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2720 Subcarrier FSK Data System

  
The 2720 is an FSK subcarrier above video data transmission system with factory set frequencies from 4.5 MHz to9.0 MHz. Data is synch or asynch (factory set) and the interface format can be set to RS-422 or RS-423 (RS-232 compatible) by changing on board jumpers. Connection to video is via a high impedance resistor which does not load the video signal even if power is lost.
 

 2720-XXTR FSK Data Transmission System


 2720-XXR FSK Data Receiver Single

Equipment Specifications*
 

General
Modulation
Frequency Range
Data Rates
Spacing		 FSK
4.5 to 9.0 MHz, agile on Tx, crystal controlled on Rx
2.4, 4.8, 9.6, 14.4, 19.2 kB/s sync or async
45kHz max
Modulator (Transmitter)
Subcarrier Output
Level		 1k ohm or 75 ohms, unbalanced
25 to 150 mVpp, 1k ohm; 50 to 300 mVpp, 75 ohms
Demodulator (Receiver)
Input
Impedance
Level
Interface
Scrambling
Forward Error Correction		 Hi-Z bridging, unbalanced
>= 2k ohms
25 to 250 mVpp
RS423 (RS232 compatible) or RS422
CCITT V.35
None
Controls (Transmitter)
Level
Frequency
Mute		 Potentiometer adjusts output carrier level
BCD switches, adjustable w/ small blade screwdriver
Toggle switch mutes output carrier
Indicators
Data
Mute
Alarm		 Green LED
Red LED
Red LED
Other
SC Connectors
Data Connectors
Mechanical
Power		 BNC, female
Barrier strip
19 inch standard chassis, 1.75"H X 14"D
115 VAC, 60Hz, 20W max, wall mount power supply

*+10 to +40 degrees C; Specifications subject to change without notice