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GE Orion COS

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timkilbride

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I'm curious as to how the COS is suppose to function on the Orion's, specifically a VHF in conventional operation.

Under the External I/O tab in Programmer I have External Mute checked, External Mute Output is 1, and Active High.

While measuring the voltage on Pin 22 of the rear DB37, I get .3v on a receiving signal. While sitting idle it will generally sit at 0.0, sometimes bouncing to .1 briefly.

I'm thinking maybe I have something wrong in the setup???

Tim
 

DisasterGuy

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I normally use active low but can't remember the actual voltage output. I have seen the Orion and M7100 have an odd ext mute issue where it will stick low when using active low immediately following power up and this is solved by hitting the clear button on the control head.


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Doink

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Jan 12, 2011
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External outputs do not source a voltage but sink current. This is typical of most manufacturers. The external output is an open collector output which means when it is an active high a transistor presents a high impedance to ground and, conversely, an active low will present a low impedance to ground. The outputs are not capable of sinking large currents like a bosch relay but are usually on the order of 200 mA or so. Check the manual for exact specs.
 
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