In article ,
says...


Active8 wrote:

boy, i must have had a bad day.

Yeah, but it saves the rest of us a lot of typing....


almost ROFLMAO^2

mike

In article ,
says...


Active8 wrote:

boy, i must have had a bad day.

Yeah, but it saves the rest of us a lot of typing....


almost ROFLMAO^2

mike

In article , says...
"Allan York" wrote in message
om...
Hi, I am looking for advice on how to integrate a PIC microchip with a
ham radio transciever. I will use this in a robot. I am looking for
100 - 300 mile range. I have a ham radio license.

Thanks for the help

Y'know, this is the first ham radio operator I've ever encountered who
DIDN'T sign a radio-related post with his callsign.

Makes ya wonder, doesn't it???



that's the first thing i looked for when i read the post and that got me
on a roll. the absurdity of the whole post wasn't lost on me either.
you'd expect a question more along the lines of how to decode the FSK or
RTTY used in the ham RC band, the freq of which he most likely didn't
even know.

mike

In article , says...
"Allan York" wrote in message
om...
Hi, I am looking for advice on how to integrate a PIC microchip with a
ham radio transciever. I will use this in a robot. I am looking for
100 - 300 mile range. I have a ham radio license.

Thanks for the help

Y'know, this is the first ham radio operator I've ever encountered who
DIDN'T sign a radio-related post with his callsign.

Makes ya wonder, doesn't it???



that's the first thing i looked for when i read the post and that got me
on a roll. the absurdity of the whole post wasn't lost on me either.
you'd expect a question more along the lines of how to decode the FSK or
RTTY used in the ham RC band, the freq of which he most likely didn't
even know.

mike

On Sat, 2 Aug 2003 15:28:00 -0500, "John R. Strohm"
wrote:

"Allan York" wrote in message
. com...
Hi, I am looking for advice on how to integrate a PIC microchip with a
ham radio transciever. I will use this in a robot. I am looking for
100 - 300 mile range. I have a ham radio license.

Thanks for the help

Y'know, this is the first ham radio operator I've ever encountered who
DIDN'T sign a radio-related post with his callsign.

Makes ya wonder, doesn't it???

Not really. I've got one but I don't shout about it. Chiefly because I
frequently ask seriously ***dumb*** questions the nature of which I
should already know. Saves embarrasment. :-)


--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

On Sat, 2 Aug 2003 15:28:00 -0500, "John R. Strohm"
wrote:

"Allan York" wrote in message
. com...
Hi, I am looking for advice on how to integrate a PIC microchip with a
ham radio transciever. I will use this in a robot. I am looking for
100 - 300 mile range. I have a ham radio license.

Thanks for the help

Y'know, this is the first ham radio operator I've ever encountered who
DIDN'T sign a radio-related post with his callsign.

Makes ya wonder, doesn't it???

Not really. I've got one but I don't shout about it. Chiefly because I
frequently ask seriously ***dumb*** questions the nature of which I
should already know. Saves embarrasment. :-)


--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

Me neither.

"Keith Poindexter" wrote in message
...
No..
"John R. Strohm" wrote in message
...
"Allan York" wrote in message
om...
Hi, I am looking for advice on how to integrate a PIC microchip with a
ham radio transciever. I will use this in a robot. I am looking for
100 - 300 mile range. I have a ham radio license.

Thanks for the help

Y'know, this is the first ham radio operator I've ever encountered who
DIDN'T sign a radio-related post with his callsign.

Makes ya wonder, doesn't it???

Me neither.

"Keith Poindexter" wrote in message
...
No..
"John R. Strohm" wrote in message
...
"Allan York" wrote in message
om...
Hi, I am looking for advice on how to integrate a PIC microchip with a
ham radio transciever. I will use this in a robot. I am looking for
100 - 300 mile range. I have a ham radio license.

Thanks for the help

Y'know, this is the first ham radio operator I've ever encountered who
DIDN'T sign a radio-related post with his callsign.

Makes ya wonder, doesn't it???

I've done a fair amount of playing around with PIC16F876's. They
have two built in PWM generators. You set the overall carrier
frequency by writing to a register and then control duty cycle as
you need it. Turns out to be very low overhead.

Hope this helps.
Bruce/ND8I


"xpyttl" wrote in message
...
I'm pretty disappointed at the amount of flame this posting generated.

snip

Secondly the shape of the waveform is an issue. It's real easy to
generate
square waves from the PIC, but in most cases, these will generate lots of
spurious output. Depending on the application and the sort of encoding
you
will use, you will need to come up with nice sine waves. There really are
3
ways to do this ... in many applications you can simply get away with a
good
low pass filter between the PIC and the radio. This will take a bunch of
tweaking, though, and you will need a good scope, and preferably a
spectrum
analyzer to get it right. You can also generate the sine wave by having
the
PIC output the sine wave using pulse width modulation and a little
filtering. In my experience, you can get extremely good sine waves this
way, BUT the PIC is 100% dedicated to the task, which means your data
rates
will need to be low. The third approach is to build an oscillator that
you
can control with the PIC. Given that you will probably need only two
frequencies, this may not be such a bad approach.

snip

I've done a fair amount of playing around with PIC16F876's. They
have two built in PWM generators. You set the overall carrier
frequency by writing to a register and then control duty cycle as
you need it. Turns out to be very low overhead.

Hope this helps.
Bruce/ND8I


"xpyttl" wrote in message
...
I'm pretty disappointed at the amount of flame this posting generated.

snip

Secondly the shape of the waveform is an issue. It's real easy to
generate
square waves from the PIC, but in most cases, these will generate lots of
spurious output. Depending on the application and the sort of encoding
you
will use, you will need to come up with nice sine waves. There really are
3
ways to do this ... in many applications you can simply get away with a
good
low pass filter between the PIC and the radio. This will take a bunch of
tweaking, though, and you will need a good scope, and preferably a
spectrum
analyzer to get it right. You can also generate the sine wave by having
the
PIC output the sine wave using pulse width modulation and a little
filtering. In my experience, you can get extremely good sine waves this
way, BUT the PIC is 100% dedicated to the task, which means your data
rates
will need to be low. The third approach is to build an oscillator that
you
can control with the PIC. Given that you will probably need only two
frequencies, this may not be such a bad approach.

snip