CDM-425 Advanced Satellite Modem
Revision 0
Front Panel Operation
6–29
MN-CDM-425
6.2.1.4.6
CONFIG: Rx
Symb (IP-ACM or V2-ACM Modes Only)
Appendix K. V
ERSA
FEC
®
/ V
ERSA
FEC-2 ACM ADAPTIVE CODING
AND
MODULATION (ACM) OPTION
VersaFEC ACM or VersaFEC-2 ACM modes require the appropriate FAST codes
for the maximum operating symbol rate.
RxSymbolRate = 01000.000 ksps (ACM Mode)
Data Invert=Off Clock Invert=Off (
)
When either ACM mode is active, the
CONFIG: Rx
menu changes the
Data
option to
Symb
.
On the top line –
Edit the
Rx Symbol Rate
by using the
◄ ►
arrow keys to select a digit, and
then using
the ▲▼ arrow keys to change that digit. Press
ENTER
. Note that asymmetric
operation is supported – transmit and receive symbol rates do not have to be equal.
On the bottom line
–
S
et the
Data Invert
or
Clock Invert
operation by using the
▲▼ arrow
keys to select
On
or
Off
. Press
ENTER
.
6.2.1.4.7
CONFIG: Rx
Descram (Descrambler)
Rx Descrambler = IESS (Normal,IESS,Off)
IESS-315 V.35 Scrambler
(
)
Use the
▲▼ arrow keys to select
Normal
,
IESS
, or
Off
. Press
ENTER
.
The modem automatically selects the actual scrambler used for
Normal
, depending on the exact
operating mode:
•
When framing = EDMAC/2/3 and Reed-Solomon is
OFF
, its frame synchronous
scrambler is used.
•
ITU V.35 scrambler (Intelsat variant) is the default scrambler when all of the above
settings are
OFF
.
When you select
IESS
, the default ITU V.35 scrambler specified in IESS-315 takes priority over
all “normal” scramblers and is used instead. Therefore, for many operating modes, the two
scrambler selections are redundant.
Содержание CDM-425
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Страница 118: ...CDM 425 Advanced Satellite Modem Revision 0 FAST Activation Procedure 5 6 MN CDM 425 Notes...
Страница 194: ...CDM 425 Advanced Satellite Modem Revision 0 Front Panel Operation 6 76 MN CDM 425 Figure 6 3 Loopback Modes...
Страница 390: ...CDM 425 Advanced Satellite Modem Revision 0 Serial Remote Control 8 66 MN CDM 425 BLANK PAGE...
Страница 558: ...CDM 425 Advanced Satellite Modem Revision 0 ODU Transceiver BUC LNB Operation 10 68 MN CDM 425 Notes...
Страница 574: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix B B 12 MN CDM 425 BLANK PAGE...
Страница 575: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix B B 13 MN CDM 425 Figure B 8 VersaFEC 2 Short Block...
Страница 576: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix B B 14 MN CDM 425 Figure B 9 VersaFEC 2 Short Block...
Страница 587: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix E E 3 MN CDM 425 Figure E 1 TX Clock Modes...
Страница 589: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix E E 5 MN CDM 425 Figure E 2 RX Clock Modes...
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Страница 607: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix F F 5 MN CDM 425 Figure F 2 Conventional FDMA Link...
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Страница 685: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix K K 5 MN CDM 425 Figure K 1 ACM over Satellite Generic Example...
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