T
Chapter 5
Specifications
his chapter lists the specifications for the modem.
General
Operation:
2-wire half-duplex or 4-wire full-duplex private line operation.
Data rate:
0-1200 bps asynchronous on worst case line. 0-1800 asynchronous on C2
conditioned line
Modulation:
Phase coherent. Frequency Shift Keyed (FSK)
Carrier frequencies:
Mark 1200 Hz
±
1%
Space 2200 Hz
±
1%
Line impedance:
600 ohms
±
10% transformer coupled and transient protected.
Transmitter output level:
Selectable from 0 to –14 dBm, in 2 dB steps.
RTS-CTS delay:
8, 33, 59, or 219 ms
Carrier Detect delay:
6 or 23 ms OFF-to-ON, 6 On-to-OFF
Digital interface:
EIA RS-232-C and CCITT V.24.
Package:
Standalone, UL approved.
Turnaround squelch:
8 ms or 159 ms
Anti-streaming:
Option to turn transmitter OFF after selected time, even if RTS is ON
Test features:
Self Test, Analog Loopback, Digital Loopback, and Test Pattern Transmit
Dimensions and Weight
Width:
7.00 inches (17.8 cm)
Length:
9.60 inches (24.4 cm)
Height:
2.25 inches (5.7 cm)
Temperature Range
Operating:
-40 to +85 degrees Celsius (MD1970A and MD1970C)
0
o
to 50
o
Celsius (MD1970A-DC)
Storage:
-40 to +85 degrees Celsius
Humidity range:
95% relative, non-condensing
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Содержание MD1970A
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Страница 7: ...Installing the Modem Figure 2 5 Modem Jumper Locations Page 7...
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