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WCDMA Signaling
R&S
®
CMW-KG4xx/-KM4xx/-KS4xx
17
User Manual 1173.9657.02 ─ 11
TX/RX modules at different Signaling Units Wideband (SUWs). This implies that the
instrument must be equipped with two SUWs.
Many UEs provide several connectors, but only one of them can be used for WCDMA.
Typical scenarios:
●
The UE provides only one connector for WCDMA:
Use a bidirectional RF connector at one SUW for the first uplink and downlink sig-
nal and a separate bidirectional RF connector at another SUW for the second
uplink and downlink signal. Connect both RF connectors to an external combiner
and connect the combiner to the UE.
●
The UE provides two connectors for WCDMA:
Use a bidirectional connector at one SUW for the first uplink and downlink signal
and a separate bidirectional connector at another SUW for the second uplink and
downlink signal.
The following figure illustrates this example.
Fig. 2-3: Test setup using two connectors at instrument side and UE side
2.2.1.4
Test Setup for External Fading Scenarios
In order to superimpose fading on the baseband signal, you can integrate an R&S
AMU200A into a test setup. The R&S AMU200A must be connected to the digital I/Q
interface of the R&S
CMW. At least one I/Q board must be installed at the R&S
CMW
for that purpose (option R&S CMW-B510x/-B520x).
All connections between R&S
CMW and R&S AMU200A are established via the rear
panels of the instruments.
The following figure shows a setup with two downlink paths using the first I/Q board
(DIG IQ 1 to 4).
General Description
深圳德标仪器
135-1095-0799