Jeti - Central Box, Assist, and 900MHz

[@mitjagger]

One million thanks Harry!!! You can not believe that your videos are helping me with Jeti world. Thanks, thanks, thanks!

[@RTD1947]

Harry, I was just getting ready to put a REX12 assist into a CARF Corsair running a CB400. THANK GOD for this video!!!! Thank you!!! VERY MUCH!!!!! Just did mine!!! Works perfectly!!!

[@btomas225]

You are a godsend! I can't imagine having to do some of these setups by myself and subsequently having to deal with unknown anomalies cropping up (especially during flight) due to my own ignorance regarding the setup. Thanks for explaining the way it should function in this configuration and the way it shouldn't. I'm sure you came to learn some of the pitfalls through frustration and experience.

[@65Slipkid]

Yet another truly informative video from Harry's workshop! You've saved me hours of hair pulling. Again. Thank you Harry!

[@michaeljakob2903]

Hello Harry, Thank you very much for all your great videos. With your help I was able to realise many programming wishes for my Jet 16 II that I would never have managed without your help. Thank you for all your efforts. Many greetings from Michael in Germany.

[@SoaringExperience]

11:17 Solving the not activating Failsafe - just a bookmark for me :) Thanks for the video

[@roymills415]

Great video thanks, Im on the fence with Jedi but the more I hear, the more I like it...

[@tottoshobby]

Hello Harry, and thanks a lot for all your informative videos ! They are Great ! One thing that I really wonder about. That is regarding updating firmware with USB all the CB/Receivers that we already have in the model / models with servo connections etc in place. Would like to hear what is the correct way to do this with any CB/Receivers. Thanks ! BR Totto

[@cotswoldpilot]

Jeti says disconnect servos, which is a massive nuisance and in some cases it is not practical. I guess that is because the receiver is powered through the computer's USB port which might be overloaded by current pulled by the servos, and in the older R series receivers the Ext port might be current limited too. I suspect it is less important with CBs as they need battery power to be updated. Many people just do it with the servos still connected, I have, but it is your choice whether to risk it or not!

[@tottoshobby]

@@cotswoldpilot Thanks a lot for your quick reply ! I have always removed the servo leads until now, but that is really a lot of work just to update new firmware. I understand that you do it with servos still connected. I will then just power up TX/RX usual way and update firmware with USB. Again, Many thanks for your reply ! Been a long time Jeti user......BR Totto

[@terrys.20]

Harry unbelievable helpful as always. What would the differences be between a CB220 and a CB320? I have a Valach 250 that will only run on the 320. The ignition has safety cut off if it senses inactivity and shuts down even while running on the 220. After a minute it shuts down. 320 no problems. Have looked Rx’s, Batts, failsafes, have tried without CB just an Rx,just about every parameter. Stumped

[@cotswoldpilot]

320 has voltage regulation

[@Ullf_M]

Hi, thanks for the good and instructive videos. Got curious about a number that appears in the Device Explorer menu, after CBO220 it says [2], what does that number mean? I saw your video for CB320 it said [1] there, probably nothing important but as I said I was curious

[@cotswoldpilot]

It is the number of the Ext port on the receiver to which the device is connected. If you count E ports as Ext ports, a REX receiver has 3 - 1xExt and 2xE.

[@Ullf_M]

@@cotswoldpilot Thank you so much, now I can sleep again :)

[@affas]

Hi Harry! Why are You using Rsat2 into E1 in the Rex 10 instead of directly into RX2 in the CB and then use 900 into E1 configured for receiver?

[@cotswoldpilot]

If you do it that way, and the Assist loses radio connection, the CB will switch to Rx2 which is the Rsat. That has no stabilisation from a gyro. If you connect the Rsat through the Assist, then when the Assist loses radio connection it takes data from the Rsat and stabilises it then passes it to the CB, so you do not lose stabilisation.

[@affas]

@@cotswoldpilot Thanks! But if the Rex really goes down You might even loose Rsat2 and the only 900 available? By "my" setup I loose gyro but both Rsat2 and 900 will work as it should I guess? Thanks for replying!! :-)

[@cotswoldpilot]

@@affas you connect the rsat ppm output to cb rx2 so if the cable from assist fails you still get a ppm signal from the rsat to cb. Take a look at the diagrams on Jeti's website

[@chrislodge5808]

Hi, with the Assist receivers, does it matter how many channels it has with regard to stabilisation using X Bus? Makes sense to use a 6 channel rather than 12 if there is no difference for this particular application.

[@cotswoldpilot]

Makes no difference, the number on a receiver is just the number of servo sockets it has. They all receive and process 16/24 channels

[@affas]

Hi Harry, great video! I do like this setup and I wonder if I can use servo outputs on the Rex 10 for non essentials (lights, smoke, etc) if I do use external power to the REX 10. I was thinking of usimg same batteri into CB 220 with a split into battery port on the Rex 10. Thanks!!

[@cotswoldpilot]

You need to ask Jeti. Powering the Rex might cause problems for the current limited Rx ports on the CB, especially as the CB voltage is lower than battery voltage due to V loss across the CB power inputs due to the diode isolation

[@affas]

@@cotswoldpilot Thanks!

[@affas]

@@cotswoldpilot Hi again, answer from Jeti Support: yes, you can do it as you suggested. REX3/E1 to CB220/R1 (EX Bus) REX10/E1 to CB220/R2 (EX Bus) (with external power and remap servo outputs) The cable between REX10 and CB220 have to have only a minus and signal wires (plus remove). Rsat900/E1 to CB220/R3 (EX Bus)

[@leonmare7100]

Hi Harry, I've setup Double Path using 2x RSAT2's and a CB200. I selected under Display Telemetry to display the Antennas and on the home screen . I can see A1,2,3 and 4 antenna strengths - all =9. If I disable the primary Rx I get the signal lost message but ALL 4 of the antenna signals indicate zero - however I still have control of the model. In your demos your home screen indicates zero's for the disabled Rx, and 9's for the other. By the way the same happens when disabling the secondary - I still have control but all antenna values are 0. Any idea what I'm doing wrong ?...thanks in advance Harry...

[@cotswoldpilot]

In the CB200 settings, "Alarm at: loss of both receivers". Then only the disconnected rx goes to zero

[@leonmare7100]

@@cotswoldpilot Thanks a million - I'll try that....👌

[@leonmare7100]

@@cotswoldpilot It worked like a charm - many thanks Cotswoldpilot !

[@basilissaimon6297]

hello Harry would this be possible with an rsat2 instead of 900????

[@adambrezina8384]

I think you can use all, rex assist, rsat and rsat 900, as central box supports 3 communication modules, I think that he connected it that way to have assist supported with multiple antenas and then 900 as backup

[@DidierO]

Hello Harry, Thanks for your great video's. I already asked on the "Jeti forum" but still haven't got an answer. When you have connected the ASSIST on R1 of your CB, the diagram of the JETI website says "failsafe enabled". I think this is wrong because you want the CB to control failsafe in the first place. So the settings must be in my point of view of the ASSIST connected to the CB: "Failsafe disabled" and "Failsafe type: off". Do you agree?

[@cotswoldpilot]

I agree with you Didier. If the Assist failsafe is enabled it will always send a signal to the CB, so the CB can never switch to the backup RSat or 900Mhz.

[@DidierO]

@@cotswoldpilot Great, thanks Harry

[@cerosas]

Hi. I’m having a problem. I’m using all channels in my CB210 and I need 4 more. I put these 4 (gear doors) connect at REX 7A. When I Enable EXBus on REX it’s override the CB Channels. Can you help me?

[@cotswoldpilot]

I don't understand what you are saying. If the rex7a is connected to the cb then it should already be in exbus

[@cerosas]

​@@cotswoldpilot Let me try to clarify. All connections are the same as the video. I have servos connected to all CB 210 Ports and four more door servos conneted to REX 7A ports. The problem occur when I enable the "Stabilise EX Bus output" at REX 7A. When I do that, the configuration of servos connected to the same output number at REX7A and CB, are overwritten and these servos at CB 210 stop working. Everything is already in exbus. Thank you in advance.

[@cotswoldpilot]

@@cerosas not a problem I have seen and I don't have a spare receiver to test it with, you need to go back to your retailer or jeti.

[@richbran10]

CB310, if I use a REX6(assist), put in R1 of the 310, I can use the RSAT2 directly into R2 of the 310, is that OK? (no need at the time for an extra slot for a 900.)

[@cotswoldpilot]

@@richbran10 yes but if it switches to R2 you lose stabilisation. Better to exbus the rsat to the Assist, and PPM the rsat to CB R2. Better still to use a Rex3 then you can exbus it to the Assist and Exbus it to the CB R2. PPM is better than nothing but introduces new problems which must be solved

[@richbran10]

Tks cwpilot, it worked, I overheard in the vid the 5/E1 needed EX bus input/output, had only EX bus chosen. Now servo's work as does the assist, only strange is that checking the signal in the telemetry display, whenever I stop transmissons in either receiver (or pull out RSAT2 from the REX6), the servo's keep working but the antenna display looses all 4 antennae displays. I have a REX3 available here, I can try that one as well and plug it directly in R2. Richard

[@richbran10]

sorry, plug it into the REX6 with EX bus both sides and the whole lot into R2, that's what You mean I guess, leaving the R1 unused?

[@cotswoldpilot]

​@richbran10 in the wireless menu, change "Alarm at" to "loss of both receivers" and then the A and Q value will still be displayed for the receiver that is still working

[@cotswoldpilot]

​@@richbran10 No. Rsat/rex3 into Assist, Assist into CB Rx1. Rsat/rex3 also into CB Rx2.

[@ThatGuySince87]

What is the benefit of running one 2.4 and one 900mhz vs two 2.4 RXs?

[@cotswoldpilot]

Multiple 2.4 Rx is to give you more aerials to overcome signal blocking between Tx and Rx aerial due to conductive materials such as carbon fibre, metal coverings, etc. 900MHz is a backup in case the 2.4G band is so noisy that it overwhelms your signal.

[@leex70xeel]

Hello Harry, thanks for all clarification! Helps to understand what i already found out during my double path setup with a cb200, assist on rx1, sat on rx2 and 900 backup on rx3/ext1. I assume it does not really matter (transmissionwise) wheter the sat goes into the assist or rx2 on the cb200? My theory was, whan the assist really gets broken/fried, the sat will work via rx2 on the cb. My guess was when the assist really broke up it will not pass the signa of the sat😏. So i used all 3 ports on the cb200, and would like to know if i should change that into your displayed config. Thanks in advance! I know i will loose stabilisation when it will switch to rx2...(is that so?)

[@cotswoldpilot]

Leon, you can connect the sat to both the Assist, and Rx2 ! See diagram number 1 on the jeti website link. That is for an rsat, if using something like a REX3 as satellite set the second link to Exbus. www.jetimodel.com/en/REX-Assist/Connecting-the-REX-Assist-receiver-in-case-multiple-receivers-are-used/