Comtech EF Data CDM-600/600L - Manual (Page 55)

CDM-600/600L Open Network Satellite Modem Revision 3
Introduction MN/CDM600L.IOM
1–27
1.5.6 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
RS-422 ESC
(8 kbps)
RS-422 ESC
(64 kbps or 2
audio links)
4 BW alarms
RS-232 Earth
station link at 1/480
th
of primary data rate
One BW alarm
RS-232 Earth
station link at 1/480
th
of primary data rate
One BW alarm
Same as EDMAC,
plus RS-232 Earth
station link at
1/576
th of primary
data rate
RS-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
Important Notes :
1. If EDMAC framing is employed, the upper data rate will be reduced by 5% for data rates up to 2.048 Mbps, and by 1.58% for
data rates above 2.048 Mbps).
2. If ESC++ framing is employed, the upper data rate will be reduced 1.58%.
1.5.7 Miscellaneous
Front panel
Tactile keypad, 6 keys (Up/Down, Left/Right, Enter/Clear)
Vacuum Fluorescent Display (blue) - 2 lines of 40 characters
Loopbacks Internal IF loopback, RF loopback, digital loopback, and inward/outward loopback
Fault relays
Hardware fault, RX and TX Traffic Alarms, Open Network Backward Alarms
Type: Form C Contacts.
Rating: Less than
± 15 volts up to 1 Amp
M&C Interface RS-232 and RS-485 (addressable multidrop, 2-wire or 4-wire)
M&C Software SatMac or CMCS software for control of local and distant units
Dimensions
CDM-600L: 1RU high, 18 inches (457mm) deep
CDM-600: 1RU high, 13.1 inches (333mm) deep
Weight 10 lbs (4.5 kgs) max
AC consumption
CDM-600L: 220V 50 Hz without BUC power supply – Power factor = 0.46, 130 VA, 60 Watts
120V 60 Hz without BUC power supply – Power factor = 0.64, 85 VA, 55 Watts
290 watts (maximum) with BUC power supply
CDM-600: 25 watts (typical)
55 watts (maximum)
Operating voltage
100 - 240 volts AC, +6%/-10% - autosensing
(total absolute max. range is 90 - 254 volts AC)
Optional 38-60 volts DC
Operating temperature 0 to 50 o C (32 to 122 o F)