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Programmer - Pulse Measurement Acceptable Flux

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Old 04-11-2004, 09:36 PM
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sillyness
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Default Programmer - Pulse Measurement Acceptable Flux

What's an acceptable fluctuation when the Hitec programmer is measuring the pulse the RX is getting?

Is 1, sometimes 2 microseconds OK, or that too much fluctuation?

I probably never would have noticed, but the 8611 with a 3" horn moves a good bit with a 1 microsecond change. I thought I was getting interference, so I hooked the programmer up and saw the small fluctuation. My 5945's seem to have about a 2-3 microsecond deadband (desirable for ganging!), which doesn't show the RX pulse flux clearly.


Basically, I want to know if the small flux is noise or if it's normal operation.

Thanks a gaggle,
Jason
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Old 04-11-2004, 11:29 PM
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Phil Cole
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Default RE: Programmer - Pulse Measurement Acceptable Flux

1 us is probably right at the resolution of the transmitter, so you can expect some variation, depending on how close your stick happens to sit to a quantising boundary. This would happen whether you're using PPM or PCM.

If it's a PPM transmitter, it may be the noise in the receiver is enough to give you 1 us of jitter.
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