User`s guide

398 Chapter 15

W-CDMA Uplink Digital Modulation for Receiver Test

Overload Testing with Multiple PRACHs—Multiple ESGs

With the advanced feature of transmitting multiple PRACHs, you can perform base

transceiver station overloading using two ESGs. This gives you the capability of transmitting

up to 16 UEs. When the Frame Sync Trigger signal is used for both ESGs, they will

synchronize to within one chip of the base station frame synchronization signal. When ESG 2

is synchronized using the ESG Sync Pulse signal, you may experience an additional half chip

delay from ESG 2. Figure 15-34 shows the multiple ESG setup and Table 15-2 list the signals

shown in the drawing and their respective ESG rear panel connections.

Figure 15-34 Multiple ESG Setup