498 Chapter 16
W-CDMA Uplink Digital Modulation for Receiver Test
Overload Testing with Multiple PRACHs—Multiple ESGs
Table 16-2 Multiple ESG I/O Signals and Connections
Signal Signal Type Rear Panel
Connector
Input 10 MHz Reference
This ensures that both ESG’s timebase are phase
aligned with the BTS reference.
10 MHz IN
Frame Sync Trigger
This aligns the ESG’s frame timing with the BTS. This
ensures that the BTS can detect the beginning of a
PRACH signal radio frame.
PATT TRIG IN
PRACH Start Trigger
This is the trigger signal for ESG 1 to begin its
PRACH transmission.
BURST GATE IN
ESG Sync Pulse (only for ESG 2)
This signal lets ESG 2 synchronize with the BTS
through ESG 1. This is used if the Frame Sync Trigger
cannot be split between the two ESGs. This may cause
an additional one half chip delay in ESG 2.
PATT TRIG IN
PRACH Start Trigger Echo Back (only for
ESG 2)
This signal triggers ESG 2 to start its PRACH
transmission. The PRACH Start Trigger signal can be
used in place of this signal, if it has the power
available to split between the two ESGs. If the
PRACH Start Trigger signal is used, ESG 2’s
synchronization source must be set to the same source
as ESG 1.
BURST GATE IN
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