Whites V3i coil signal.

[ZBIQ]

Hi!

I`m looking for shape of driving signal in Whites coil.
I`ve seen some other Multi-frequency signals (if you have any - please post it too) but this time I`m specially interested in V3i signal.

Also I would like to know what technique of receiving MF signal is used.
Just one resonant circuit with extended bandwitch, or more complex thing ?
Thanks!

[golfnut]

I dont think we can talk too detailed on here as it is a relatively modern kit and may still be in production..


My guess is the 3 tones are generated in dsp and all feed a driver amp to coil

The Rx splits anything received into 3 separately tuned Rx.


I suspect the Tx and Rx coils are resonant at the lowest freq and the mid and Hi tones are odd harmonics of the lowest Tx freq so they resonate too.

S

[Carl-NC]

The TX drive is a multi-period digital waveform. I think it was published in a short paper I wrote when the unit was introduced.

On the RX side, the preamp is broadband and then the signal is split into 3 narrowband demod channels, much like any normal multiband radio.