Track Amplitude (802.16 OFDMA)
: Selected ()
Cleared ()
specifies whether the VSA tracks amplitude changes in the pilot subcarriers. When selected, the Common Pilot Error trace will show the amplitude tracking in the magnitude portion of the trace.
IEEE Institute of Electrical and Electronics Engineers. A US-based membership organisation that includes engineers, scientists, and students in electronics and related fields. The IEEE developed the 802 series wired and wireless LAN standards. Visit the IEEE at http://www.ieee.org 802.16 OFDMA performs demodulation relative to the data in pilot carriers embedded in the signal. These pilot carriers replace data-carrying elements of the signal and allow some kinds of impairments to be removed or "tracked out".
Many impairments will be common to all pilot carriers and can be measured and displayed as "common pilot error".
In addition, several specific tracking functions can be individually switched on and off in the demodulation performed by the 89600 software. This is a very useful troubleshooting approach, since modulation errors can be examined with and without the benefit of particular types of pilot tracking.
When is selected, the VSA applies pilot subcarrier amplitude error correction to the pilot and data subcarriers. This is in addition to Track Phase and Track Timing error correction if selected.
Measurement TIP
Track Amplitude can be used to correct Zone Boosting compensation impairments caused by inconsistent Subchannel Group Bitmask configurations.
See Also
