Measuring Channel Power
General Procedure
- Connect the access terminal to the test set's front panel RF IN/OUT connector and power it on.
- Wait for the access terminal to open a session and then open an RTAP (for subtype 0 physical layer) or RETAP (for subtype 2 physical layer) data connection for AT's transmitter test. For details, see How Do I Open a Session and Test Data Connection? .
-
Set the
RTAP Rate( F12 ) on theCall Parms 1 of 3menu as needed if during an RTAP connection, or set theR-Data Pkt Size( F12 ) on theCall Parms 1 of 3menu as needed if during an RETAP connection. - Initialize the channel power measurement:
-
Select Channel Power Setup (
F1
) to access the
Channel Power Setupmenu. From this menu you can configure measurement parameters such asMulti-Measurement Count,Trigger Arm, etc. (see Channel Power Measurement Parameters for details on these parameters). For statistical measurement results, highlight theMulti-Measurement Countparameter and press the ON key. The number of averages will default to 10. You can change the number as desired.
-
Select
Close Menu( F6 ) to close theChannel Power Setupwindow. -
From the
Call Parmsmenu, configureCell Power( F7 ), as needed. - Measure channel power:
A typical measurement result (for subtype 0 physical layer) is shown below:
A typical measurement result (for subtype 2physical layer) is shown below:
Testing 4.3.5 Minimum Controlled Output Power
For details on performing the steps below, see the General Procedure above.
-
For Subtype 0 or 1 Physical Layer, set up a Test Application session and open an RTAP connection with the
RTAP Rateset to9.6 kbps. For detailed procedure on how to open an RTAP session and connection, see How Do I Open a Session and Test Data Connection?For Subtype 2 Physical Layer, set up a Test Application session and open an RETAP connection with the following setups. For detailed procedure on how to open an RETAP session and connection, see How Do I Open a Session and Test Data Connection? .
-
Set the
R-Data Pkt Size( F12 onCall Parms 1 of 3) to 256 bits. -
Set the
Reverse Data Transmission Modeunder theApplication Config( F10 onCall Parms 1 of 3) menu toHigh Capacity. -
From the Power Parameters Info menu (see
How Do I Change Channel Gain/Traffic Info Parameters?
for how to access), set the
256-bit High Capacity Termination Targetto3(4 sub-frames, resulting in 16 slots). (NOTE: You do not need to set this parameter unless its default value (3) is changed. Changing the setting results in an open data connection closed and a session re-negotiation. Once this happen, you need to re-open the connection.)
-
Set the
- Initialize the channel power measurement.
-
Set the
Call Drop TimertoOff( F9 on theCall Parms2 of 3menu) to keep the test set from closing the connection based on the very low output power level of the access terminal. -
Set Î
or
(
Cell Power, F7 on theCall Parms 1 of 3menu) to -25 dBm/1.23 MHz. -
Set
Rvs Power CtrltoAll Down bits( F7 on theCall Parms 2 of 3menu) to transmit continuous down ('1') power control bits. -
Measure channel power.
If Under Range is posted, it indicates that the measured power is below -61 dBm or is less than -9 dB below the expected power level of the receiver. When this happens, you should manually adjust the test sets receiver power and then repeat the test. (Setup procedure: onNOTE Call Parms 1 of 3menu, selectManualin theRcvr Power Ctrl( F8 ), then set theReceiver Power( F9 ) to a value close to the measured value being displayed on the Channel Power measurement screen.)
- When you have finished the testing, be sure to set the
Call Drop Timerback toOnand theRvs Power Ctrlback toActive Bitsto ensure that subsequent operation is successful.Related Topics
4.3.5 Minimum Controlled Output Power
Channel Power Measurement Description
- When you have finished the testing, be sure to set the