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What is Z modulation for JR 9303

Old 11-21-2007, 06:42 PM
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fastplane
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Default What is Z modulation for JR 9303

What is Z modulation for the JR 9303 TX? What does it do? Is that something like PPM and PCM?
Thanks.
Old 11-21-2007, 07:01 PM
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jonlowe
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Default RE: What is Z modulation for JR 9303

That is the original JR PCM modulation. 512 vs. 1024 of S PCM.
ORIGINAL: fastplane

What is Z modulation for the JR 9303 TX? What does it do? Is that something like PPM and PCM?
Thanks.
Old 11-21-2007, 07:06 PM
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fastplane
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Default RE: What is Z modulation for JR 9303

Thanks for the reply. Having the original instead of the 1024 is that good or bad?
Old 11-21-2007, 07:18 PM
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jonlowe
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Default RE: What is Z modulation for JR 9303

Its only for backward compatibility with old JR Z PCM receivers. Can't even buy them anymore. S PCM is more precise.

Jon
Old 11-21-2007, 07:31 PM
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fastplane
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Default RE: What is Z modulation for JR 9303

OK. Thanks. I had sent TX back for small repair and check up and it came back saying they loaded latest firmware and enabled Z modulation.
However, when I turn the TX on for modulation it shows choice of PPM and SPCM.
I guess as you say then, it would be compatible with older receivers if I had one. I only have newer ones.

Old 11-21-2007, 07:42 PM
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onewasp
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Default RE: What is Z modulation for JR 9303

That update (back date??) was added after the XP9303 first came out. If memory serves me correctly it WAS a part of the European version but not in the US version.

There were gripes about the difference so Horizon offered the Update which really is a back date which really was unnecessary for most users.[X(][]
Old 11-22-2007, 04:57 AM
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Mac_Man_UK
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Default RE: What is Z modulation for JR 9303

For some reason ZPCM transmitters had the ability to set the delay time before Failsafe kicked in. When JR introduced SPCM they removed this feature and went for a fixed delay time.

There are still a lot of ZPCM receivers out there still in use and working very well.

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