X-347 & JR Synthesized module

[slink]

Hi,
Does anyone know if the JR synthesized TX module can be used with the X-347? The model numbers are TS-35J on the synthesized unit versus NET-J35P on my existing module. Also, does the PCM encoding come from this module, or internal to the tx, as the 347 supports PCM C (rather than the current PCM S standard), which appears to be a defunct standard these days...
Thanks,
Steve.

[Alfred]

The synthesized TX modules fit any of the JR TX's as it just provides the RF part.
The encoding is done within the TX independent of the RF Module.
The restriction of your modulation type is dependent on your RX as you can't change it.
Example: RX uses FM, you have to set your TX to PPM
RX uses PCM "S" you have to set your TX to PCM "S"

I have never heard of "C" modulation, do you have a Link that explains it?

[slink]

I've not got any info on PCM C, I'll try to dig out my manual and see if it says anything in there.

I tried my X-347 with a JR RS77S synthesized PCM S RX, with no joy - it got to the end of the scan and the light flashed slowly, indicating an error or no signal, so it looks as if the PCM C is not compatible wiht PCM S anyway!

If anyone knows any different, then please shout!
Steve.

[Alfred]

I have got the same RX in my brand new Stratus using my JR 10S TX and it works flawless.
Considering that the RS77S is one of the latest receivers from JR then "S" modulation is hardly outdated.
I have seen quite a few posts now where pilots had lockout issues in regards to the Stratus with the very latest RF electronics.
Considering that this hasn't been an issue on mine and I also use an internal mounted Deans antenna which reduces your normal range anyway, it proofs the fact that the "S" modulation is still on par with anything else out there in the market.

So
Unless you are prepared to shell out the big Dollars to get either a futaba 12z or 14mz system, which does provide an 2048 bit resolution system among other things, then I would just get the synthesized TX module and be done with it.
:smokin:

By the way, mine is the TS36J module as we use the 36MHz band here in Australia.

[kgfly]

Or you could go with 2.4GHz and not have to worry about crystals falling out (there aren't any), glitches, shoot downs or frequency control :wink:

[slink]

Apologies - it wasn't S I was referring to as being outdated, it was C, which is what my 347 supports - original edited to read more clearly!
Steve.

[Peter]

it was " Z " pcm prior to " S " , in Australia anyway!! :dontknow :dontknow

[DavidH]

I was Z modulation here in the USA also prior to the S modulation.

Sounds like the C modulation may be 512 PCM.

S modulation is 1024 PCM.

David