Config) Tx: Pilot - Comtech EF Data CDM-750 Installation And Operation Manual

CDM-750 Advanced High-Speed Trunking Modem
Front Panel Operation

5.2.2.1.2.7 (CONFIG) Tx: Pilot

Tx: Pilot=Off
Goldcode=000000
Use the ◄ ► arrow keys to select Pilot, Pilot Location, or Goldcode, and then press ENTER.
(CONFIG) Tx: Pilot
Use the ▲ ▼ arrow keys to select Pilot as On or Off. Note the following:
•
Select Off to disable insertion of pilot symbols into the physical layer frame.
•
Select On to enable insertion of pilot symbols into the physical layer frame.
Press ENTER when done.
(CONFIG) Tx: Pilot
Use the ▲ ▼ arrow keys to select Pilot Location as Average or Peak, and then press ENTER.
Note the following:
•
The CDM-750 automatically adjusts, but the default value is Average.
•
Select Average to set the pilots and header to the average power band of the transmitted
constellation (QPSK, 8PSK, 16APSK or 32APSK) per DVB-S2 (required for ACM – see
Sect. 5.2.2.1.5).
•
Select Peak to set the pilots and header to the outer ring of the transmitted constellation
(QPSK, 8PSK, 16APSK or 32ASK).
IMPORTANT
(CONFIG) Tx: Pilot
The Gold-n Index indicates the Physical Layer spreading sequence number. First, use the
arrow keys to select a digit to edit, and then use the
Note the following:
•
The index can be set from 000000 to 262,141.
•
The default setting is all 0s.
Press ENTER when done.
Pilot Location=Peak
Pilot
Pilot Location
Not all commercially available demodulators will function well with the
Peak pilot level.
Goldcode
arrow keys to edit the value of that digit.
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Revision 1
MN-CDM750
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