Multiprotocol Module Frequency Tuning

Support my work / pawelspychalski
Do you know that when you get a new radio transmitter with a Multiprotocol Module (Jumper T16, Jumper T18, Radiomaster TX16S, you name it), and you want to use it with, for example, FrSky receivers like R-XSR, you should perform a calibration? I bet you had no idea about that! Yes, the multiprotocol module calibration, also known as a fine frequency tuning is something that everybody should do, but I bet nobody really does. Too bad, since it's a simple procedure that can increase a useful range of the radio.

[@user-ng2vk2gs2k]

Огромное спасибо! Ваша речь, настолько грамотна и структурированна, что даже гугл переводчик все хорошо перевел!

[@casper01]

Pawel, I love you and so do my drones.. i came here to learn something new today and again you have taught me something i had no clue about 😃😋

[@AdrianoCasemiro]

I may be late to the party, but I am committed to converting all my models to Crossfire in my new Radiomaster Tx16s. Great, informative video, as always.

[@CgitEinsteins]

this is something new to me, thank you so much

[@MCsCreations]

Fantastic, Pawel! Thanks a lot! 😊 Stay safe there with your family! 🖖😊

[@Fagu01]

Nice explanation 👍 Thanks Paweł!

[@napfpv6239]

We had the case, that the MPM was so far off, that even binding was not possible. Binding was successful at +60 and ideal tuning was at over 100. So I always recommend doing this process. nice video.

[@Stashmanfpv]

You are the brilliant, on so many levels! ✌🏼

[@keithdrones1743]

Thank you AGAIN for great useful info 🙏👍😃

[@MrVasmikey]

Great info ! Thx!

[@enriquekramer4590]

Brilliant! Thanks.

[@hmc2797]

덕분에 잘선택하여 잘사용하고 있습니다/^^

[@RCFunTime]

thanks dude.

[@crfadv]

Thanks!

[@brunofporto]

There is some difference when you go until loose connection. And when you are from out of connection to when you aquire again the link. I do prefer the second alternative. Also I repeat the test several times and take note of several values. It is not always the same for some margin. Then I use averbado of the lower and upper average :)

[@mikaelbackstrom]

Already on, do not want to miss BotGrinder content. :)

[@surfek]

Great video. I did this for xsrx and xm+ and had completely different results, so cannot reuse values from one receiver to other frsky but different model... Will test my other rxsr receivers to see if values can be reused for the same receiver type...

[@divadonroda5]

If you change the frequency tuning value it is best to re-bind the receiver(s).

[@nickvledder]

And why is that?

[@tremorflow3614]

Thank you for the video! I have a question using a TX16S with an FrSky XM+, I have "RSSI" working and showing on betaflight and my fpv goggles but it doesn't show a value on the TX16S?

[@weekiamboon5134]

I tried to tune my TX16s frequency, but could not find the RF freq fine-tune in the model set up. I'm using flysky and orange receiver. How do I fine-tune and set up? All the model I set up has no signal telemetry Please help..

[@springpilot]

Hello Powel! Great video! However when I tried this on my only 2.4 GHz receiver, an E-flite UMX Turbo Timber with DSM protocol, the RF fine-tune didn't show up. How come?

[@VincentFischer]

I find this hard to watch because of my OCD and the multimodule update recommended message flashing the whole time

[@DivisionRc]

dont really get this, is this needed for spektrum? Getting my tx16s max soon

[@joeg986]

Does this need to be done with spektrum receivers for fixed wing planes?

[@rcrotorfreak]

How do you tune frequency of receivers that doesn't send to radio rssi? Yet the box frequency is there to adjust? How you tune to that? Ty

[@NextLevelCode]

What about ExpressLRS? Do we need to tune those?

[@paulmillard1130]

Am I ok using my spectrum analyzer ?

[@aerialcombat]

Can this be done with deviation?

[@beboba2498]

I'd use weighted average like (iRSSI0*OFFSET0 + ... + iRSSIX*OFFSETX)/(iRSSI0+..+iRSSIX), where iRSSI=100-RSSI, and measure e.g. 20 values

[@erlandfpv]

How about Xm plus?

[@gprov590]

Thank you so much for this. I thought you're joshua bardwell haha.. Sorry can't help it

[@FPVUniversity]

No, I'm not ;)

[@RETROGAME-FIX]

I dont see that option when selecting flysky AFHD2A receivers.

[@BrandonBeans]

Since SPI based frsky receivers fine-tune automatically upon bind (or so I've heard) would it make sense to rebind after the Tx fine-tune process? Edit: I'm specifically referring to the frsky_spi_offset parameter. Is it maybe best to just have one module "fine-tune" to the other, and just leave it at that? Meaning, it may be better for SPI based frsky modules, on firmwares using the spi_rx framework from betaflight, to not do perform the fine-tune process on the TX. I'd love to get some feedback from others on this. Edit2: My own experiment shows that rebinding after performing Tx fine-tune process brought the frsky_spi_offset value from -18 to -12. These results are repeatable with a margin of about 1-2 units for me. So is it better to de-tune just one module, or is it more ideal to "meet-in-the-middle" with both Rx and Tx? Edit3: I'm finding that if you fine tune with an SPI based RX, it's best to reset any offset in the firmware to 0.

[@keinplan147]

For my spi based quad I did a fine tune since it failsafed very reliable at the same spot in my garden. The tune was quite off from the default (-29) but I had no more failsafes since. So if they do a fine tune it’s either not good or I made a mistake while binding using the betaflight cli.

[@BrandonBeans]

@@keinplan147 it's automatic. It saves during bind process as a parameter called frsky_spi_offset, you can check in cli: get frsky_spi_offset. Yours is probably a fairly large, negative number. You noticed improved range and you didn't re-bind?

[@keinplan147]

Brandon's Baked Beans yes the range improved without rebind. I didn’t do a range check after that, but now I am able to fly around the garden without failsafes. Thank you for the information, I checked the spi offset and it was at -46. After rebinding without changing the frequency fine tune it has gone down to -37, shouldn’t the offset be closer to 0 if the Transmitter fine tune is correct?

[@BrandonBeans]

@@keinplan147 I would think it would be closer to 0. But I honestly don't know, so I'm fielding results from others. Perhaps you can go back and forth, fine-tune on Tx, then re-bind on Rx. Wash, rinse, repeat. Bad idea?

[@keinplan147]

Brandon's Baked Beans that’s exactly what I did Last evening: when upping the transmitter tune (so going from negative closer to 0) the receiver offset gets smaller. The lowest number I got was -3 with a fine tune of +18. upping the fine tune on the transmitter further the receiver would not bind any more, so an offset of 0 is not achievable for me. So it seems the spi offset is somewhat different to the fine tune. The quad is my only frsky receiver, I will receive an r-xsr in the next weeks and will do the fine tune with this receiver and try the value on the spi receiver.

[@chriswhitehead6095]

Mine also worked out at -14

[@fpvkabo]

Frequency fine tune value is only for frsky, flysky has no such tune value.

[@MrFergeson]

Do I have to do this procedure for DSM2 Spektrum receivers?

[@FPVUniversity]

No

[@meulaso3660]

EdgeTX dont have this option... : (

[@plaurence11]

My RadioMaster software does not show RF free fine tune. Any suggestions?

[@EricLaermans]

Upgrade the RadioMaster and, foremost, upgrade the firmware of the External Module. (At least, this is what worked for my Jumper t16.)

[@EnglishTurbines]

What if your RX has no Telemetry, like the popular XM plus....?

[@transitionfpv6707]

Yes same

[@SkyBandit45]

There's no freq tune on my tlite, when using my spectrum umx planes,and they keep losing signal how can I do this.

[@EricLaermans]

Upgrade both opentx as well as firmware on your external module!

[@cmtetaboaco]

Starts in 5:00

[@Revelation1177]

Hi I'm having an issue with my x9 lite an xm pluse when I'm 2 close it loses connection will this fix the issue?

[@FPVUniversity]

This is expected. And no, probably it will never be fixed

[@Revelation1177]

@@FPVUniversity is there a way to fix it

[@FPVUniversity]

No

[@andytheman72]

Don't have that option in EdgeTX, why? Yes, i had it in OpenTX.

[@FPVUniversity]

Hard to tell. Maybe EdgeTX removed this function

[@cosminjuverdeanu3671]

Don't judge me for this ... I can see things difrent some times. This is a power level based adjust ... nothing else nothing more. I will not work with afhd or other multi frequency receivers/transmiter . Antena calibration is something else ... IT should be same as software side of the transmiter/receiver. Power based adjust is more dependent in things that are around You (house, walls, trees, etc)

[@Rantanplan-0815]

Hi, Is this even possible now in ethos?

[@FPVUniversity]

No, Ethos does not provide it . After all, Ethos is not FrSky products

[@Rantanplan-0815]

@@FPVUniversity ah,jes,this "tuning" was only forb"non frsky" products"🤦...i know...sorry

[@BBFPV]

That was the fist i have done with my TX16S, but the range was exactly the same so i skipped this.

[@zigmar7]

This sounds a bit suspicious, is this technic is actually effective? Doesn't it assume that things behave nicely linear and falloff curve is symmetrical? Aren't things in radio world rarely respond linearly?

[@svenja6776]

It might not be perfect, but it might be better, even good enough for most. More research is needed ;)

[@JAKOB1977]

LOL 7:53 don't rain on my video parade by suddenly getting reception again at setting 51 and going down in the 40s I did not see it and I don't wanna relate to it, I just move on.

[@fellpower]

Sorry Pawel, but this Tutorial is muuuuch to long (for advertising)...talked to much for that short info..:(