmitted.
RPS22
PRACH Pulse Output Indicates the beginning access slot boundary of a
PRACH repetition (preamble only or
preamble+message).
RPS23
Table 16-8 Signal Descriptions for PRACH Mode (Continued)
Signal Label Input/
Output
Signal Description SCPI
Syntax
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