LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
89
User Manual 1173.9628.02 ─ 16
b) For "Call Type", use the default value "Audio".
Configure the "AMR Type" and the "AMR Codec" compatible to your UE.
c) Press the "Call" button to initiate the call.
The state "Calling" is displayed, followed by the state "Ringing".
d) Accept the call at the UE.
The state "Established" is displayed.
The "Info" area indicates the successful call setup.
2.3.3.3
Checking the Audio Transmission
This section describes a simple functional check of the audio transmission in uplink
and downlink direction. You need the handset R&S CMW-Z50 for this check.
1. Connect the handset to AF 1 IN and AF 1 OUT.
2. Open the "Audio Measurement 1" view:
On the task bar, press "Audio Measurement 1".
3. At the top, select the scenario "External Analog Speech Analysis".
4. Press the "Input Level" hotkey and enter 0.05 V.
5. Press the "Output Level" hotkey and enter 1 V.
6. To check the downlink direction, speak into the handset microphone and listen to
the UE speaker. The speech should be audible at the UE speaker after a small
delay.
7. To check the uplink direction, speak into the UE microphone and listen to the hand-
set speaker. The speech should be audible at the handset speaker after a small
delay.
8. Disconnect the handset.
Application Sheets
深圳德标仪器
135-1095-0799