Comtech EF Data CDM-570 - Data and Miscellaneous Interfaces; Data Rate Ranges

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Introduction MN/CDM570L.IOM
1–16
1.4.4 Data and Miscellaneous Interfaces
Primary Data
(3 selectable modes)
RS-422/EI
A
-530 DCE (Rates up to 10 Mbps)
(also supports X.21 DCE & DTE)
V.35 DCE (Rates up to 10 Mbps)
Synchronous EIA-232 (Rates up to 300 kbps)
25-pin D-sub (female)
G.703 (Optional for units
as of 10/2009)
1.544 Mbps T1 (Balanced 100Ω)
2.048 Mbps E1 (unbalanced 75Ω or balanced 120Ω)
15-pin D-sub (female)
or BNC (female)
External Reference In
1, 2, 5, 10 or 20 MHz, -6dBm to +10dBm
(The Ext. ref. locks Tx and Rx synthesizers, and all baseband clock generation)
BNC (female)
Modem Alarms Relay outputs (Tx, Rx & unit faults)
Demodulator I & Q test outputs (constellation)
Demodulator Rx Signal Level output (0 to 10 volts)
External carrier off input
15-pin D-sub (male)
1:1 Control
A
sync serials link to other modem, and switching signals in 1:1 pair, via CRS
-
17
0
A
9
-
pin
D
-
sub (female)
Alarm Relay Type: Form C Contacts. Rating: 125V AC/30V DC, 0.3A AC/1A DC 1
5
-
pin
D
-
sub (male)
Remote Control EI
A
-232 or EI
A
-485 modem control and monitoring
9
-
pin
D
-
sub (male)
Ethernet 10/100 Base Tx for http, SNMP and Telnet interfaces RJ
-
4
5
1.4.5 Data Rate Ranges
FEC Type Modulation Code Rate Data Rate Range EDMAC limited?
None
BPSK Uncoded 4.8 kbps to 3.000 Mbps
Yes – see note below
QPSK/OQPSK Uncoded 9.6 kbps to 5.000 Mbps
Viterbi
BPSK Rate 1/2 2.4 kbps to 1.500 Mbps
QPSK/OQPSK
Rate 1/2 4.8 kbps to 3.000 Mbps
Rate 3/4 7.2 kbps to 4.500 Mbps
Rate 7/8 8.4 kbps to 5.250 Mbps
Viterbi + R-S
BPSK Rate 1/2 2.4 kbps to 1.363 Mbps
QPSK/OQPSK
Rate 1/2 4.3 kbps to 2.727 Mbps
Rate 3/4 6.5 kbps to 4.091 Mbps
Rate 7/8 7.5 kbps to 4.666 Mbps
16-QAM
Rate 3/4 13.0 kbps to 4.000 Mbps
Rate 7/8 16.8 kbps to 4.666 Mbps
TCM + R-S 8-PSK Rate 2/3 8.7 kbps to 4.400 Mbps
Turbo
BPSK
Rate 5/16 2.4 kbps to 0.937 Mbps
Rate 21/44 2.4 kbps to 1.430 Mbps
QPSK/OQPSK
Rate 21/44 4.8 kbps to 2.860 Mbps
Rate 3/4 7.2 kbps to 4.500 Mbps
Rate 7/8 8.4 kbps to 5.250 Mbps
Rate 0.95 9.1 kbps to 5.666 Mbps
8-PSK/8-QAM
Rate 3/4 10.8 kbps to 6.750 Mbps
No
Rate 7/8 13.6 kbps to 7.875 Mbps
Rate 0.95 15.3 kbps to 8.500 Mbps
16-QAM
Rate 3/4 14.4 kbps to 9.000 Mbps
Rate 7/8 16.8 kbps to 9.980 Mbps
Important Note: Where noted in the table above, if EDMAC framing is employed, the upper data rate will
be reduced by 5% for data rates up to 2.048 Mbps, and by 1.6% for data rates above 2.048 Mbps, where
EDMAC2 framing is used, or for Rate 21/44 BPSK/QPSK Turbo, or Rate 5/16 BPSK Turbo.