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Last updated: 2014-11-28
Occupied Bandwidth (OBW) Measurement Description
Occupied Bandwidth (OBW) Measurement Parameters
Occupied Bandwidth (OBW) Measurement Results
As defined by 3GPP TS 34.122 Section 5.5.1, Occupied Bandwidth (OBW) measurement is a measure of the bandwidth containing 99 % of the total integrated power for transmitted spectrum and is centered on the assigned channel frequency. The test set allows the percentage of total integrated power to be adjusted from 70.0 to 99.0%.
According to the standard, the occupied channel bandwidth shall be less than 1.6 MHz.
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.
Percent of Total Integrated Power: the percentage of the total power used in the occupied bandwidth measurement.
Trigger Arm: see Trigger Arm.
Trigger Source: see Trigger Source.
Trigger Delay: see Trigger Delay.
Measurement Timeout: see Measurement Timeout.
Integrity Indicator: see Integrity Indicator.
Occupied Bandwidth: the bandwidth that contains the specified Percentage of Total Integrated Power, the value of which equals to the difference between the upper frequency and the lower frequency.
Lower Frequency : the lower frequency of the occupied bandwidth.
Upper Frequency : the upper frequency of the occupied bandwidth.
The measured signal level is expected to be within 9 dB of the expected power.
Input signal level into the test set's RF IN/OUT connector is between +5 dBm and +28 dBm, in a 1.28 MHz bandwidth.
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:TOBWidth, FETCh:TOBWidth