TM 11-7440-232-12/NAVELEX 0967-LP-275-5010
Output Impedance, Load Impedance,
and Rise/Fall Time .........................................................
Same as data output.
Power Supply Alarm.......................................................
Provides normally open and normally closed
outputs from alarm relay.
TRANSMISSION LINE REQUIREMENTS
Frequency Response .....................................................
Without Equalization: +1 db from 900 to 2500
Hz. With Adjustable Equalizer: -2 to +6 db
from 900 to 2700 Hz.
Envelope Delay..............................................................
Without Equalization: Within 300
microseconds from 900 to 2500 Hz. ...............................
With Adjustable Equalizer: Within 1800
microseconds from 700 to 2700 Hz.
Line Impedance .............................................................
300, 600, or 900 ohms balanced.
Signal/Noise Ratio..........................................................
10.5 db at 1200 Hz. 13 db at 2400 Hz.
Interface System Compatibility.......................................
Conforms to E1A Standard RS-232-2-B
recommendations and meets low level
interface requirements of MIL-STD 188B.
Transmission Facilities ...................................................
Low-speed system arrangement operates over
FCC Tariff 237 Schedule 4A telephone
networks, or any standard 3-KHz voice channel
derived on open-wire, cable, carrier, or
microwave facilities.
Power Requirements ......................................................
100 to 134 volts ac, 47 to 63 cps, 17 watts.
ENVIRONMENTAL CONDITIONS
Ambient Temperature ....................................................
0to +50 (+32to +122F)
C
Relative Humidity...........................................................
95%
Altitude...........................................................................
10,000 feet
DIMENSIONS
Height ............................................................................
3-1/2 inches (2 mounting spaces)
Width .............................................................................
17 inches nominal, 19-1/2 inches with mounting flanges.
Depth .............................................................................
10 inches.
Weight ...........................................................................
MD-701/UY-19 lbs. fully equipped.
MD-701A/UY-19 lbs. ......................................................
fully equipped.
MD-701B/UY-50 lbs. ......................................................
fully equipped.
Installation......................................................................
Digital data modem mounts on a standard 19-
inch equipment rack. All external connections
are made at the rear.
1-19
