Comtech EF Data CDM-600/600L - Manual (Page 53)

CDM-600/600L Open Network Satellite Modem Revision 3
Introduction MN/CDM600L.IOM
1–25
1.5.3 Data Interfaces
Primary Data
(3 selectable modes) RS-422/RS-530 DCE (Rates up to 10 Mbps)
(also supports X.21 DCE & DTE and 8k ESC orderwire for IDR)
V.35 DCE (Rates up to 10 Mbps)
Synchronous RS-232 (Rates up to 300 kbps)
LVDS serial (Rates up to 20 Mbps)
HSSI - Requires optional CIC-20 Converter (Rates up to 20 Mbps) 25-pin D-sub (female)
G.703 (Tx In, Drop
Out, Insert In, Rx Out) 1.544 Mbps T1 (Balanced 100 Ω)
6.312 Mbps T2 (unbalanced 75 Ω or balanced 110 Ω)
2.048 Mbps E1 (unbalanced 75 Ω or balanced 120 Ω)
8.448 Mbps E2 (unbalanced 75 Ω)
Note : All Drop and Insert modes are a FAST option.
15-pin D-sub (female)
or BNC (female)
External Reference In 2.4 kHz – 10 MHz, in 1 Hz steps (locks baseband clocks only)
TTL level (unbalanced) or sine wave @ 0dBm nominal BNC (female)
Overhead Data RS-422 octet clocks for IDR ESC & IBS
RS-422 IDR 64 kbps ESC data & clock
RS-232 IBS ESC data & clock
RS-422 External Clock input
IDR BWA Inputs
RS-232 High Rate ESC data ( with IBS FAST)
RS-232 ESC++ data ( with Firmware Ver. 1.3.0 or higher) 25-pin D-sub (male)
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
Carrier Level (vs) Symbol Rate
-100.0
-90.0
-80.0
-70.0
-60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
1 10 100 1,000 10,000 100,000
Symbol Rate (ksps)
C
a
rr
ie
r L
e
v
e
l (
d
B
m
)
Minimum
Maximum
Sig Level.xls
CDM-600/600L Demodulator