There are few Arduino based balloon trackers that generate WPSR and APRS
signals. There is an Arduino library called JT8Encode which is the
software behind some of them. This is the entire signal processing from
bytes to RF but easily adapted to insertion at any point in the
processing.
I've been messing about with a function which exports the tone
parameters and sends them to a UDP program which then programs a DDS.
Not for LF/VLF, this is for a multiplied transmit chain on SHF. The GFSK
transitions in FT8 etc are added later in wsjt-x but for this lash-up, I
took the values
Someone I know has forked WSJT-X to get the tone sequence at the start of
the TX cycle, which he then passes to a microcontroller embedded inside an
FM radio, which is set up to change the frequency of the unmodulated FM
carrier as per FT8 tones. RX is an RTL dongle. He makes contacts this way,
so
You still build a transmitter and or receiver, but it is not a "whole
SSB rig" as mentioned.
Just a PA driven with a pair of D/A chips followed by a filter or tank
circuit to the antenna. The essence of an SDR.
At much higher frequencies, that could be mounted at the antenna to save
on
And what is going to be transmitting this IQ data? Where's the D/A conversion?
Mike W9MDB
On Monday, December 21, 2020, 08:15:23 AM CST, Tim Madden
wrote:
Would it be easiest for the software to have a port for UDP IQ data on both RX
and TX?
Then we only need to add the
Would it be easiest for the software to have a port for UDP IQ data on
both RX and TX?
Then we only need to add the operating frequency for the bottom of the
band to the software configuration for each UDP port number our station
can support.
That would open the application to any operating
