Chapter 14: Configuration Guide (CLI)
Configuring XPIC (CLI)
phn-3963_004v000
Page 14-209
Note
To measure the second carrier, leave the Voltmeter connected to the BNC connector. In
the Radio Parameters page of the Web EMS (
), change the RSL Connector
Source field from PHYS1 to PHYS2 (or vice versa). The BNC connector will now
measure RSL from the other carrier.
o
Read the XPI by going to radio view and entering one of the following commands:
radio [x/x]>modem pm-xpi show interval 15min
radio [x/x]>modem pm-xpi show interval 24hr
6.
The XPI should be at least 25dB. If it is not, you should adjust the OMT assembly on the back
of the antenna at one side of the link until you achieve the highest XPI, which should be no less
than 25dB. Adjust the OMT very, very slowly in a right-left direction. OMT adjustment requires
very fine movements and it may take several minutes to achieve the best possible XPI. It is
recommended to achieve XPI levels between 25dB and 30dB.
7.
Enable all four radio carriers and check the XPI levels of both carriers at both sides of the link
by going to radio view and entering one of the following commands:
radio [x/x]>modem pm-xpi show interval 15min
radio [x/x]>modem pm-xpi show interval 24hr
All four carriers should have approximately the same XPI value. Do not adjust the XPI at the
remote side of the link, as this may cause the XPI at the local side of the link to deteriorate.
Note
In some cases, the XPI might not exceed the required 25dB due to adverse
atmospheric conditions. If you believe this to be the case, you can leave the
configuration at the lower values, but be sure to monitor the XPI to make sure it
subsequently exceeds 25dB. A normal XPI level in clear sky conditions is between 25
and 30dB.
Configuring the Radio Carriers for XPIC (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