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CANOMOD . Experience RC . Heli-Max

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Radio - Servo - Gyro - Gov - Batt > TX/RX eCCPM Output Test Results
 
 
SP4772
Senior Heliman
Location: Mirabel, Québec, Canada

My Posts This: Topic  Forum

So what is the next step if the Futaba 9C Super do not work like it should? I thought i had a good tx...well, i'll look for DX7 or JR then.

WWJD??
12-22-2007 Over year old.
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PietervA
Veteran
Location: New Zealand

My Posts This: Topic  Forum		EDIT
12-22-2007 Over year old.
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RCSoar
Heliman
Location: UK

My Posts This: Topic  Forum		Encoding differences between PCM-G3 and 2.4 GHz

Well I've been looking at the latency posts with great interest, and marvelling at John K's most valuable work in this area. Thanks John, this has been of great interest.

I'd be grateful for some guidance on a related issue. This is to do with the encoding scheme used in Futaba's PCM-G3 and 2.4 GHz transmission modes. This relates specifically to the 12FG but the same would apply to the 12Z and 14MZ.

Am I right in thinking that both the PCM-G3 and 2.4 GHz transmission modes actually share the same 'G3' encoding scheme? In which case the only differences are the way the data stream is transmitted (narrowband FM v. spread spectrum). Am I correct in this assumption?

In the UK the TM-14 module isn't available and there isn't any documentation which I could find on this.

Thanks in advance.
Mike Shellim
RC-SOAR.COM
01-07-2008 Over year old.
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DS 8717
rrProfessor
Location: Here wishing i was somewhere else

My Posts This: Topic  Forum
Quote 
So what is the next step if the Futaba 9C Super do not work like it should? I thought i had a good tx...well, i'll look for DX7 or JR then.
Alea Jacta Est...

The 9c is Futaba's "Edsel"

No Es Mi Culpa
01-07-2008 Over year old.
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GimbalFan
rrProfessor
Location: Copter County, Nv

My Posts This: Topic  Forum		As a die-hard Airtronics fan, I'm looking forward to see how their 2.4gHz module/rx for the Stylus performs when it's released later this year.

op-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-t
01-07-2008 Over year old.
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Dr.Ben
Elite Veteran
Location: Richmond, VA, USA

My Posts This: Topic  Forum		Nah.

Not an Edsel.

Edsels didn't sell. Futaba has sold a blue million 9C's.

More like a Taurus.

Not the fastest car on the block, but it gets the job done for a great many pilots.


Ben Minor
01-07-2008 Over year old.
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JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		Just thought I would update this thread by saying...

12Z with TM-14 has excellent CCPM. Fully sync'd and simultaneous swash channel output pulses.

X9303 has excellent CCPM. Fully sync'd.

- John
01-17-2008 Over year old.
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GimbalFan
rrProfessor
Location: Copter County, Nv

My Posts This: Topic  Forum		To save a long re-read, do you recall whether the Stylus' pulses are sync'd?

op-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-t
01-17-2008 Over year old.
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TMoore
rrProfessor
Location: Cookeville, TN

My Posts This: Topic  Forum		They are not.

TM

I thought I wanted a career, turns out I just wanted the paychecks.
01-17-2008 Over year old.
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GimbalFan
rrProfessor
Location: Copter County, Nv

My Posts This: Topic  Forum		Awww... well that does it.

op-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-t
01-17-2008 Over year old.
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JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		Hey now... For whatever reason, despite not having fully sync'd pulses, the Stylus has excellent CCPM. Here is plot of the rx output during a fast collective change. I believe it is because the CCPM mixing is excellent and the channels can fully change in one frame.



- John
01-17-2008 Over year old.
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GimbalFan
rrProfessor
Location: Copter County, Nv

My Posts This: Topic  Forum		Ahhh... that's better.

op-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-thwõp-t
01-17-2008 Over year old.
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JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		The Futaba T7C 2.4 GHz with an R617FS has great CCPM characteristics. The three channels have sequential pulses (6, 1, then 2) with some slight overlap of 6 and 1 depending on the pulse width. Those three channels appear to stay sync'd.

The channel output scheme of the R617FS is 7-6-1-2-3-4-5.

Oh, and good news too, is that there is no sign of "slew rate limiting" as noted previously on the 6EX 2.4, 7C, and 9C Super.

- John
01-18-2008 Over year old.
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Ace Dude
Elite Veteran
Location: USA

My Posts This: Topic  Forum		I'm looking forward to seeing how the R608FS compares to the R6014FS when the R608 becomes available for testing.



01-18-2008 Over year old.
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Flying Tivo
Veteran
Location: Monterrey,NL,Mexico

My Posts This: Topic  Forum		Grouping

John:

I really dont understand 7-6-1-2-3-4-5.
Do you mean 7-612-345 ??????? Or what?
Felipe
01-18-2008 Over year old.
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JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		> I really dont understand 7-6-1-2-3-4-5.
> Do you mean 7-612-345 ??????? Or what?

No, sorry, that is not the grouping data wise, but rather the pulse output sequence from the receiver.

- John
01-18-2008 Over year old.
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Flying Tivo
Veteran
Location: Monterrey,NL,Mexico

My Posts This: Topic  Forum		John:
Are you reading this pulses from the Data Port or the channels themselves?
Felipe
01-18-2008 Over year old.
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JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		The rx servo output pins.

- John
01-18-2008 Over year old.
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AAKEE
Senior Heliman
Location: Boden, Sweden

My Posts This: Topic  Forum		JKos ---> do you have a picture of the Dx7 caracteristics ?

I just found 'god behaviour' in a post.
01-23-2008 Over year old.
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DKflyer
Senior Heliman
Location: Huntington, WV

My Posts This: Topic  Forum		John,

Any word yet on the 8 channel FASST receiver? Will it have the same characteristics at the 14 channel?


Thanks,

DK
01-23-2008 Over year old.
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Radio - Servo - Gyro - Gov - Batt > TX/RX eCCPM Output Test Results
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