Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 285)

Chapter 4 - Configuring Network Modems 4-67
MN/22156, rev 12 Devices
Valid characters: Space ( ) * + - , . / 0 thru 9 and Aa thru Zz .
For the CDD-880 that is serving as the HCC, identify the circuit for
Demod 1 as ECM TAP .
Figure 4-42 VersaFEC Demodulator dialog, CDD-880
Additional parameters for the Hub demods are described below.
Spectrum Invert
Select Spectrum Invert if required for this demod. Default is disabled.
This setting allows for adjustment of the orientation of the signal bandwidth
with respect to the carrier frequency. Typically, the spectrum inversion
setting of the demod will match that of the LNB.
Scrambler
The receive Scrambler (descrambler) can be set for the Hub demod if
required. Default is disabled.
Note: Enabling this parameter for the Hub receive requires that it also be
enabled for the Remote transmitter (CDM-840) to perform scrambling
(see “Devices | Mod” on page 4-58).
NOTE