Overview
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.
Details
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