How Do I Make an Out-of-Synch Handling of Output Power Measurement?
Last updated: January 15, 2009
This section is only applicable to the lab application.
Measuring 3GPP TS 34.121 5.4.4 Out-of-Synchronization Handling of Output Power
Connect the Test Set, Spectrum Analyzer and UE
- Connect the UE to the test set's RF IN/OUT port and to the spectrum analyzer's RF INPUT port via an RF splitter.
- Connect the test set's rear panel TRIG OUT port to the spectrum analyzer's TRIGGER IN port.
Configure the Spectrum Analyzer
This example uses an Keysight E4443A PSA Series Spectrum Analyzer.
-
Press the
MODE
key. Select
Spectrum Analysis. -
Press the
FREQUENCY
key. Set
Center Freqto the appropriate "mid range" frequency for your UE's operating band, as specified by 3GPP TS 34.108 5.1.1 (for example, for operating band I,1950.0 MHz). -
Press the
Amplitude
key.
-
Select
Moreto move to the2 of 3menu. SetREF Lvl OFFstto9 dBto account for the loss due to the RF splitter (or to the appropriate value for your test setup). -
Select
Moreto move to the1 of 3menu. SetRef Levelto-30 dBm(or to the appropriate level for your test setup to allow accurate measurement of the UE's off power).
-
Select
-
Press the
SPAN
key and select
Zero Span. -
Press the
Det/Demod
key. Set
DetectortoManand chooseAverage (Log/RMS/V)(this also sets BW/Avg :Avg/VBW TypetoPwr Avg (RMS)). -
Press the
BW/Avg
key. Set
Res BWto5 MHz. - Press the Sweep key.
-
Press the
Trig
key and select
Ext RearorExt Front.
Configure the Test Set
-
Set the
RF IN/OUT Amplitude Offsetto-9 dB(or to the appropriate value for your test setup) to account for the loss due to the RF splitter (press the SYSTEM CONFIG key, then selectRF IN/OUT Amptd Offset( F5 )). - Set the downlink channel:
-
Set
Cell Parameters.Test Application: Press
Cell Parameters( F2 ).
Lab Application: PressCell Info( F2 ), thenCell Parameters( F2 ).
( from theCall Control 2 of 5menu)-
Set
N313 Successive Out-Of-Sync Reception Max
to
S200. -
Set
T313 Out-Of-Sync Reception Timer
to
15 s. -
Set
N315 Successive In-Sync Reception Counter
to
S1.
-
Set
N313 Successive Out-Of-Sync Reception Max
to
-
Select
Generator Info( F3 ). SelectConnected DL Channel Levels( F4 ). -
Set
Trigger Output Setup
(
F6
) to
Measurement Generated. -
Establish a 12.2k
RB Test Modeconnection between the UE and test set (see How Do I Set Up a Call and Make a Connection? ). -
Set
UE Target Power
(
F7
on the
Call Parms 3 of 3menu) to28 dBm. -
Select
UL CL Power Ctrl Parameters( F8 ). Set UL CL Power Control Mode toAll Up bits. -
Set
Cell Power
(
F7
on the
Call Parms 1 of 3menu) to-61 dBm. -
Select
Generator Info( F3 on theCall Control 2 of 5menu) and set AWGN Power ( F5 ) to-60dBm.
Initiate the Measurement from the Test Set
-
Press the
Measurement selection
key and choose
Out-of-Synch Handling of Output Power. -
Select
Out-of-Sync Power Setupand set the parameters as needed. The default values are those specified by 3GPP TS 34.121 5.4.4. SelectClose Menu( F6 ). - Press the START SINGLE key.
View the Measurement Results on the Spectrum Analyzer
A typical result is shown below.
Return Test Set Settings to Their Pre-Measurement Values
If desired, when you have completed the measurement, select
End Call
(
F3
) and return the following settings to their pre-measurement values:
-
Set
Cell Parameters.Test Application: Press
Cell Parameters( F2 ).
Lab Application: PressCell Info( F2 ), thenCell Parameters( F2 ).
( from theCall Control 2 of 5menu) -
Select
Generator Info( F3 ). SelectConnected DL Channel Levels( F4 ). -
Set
Trig Output Setup( F6 ) toSys Frame Clock. -
Select
UL CL Power Ctrl Parameters( F8 ). SetUL CL Power Ctrl ModetoActive bits. -
Set
UE Target Power( F7 on theCall Parms 3 of 3menu) as desired. -
Set
Cell Power( F7 on theCall Parms 1 of 3menu) as desired. -
Select
Generator Info( F3 on theCall Control 2 of 5menu) and setAWGN Power( F5 ) as desired.