Comtech EF Data SMS-301 Quick Start Manual page 2

SMS-301 Modem Protection Switch
SPECIFICATIONS
System
Data Interface
Data Rate
IF Interface impedance
IF Frequency
Operation Modes
Power
Size
Weight
Controls
Switch
Modulator
Demodulator
Indicators
Power Supplies
Mode
Modulator
Demodulator
Faults
M&C
Remote Monitor and Control
Monitor and Control
Serial Interface
Baud Rate
Parameters Controlled
SMS-301 BLOCK DIAGRAM
MODEM A
1 : 1 SWITCH
J13 MODEM REMOTE
EIA-485
STATUS/FAULTS
J14
Optimizing Satellite Communications
EIA-232, V.35, EIA-422, G.703, and MIL-STD-188-114
20 Mbps max.
75Ω BNC (50 Ω optional)
50 to 180 MHz
Auto/manual, local/remote
90 to 264 VAC, 47 to 63 Hz, 30W max.
19 inch W x 15.2 inch D x 1.75 inch H (1RU) (48.2 x 38.6 x 4.4 cm)
9 lbs. (4.0 kg) max.
Remote/local
A/B online select or auto
A/B online select or auto
1, 2 on
Automatic or manual
A/B online
A/B online
Transmit, receive, system, and stored
9-pin D sub connector, EIA-232 or EIA-485 (2- or 4-wire), front panel selectable
EIA-232 or EIA-485, programmable
150 to 19200 bit/s, programmable
Start/stop, parity, data bits
TRANSMIT IF
RECEIVE IF
BASEBAND DATA
TX/RX
SWITCH M&C
LOGIC
REMOTE
CONTROL
TRANSMIT IF
MODEM B
RECEIVE IF
BASEBAND DATA
TX/RX
J2 J5 J9
J1
J8
SPLITTER
J4
J10
J3
J6
J7
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BASEBAND DATA I/O
TO/FROM CUSTOMER
RECEIVE IF
50 TO 180 MHZ
FROM
DOWN CONVERTER
TRANSMIT IF
50 TO 180 MHZ
TO UP CONVERTER
EIA-232 OR EIA-485
HOST TERMINAL
OR COMPUTER