Help, carrier rise time on CDM

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Vercomm
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Help, carrier rise time on CDM

Post by Vercomm »

Hi Guys,

Just wondering if anybody knows what the carrier rise time is on a VHF CDM750 & CDM1250. I imagine their the same. Basically I will be injecting AFSK into pin 5 and what to know how long the PTT needs to be keyed before I actually send the audio.

Thanks,

Jamie
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wavetar
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Post by wavetar »

Well, the minimum programmable time for pre-PTT MDC signalling is 25ms, so I'd say that would be a safe bet to try.

Todd
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Vercomm
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Post by Vercomm »

Thanks Todd,

The GPS guy is telling me that they usually use 100ms. So i'll try that and see what happens.

Thanks,

Jamie
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wavetar
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Post by wavetar »

You shouldn't have any issues with that.

Todd
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