[Avid-L2] Sony Monitor Auto Termination?

Just curious what the actual mechanism is for Sony monitors with composite input loop thru that auto terminates.  I know if nothing is connected to the loop thru output the input will be terminated to 75 ohms.  Once you connect a cable to the loop thru output the termination is lifted.  Is the lift of the termination a active circuit or a physical feature of the loop thru output chassis mount bnc connector.  I haven't pulled one apart in a long time so I don't remember how this might work.  Having just discovered why a machine room composite monitor was washed out do to an unterminated loop thru cable that appears at the video patch bay but is not normalized to 75 ohms.  Of course the AEs fix has been to crank down the brightness and contrast on the monitor and not report that there is a problem.  Where's the baseball bat when you need it?

John Moore

Barking Trout Productions

Studio City, CA

bigfish@pacbell.net

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