Last Updated: August 29, 2007
This topic contains the following sections:
How are the Measurements in the Reverse Traffic Channel Measurement Suite Made?
Reverse Traffic Channel Measurement Suite Measurement Parameters
Reverse Traffic Channel Measurement Suite Results Configuration
Reverse Traffic Channel Measurement Suite Measurement Limits
Refer to the individual measurement descriptions for more details on how the measurements contained in the RTCH measurement suite are made. The following measurements are included in the RTCH measurement suite:
RTCH Channel Power (see RTCH Channel Power (CPOW) Measurement Description)
Occupied Bandwidth (see Occupied Bandwidth (OBW) Measurement Description)
TX Spurious Emissions (see TX Spurious Emissions Measurement Description)
Waveform Quality (see Waveform Quality Measurement Description)
The measurement period used for these measurements is 1 power control group (1.25 ms) for a cdma2000 RTCH Channel Power measurement, and 1 slot (1.667 ms) for a 1xEV-DO RTCH Channel Power Power measurement.
This parameter sets the multi-measurement count for the RTCH measurement suite. This value specifies the number of measurements the test set performs and uses to calculate the average result and other statistical results of the measurement set such as Minimum, Maximum and standard deviation. See Statistical Measurement Results.
SCPI command: SETup:CRTChannel:COUNt[:SNUMber][?]
This parameter sets the trigger state to single trigger mode or continuous trigger mode for the RTCH measurement suite.
SCPI command: SETup:CRTChannel:CONTinuous[?]
This parameter sets the trigger source for the RTCH measurement suite.
SCPI command: SETup:CRTChannel:TRIGger:SOURce[?]
This parameter sets the timeout value in seconds for the RTCH measurement suite.
SCPI command: SETup:CRTChannel:TIMeout[:STIMe][?]
This parameter sets the percentage of total integrated power that must be in the Occupied Bandwidth (OBW) Limit of the transmitted spectrum, centered on an assigned channel frequency, that is required for the Occupied Bandwidth measurement to Pass.
SCPI command: SETup:CRTChannel:OBWidth:PERcent:TOTal:POWer[?]
This parameter sets whether the Upper Band Frequency, Lower Band Frequency, and Center Frequency results are returned as absolute RF Frequencies or relative to the Expected Frequency. When this parameter is enabled, relative values are returned. When this parameter is disabled, absolute frequency values are returned.
SCPI command: SETup:CRTChannel:OBWidth:NORMalize[?]
The parameters on the Results Configuration tab allow you to configure the following attributes of the RTCH measurement suite on the test set's front panel:
Enable or disable different measurement result views.
Select whether or not to show each measurement result view on the Summary tab.
Select the order for displaying each measurement result view on the Summary tab.
Select which measurement result views should be expanded on individual tab pages.
This parameter sets the limit at which the measurement will fail if the average Occupied Bandwidth (OBW) result is above this limit.
SCPI command: SETup:CRTChannel:OBWidth:LIMit[?]
This parameter sets whether the test set automatically determines which limits to use, or applies the user defined values. When set to ON, the user specified limits are used. When set to OFF, the test set uses preset limits defined in the standard that are specific to the selected frequency band.
SCPI command: SETup:CRTChannel:TXSPurious:MASK:AUTO[?]
This parameter sets the user defined mask limits of the lower and upper Adjacent Offsets. Figure 1 in the TX Spurious Emissions measurement description shows that these two offsets, as well as the Alternate Offsets, start at the edge of the 30 kHz measurement filter used to make the measurement at these offsets. The setting for this parameter is only applied when the Limit Configuration parameter is set to Off.
SCPI command: SETup:CRTChannel:TXSPurious:MASK:MANual[?]
This parameter sets the user defined mask limits of the lower and upper Alternate Offsets. Figure 1 in the TX Spurious Emissions measurement description shows that these two offsets, as well as the Adjacent Offsets, start at the edge of the 30 kHz measurement filter used to make the measurement at these offsets. This parameter is only applied only applied when the Limit Configuration parameter is set to Off.
SCPI command: SETup:CRTChannel:TXSPurious:MASK:MANual[?]
Refer to the following individual measurement result descriptions for details on what each measurement in the RTCH measurement suite returns:
The RTCH measurement suite will complete and meet its measurement accuracy specifications when the measured signal is within ±9 dB of the expected input level with ≤ 7.5 dB crest factor, and when the signal meets the following input signal conditions:
RTCH Channel Power (CPOW) measurement
Input signal level into the test set's RF IN/OUT connector is between -61 dBm and +30 dBm, in a 1.23 MHz bandwidth.
Occupied Bandwidth (OBW) measurement
Input signal level into the test set's RF IN/OUT connector is between +5 dBm and +28 dBm, in a 1.23 MHz bandwidth.
TX Spurious Emissions (TXSP) measurement
Input signal level into the test set's RF IN/OUT connector is between 0 dBm and +30 dBm, in a 1.23 MHz bandwidth.
Waveform Quality (WQU) measurement
Input signal level into the test set's RF IN/OUT connector is between -25 dBm and +37 dBm, in a 1.23 MHz bandwidth.
Triggering choices available for the RTCH measurement suite are RF Generator ARB, Immediate, and External.