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Mdc-1200 Tx mute

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Will001

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Hello everyone:
I was wondering if anyone knew how to produce a muted mdc-1200 chirp when transmitting on a Xts5000? I don't like transmitting the entire data packet, I only want to transmit the quick chirp (like what the NYPD has). Thanks in advance!
 

jruta

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Doesn't work like that. The receiving radio mutes the mdc burst to produce the chirp you hear (As explained in above post) what you COULD do is set your radios transmit signaling type to "singletone" and play with a random signal tone (and set the time for very short .5-1.0 seconds, maybe?). But YOU will not hear this while transmitting. Not sure what the point would be...
 

jruta

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lol well it's a learning curve and we all start somewhere haha.
 

jruta

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Oh wait! Just thought of something- I THINK you can set your MDC side tone (the one you hear on your radio while transmitting MDC to "SHORT". That will give you a single "beep" through your radios speaker when you push-to-talk. I'm not sure XTS5000 can do it, but older radios can, so it wouldn't surprise me.
 

jruta

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the NYPD mutes MDC at the voting comparator.

Hi, please elaborate?

Meaning audible MDC is striped at the repeater level? (And never passed as audio) If not, is it not striped via DOS at the subscriber level?

Thanks
 

gatekeep

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Hi, please elaborate?

Meaning audible MDC is striped at the repeater level? (And never passed as audio) If not, is it not striped via DOS at the subscriber level?

Thanks

Yes. MDC is stripped at the infrastructure level in NYPD's implementation. AFAIK; DOS is disabled on the NYPD subscriber units.
 

ff026

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DOS is enabled on the subscriber units. Its definitely enabled on the TAC channels. The reason DOS is done at the comparator is to track a units unauthorized transmission.

For example: when there are unauthorized transmissions a supervisor in the field will ask central for a time check. Central will announce the time. Later if the supervisor wishes to forward a complaint against an MOS for an unauthorized transmission he will notify the precinct's Integrity Control Officer (ICO). The ICO will forward the details to the communications section. The communications section will pull the recording and decode the ID's at the radio shop. The communications section will then forward the information back to the ICO with the recordings and ID's of the radio's and time of transmission's. The ICO has the master list of who is assigned which radio in the command. A formal complaint will then be drafted in the form of a command discipline (CD) against who ever made the unauthorized transmissions and discipline will be handed down.
 
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