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CM200 com in/out to GoPro

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tedean

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Dec 23, 2014
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We are trying to wire up transmitting and receiving audio out from a CM200 to a GoPro audio input. the go pro has a simple mic input.

I have theCM200 connector pin definitions 1 - 16 and the connector (HLN9242A) to get the wiring out. This is for racing and we wish to record the cockpit noise as well as the driver com.

I admit I am more knowledgeable with data asquission than radios. I would really appreciate any help this group might be willing share.

Our team
Racher Rennstall
 

tedean

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Dec 23, 2014
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Thru a few searches I have succeeded in capturing audio recording to the GoPro for incoming transmissions only. This was using P1 and P16 outputs thru 330ohm resistor and 1uf capacitor, each in series, then on thru mono jack to usb to the GoPro.

I cannot figure out how to get P2 External Mic Audio to record using similar resistors and capacitors. P2 states Input impedance:500ohms, 80mV rms at 1kHz for 60% deviation.

Would anyone help me with this final step?
 

mmckenna

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Pin 2 is used for connecting an external microphone, it won't give you front panel microphone audio.

Pin 11 and 1 will give you a flat received audio output at 330mv, and won't require bypassing the speaker output. This is a common way to take received audio out to feed other sources.

I don't know if there is an easy way to get the microphone audio off the radio without going inside and tapping it there.
 

SteveC0625

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