Chapter 3: Configuration Guide
Configuring XPIC
phn-3965_006v002
Page 3-103
Figure 113
XPIC Edit Page
3.
In the
Admin state
field, select
Enable
.
4.
Click
Apply
, then
Close
. The XPIC group is enabled.
Performing Antenna Alignment for XPIC
1.
Align the antennas for the first carrier. While you are aligning these antennas, mute the second carrier. See
Configuring the Radio Parameters
2.
Adjust the antenna alignment until you achieve the maximum RSL for the first-
carrier link (the “RSL
wanted
”).
This RSL should be no more than +/-2 dB from the expected level. Record the RSL of the first carrier as the
RSL
wanted
.
3.
Measure the RS
L of the second carrier and record it as the “RSL
unwanted
”.
4.
Determine the XPI, using either of the following two methods:
o
To calculate the XPI, subtract the RSLunwanted from the RSLwanted.
o
Read the XPI from the Modem XPI field of the Radio Parameters page in the Web EMS. See Viewing the
Radio Status and Settings.
5.
The XPI should be between 25dB and 30dB. 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 slowly in a right-left direction. OMT adjustment requires very fine movements and it may take
several minutes to achieve the best possible XPI.
Note
As an extra step, to check the veracity of the initial measurements, you can mute the first carrier and
unmute the second carrier on the upper carriers on both sides of the link. Then measure the RSL of
the second carrier link (the “RSL
wanted
”), measure the RSL of the first carrier (the “RSL
unwanted
”) and
determine the XPI. The XPI should match the XPI with the second carriers muted.
Summary of Contents for PTP 820 Series
Page 1: ...User Guide ...
Page 49: ...Chapter 1 Introduction Configuration Tips phn 3965_006v002 Page 1 3 ...
Page 162: ...Chapter 3 Configuration Guide System Configurations phn 3965_006v002 Page 3 4 ...
Page 294: ...Chapter 4 Unit Management Upgrading the Software phn 3965_006v002 Page 4 19 5 Select FTP ...
Page 713: ...Chapter 14 Getting Started CLI Configuring the Activation Key CLI phn 3965_006v002 Page 14 18 ...
Page 731: ...Chapter 14 Getting Started CLI Operating in FIPS Mode CLI phn 3965_006v002 Page 14 36 ...