Hello Yishuai,
>When you say RF, are you talking about FM over
VHF? Maybe SSB over HF? The transport details really matters here
I currently have FM over VHF/UHF. I suppose the modulation and
frequency limit the transmission rate. Are there other factors
that are affected?
There are lots of factors for sure including the robustness of the
mode, noise floor of the frequency, width of the passband, the
regional legality of symbols/sec of the transmitter, etc.? it goes
on and on.
>What kind of speed is required here?
Do you want to do everything via AX.25 or are you looking for
something far simplier like minimodem?
I plan to start with RTTY, typing on one computer and printing
on another, without packeting. After that I want to build a
server that speaks HTTP, maybe over Bell 103.
Personally, I personally wouldn't bother with RTTY as it's not 8bit
clean (if you need to send binary data), it's not very robust, it's
quite slow (especially for a medium like FM over VHF), etc.
What operating system are you looking to run this
"application" on? Windows, Linux, Mac, something else?
I have Windows, Linux, Mac, Android, and iOS. I'll start with
Linux, which seems to have the most tools available. I'll then
port to more platforms, so that all my devices can open up a
browser and interact with the server.
Is your goal to send arbitrary strings?? Maybe you want to send
files?? Is this all point to point or is there any in-between
infrastructure being used (digipeaters, etc)?? How are you intending
to interface to these modems?? For example, ARDOP has a very robust
API for sending both FEC and ARQ protected strings.?
--David
