开云体育

Kent,

I've used that sketch recently, but not with an Arduino Shield. It's a straightforward demo that works, though.

As far as required software changes, you'll find them in this section of the code:

#define Message "CALLSIGN " // Your callsign (or message) here! Remember to put a space at the end!
#define Frequency 10000000 // Transmission frequency, in Hz
#define Fsk 5 // FSK amount for FKSCW and DFCW, in Hz
#define Mode MODE_QRSS // Transmission mode: MODE_QRSS is used for QRSS or CW
#define Speed 0 // Dit speed: 0, 1, 2, 3 index into the speeds[] array, see below. 0 is 12wpm CW
#define XTAL_FREQ 27000000 // Crystal frequency for Si5351A board - needs to be adjusted specific to your board's crystal

Edit the first two lines to set your callsign and transmit frequency.? For an initial test, leave everything else as is, as long as your crystal is 27MHz.? The program will send standard 12wpm cw at the assigned frequency -- or at least it did so for me. Monitor on an external receiver.

At this point, I don't have an assembled shield, so I can't help much with the hardware.? There are some jumpers required on the shield.? Be sure to place a dummy load (47-51 ohm resistor) across the RF output.? You might consider leaving the final amp (BS170) unpowered for initial testing.

72,
Michael? KD4SGN