Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 262)

Network MN/22156, rev 12
4-44 VMS User Guide
Set the Group ID for this Remote to match that of the associated HCC
(CDD-880). Valid range is 0 to 255.
Base Power
The Base Power is the power level that is used by the Remote modem to
transmit the Aloha ECM signal to the Hub, prior to the switch to dSCPC
mode. This level is determined for the modem from the site link budget
calculations, and must be calibrated with the satellite provider.
Valid range is -40.0 to 0.0 dBm.
Power Hunt Enable
Power Hunt is a transmission power control feature for the Remote
modulator that functions while the Remote is in Entry Channel mode. This
parameter provides compensation for instances when the initial (baseline)
power value is insufficient or during periods of impaired transmission, and
assists in maintaining return link integrity.
When a predetermined number of consecutive burst acknowledgements from
the Remote are missed at the Hub, the power output is increased in 1 dB
increments, up to a maximum of 3 dB. The value specified for the Power
Hunt parameter (range is 0-3) determines the maximum power increase for
this Remote.
The Power Hunt function is disabled when the Remote switches from ECM
to SCPC mode. Should the Remote revert back to ECM from SCPC mode,
the function is once again enabled.
Multicast Address
This parameter is used to define the IP address for the Multicast of the
Transmission Announcement Protocol (TAP) message that is sent out by the
HCC to all of the associated Remotes in that group. This address must be the
same for all members of the group. The TAP is a proprietary message sent
from the Hub to all Remotes, at regular intervals, specifying the relative start
time and duration for each terminal to transmit.
Set the Multicast Address for this Remote to match that of the associated
HCC (CDD-880).
LO Frequency
Caution: The parameter setting for LO Frequency is very critical for
determining RF frequency translations between Hub and Remote
offsets or data spectral inversions. Take care in setting this correctly.