Checking XPD Value and XPD Alignment for XPIC Links

Checking XPD Value and XPD alignment for XPIC Links Power up V link and align to obtain planned RX level ..Verify XPD to be greater than 26dB

1. Turn on far end V transmitter. 2. Turn on near end V and H transmitter. 3. Measure the RX level of both H and V in near end. The difference between them is XPD and should be greater than 26dB. 4. Follow the same procedure by turning on both V and H transmitter far end and only V transmitter in near end. 5. If the XPD is less than 26dB then XPD optimization to be performed. 6. These step needs to be followed with each of the antennas at both the sides one at a time so that signal from 1 antenna does not interfere with the signals from other antenna.

Example: XPIC configuration 2+0

Vertical RSL

Vertical XPD far-end off

Horizontal RSL

Horizontal RSL

Horizontal XPD

Vertical RSL