Comtech EF Data DD240XR Rev Е - Manual (Page 25)

DD240XR High-Speed Digital Demodulator User Interfaces
MN-DD240XR – Rev. E 4-5
Note: If at any time the user wishes to abort the changes being made, depress <CLEAR>
to begin again.
Figure 4-3. Entering New Parameters
4.2 Front Panel Control Screen Menus
The DD240XR Front Panel Control Screens are broken down into sections under several Main
Menus.
4.2.1 Main Menus
Demodulator
Interface
Monitor
Alarms
System
Test
4.2.2 Demodulator Menu Options and Parameters
NETWORK SPEC:
{DVBS, DVB-S2-BS-NBC}
FREQUENCY (MHz):
{NNNN.NNNNNN}
Carrier Frequency – Enter in 1 Hz increments where
NNNN.NNNNNN is the frequency in MHz.
Select a carrier with 1 Hz steps.
MODULATION:
DVB-S: {8PSK, 16QAM},
DVB-S2 {QPSK, 8PSK, 16APSK}
Displays the Modulation Type
INNER FEC RATE:
DVB-S QPSK: 1/2, 2/3, 3/4, 5/6, 7/8
DVB-S 8PSK: 2/3, 5/6, 8/9
DVB-S 16QAM: 3/4, 7/8
DVB-S2 QPSK: 1/2, 2/3, 3/5, 3/4, 4/5, 5/6, 8/9, 9/10
DVB-S2 8PSK: 2/3, 3/5, 3/4, 5/6, 8/9, 9/10
DVB-S2 16APSK: 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
Note: 9/10 only available with normal FEC frames