Full digital radio, no ppm

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Full digital radio, no ppm

Postby fernandez » Mon Jun 07, 2010 9:19 pm

The cpu should just sample the pot's and switches to digital values and direct transmit, without any ppm conversion.
By configuration all channels and functions should be possible to assign.
Does a tx like this excist?
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Re: Full digital radio, no ppm

Postby beau0090_99 » Tue Jun 08, 2010 11:54 am

I assume the radios with built-in 2.4Ghz, that don't have modules work this way, but maybe they haven't evolved that far yet. I don't know.
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Re: Full digital radio, no ppm

Postby RobC » Tue Jun 08, 2010 4:33 pm

but what about mixer output, rates etc?
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Re: Full digital radio, no ppm

Postby RCModelReviews » Tue Jun 08, 2010 10:16 pm

There is no reason why native 2.4GHz systems need an internal PPM signal.

Indeed, there are many benefits to be had from going 100% digital and simply ending up with a (preferably) 12-bit binary number for each channel that represents the servo position.

This removes an extra stage of processing (and consequent loss of resolution) so it is actually *simpler* to do this than to first create a PPM stream and then turn that stream back into those binary numbers again.

I'd really love to see a Chinese manufacturer design a fully-digital 2.4GHz radio that established a digital-interface standard for 3rd-party modules.

This would mean that FrSky, Corona, Assan, FlyDream and all the others could produce "100% digital" modules that would plug into the back of such a transmitter and other manufacturers could produce their own radios with the same "standard" interface that would also accept those modules.

No longer would we have to put up with relatively high (and non-deterministic) latencies caused by converting a PPM stream and instead we could have cool stuff like automatic model-memory select, telemetry that used the radio's own LCD display, etc.

Of course, the competitive marketplace being what it is and with each manufacturer trying to lock customers in to their own proprietary standards, this is probably never going to happen.
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