COBHAM Sea Tel 9711-56 IMA C Band, Installation Manual

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Optimizing Cross-Pol Isolation Sea Tel 9711-56 IMA
15-2
EAR Controlled - ECCN EAR99
6. Access the Reflector Configuration
screen.
7. Change the “Linear Offset” value by the
amount of difference recorded in step 4.
Examples:
Skew was 0.0, you increased it to 2.5 to optimize
TX polarization. You set Skew back to zero and
go to the Reflector Configuration screen where
you find Linear Offset to be 0.0, so you increase
Linear Offset to 2.5 degrees and click Save.
Skew was 3.0, you decrease it to 1.0 to optimize
TX polarization. You set Skew back to 3.0 and go
to the Reflector Configuration screen where you
find Linear Offset to be 0.0, so you set Linear
Offset to minus 2 (-2.0) degrees and click Save.
8. Double check with the NOC to assure
that cross-pol is still optimized.
9. Conduct any other testing as directed by
the NOC (ie P1dB compression).
15.1. Cyber Security Caution
Sea Tel Antenna systems are not intended to be connected directly to the Internet. They must be connected
behind a dedicated network security device such as a firewall. In addition, we highly recommended that you
change default passwords. This is an extremely important consideration that must be taken into account as
part of commissioning procedures as attackers with malicious intent (after easily obtaining default passwords
and identify internet-connected systems) can be rendered a system inoperable.
For clarification purposes, the factory default Passwords/Configurations are only intended for initial
production testing/verification purposes and it is an assumed responsibility of the installing partner to change
and record the login credentials and is shared only with persons whom are directly responsible for
operation/maintenance of the system. Instructions on how to change passwords may be located within the
system manual.