Comtech EF Data CIM-550, Installation And Operation Manual

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CiM-550 IP Enabled Satellite Modem Rev. 2
Front Panel Menus CD/CIM550.IOM
32
ACTION WHEN REMOTE DEMOD
UNLOCKS: NOM-PWR MAX-PWR
DEMOD UNLOCK screen
Select the action that will
occur if the remote demod
is unlocked.
NOM-PWR
MAX-PWR
SELECT\CONFIG\TX\SCRAM
DISPLAY SELECTIONS/DESCRIPTION
SELECT TX SCRAMBLING
OFF ON (PRESS ENTER)
When Transparent mode is selected, a
V.35 scrambler is used. In Framed or
Reed-Solomon modes, a frame
synchronized scrambler is used.
SELECT\CONFIG\TX\CLK
DISPLAY SELECTIONS/DESCRIPTION
SELECT TX CLOCKING MODE:
INT EXT LOOP-TIMED (ENT)
INT
EXT
LOOP-TIMED
INTERNAL - indicates that the CiM-550 will supply a clock to the DTE, which
is derived from its internal high-stability source.
EXTERNAL - indicates that the CiM-550 expects to receive a clock from the
DTE, to which the unit can phase-lock its internal circuits.
LOOP-TIMED - indicates that the transmit timing source should be the receive
clock, from the direction of the satellite. This is a useful mode, in that no external
connection needs to be made in this mode. If the demodulator loses lock, or if
there is no receive signal present, the internal clock is substituted. Note also that
this mode will work even with asymmetric RX and TX data rates.