_Measurement_1.gif){kind=spacer}
Last updated: 2014-11-28
Transmit ON/OFF Power (TOOP) Measurement Description
Transmit ON/OFF Power (TOOP) Measurement Parameters
Transmit ON/OFF Power (TOOP) Measurement Results
Transmit On/Off Power (TOOP) measurement is to check whether the RRC filtered mean power versus time meets the specified mask. The 3GPP standard TS 34.122 Section 5.4.4 defines the TOOP time mask as the ramping time allowed for the UE between transmit OFF power and transmit ON power.
The test set measures three timeslots excluding the leading and the laging guard period (See Transmit ON/OFF Power). The transmission period refers to the burst without guard-period for a single transmission slot (from chip 0 to 847). The chip 0 refers to the first chip in the transmission period); Mask is applied to the OFF Power for the Range 1, 2 or 3 respectively.
Please be noted that specific Hardware Requirements is required in order to get accurate measurement results for the Transmit On/Off measurement.
*If the transmission slot (Time Slot S) is TS1, then the Range 1 starts at the -160th chip. Otherwise, the Range 1 starts at the -864th chip.
This measurement requires the calibration data of the measurement receiver path gain, which are part of the results of the measurement calibration, see Calibrate Measurements.
Multi-Measurement Count: see Multi-Measurement Count.
Trigger Arm: see Trigger Arm.
Trigger Source: see Trigger Source.
Trigger Delay: see Trigger Delay.
Measurement Timeout: see Measurement Timeout.
Trace State: specifies whether the trace result is available.
Off Power Mode: specifies the way to get the power result of the three ranges. This parameter can be set to either Average or Worst. If it is set to Average, the power result for each range is the average chip power of the range; If it is set to Worst, the power result for each range is the highest chip power in the range.
Off Power Range 1|2|3 Limit: specifies the OFF Power mask limit for Range 1|2|3.
OFF Power results associated with the Range 1|2|3:
Level: the average or worst power for Range 1|2|3 based on the setting of OFFPow Mode.
Pass/Fail: specifies whether the power result for each range is out of the Off Power Range Limit.
Offset Power: Up to 12 offset can be set in order to retrieve specific offset average or worst power. The offset can be set from the front panel or by the command of SETup:TOOPower:TIME[:OFFSet].
Averaged ON Power: the average RRC filtered mean power of the transmission period.
Trace Power: the chip power of the whole trace is available if the Trace State is ON.
The measurement results can be displayed in either numeric or graphical form. When the Trace State is set to On, the graphical trace result is viewable for chips from -864 to 1711 (see below). When a limit line (in green) is exceeded in the range, the range status changes from "Pass" to "Fail."
_Measurement_2.jpg){kind=spacer}
The level into the test set's RF IN/OUT connector must be in the range of -65 dBm to +28 dBm. The measured signal level is expected to be within 9 dB of the expected power.
For Non-HSDPA channel type, the frequency of the measured signal should be within 20KHz from the expected receiver frequency; For HSDPA channel type, the frequency of the measured signal should be within 2KHz from the expected receiver frequency.
GPIB Commands: SETup:TOOPower, FETCh:TOOPower