Last updated: January 18, 2010
During remote operation of the Power versus Time measurement you should configure the trigger arm to single, see SETup:PVTime:CONTinuous[:SELected] .
If the trigger arm is not set to single, the measurement may not return a result. When trigger arm is continuous the measurement rearms itself and starts another measurement cycle, during remote operation the FETCh query may not be synchronized to the measurement cycle, see Measurement States .
If the Trigger Source is set to RF Rise and the signal measured is not burst modulated the measurement will wait until aborted or timed out.
If the input signal does not rise above the threshold set at 20 to 30 dB below the Expected Power, see Expected Power Control there is not enough power to generate an RF Rise trigger so the measurement may hang.
When you want to perform a Power versus Time measurement on a GPRS or EGPRS mobile which supports a two uplink multislot configuration, there are restricted ranges for the power offset times to ensure that a valid result is returned. This restriction is a function of the expected power for each burst and the guard period as shown in the table below.
See Integrity Indicator .
If over range (5) is returned; the PvT input power has exceeded the test set's internal sampler maximum value during some part of the sampling or the input power has exceeded the calibrated range of the test set's power detector for the RF Range setting. RF Range is automatically set based on the input power setting. Input power is a combination of amplitude offset and expected power settings. See Mobile Station Receiver Example .
If the signal has both over range and under range conditions only the over range (5) will be indicated.
If under range (6) is returned; the PvT Transmit Power result is more than 10 dB below the expected input power level. Under range is also indicated if, the input power is more than 2 dB below the calibrated range of the test set's power detector for the RF Range setting. RF Range is automatically set based on the input power setting. Input power is a combination of amplitude offset and expected power settings. See Mobile Station Receiver Example .
Sync Not Found (11) will be returned if the measurement Burst Synchronization is set to Midamble synchronized and the Expected Burst pattern is not set to TSC0 through TSC7, or RACH. Note that the Expected Burst parameter is only used when the test set's operating mode is set to Test Mode or when the Cell Activated state is set to Off. See CALL:BURSt:TYPE[:SELected] .
Sync Not Found (11) is returned if a valid midamble cannot be found when measuring two adjacent uplink bursts. The measurement still completes on a best effort basis using RF Amplitude synchronization. See Burst Synchronization of Measurements .
Parameter Error (21) is returned if you measure more than 2 uplink bursts when Burst Capture Range is set to Single.
Parameter Error (21) is returned if you set a value outside the restricted range of offset times when testing a GPRS or EGPRS mobile station with a two uplink multislot configuration. For more details, see Time Offset Range Restrictions for GPRS and EGPRS Mobiles .
Unsupported Configuration (22) is returned if the multislot configuration of more than 2 uplink bursts is selected and the Burst Capture Range is set to Single.
Unsupported Configuration (22) is returned if you measure GSM RACH burst when Burst Capture Range is set to All.