I bought several Radio Master receivers, R84 and R86 had no problems binding to my Taranis in D-8 mode however I can't figure out how to access the RSSI "Fine Tune" procedure of my TX as instructed in in the receivers data sheet? The output format of these receivers uses PWM signal format is that even compatible with my older (V-1) Taranis? I use a DJT module in the TX also.
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Taranis X9D and Radio Master receiver
- Thread starter Chappy
- Start date
Konrad
Very Strong User
It’s not there.(D8 in today’s RF environment)?
What did you find in the RadioMaster RX that you didn’t find in the Uni offerings at Aloft?
I’m curious as to why RadioMaster needs a manual tune? Are the components of such poor tolerance as to need it? Is this a price point quantity issue?
P.S.
I see the Archer is in stock
What did you find in the RadioMaster RX that you didn’t find in the Uni offerings at Aloft?
I’m curious as to why RadioMaster needs a manual tune? Are the components of such poor tolerance as to need it? Is this a price point quantity issue?
P.S.
I see the Archer is in stock
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FrSky uses close tolerance components and thus never needed to fine tune. You will not find a tuning ability in FrSky.
Does make me wonder if the "tune" feature is even legal with the FCC certification for our transmitters in the hobby. I have only seen this on clone radios that have cheated their way through the FCC certification process.
Does make me wonder if the "tune" feature is even legal with the FCC certification for our transmitters in the hobby. I have only seen this on clone radios that have cheated their way through the FCC certification process.
"Its not there" (?) Referring to my TX's ability to "fine tune" RSSI or PWM not compatible? or BOTH! Why RM over Uni - availability (east coast) convenience to include with a plane order mostly as well as being sold to work with Frsky. I haven't kept up with the advancements in the technology as I have always been satisfied with the performance of my X9D I purchased from Aloft back in '13 and the receivers have never failed me for my basic fixed wing aircraft needs. I considered upgrading the OPS at one point by returning it to Aloft but I was cautioned against it as it would not provide any substantial benefit considering what I use my TX for. As for the "why" RM needs a manual tune I can't answer. I would guess you are most likely correct - poor tolerance and $$.
I will have to consider the other receiver offerings as my luck in finding the older V8 / D mode receivers have all but disappeared.
I will have to consider the other receiver offerings as my luck in finding the older V8 / D mode receivers have all but disappeared.
Konrad
Very Strong User
If it is changing the RF part of the transmition one can't legally work on that part of the transmitter "tune" without a proper licence and equipment. That is part of the Type Certification.
Chappy - Nothing wrong with your X9D, you can keep them running a good long time. Good radios. I'd suggest buying the ACCST (D16) receivers though, you will enjoy improved performance and features over the now very old D8. If you have never updated the RF firmware and it is indeed an X9D and not the more common X9D+, then you will probably need to perform the RF update as FrSky did change the D16 firmware a long time ago. You will still be able to talk with your D8 stuff, so no worries there.
Konrad
Very Strong User
Not there as in the RF tuning function is not available nor legal with the any type certification TX. This has noting to do with RSSI, PWM or S-bus.
Your X9D with semi-current RF firmware can work with any of the receivers on this page:
alofthobbies.com
They are a huge leap forward from the D8 offerings.
FrSky Archer
FrSky Archer SeriesThe Archer Series feature FrSky's newest ACCESS protocol, so make sure your transmitter supports ACCESS or you will not be able to talk with the Archers. ACCESS brings several new features to FrSky radios. VFR telemetry reports packet loss data to better show the quality of...
alofthobbies.com
They are a huge leap forward from the D8 offerings.
Konrad: Perhaps I am not describing the function RM requires for their receivers to work with Frsky but appears to me to be the closest thing to a range check in that you have to determine the low and high signal strength, find the middle ground between the two and set the TX to enable them to work together. Like a fool we can sometimes be, I did not do a range check before launch. The RM RX bound without an issue and figured all was good. Moments after launch my TX began with "RSSI CRITICAL" and .. well. you guessed it .. airplane down!
Chappy sorry to hear that. Sadly not the first time I have heard this with RM products. Their quality control is next to nothing, whatever they can do to make the product cheaper.
With this said, it is always a good idea to perform and range test with any new radio gear. It is possible the antenna on the X9D is damaged also, good idea to give it a good visual inspection.
Hope this helps.
With this said, it is always a good idea to perform and range test with any new radio gear. It is possible the antenna on the X9D is damaged also, good idea to give it a good visual inspection.
Hope this helps.
Konrad
Very Strong User
My condolances at your loose.
RM does not require anything to work with FrSky. RM requiers that ALL & ANY TX be retuned to allow the RX to capture the RF signal. This is a RM issue not a FrSky issue.
A range check is not the same thing as pulling the TX RF around to match the poor alignment with the RX's RF tune. It looks to that because of the poor RX performance RadioMaster has allowed the TX to be illegally modified to try to allow the RX to capture the carrier signal. This is a band aid at best. It should only effect the range within a few percentage points. If you need to really move the TX RF an significant amount it is a strong indication that there is something else wrong with the RX RF or antennas.
P.S.
The Archer RX supports ACCST natively so no need for an external module. Just make sure both the RX and TX RF deck are running ACCST v2.1.xx.
Konrad
Very Strong User
The O.S. OpenTX is another issue that has a software solution.
OpenTX and RF firmware are 2 different animals. But it is suggested to update both of them. Just a warning, going to a newer version of OpenTX may kill your currently saved model memories.
Yes, your X9D can talk D8 and ACCST, it does not speak ACCESS. With this said, the Archer Plus receivers also also an option for you as they now support ACCST V2. So now you have even more options. (Just make sure it is an "Archer Plus", not the older "Archer")
Gets a bit confusing doesn't it?
Yes, your X9D can talk D8 and ACCST, it does not speak ACCESS. With this said, the Archer Plus receivers also also an option for you as they now support ACCST V2. So now you have even more options. (Just make sure it is an "Archer Plus", not the older "Archer")
Gets a bit confusing doesn't it?
Konrad
Very Strong User
MikeB
Very Strong User
1. I'm not sure why you are using a DJT module for D8 receivers, the X9D has an internal XJT module that supports D8 mode. The DJT is only needed for the very old 'V' receivers that are not V8-II.
2. FrSky modules and receivers use sufficiently accurate components that, when used together, no fine tuning is needed, so the XJT and DJT modules don't have any fine tuning capability.
3. It appears that RM don't use such accurate components, so the actual frequencies used for radio transmission and reception may be significantly off from the expected frequencies. This was first noticed when using the MPM Tx module (as shown in your video). The MPM code (nothing to do with RM, it is open source) was modified to allow for this fine tuning so the MPM would work reliably with FrSky (and some other) receivers. The MPM is actually being adjusted to use the correct frequency. If you use a FrSky (accurate) module with a RM receiver (that is off tune), then it is the receiver that would need to be "fine tuned". Unfortunately I don't think RM provide any way of doing this.
Basically, the open source community have made a "best effort" to cope with apparent poor hardware quality for a company that doesn't provide much in the way of software written by them.
4. The XJT is an ACCST Tx module that supports both D8 and D16 modes. Due to the detection of a very rare occurrence of a problem in the original (V1) D16 protocol FrSky brought out D16 V2. The new, Archer+ receivers do support D16, but only the V2 version. To use them you would need to update the XJT module to V2 firmware (it will still support D8 mode). Any receivers that you are currently using with D16 mode would also need to be updated (although it sounds like you are not using any!).
Mike
2. FrSky modules and receivers use sufficiently accurate components that, when used together, no fine tuning is needed, so the XJT and DJT modules don't have any fine tuning capability.
3. It appears that RM don't use such accurate components, so the actual frequencies used for radio transmission and reception may be significantly off from the expected frequencies. This was first noticed when using the MPM Tx module (as shown in your video). The MPM code (nothing to do with RM, it is open source) was modified to allow for this fine tuning so the MPM would work reliably with FrSky (and some other) receivers. The MPM is actually being adjusted to use the correct frequency. If you use a FrSky (accurate) module with a RM receiver (that is off tune), then it is the receiver that would need to be "fine tuned". Unfortunately I don't think RM provide any way of doing this.
Basically, the open source community have made a "best effort" to cope with apparent poor hardware quality for a company that doesn't provide much in the way of software written by them.
4. The XJT is an ACCST Tx module that supports both D8 and D16 modes. Due to the detection of a very rare occurrence of a problem in the original (V1) D16 protocol FrSky brought out D16 V2. The new, Archer+ receivers do support D16, but only the V2 version. To use them you would need to update the XJT module to V2 firmware (it will still support D8 mode). Any receivers that you are currently using with D16 mode would also need to be updated (although it sounds like you are not using any!).
Mike
