Batboard

Posted: **Sun Apr 01, 2007 8:51 am**

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

Posted: **Sun Apr 01, 2007 4:30 pm**

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

Posted: **Sun Apr 01, 2007 10:43 pm**

Thanks Todd,

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

Thanks,

Jamie

Posted: **Mon Apr 02, 2007 3:44 am**

You shouldn't have any issues with that.

Todd

Batboard

Help, carrier rise time on CDM

Help, carrier rise time on CDM