RE: TI-H: Radio Link
[Prev][Next][Index][Thread]
RE: TI-H: Radio Link
I've decided to change my plan... I'm throwing out 38400 and using 300.
Then the entire radio link will cost under $10 to make...and still have the
same range...
>Hi Grant!
>
>What modulation scheme are you using (amplitude, frequency, phase, pulse
>duration, etc) ? If it costs $80 for a pair, then you must be buying RF
>modules and building the interface to your calc (or making the whole thing
>but using a lot of expensive components that you may not need). If you
>are getting 38400, you must be using quadrature phase modulation at 2GHz.
>Are you using a digital phase locked loop and VCO module? I know that
>there is a 902-928MHz band that you can use without a license, but you
>can't transmit more that 100mW. Give me more details. I was going to
>work on one this summer and would like to see your approach. My plan is
>to use the same technique as cell phones. They transmit a lot of digital
>data and use few expensive components.
>
>What is your plan for the PCB's? If you get high data rates you have to
>control the characteristic impedance of the traces carrying the RF
>signals. Do you etch your own boards? One sided or two? So many
>questions...
>
>Mike
>
>
>
>-----Original Message-----
>From: Grant Stockly [SMTP:gussie@alaska.net]
>Sent: Saturday, April 25, 1998 7:58 PM
>To: ti-hardware@lists.ticalc.org
>Subject: TI-H: Radio Link
>
>
>So far I was able to construct a perfect working link that operates at
>about 38400 and transmits arround a few miles... The problem is that 2
>cost $80...