Hi there,

Using:
Rapidfire on 5800 (I4) 25
TBS UNIFY PRO 5G8 HV :: 4/4/1 (red and blue steady light)

first of all I followed the common procedure.

Problem is i always fail to calibrate.


I want to add, that on my OSD the RSSI Value shows "0".

My VTX sends a picture. But it is not good. 
When I fly high the picture gets better. And then cuts off without a warning.

I tried different antennas. But that is not that important as I can't even calibrate.

I hope you can help guys!

cheers Michael

What’s the firmware version on the rapidfire module?

Can you try the calibration process in a another location? Might be some local interference.

Did you ever test the video before you ran calibration? I mean on factory calibration.

Hi there,

Brain: 1.3.2
RF: 1.1.4
Power 4.9 (no aux board) as HDO Goggle
Low Power: no

Location changed quite a lot. Even on a field with not even power lines.

Did the calibration quite early as i did the firmware at the beginning.

The whole a equipment sat in my shelf almost 2 years as i was lacking free time.

!!!! I was putting the RSSI VALUE in my osd. It is BLINKING Zero! Does that mean something?

Please help! I am desperate!

Thank you
michael

I don't own a RapidFIRE module so I'm not going to be able to help you with the calibration on that but it might be useful if you posted some photos of the antenna setup on your goggles and the quad.

As for flashing zero RSSI value in your OSD, that is related to the transmitter RC Link and will be because you haven't configured RSSI correctly. Please start a new thread for that issue so we aren't trying to answer questions on two unrelated issues in the same thread. In that new thread please tell us what transmitter and receiver you are using, and please also run both the "dump" and "diff all" commands in the Betaflight Configurator CLI tab and copy/paste the results into that new thread.

(04-Jul-2021, 09:08 AM)K-Mike Wrote: !!!! I was putting the RSSI VALUE in my osd. It is BLINKING Zero! Does that mean something?

Do you mean the RSSI bars on the RapidFire OSD or the Betaflight OSD?

Betaflight is unable to display RSSI for a VTX. The RSSI is only for your RC link not video link.

If you are unable to calibrate the RapidFire module then I will consider it a hardware issue. 

Are the two RapidFire module boards properly in contact with each other? Do you see any damage to the sma connectors?

Can you switch to Legacy (which is basically diversity mode) to check if you are still getting decent range?

Did you run the calibration without antennas? Did you have a vtx powered off for the first steps and then powered on for the second step of the calibration process?

(04-Jul-2021, 11:38 AM)kafie1980 Wrote: Do you mean the RSSI bars on the RapidFire OSD or the Betaflight OSD?
—> no, not the bars. Betaflight. Got it! Has no infuence!

Betaflight is unable to display RSSI for a VTX. The RSSI is only for your RC link not video link.
—> i thought it calibrates between the difference of RSSI and the RC somehow. I guess i need to do some more research! ?


If you are unable to calibrate the RapidFire module then I will consider it a hardware issue. 
—> same feeling here

Are the two RapidFire module boards properly in contact with each other? Do you see any damage to the sma connectors?
—> in the goggles is only one. Or what do you mean?

Can you switch to Legacy (which is basically diversity mode) to check if you are still getting decent range?
—> yes, tried all three. Nothing decent here.

Did you run the calibration without antennas? Did you have a vtx powered off for the first steps and then powered on for the second step of the calibration process?
—> yes, as we should step by step. 2. step 2m away with slight movement.

So through it out and jump directly to the DJI v2?

Yes, sir!
New thread!

Thanks

There is no calibration between VTX and RC link rssi.

The RapidFire module is made of two boards sandwiched and connected via pin headers. Each board has an SMA connector.

See this image:

https://www.buildyourowndrone.co.uk/medi...module.jpg

Ensures the both the RF boards are incontact and the sma connectors are not broken.

“So through it out and jump directly to the DJI v2?”

A replacement analog VRX module is much cheaper since you have an analog and googles.

DJI v2 has not been good experience for many. And the threat of the fpv system being discontinued has been a concern for those already invested. I will advise you to make an informed decision before you invest in DJI.

Well, thanks for all the input! I mean it!

I am sure having a hardware broblem. Maybe the VTX is fried? 

Any idea where to start an elimination process?
I only have that one VTX and that one Rapidfire module!

thanks in advance

(05-Jul-2021, 11:58 AM)K-Mike Wrote: Well, thanks for all the input! I mean it!

I am sure having a hardware broblem. Maybe the VTX is fried? 

Any idea where to start an elimination process?
I only have that one VTX and that one Rapidfire module!

thanks in advance

I would get a replacement VTX first and even the cheapest one you get will work for the RapidFire calibration.

(05-Jul-2021, 03:01 PM)kafie1980 Wrote: I would get a replacement VTX first and even the cheapest one you get will work for the RapidFire calibration.

Yepp, will do that! 

Thx

Well Well Well ...

As my 2nd VTX is on its way I tried tinkering a bit more.

The VTX suddenly works ... BUT.

I cannot use current the from the FC (14.2V). It only works with the second battery (16.4V). (pls consult the pictures)
The VTX turns ON with the FC but as stated above! Misserable!

Now please surpress the laughter ... can I hook the VTX directly to the flight battery? 

Or what could be the problem?

cheers
Michael

The TBS UNIFY HV supports vbat voltage upto 6s so you can connect it to direct lipo voltage.

Did you check using a multimeter if the VBAT pad on the FC was reading any voltage?

What FC is that? do you have any other VBAT pads?

Yes I did.
As stated im my last post, the pad in the picture comes with 14.2 V. It powers the VTX but I guess not enough!

I hooked it up with the second battery 16,4 V and it runs perfectly!

I was just wondering if the spikes during flight influence the Vtx negatively if i hook it up directly.

FC = Revolt OSD

(11-Jul-2021, 07:17 AM)K-Mike Wrote: Yes I did.
As stated im my last post, the pad in the picture comes with 14.2 V. It powers the VTX but I guess not enough!

I hooked it up with the second battery 16,4 V and it runs perfectly!

I was just wondering if the spikes during flight influence the Vtx negatively if i hook it up directly.

FC = Revolt OSD

The TBS Unify HV should be able to run off even 2S voltage. Why will it not run over 14.2V?

As long as you have a decent low ESR capacitor you should be ok in terms of voltage spikes.