Post by thread:[OT] [EE] 2400 baud MSK modem?

Can someone suggest a chip for a 2400 MSK modem (which is FSK at 2400 baud with the frequencies being 2400 and 1200 Hz). I'd like a simple chip that is suitable for a radio application. I'd like something simple, like the old (discontinued) MX614 chip. Thanks, Art

KY1K wrote: > Can someone suggest a chip for a 2400 MSK modem (which is FSK at 2400 > baud with the frequencies being 2400 and 1200 Hz). I'd like a simple > chip that is suitable for a radio application. > > I'd like something simple, like the old (discontinued) MX614 chip. > > Thanks, > > Art > > This site says it has the MX614: http://www.glitchbuster.com/ so if you just want one or two, that might be a way to go. If you want a project, a pic could likely do the same job.

The MX614 can't be used at 2400, it stops at 1200 baud. Any other suggestions?? Thanks, Art At 02:18 PM 6/28/2005, you wrote: {Quote hidden}>KY1K wrote: >>Can someone suggest a chip for a 2400 MSK modem (which is FSK at 2400 >>baud with the frequencies being 2400 and 1200 Hz). I'd like a simple chip >>that is suitable for a radio application. >>I'd like something simple, like the old (discontinued) MX614 chip. >>Thanks, >>Art >This site says it has the MX614: http://www.glitchbuster.com/ >so if you just want one or two, that might be a way to go. > >If you want a project, a pic could likely do the same job. >

The CMX469A? An Atmel ATMEGA8 can do it using its ADC and some DSP filtering leaving room for more tasks. Mark Jordan - PY3SS On 28 Jun 2005 at 16:58, KY1K wrote: {Quote hidden}> The MX614 can't be used at 2400, it stops at 1200 baud. > > Any other suggestions?? > > Thanks, > > Art > > At 02:18 PM 6/28/2005, you wrote: > >KY1K wrote: > >>Can someone suggest a chip for a 2400 MSK modem (which is FSK at 2400 > >>baud with the frequencies being 2400 and 1200 Hz). I'd like a simple chip that > >>is suitable for a radio application. I'd like something simple, like the old > >>(discontinued) MX614 chip. Thanks, Art > >This site says it has the MX614: http://www.glitchbuster.com/ > >so if you just want one or two, that might be a way to go. > > > >If you want a project, a pic could likely do the same job. > >--

Thanks Mark, The chip has more pins than I'd like, but only uses 1.5 ma....which is good. Wish the setup was a little simpler (like the tcm3105), but this one should work fine. Appreciate the info. Have a great day and a better tomorrow. Art At 10:38 PM 6/28/2005, you wrote: {Quote hidden}> The CMX469A? > > An Atmel ATMEGA8 can do it using its ADC and some DSP filtering > leaving >room for more tasks. > > Mark Jordan - PY3SS > > >On 28 Jun 2005 at 16:58, KY1K wrote: > > > The MX614 can't be used at 2400, it stops at 1200 baud. > > > > Any other suggestions?? > > > > Thanks, > > > > Art > > > > At 02:18 PM 6/28/2005, you wrote: > > >KY1K wrote: > > >>Can someone suggest a chip for a 2400 MSK modem (which is FSK at 2400 > > >>baud with the frequencies being 2400 and 1200 Hz). I'd like a simple > chip that > > >>is suitable for a radio application. I'd like something simple, like > the old > > >>(discontinued) MX614 chip. Thanks, Art > > >This site says it has the MX614: http://www.glitchbuster.com/ > > >so if you just want one or two, that might be a way to go. > > > > > >If you want a project, a pic could likely do the same job. > > >--