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LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
19
User Manual 1173.9628.02 ─ 16
2.2.2 Initiating Signaling Tests
The signal generator of the "LTE signaling" application is controlled like any realtime
signal generator, see
chapter 2.4.2, "Signaling Control"
The LTE downlink signal is turned on as long as the "LTE Signaling" softkey indicates
the "ON" state. After switching on, wait until the hour glass symbol has disappeared.
When DL signal transmission has been turned on, the connection states can be con-
trolled via hotkeys at the R&S
CMW and via actions at the UE.
The default settings of the R&S
CMW generally ensure a DL signal with suitable char-
acteristics for connection setup. The most important settings can be modified directly in
the main view.
Performing measurements
The required settings vary depending on the measurement to be performed. However,
the following general procedure is applicable to most measurements.
1. Connect your UE to the R&S
CMW (see
2. Open the "LTE signaling" firmware application.
3. Configure the signaling application according to the test to be performed.
4. To turn on the DL signal, press ON | OFF and wait until the "LTE Signaling" softkey
indicates the "ON" state and the hour glass symbol has disappeared.
5. Switch on the UE.
The UE synchronizes to the DL signal and attaches. Note the connection states
displayed in the main view.
6. If the RRC connection has been released after the attach, set up a connection.
You can configure, whether the RRC connection is kept or not, see
7. To switch to the measurement application, press the "LTE TX Meas" or "LTE Ext
BLER" softkey. The LTE extended BLER measurement is provided by the "LTE
Signaling" firmware application. The LTE TX measurements are available as option
R&S CMW-KM500/-KM550.
8. Configure and start the measurement.
If the UE fails to attach
Check the following R&S
CMW settings:
●
The "Duplex Mode" must be supported by the UE.
●
The "Frequency" of the generated DL signal must be within the frequency band
supported by the UE.
●
The "Downlink Power Levels", especially the "RS EPRE" must be sufficient so that
the UE under test can receive the DL signal.
General Description
深圳德标仪器
135-1095-0799