R&S CMW-KG4 Series, Руководство пользователя, Страница: 20 / 988

WCDMA Signaling
R&S
®
CMW-KG4xx/-KM4xx/-KS4xx
20 User Manual 1173.9657.02 ─ 11
For a detailed example of a connection setup see chapter 2.3.1.2, "Setting up a Con-
nection" , on page 86.
1. Connect your UE to the R&S CMW (see Test Setups ).
2. Open the "WCDMA signaling" firmware application.
3. Configure the signaling application according to the test to be performed. For TX
measurements it is recommended to disable measurement reporting.
4. To turn on the DL signal, click/press "ON | OFF" and wait until the "WCDMA-UE
Signaling" softkey indicates the "ON" state and the hour glass symbol has disap-
peared.
5. Switch on the UE.
The UE synchronizes to the DL signal and registers (attaches). Note the connec-
tion states displayed in the main view.
6. Set up a UE originated or UE terminated connection.
7. Use the "WCDMA RX Meas" or "WCDMA TX Meas" softkey to switch to the mea-
surement application. The WCDMA RX measurements are provided by the
"WCDMA Signaling" firmware application. The WCDMA TX measurements are
available as option R&S CMW-KM400.
8. Configure and start the measurement.
Order of steps
Measurements provided by the signaling application can also be initiated before turn-
ing on the DL signal. In that case the measurement starts as soon as the preconditions
for the measurement are fulfilled. A BER measurement for instance starts when a suit-
able RMC connection has been set up.
2.2.3 Reduced Signaling Mode
In the default mode (no reduced signaling) the "WCDMA signaling" application emu-
lates a UTRAN cell and generates a downlink WCDMA signal. The UE can synchron-
ize to the downlink signal, register to the Circuit Switched (CS) domain and attach to
the Packet Switched (PS) domain. After registration/attach you can set up a connec-
tion.
In the reduced signaling mode, the R&S CMW also provides a WCDMA downlink sig-
nal, but it does not transfer layer 3 messages. There is no dialog between instrument
and UE. No registration or attach procedure is performed and no call connection is set
up, so that test times are reduced considerably. Only test mode connections are possi-
ble.
To use the reduced signaling mode ensure that the UE synchronizes to the received
downlink signal and transmits an uplink WCDMA signal with correct timing relative to
the downlink signal (1024 chips offset between DL DPCH and UL DPCH). The signal
must contain all channels usually present during an established connection. Configure
General Description
深圳德标仪器
135-1095-0799