Publication no. 101557
Rev 14.1.1-2
Copyright 2006-2012 – STM Group, Inc.
Critical Alarm : PCU Communication Error
Packets sent : 2
Packets received : 2 [assembled : 3]
Antenna Controller Command/Response Summary
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TrackDisp : 130
The above status shows that the Antenna Controller is detected. This means the mobile VSAT and the
Antenna Controller have established IP connection and are exchanging messages.
Note: Use 'save config' to preserve the changes to the parameter configuration.
Note: VSAT restart is required before the new configuration is activated correctly when
the IP address of the Antenna Controller is changed.
Note: Changing the "periodic-time" parameter does not require a restart, however it
will require the previous time period to elapse before the new one goes into effect.
19.5.4 Configure the Forward Link Entries (Beams)
Once the control of the Mobile Antenna Controller is enabled, the CLI command 'dvb rx show' will
display, for each Forward Link entry (beam), the following four additional parameters:
SatPos: Satellite orbital position in degrees
RxPol: VSAT RX polarization (Horizontal or Vertical)
TxPol: VSAT TX polarization relative to the RX polarization (Cross-Pol or Co-Pol)
SatRot: Satellite polarization rotation angle (polarization skew) in degrees
All four additional Forward Link parameters must be configured; they are not used by the VSAT IDU to
search for the Forward Link, but they are required by the Mobile Antenna Controller to align the antenna
and track the satellite.
Note: Confirm with the Hub operator that the Forward Link beams are configured with
the correct values for satellite position and satellite downlink (TX) polarization.
Once the mobile VSAT locks to a Forward Link beam, the “SatPos” and “RxPol”
configured for that Forward Link entry in the mobile VSAT will be overwritten with the
satellite position and downlink polarization values received in the SI tables.
Use the CLI command 'dvb rx fwdlink' to configure these parameters:
# dvb rx fwdlink <idx> <pri> [<symbrate> [<freq> [<mode> [<popid> [<satpos>
[<rxpol> [<txpol> [<satpolrot>]]]]]]]
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