Cambium Networks PTP 820 Series User Manual page 751

Chapter 15: Configuration Guide (CLI)
Configuring XPIC (CLI)
Cross Polarization Interference Canceller (XPIC) is a feature that enables two radio carriers to use the same
frequency with a polarity separation between them. Since they will never be completely orthogonal, some signal
cancelation is required.
In addition, XPIC includes an automatic recovery mechanism that ensures that if one carrier fails, or a false signal is
received, the mate carrier will not be affected. This mechanism also assures that when the failure is cleared, both
carriers will be operational.
This section includes:
•
Prerequisites for XPIC (CLI)
•
Configuring the Carriers (CLI)
•
Creating an XPIC Group (CLI)
•
Performing Antenna Alignment (CLI)
•
Deleting an XPIC Group (CLI)
Related topics:
•
Configuring the XPI Thresholds and Displaying the XPI PMs (CLI)
Prerequisites for XPIC (CLI)
•
ForPTP 820F, XPIC requires a MultiCore RFU-D.
•
For PTP 820G, each radio interface must be connected to the same type of RFU.
•
Each radio carrier must be assigned the same script. The script must be an XPIC script. The script must be an
XPIC script. The letter X (XPIC) or N (Non-XPIC) in the script name indicates whether or not the script supports
XPIC. For example:
o
The script mdN_A2828X_102_1205 supports XPIC.
o
The script mdN_A2828N_123-1005 does not support XPIC.
Configuring the Carriers (CLI)
To configure the radio carriers:
1. Configure the carriers on both ends of the link to the desired frequency channel. Both carriers must be
configured to the same frequency channel.
2. Assign XPIC (CCDP operational mode) support-enabled script to both RMCs on both ends of the link. Each
RMC must be assigned the same script. See Assigning an MRMC Script to a Radio Carrier
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Configuring XPIC (CLI)
(CLI).