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CDM-600 Satellite Modem Revision 7
Remote Control MN/CDM600.IOM
15–7
Modem Alarms Relay outputs (Tx, Rx & unit faults)
Demodulator I & Q test outputs (constellation)
Demodulator Rx Signal Level output (0 to 2.5 volts)
External carrier off input
15-pin D-sub (male)
IDR BWA Outputs 4 backward alarm Form C relay outputs
15-pin D-sub (female)
Remote Control RS-232 or RS-485 modem control and monitoring 9-pin D-sub (male)
ADPCM Audio Interface 2 audio channels, each occupying 32 kbps bandwidth as part of IDR
overhead or as a 64 kbps primary data rate option.
600 Ω balanced – 0 dBm0 nominal, -6 to +8 dB, 2 dB steps
9-pin D-sub (female)
Auxiliary Serial RS-232 link to other modem in 1:1 pair, via CRS-150 USB Type B Socket
15.4 Automatic Uplink Power Control
Operating Mode Requires Closed Network Framed mode (EDMAC, D&I++, or ESC++) for transport of Eb/No information
from remote modem (EDMAC can be enabled or disabled)
Target Eb/No range 0 to 9.9 dB at remote demod (default is 4.0 dB)
Max AUPC range 0 to 9 dB (default is 3 dB)
Monitor functions Remote demod Eb/No
Tx power level increase
(front panel or via remote control interface)
15.5 Framing Summary
Transparent EDMAC IDR IBS D&I D&I++ ESC++
Overhead
added
None To 2 Mbps:
1.5%
Above 2 Mbps:
1.5%
(see Note 2)
Fixed 96 kHz 1/15 of front
panel data rate
1/15 of front
panel data rate
Terrestrial is T1
or E1
1/45 of front
panel data
rate
Terrestrial is
T1 or E1
Variable:
between
11.76% at
64 kbps
to 1.58%
above
7 Mbps
Available
data rates
and format
All rates and
formats
All rates and
formats
T1, E1, T2 and
E2; all formats
64 to 2048
kbps only; all
formats
Specific
multiples of 64
kbps only
Any multiple
of 64 kbps, up
to n = 24.
All rates
and formats
Overhead
components
None Remote control
link between
modems’
processor
plus AUPC
EIA-422 ESC
(8 kbps)
EIA-422 ESC
(64 kbps or 2
audio links)
4 BW alarms
EIA-232 Earth
station link at
1/480
th
of
primary data
rate
One BW alarm
EIA-232 Earth
station link at
1/480
th
of
primary data
rate
One BW alarm
Same as
EDMAC, plus
EIA-232 Earth
station link at
1/576
th
of
primary data
rate
EIA-232
Earth
station link
at variable
rate, plus
AUPC
Additional
Reed-
Solomon
Overhead
200/180
219/201 for
IESS-310
mode
200/180 T1 = 225/205
E1 = 219/201 and
IESS-310 mode
T2/E2 = 94/178
126/112
219/201 for
IESS-310 mode
126/112
219/201 for
IESS-310 mode
126/112 126/112
Scrambling
(see
Note 1 )
Basic ITU
V.35
(Intelsat)
Proprietary
scrambler
Basic ITU V.35
(Intelsat)
IESS-309
scrambler
IESS-309
scrambler
Basic ITU
V.35 (Intelsat)
Proprietary
scrambler
Notes:
1. Reed-Solomon is Off.
2. 1.5 % for Rates 5/16 or 21/44 BPSK Turbo, Rate 1/2 QPSK/OQPSK Turbo, and all rates > 2 Mbps