Comtech EF Data CDM-570AL - CONFIG: Tx) Scr (Scrambling)

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Revision 5
Front Panel Operation 6–25 MN-CDM570A
To set the action that occurs if the remote demod is unlocked, use the ◄ ► arrow keys to
select Nom, Max, or Hold. Press ENTER.
Parameter
Description
Nom
(Nominal Power) The output level reverts to the nominal power level set under
Manual.
Max
(Maximum Power) The output level changes to the maximum permitted.
Hold
Only available in ACM mode. Power level remains the same when unlock occurs.
(CONFIG: Tx) Output Power Level Mode: CnC-APC
See Section G.6.7 CnC-APC Setup in Appendix G. DOUBLE TALK CARRIER-IN-
C
ARRIER OPTION.
6.3.2.3.9 (CONFIG: Tx) Scr (Scrambling)
IMPORTANT NOTE – All selections are always viewable. If a Hardware or FAST
option is either uninstalled or invalid, the cursor will skip past the unavailable
choice.
Tx Scrambling:Default-On
IESS-315-On Off (◄ ►,ENT)
Use the
◄ ► arrow keys to select a parameter. Press ENTER.
Parameter
Description
Default-On
The appropriate scrambler type is automatically selected.
The default scrambler types are:
• Uncoded – ITU V.35 (Intelsat variant)
• Viterbi, no framing – ITU V.35 (Intelsat variant)
• Viterbi, EDMAC frame – Comtech proprietary, frame synchronized
• Viterbi +RS or TCM/RS – Per IESS-308, frame synchronized
• TPC – Comtech proprietary, frame synchronized
• 8-QAM TPC – ITU V.35 (Intelsat variant)
• VF or ULL – ITU V.35 (Intelsat variant)
• VF2S or VF2L – ITU V.35 (Intelsat variant)
Off
No scrambling
NOTE: In legacy CDM-570 Compatible mode, IESS-315 is not available for all FEC types.
However, in CDM-570A mode, IESS-315 is a permitted choice for all FEC types. When
IESS-315 is selected, the ITU V.35 scrambler specified in IESS-315 takes priority over all
“Default-On” scramblers and is used instead. Therefore, for many operating modes, the
two scrambler selections are redundant.
When using Carrier-in-Carrier, the IESS-315 (V.35) scrambler is the only permitted
choice.