LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
91
User Manual 1173.9628.02 ─ 16
7. Stop the generator and the measurement:
a) Select the "Analog Meas" softkey and press ON | OFF.
b) Select the "Digital Generator" softkey and press ON | OFF.
Performing a microphone test
In the following test, the analog generator of the audio board feeds a 1000 Hz audio
tone to the microphone of the UE.
The UE encodes the audio signal and modulates the RF signal. It transmits the RF sig-
nal via the already established VoLTE connection to the R&S
CMW.
The R&S
CMW demodulates and decodes the signal. The digital audio measurement
of the audio board analyzes the resulting audio signal.
If the UE has a microphone jack or a headset jack, connect it directly to the AF 1 OUT
port. Alternatively, you can use a speaker and connect it to AF 1 OUT. You could for
example use the speaker of an artificial head.
Fig. 2-31: Test setup for a microphone test
To prepare and execute the microphone test, proceed as follows:
1. Connect the UE microphone to AF 1 OUT.
2. Select the "Digital Meas" tab.
3. Press the "Analog Generator" softkey.
4. Press the "Level" hotkey and enter a value compatible to the microphone input of
your UE, for example 100 mV.
5. Press ON | OFF.
The generator is started. Wait until the softkey indicates the "ON" state.
A 1000 Hz tone is generated and fed to the UE microphone.
6. Select the "Digital Meas" softkey and press ON | OFF.
Application Sheets
深圳德标仪器
135-1095-0799
