Spektrum Dx8

[LONGFLYER]

Originalmente inviato da Paolo_56

Ciao a tutti,

mi piacerebbe sapere se, fra tutti quelli che hanno acquistato la DX8, e dopo ovviamente un certo periodo di utilizzo, rifarebbero volentieri questo acquisto o se invece butterebbero la DX8 alle ortiche

So benissimo che qualche piccolo difetto non è un problema (la perfezione è solo un'utopia ), però dopo aver letto sui problemi lamentati (e, spesso, fatti anche vedere su Youtube) comincio ad avere qualche dubbio.

Sono ancora indeciso fra la DX8 ed una possibile concorrente (a 9 canali)


Ciao,
Paolo

Aspetta qualche giorno che inizii la fiera di Norimberga ...

ps. Ti suggerirei una radio con 2.4Ghz in FHSS, lo stesso che JR ha usato nel suo nuovo 2.4Ghz e per cui ha abbandonato Spektrum, la quale assieme ad Assan e Corona sono gli unici 2.4Ghz rimasti in DSSS. Parlando invece di Futaba, alla fiera dovrebbe presentare l'aggiornamento del suo 2.4Ghz con la bidirezionalità ed anche una nuova versione software per la T8FG che quasi la stravolge (da 8+2 canali passa a 12+2, telemetria integrata, libero accesso al service menu ...).

[John Doe]

Originalmente inviato da LONGFLYER

Aspetta qualche giorno che inizii la fiera di Norimberga ...

ps. Ti suggerirei una radio con 2.4Ghz in FHSS, lo stesso che JR ha usato nel suo nuovo 2.4Ghz e per cui ha abbandonato Spektrum, la quale assieme ad Assan e Corona sono gli unici 2.4Ghz rimasti in DSSS. Parlando invece di Futaba, alla fiera dovrebbe presentare l'aggiornamento del suo 2.4Ghz con la bidirezionalità ed anche una nuova versione software per la T8FG che quasi la stravolge (da 8+2 canali passa a 12+2, telemetria integrata, libero accesso al service menu ...).

I don't think so...

[ JR Propo, Japan Open Letter regarding the rumors about DMSS and JR splitting from Spektrum DSM and Horizon Hobby | Facebook ]

«To Our Valued JR Customers:

During the recent BMFA Nationals, a new JR 7 channel radio system using DMSS was shown by our UK distributor. This system uses a technology that is incompatible with DSM2 in order to meet a market need where DSM2 is not available to JR. Unfortunately, several individuals made statements that JR finds very misleading and require correction.

JR remains committed to future development with DSM technologies and to our customers who currently own JR equipment using the DSM standard. JR will continue to manufacture, sell, and support DSM equipment in all markets currently allowed by agreement.

It is our goal that this communication clears up any questions about JR’s intentions and that JR remains confident in and committed to the future of DSM technology around the world.

We thank you for your continued support.

Kind regards

Mooney Takamura.
International Sales Manager
JR Propo»

NB:

[ JR Propo XG7 7-Channel 2.4GHz Radio System with Telemetry available from all good MacGregor Stockists ]

«DMSS stands for Dual Modulation Spread Spectrum, which basically means that it operates using a wider spread signal than a traditional ‘frequency hopping spread spectrum’ system (FHSS). By hopping using a widespread signal, DMSS is much more resistant to interference than a conventional frequency hopper.»

[LONGFLYER]

Originalmente inviato da John Doe

I don't think so...

[ JR Propo, Japan Open Letter regarding the rumors about DMSS and JR splitting from Spektrum DSM and Horizon Hobby | Facebook ]

«To Our Valued JR Customers:

During the recent BMFA Nationals, a new JR 7 channel radio system using DMSS was shown by our UK distributor. This system uses a technology that is incompatible with DSM2 in order to meet a market need where DSM2 is not available to JR. Unfortunately, several individuals made statements that JR finds very misleading and require correction.

JR remains committed to future development with DSM technologies and to our customers who currently own JR equipment using the DSM standard. JR will continue to manufacture, sell, and support DSM equipment in all markets currently allowed by agreement ... I think for the USA market only ...

It is our goal that this communication clears up any questions about JR’s intentions and that JR remains confident in and committed to the future of DSM technology around the world.

We thank you for your continued support.

Kind regards

Mooney Takamura.
International Sales Manager
JR Propo»

NB:

[ JR Propo XG7 7-Channel 2.4GHz Radio System with Telemetry available from all good MacGregor Stockists ]

«DMSS stands for Dual Modulation Spread Spectrum, which basically means that it operates using a wider spread signal than a traditional ‘frequency hopping spread spectrum’ system (FHSS). By hopping using a widespread signal, DMSS is much more resistant to interference than a conventional frequency hopper.»

Read here too, for example ... RC Model Reviews • View topic - JR DSMJ FHSS module and receivers

We'll see!!!

[John Doe]

Originalmente inviato da LONGFLYER

Read here too, for example ... RC Model Reviews • View topic - JR DSMJ FHSS module and receivers

There’s nothing to see here. Move on.

[ MacGregor Industries Modeller Support Centre - Frequently Asked Questions ]

«Some customers have expressed concern over the future availability of DSM2 products from JR. We would like to reassure you that JR DSM2 products will be available for the foreseeable future. Here are our thoughts on the subject, the contents of which have been approved by JR:

There are constant representations being made by other interested parties in the wavebands used for the radio control of models. This is not unique to 2.4 - it used to happen with the FM bands as well (and probably still does!). Anyone well versed in EU policy making would tell you that even if true, such a decision would take many years to come to pass. Even then, such restrictions are seldom applied retrospectively, so DSM2 users can be confident of continuation of supply for a long time to come. And even if DSM2 was restricted for newly imported transmitters in the distant future, additional DSM2 receivers will continue to be available, either as JR or Spektrum products. Our feeling is that Horizon will evolve their DSM2 technology long before any such ban could take effect. Product evolution is going to be a far more decisive factor concerning the future availability of DSM2 products, especially when driven by such a fast moving company as Horizon.

Regarding JR and DSM2, again there is no intention by JR to stop supplying us with DSM2 equipped radios. As far as MacGregor Industries are concerned we will continue to supply JR DSM2 radios for as long as they are available to us.

We will be introducing JR radios with their own DMSS technology as and when they become available. The first DMSS radio that will become available to us is the XG7 which uses Frequency Hopping Spread Spectrum (no k!) and offers telemetry. Since it is a completely new 2.4 system, it is not compatible with DSM2. XG7 is a mid-range radio but we hope to be able to offer more advanced JR DMSS sets sometime in 2011 (however at this time we have no information on the specifications of such a set).

So, to summarise, JR DMSS radios will be introduced alongside JR DSM2 radios. As far as we know, JR will continue to offer both types for us to import to the UK market.»

[ducati]

traduzione x i comuni mortali PLEASE

[LONGFLYER]

Originalmente inviato da John Doe

There’s nothing to see here. Move on.

[ MacGregor Industries Modeller Support Centre - Frequently Asked Questions ]

«Some customers have expressed concern over the future availability of DSM2 products from JR. We would like to reassure you that JR DSM2 products will be available for the foreseeable future. Here are our thoughts on the subject, the contents of which have been approved by JR:

There are constant representations being made by other interested parties in the wavebands used for the radio control of models. This is not unique to 2.4 - it used to happen with the FM bands as well (and probably still does!). Anyone well versed in EU policy making would tell you that even if true, such a decision would take many years to come to pass. Even then, such restrictions are seldom applied retrospectively, so DSM2 users can be confident of continuation of supply for a long time to come. And even if DSM2 was restricted for newly imported transmitters in the distant future, additional DSM2 receivers will continue to be available, either as JR or Spektrum products. Our feeling is that Horizon will evolve their DSM2 technology long before any such ban could take effect. Product evolution is going to be a far more decisive factor concerning the future availability of DSM2 products, especially when driven by such a fast moving company as Horizon.

Regarding JR and DSM2, again there is no intention by JR to stop supplying us with DSM2 equipped radios. As far as MacGregor Industries are concerned we will continue to supply JR DSM2 radios for as long as they are available to us.

We will be introducing JR radios with their own DMSS technology as and when they become available. The first DMSS radio that will become available to us is the XG7 which uses Frequency Hopping Spread Spectrum (no k!) and offers telemetry. Since it is a completely new 2.4 system, it is not compatible with DSM2. XG7 is a mid-range radio but we hope to be able to offer more advanced JR DMSS sets sometime in 2011 (however at this time we have no information on the specifications of such a set).

So, to summarise, JR DMSS radios will be introduced alongside JR DSM2 radios. As far as we know, JR will continue to offer both types for us to import to the UK market.»

We do not know what I mean: I'm writing that JR will not suspend the provision of DSM2 but will support a new product in FHSS. Certainly, JR will not abandon those who purchased its products in the past.

Why a new JR 2.4GHz in FHSS? Because, in many countries, as well as in Italy only FHSS link has free use ...

[firedragon]

Originalmente inviato da LONGFLYER

We do not know what I mean: I'm writing that JR will not suspend the provision of DSM2 but will support a new product in FHSS. Certainly, JR will not abandon those who purchased its products in the past.

Why a new JR 2.4GHz in FHSS? Because, in many countries, as well as in Italy only FHSS link has free use ...

what a headpain!! i don't care about DMSS or fhss or others. i like my bnf in dsm2, i have a lot of receivers in dsm2, i like my spektrum radio and i'm happy with them and never give my troubles..spektrum is a good radio!!!

[LONGFLYER]

Originalmente inviato da firedragon

what a headpain!! i don't care about DMSS or fhss or others. i like my bnf in dsm2, i have a lot of receivers in dsm2, i like my spektrum radio and i'm happy with them and never give my troubles..spektrum is a good radio!!!

I'm happy for you and have good flights!

[Paolo_56]

Originalmente inviato da LONGFLYER

We do not know what I mean: I'm writing that JR will not suspend the provision of DSM2 but will support a new product in FHSS. Certainly, JR will not abandon those who purchased its products in the past.

Why a new JR 2.4GHz in FHSS? Because, in many countries, as well as in Italy only FHSS link has free use ...

In effetti, molto spesso, le scelte dei Costruttori sono più che altro scelte di tipo commerciale e/o di marketing (seguono un po' quella che è la 'moda' del momento, magari sulla scia del successo del prodotto di un'eventuale concorrenza ).

Dal punto di vista tecnico, il metodo FHSS (ossia, il Frequency Hopping) mi piace molto; tuttavia mi sembra che il DSM2 di Spektrum sia più adatto a micro modelli (per volo indoor), che a modelli sperimentali di una certa complessità e costo, dove è importantissima l'affidabilità del SW e del collegamento radio (sia esso bidirezionale o meno).

Non oso pensare a come si possa sentire un qualunque aeromodellista che vede sfracellarsi al suolo più di 2000 Euro di un suo 'oggetto volante', per colpa di un bug nel SW o di una o più perdite casuali del collegamento radio


Ciao!
Paolo

[John Doe]

Originalmente inviato da LONGFLYER

[...] Why a new JR 2.4GHz in FHSS? Because, in many countries, as well as in Italy only FHSS link has free use ...

One thing that you might not know is that Spektrum’s DSM/DSM2 technology satisfies each of the requirements of FHSS modulation as specified in EN 300-328:

1) [ http://support.horizonhobby.de/getat...9yeSBGQVEucGRm ]

«Spektrum’s DSM technology satisfies each of the requirements of FHSS modulation as specified in EN 300-328 v.1.7.1. As the closing sentence of that clause states, “Systems that meet the above constraints shall be tested according to the requirements for FHSS modulation.” Therefore, DSM is subject to the maximum power level of 100mW as detailed in clause 4.3.1.2, and not subject to the limit of non-FHSS systems of 10mW as specified in section 4.3.2.2. Conformity tests as well as on-going production tests confirm that EU versions of DSM products meet the 100mW requirement. DSM then combines the coding advantages of traditional DSSS systems within the modulation requirements for FHSS to yield a secure, robust, full range radio control system.»

2) [ Service Portal :: Informationen zur Zulassung und Konformität des Spektrum Systems in Deutschland und Europa ]

ETSI EN 300-328 V1.7.1 (2006-10)
Spektrum Conformity EN 300-328
Elliott Labs Test Certificate

3) [ http://www.spektrumrc.com/ProdInfo/F...800-Manual.pdf ]

Declaration of Conformity
(in accordance with ISO/IEC 17050-1)

No. HH2010080203

Product(s): Spektrum DX8 Transmitter
Item Number(s): SPM8800EU, SPM88001FR

Equipment class: 2

The object of declaration described above is in conformity with the requirements of the specifications listed below, following the provisions of the European R&TTE directive 1999/5/EC:

EN 60950 Safety
EN 300 328 Technical requirements for Radio equipment
EN 301 489 General EMC requirements for Radio equipment

Signed for and on behalf of:
Horizon Hobby, Inc.
Champaign, IL USA
Aug 02, 201

Steven A. Hall
Vice President
International Operations and Risk Management
Horizon Hobby, Inc.