I've obtained a used sensormatic 9 channel multiplexer I'd like to use for a loaner w/ a vcr however when I plug in my 12V 1500ma power plug all I get is an alarm sound from the unit and no lights on the front pannel, does anyone have any experience with this unit? I'm thinking it was in alarm when it was powered down years ago and I'm wondering if anyone knows of a default key sequence to unlock it or if I have a DOA on my hands.

Thanks

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Have you hooked it up to a monitor?

The RV2209 was replaced with the Robot MV99p and that manual can be found on line.

http://americandynamics.net/products/multiplexer_quad_MVP_duplex.aspx

I have a couple of 16 channel sensormatic multiplexers that will make that sound when they are first powered up. I belive everyone I have hooked up over the years does the same.