How Do I Make a Thermal Power Measurement?
Last updated: January 15, 2009
Measuring 3GPP TS 34.121 5.2 Maximum Output Power
- Ensure that you have specified the proper Amplitude Offset for your test setup.
-
Set the downlink and uplink channels:
-
Set
Operating Mode( F1 ) toCell Off. -
Set
DL Channel( F10 ) andUplink Channel( F11 ) to the appropriate "low range" frequencies for your UE's operating band, as specified by 3GPP TS 34.108 5.1.1 (for example, for operating band I,DL Channel=10563andUplink Channel=9613). -
Set
Operating ModetoActive Cell.
-
Set
-
Establish an
RB Test Modeconnection between the UE and test set (see How Do I Set Up a Call and Make a Connection? ). -
Ensure that the
Connected DL Channel Levelsare set to their default values, as required by 3GPP TS 34.121 Table E.3.1 (selectGenerator Info, F3 onCall Control 2 of 5). -
Set
Cell Power( F7 ) to-93 dBm. -
Set
UE Target Power:-
Select
UL CL Power Ctrl Parameters( F8 on theCall Parms 3 of 3menu) and setUL CL Power Ctrl ModetoActive bits. -
Set
UE Target Power( F7 ) to the specified maximum output power for your UE (for example, 21 dBm for power class 4).
The test set then drives the UE to the specified level, while also appropriately ranging its measurement receiver.
-
Select
-
Return to the
UL CL Power Ctrl Parametersmenu ( F8 ) and setUL CL Power Ctrl ModetoAll Up bitsand setUL CL Power Ctrl AlgorithmtoTwo. The test set then drives the UE to transmit at the highest level possible. - Press the Measurement selection key.
-
Select
Thermal Power. -
Select
Thermal Power Setup(F1) and setTrigger ArmtoSingle. SelectClose Menu( F6 ). - Press the START SINGLE key to begin the measurement.
-
Verify that the measured output power is within the range specified by 3GPP TS 34.121 Table 5.2.2 (for example, 21 dBm +/- 2.7 dB for power class 4).
- Repeat the test for "mid range" and "high range" frequencies (perform a Physical Channel Reconfiguration (Inter-frequency Hard Handover) , then repeat steps 11 and 12).