: New Product
2.4GHz Hitec A-FHSS Compatible Receiver available
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Aug 20, 2012
, 03:06 PM
...just an earth bound misfit
Joined Mar 2010
Wireless trainer link - glitches and calibrations clarified
Attached is some evidence for a runt pulse from the VD5M that doesn't show up in wired "pupil mode" PPM transmissions from the A9. The scope was triggering on falling edges, and the closed box with 3V amplitude could only occur with a glitch. It was very intermittent (just like the mSR & phoenix cyclic issue) and only seemed to occur when I was stick banging. Possible logic race on interrupt handling? Perhaps only occurring if RF frames are lost?
The other two attachments show clean frames with 506us pulses from the VD5M and 405us pulses from the A9. It seems like the "calibration mismatch" is likely a result of phoenix measuring servo inputs as the difference between the period and the pulse.
Seems to all make sense to me now.
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Evidence of a runt pulse from VD5M wireless trainer link for A9.
No evidence of a runt pulse from direct wired pupil mode for A9.
Gyro channel from VD5M wireless trainer link for A9
Gyro channel from direct wired pupil mode for A9.