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Dual Conversion crystal PPM Rx

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Old 07-23-2004, 07:40 PM
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Rippah
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Default Dual Conversion crystal PPM Rx

Will a Dual conversion crystal work in a PPM receiver?
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Old 07-23-2004, 10:55 PM
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Phil Cole
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Default RE: Dual Conversion crystal PPM Rx

If it's a dual conversion receiver.

PPM/PCM has nothing to do with dual/single conversion. Receivers can be had in all four combinations.
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Old 07-24-2004, 01:49 AM
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Default RE: Dual Conversion crystal PPM Rx

Thats the problem, I dont know if it's dual or single. Its a FEIGAO 6ch mini 36mhz PPM. I tried it in PPM no joy then PCM using my Futuba 7UAPS. The only thing I can think of it must be the dual conversion crystal. SO I'm guessing if I swap it for a single I should be right?
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Old 07-24-2004, 08:22 AM
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Default RE: Dual Conversion crystal PPM Rx

PCM mode is only operational with like original equipment. This means only a Futaba PCM RX will work with a Futaba TX in the PCM mode. The code is proprietary and does not work with any other PCM equipment...

For the most part you'll have to use a crystal that meets the requirements of the specific RX in use, single/dual conversion is a secondary consideration but an absolute must. Crystals are not generally interchangeable from one manufacturer to the next. The crystal does not differentiate between PPM/PCM modulation modes, this true at of the TX and RX.
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