APPENDIX A
SPECIFICATIONS
Transmission Line: Dual optical cable
Transmission Mode: Asynchronous, half or full duplex, point-to-point
Interfaces: EIA RS-232, CCITT V.24
Data Rates: 0 - 57.6 Kbps
Distance: 2 miles over continuous fiber
RTS/CTS Delay: Switch-selectable: No delay, 7.0 mS, 53 mS
Receiver Sensitivity: -45 dBm
Coupled Power Output: -30 to -36 dBm
Optic Wavelength: 850 nm
LED Indicators: Power, TD, RD, RTS, CD, Test Mode, Error
Connectors: HD-26 female on RS-232 side; ST or SMA connectors
on fiber side
Power Supply: 120/240V (switchable) on rack chassis
Temperature Range: 0-60°C (32-140°F)
Altitude: 0-15,000 feet
Humidity: Up to 95% non-condensing
Weight: 2 oz.
Dimensions: 0.95”W x 3.1”H x 5.4”L
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1.
Locate the lower of the two toggle switches on the front panel
of the Model 1140RC and move it to the right. This will
activate the V.52 BER test mode and transmit a “511” test
pattern to the other unit. If any errors are present, the
receiving modem’s red “Error” LED will blink sporadically.
Note: For this independent test to function, the “511” switch on
both Model 1140RCs must be turned on.
2.
If the test indicates no errors are present, move the V.52
toggle switch to the left, thus activating the “511/E” test with
periodic errors present. If the test is working properly, the
receiving modem’s red “Error” LED will blink
regularly. A
successful “511/E” test will confirm that the link is in place, and
that the Model 1140RC’s built-in “511” generator and detector
are working properly.
