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CDM-625A Advanced Satellite Modem
Introduction
1.4.6
Framing Summary
Framing Mode
Overhead added
Transparent
None
To 2 Mbps: 5%
EDMAC
Above 2 Mbps: 1.6%
(see Note 2)
EDMAC-2
1.6%
To 2 Mbps: 5%
EDMAC-3
Above 2 Mbps: 1.6%
IDR
Fixed 96 kHz
1/15 of front panel data
IBS
rate
1/15 of front panel data
D&I
rate
Terrestrial is T1 or E1
1/45 of front panel data
rate
D&I++
Terrestrial is
T1 or E1
Variable: between
ESC++
11.76% at 64 kbps to
1.58% above 7 Mbps
0.78% (129/128) of
QDI
front panel data rate
Concatenation of QDI
Framed QDI
and EDMAC-2
Notes:
1.
Reed-Solomon is Off.
% for Rates 5/16 or 21/44 BPSK Turbo, Rate 1/2 QPSK/OQPSK Turbo, and all rates > 2 Mbps.
2.
Available data rates
and format
components
All rates and formats
None
Remote control link
All rates and formats
between modems'
processor plus AUPC
Remote control link
All rates and formats
between modems'
processor plus AUPC
Remote control link
All rates and formats
between modems'
processor plus AUPC
EIA-422 ESC
(8 kbps)
T1, E1, T2 and E2; all
EIA-422 ESC
formats
(64 kbps or
2 audio links)
4 BW alarms
EIA-232 Earth station
64 to 2048 kbps only;
link at 1/480
all formats
primary data rate. One
BW alarm
EIA-232 Earth station
Specific multiples of 64
link at 1/480
kbps only
primary data rate
One BW alarm
Same as EDMAC, plus
Any multiple of 64 kbps,
EIA-232 Earth station
up to n = 31
link at 1/576
primary data rate
EIA-232 Earth station
All rates and formats
link at variable rate,
plus AUPC
n x 64 kbps, up to
n = 128 using a max of
None
4 balanced G.703 E1
D&I interfaces
n x 64 kbps, up to
n = 128 using a max of
None
4 balanced G.703 E1
D&I interfaces
1–23
Overhead
Additional Reed-
Solomon Overhead
200/220
225/205
219/201
126/112
200/180
200/180
200/180
T1 = 225/205
E1 = 219/201 and
IESS-310 mode
T2/E2 = 194/178
126/112
of
th
219/201 for IESS-310
mode
126/112
of
th
219/201 for IESS-310
mode
126/112
of
th
126/112
220/200
225/205
219/201
200/180
Revision 0
MN-CDM625A
Scrambling
(see Note 1)
Basic ITU
V.35 (Intelsat)
Proprietary scrambler
Proprietary scrambler
Proprietary scrambler
Basic ITU V.35
(Intelsat)
IESS-309 scrambler
IESS-309 scrambler
Basic ITU V.35
(Intelsat)
Basic ITU V.35
(Intelsat)
Basic ITU V.35
(Intelsat)
Basic ITU V.35
(Intelsat)
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