Automatic Uplink Power Control; Framing Summary - Comtech EF Data CDM-600 Installation And Operation Manual

CDM-600 Satellite Modem
Remote Control
Modem Alarms
IDR BWA Outputs
Remote Control
ADPCM Audio Interface
Auxiliary Serial
15.4

Automatic Uplink Power Control

Operating Mode
Target Eb/No range
Max AUPC range
Monitor functions
15.5

Framing Summary

Transparent
Overhead None
added
Available All rates and
data rates formats
and format
Overhead None
components
Additional 200/180
Reed- 219/201 for
Solomon IESS-310
Overhead mode
Scrambling Basic ITU
(see V.35
Note 1 ) (Intelsat)
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
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
4 backward alarm Form C relay outputs
RS-232 or RS-485 modem control and monitoring
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
RS-232 link to other modem in 1:1 pair, via CRS-150
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)
0 to 9.9 dB at remote demod (default is 4.0 dB)
0 to 9 dB (default is 3 dB)
Remote demod Eb/No
Tx power level increase
(front panel or via remote control interface)
EDMAC IDR
To 2 Mbps: Fixed 96 kHz
1.5%
Above 2 Mbps:
1.5%
(see Note 2)
All rates and T1, E1, T2 and
formats E2; all formats
Remote control EIA-422 ESC
link between (8 kbps)
modems' EIA-422 ESC
processor (64 kbps or 2
plus AUPC audio links)
4 BW alarms
200/180 T1 = 225/205
E1 = 219/201 and
IESS-310 mode
T2/E2 = 94/178
Proprietary Basic ITU V.35
scrambler (Intelsat)
IBS
1/15 of front 1/15 of front
panel data rate panel data rate
Terrestrial is T1
or E1
64 to 2048 Specific
kbps only; all multiples of 64
formats kbps only
EIA-232 Earth EIA-232 Earth
station link at station link at
th
1/480 of 1/480
primary data primary data
rate rate
One BW alarm One BW alarm
126/112 126/112
219/201 for 219/201 for
IESS-310 mode IESS-310 mode
IESS-309 IESS-309
scrambler scrambler
15–7
Revision 7
MN/CDM600.IOM
15-pin D-sub (male)
15-pin D-sub (female)
9-pin D-sub (male)
9-pin D-sub (female)
USB Type B Socket
D&I D&I++
1/45 of front
panel data
rate
Terrestrial is
T1 or E1
Any multiple
of 64 kbps, up
to n = 24.
Same as
EDMAC, plus
th
of EIA-232 Earth
station link at
th
1/576 of
primary data
rate
126/112
Basic ITU
V.35 (Intelsat)
ESC++
Variable:
between
11.76% at
64 kbps
to 1.58%
above
7 Mbps
All rates
and formats
EIA-232
Earth
station link
at variable
rate, plus
AUPC
126/112
Proprietary
scrambler