HiTec goes IPD !!!!  
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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Hitec/MultiPlex Radios- Ask Hitec Customer Service >> HiTec goes IPD !!!!
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HiTec goes IPD !!!! - 2/19/2004 6:53:58 PM   
DavidO



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Joined: 8/26/2002
From: Lancs, UNITED KINGDOM
Status: offline 		Mike, what other Hitec receivers are planned to use IPD ?
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RE: HiTec goes IPD !!!! - 2/19/2004 7:33:24 PM   
mglavin



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Joined: 11/29/2001
From: Elverta, CA, USA
Status: offline 		I'm not the Mike you addesed this too. He's away for the time being...

BUT, to the best of my knowledge Hitec does not ofer any IPD RX's at this time. Did you see something that lead you to beleive there were Hitec IPD RX's available?

Hitec RCD, Inc which now owns Multiplex Modelsport however does offer IPD RX's.

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RCU Community Moderator
Hitec * Multiplex Field Representative

(in reply to DavidO)
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RE: HiTec goes IPD !!!! - 2/19/2004 10:53:26 PM   
DavidO



Posts: 108
Joined: 8/26/2002
From: Lancs, UNITED KINGDOM
Status: offline 		Thanks Mike,

Check out the HiTec website, it's showing their new 3 channel IPD Micro receiver.
I was a suprised as the next guy but I guess an each way bet (QPCM and IPD) must give you a winner.
Regards - DavidO

(in reply to mglavin)
       Post #: 3

RE: HiTec goes IPD !!!! - 2/20/2004 3:04:18 AM   
mglavin



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Joined: 11/29/2001
From: Elverta, CA, USA
Status: offline 		David

I saw the info on the surface frequency 3-channel IPD RX. This is a great new development for surface equipment...

Hopefully there’s more to come.

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RCU Community Moderator
Hitec * Multiplex Field Representative

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RE: HiTec goes IPD !!!! - 2/28/2004 12:02:56 PM   
madhun


 

Posts: 23
Joined: 5/22/2003
From: Karlsruhe, GERMANY
Status: offline 		I would 've liked better to see Multiplex coming up with decent PCM receivers with Hitec-technology than vice versa. Multiplex receivers including IPD are OK, but not even close to JR/Futaba PCM. I've been flying Multiplex transmitters for years and like 'em. Just the receivers are sometimes a pain in the ass.

(in reply to mglavin)
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RE: HiTec goes IPD !!!! - 2/28/2004 3:31:12 PM   
mglavin



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Do some searches in the Radio Forum. We discussed this quandary recently. It's my belief and others that the IPD technology works as well as PCM in nearly every circumstance. Albeit IPD does things for differing reasons be it the specific technology or limitations thereof. Fact is it works and the newest wave of DSR, together with IPD has opened a whole new perspective to PPM...

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RE: HiTec goes IPD !!!! - 2/28/2004 5:42:24 PM   
madhun


 

Posts: 23
Joined: 5/22/2003
From: Karlsruhe, GERMANY
Status: offline 		You are right - the concept of IPD sure is an improvement to PPM. The thing I was really complaining about, was the quality of MPX RX in general. They put out complete lines of RX that had great trouble with interferences, thus often unusable in electrics (pico), planes with ignition and jets (IPD DS 9 before the update). They fixed it, of course, but it's just a little unsettling. I don't want to be the tester for MPX. Multiplex is (was) a rather small company with sometimes quite interesting new ideas, and a TX software that is still unreached, but being small sometimes makes it difficult to be at the "edge of technolgy" in all fields. And since Hitec has the QPCM system, which seems to work quite well, why not just come up with a new HF module for Profi and Evo line and use Hitec PCM RX?

(in reply to mglavin)
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RE: HiTec goes IPD !!!! - 2/29/2004 1:25:18 AM   
mglavin



Posts: 5203
Joined: 11/29/2001
From: Elverta, CA, USA
Status: offline 		A PCM encoding scheme is not of any TX module. An FM TX module is just that an FM TX module; it matters not what scheme fronts it. PCM and PPM and now IPD are all modulation schemes. Not to be confused with AM/FM which are the medium used to transmit a specific data scheme, i.e., PPM/PCM/IPD...

In today’s equipment the PCM and PPM scheme is on a micro-chip located within the TX and corresponding RX. You change the TX RF modules all you want.

I am not familiar with Multiplex equipment to wit, BUT my son and I now have in our possession the EVO 12 and IPD 12 channels RX's. Were hanging the gear in Josh new 38% CA Extra. I've heard nothing but good things of this equipment thus far.

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RE: HiTec goes IPD !!!! - 2/29/2004 8:49:52 AM   
HarryC


 

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From: private, UNITED KINGDOM
Status: online 		IPD is not a modulation, it is pure PPM. IPD is not used at any point in the transmission of the signal. It is just a type of error detection and signal processing done on the PPM within the Rx. The synth Rx advertising blurb says that their IPD can be switched off for range testing.

H

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RE: HiTec goes IPD !!!! - 2/29/2004 8:56:23 AM   
madhun


 

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quote:

...PPM and now IPD are all modulation schemes


IPD is not a modulation scheme - it is still PPM! Just the RX has become smarter (intelligent pulse decoding) - not the TX. That's why its compatible to other systems and also that's why it IPD cannot replace PCM. It's still analog versus digital.

quote:

A PCM encoding scheme is not of any TX module. An FM TX module is just that an FM TX module


You are right. The PCM encoding micro-chip is not in the TX-module. But why not? I don't now the circuits in TX - but it seems to me, that all this mc does ist to convert PPM into bits. (I assume a software update for the Profi-Line, that still have the PCM feature, wouldn't do it either)

Anyway, as I said, I love the MPX software features and the good quality of the TX - good plastic case, solid switches... I'm just missing PCM.

(in reply to mglavin)
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RE: HiTec goes IPD !!!! - 2/29/2004 9:27:07 AM   
HarryC


 

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quote:

ORIGINAL: madhun
You are right. The PCM encoding micro-chip is not in the TX-module. But why not? I don't now the circuits in TX - but it seems to me, that all this mc does ist to convert PPM into bits.


No, the encoding is done on the raw varying voltage coming from the pots/switches. Either send it through the PPM encoder or through the PCM encoder, so PCM is not PPM that has been turned into PCM. All the data encoding is done within the main Tx so that a pure data stream appears at the pins of the RF encoder and all it has to do is generate the correct frequency and add the data given to it by the Tx.

H

(in reply to madhun)
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RE: HiTec goes IPD !!!! - 2/29/2004 10:32:52 AM   
madhun


 

Posts: 23
Joined: 5/22/2003
From: Karlsruhe, GERMANY
Status: offline 		Oh Ok. So no chance getting Hitec PCM into old MPX TX. Too bad

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RE: HiTec goes IPD !!!! - 2/29/2004 3:20:35 PM   
mglavin



Posts: 5203
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From: Elverta, CA, USA
Status: offline 		Harry

Thanks for waking me up. I am aware of such. I was trying to convey a concept or something similar and got lost on they way and then stumbled... Maybe it was late too.

Do you think DSR is coming to Multiplex anytime soon?

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RE: HiTec goes IPD !!!! - 3/1/2004 3:33:00 PM   
HarryC


 

Posts: 1842
Joined: 2/10/2002
From: private, UNITED KINGDOM
Status: online
quote:

ORIGINAL: mglavin
Do you think DSR is coming to Multiplex anytime soon?


I have no knowledge or rumours of their future plans. Since they are now committed to PPM only, it would make sense to develop it further than IPD if DSR really is as good as FMA claims it is. Poor Mpx must be in a state of flux at the moment. Their direction setting owner was of their own country and culture, now their direction setting owner is from a very alien culture and I suspect it may take time for both sides to feel they are going the same way. I do hope that Mr Park encourages and finances the technical innovation and leadership that has been a tradition at Mpx.

Incidentally, having seen Hitec come out with a car Rx featuring Mpx's IPD, Mpx has just brought out a new jumbo digi servo with Karbonite gears! The tech transfer between the two firms seems to be under way and that should be good for both.

H

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       Post #: 14

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