Quantum and Evolution Series Installation and Operating Handbook
7-16
The
Edit/Tx
menu contains the following options:
•
Service
. This option allows the selection of the framing mode for the modem.
•
Baseband
.
This option leads to a submenu that allows terrestrial framing, timeslots
and overhead to be configured.
•
Clocks
. This allows the transmit path clock source to be selected.
•
Modulation.
This leads to a submenu that allows the modulation scheme to be
configured.
•
FEC.
This leads to a submenu that contains options for selecting the inner and outer
forward error correction (FEC) schemes.
•
Scrambler.
This leads to a submenu that allows scrambling to be controlled.
•
Carrier.
This leads to a submenu that allows the carrier, frequency, power, spectrum
inversion and AUPC (Automatic Power Up-link Control) to be controlled.
•
Interface.
This submenu is used to configure the Quad E1 interface card and
Multimux Tx path.
7.3.3.1.1 Edit-Tx-Service Screen
Options:
Off
The Tx service is switched off.
Closed network
This mode adds no overhead to the data and is compatible
with other closed network equipment. It is provided as part of
the base modem.
Closed network plus ESC
This adds the lowest possible overhead to the satellite data to
provide whatever ESC rate is selected (the variable-rate ESC
channel can provide up to 70% of the main channel rate). It
1:Service 2:Baseband 3:Clocks
4:Modulation 5:FEC 6:Scrambler
7:Carrier 8:Interface
Tx service: [Closed]
1:Off 2:Closed 3:Cl+ESC 4:IBS/SMS
5:IDR 6:OM-73 7:DVBS2