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Old Jun 30, 2012, 01:22 AM
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Romania, Dolj, Craiova
Joined Sep 2007
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Let RSSI as is for start.
For flying visually you should get no beeps, any beep shows an antennas (placement) issue.
For FPV, if you get beeps under 2km, again I would investigate antennas. With good stock antennas first beeps should occur at 2.5-3km.
Only when you reached this threshold you should think lower RSSI.
From factory they are set at 45-42-40dB, start decrease them by 3dB maximim, fly, and if you feel the need to push the margin more...
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Old Jun 30, 2012, 05:06 AM
Registered User
Romania, Dolj, Craiova
Joined Sep 2007
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Quote:
Originally Posted by scott page View Post
Nicely done. I'd like to see you put that into a blog post for easier location and reference in the future. I'm afraid that nugget of wealth will be lost among all of the posts here.
Added to Migrations section of links index in first post.
This is the second 6ex migration, the first is hack module based, and have its own thread, lots of technical details
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Old Jun 30, 2012, 08:53 AM
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Joined Sep 2010
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Quote:
Originally Posted by RENATOA View Post
Let RSSI as is for start.
For flying visually you should get no beeps, any beep shows an antennas (placement) issue.
For FPV, if you get beeps under 2km, again I would investigate antennas. With good stock antennas first beeps should occur at 2.5-3km.
Only when you reached this threshold you should think lower RSSI.
From factory they are set at 45-42-40dB, start decrease them by 3dB maximim, fly, and if you feel the need to push the margin more...
I am a bit confused.
Is it on screen 10 as in the photos that I set it?
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Old Jun 30, 2012, 06:29 PM
Flying a Chipmunk in Portugal
jhsa's Avatar
NRW, Germany
Joined Sep 2010
3,289 Posts
Just a little report on my servo jitter problem..
Moved both anttenas outside the plane and problem solved.. no more jitter on the aileron servos. didn't have any glitch also..
I have the DHT module and today I was flying and trying to look at the RSSI on the radio screen. When the plane was to my left side (tip of the antenna pointing at the plane), and about 150 to 200 metres away, sometimes I saw the RSSI go down as far as 48. Is that normal?

also a friend's quad suddenly lost control.. he found out that the antenna coax cable came out of the ??U-FL?? connector in the module.
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Last edited by jhsa; Jun 30, 2012 at 06:39 PM.
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Old Jul 01, 2012, 12:51 AM
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Romania, Dolj, Craiova
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Quote:
Originally Posted by jhsa View Post
...
I have the DHT module and today I was flying and trying to look at the RSSI on the radio screen. When the plane was to my left side (tip of the antenna pointing at the plane), and about 150 to 200 metres away, sometimes I saw the RSSI go down as far as 48. Is that normal?

also a friend's quad suddenly lost control.. he found out that the antenna coax cable came out of the ??U-FL?? connector in the module.
1) this is in all RC manuals, the position to avoid !

2) Yes, when antenna point to the plane, it's a black hole of signal.

3) seems this check must be added to preflight checklist, for Chinese gear
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Old Jul 01, 2012, 01:14 AM
You can't take the sky from me
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United States, WA, Richland
Joined May 2009
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Quote:
Originally Posted by RENATOA View Post
2) Yes, when antenna point to the plane, it's a black hole of signal.
This signal hole is much more serious -- or has a great magnitude with a 5db antenna than the stock 2db antenna.

Knowing this is also a way to find a lost model. Point the antenna out away from the transmitter and move back and forth in a sweeping motion. When the RSSI drops a bit -- it's pointing at the model (more or less). Keep checking as you proceed and you'll walk right to the model.
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Old Jul 01, 2012, 03:38 AM
Flying a Chipmunk in Portugal
jhsa's Avatar
NRW, Germany
Joined Sep 2010
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Quote:
Originally Posted by RENATOA View Post
1) this is in all RC manuals, the position to avoid !

2) Yes, when antenna point to the plane, it's a black hole of signal.

3) seems this check must be added to preflight checklist, for Chinese gear
Yes, i know about the holes
That was a test I was doing to check the RSSI. I just asked if it was normal reading 48.
And when I do a range test, I always check how far I can go also with the antenna pointed at the plane..
Sorry but I don't trust the frsky tx antennas, even less after yesterday. see my post above.. that cable should be well crimped and not come out of the connector like that..
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Old Jul 01, 2012, 03:43 PM
Bleriot's R Us
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Ireland, Donegal
Joined Nov 2003
1,003 Posts
I would agree on the antennas, I broke the swivel on mine and fitted the one that came with my DHT-U and have had occasional unexplained beeps, replaced it recently with a new one and had 5 flights today an never heard a peep!
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Old Jul 01, 2012, 10:43 PM
You can't take the sky from me
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United States, WA, Richland
Joined May 2009
5,892 Posts
Quote:
Originally Posted by jhsa View Post
Yes, i know about the holes
That was a test I was doing to check the RSSI. I just asked if it was normal reading 48.
And when I do a range test, I always check how far I can go also with the antenna pointed at the plane..
Sorry but I don't trust the frsky tx antennas, even less after yesterday. see my post above.. that cable should be well crimped and not come out of the connector like that..
I consider (completely subjective) 48 to be near my threshold for an alarm. I think mine are @ 40.

May I ask if you had a 2db antenna or 5db antenna?
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Old Jul 02, 2012, 06:44 AM
Bleriot's R Us
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Ireland, Donegal
Joined Nov 2003
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I bought a 5db one to see if it would help extend the range of my house wifi but made no difference, no matter which way I orientated it
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Old Jul 02, 2012, 08:03 AM
Flying a Chipmunk in Portugal
jhsa's Avatar
NRW, Germany
Joined Sep 2010
3,289 Posts
Quote:
Originally Posted by scott page View Post
I consider (completely subjective) 48 to be near my threshold for an alarm. I think mine are @ 40.

May I ask if you had a 2db antenna or 5db antenna?
Hi Scott, I have the original 2db antenna..
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Old Jul 02, 2012, 08:05 AM
Flying a Chipmunk in Portugal
jhsa's Avatar
NRW, Germany
Joined Sep 2010
3,289 Posts
Quote:
Originally Posted by xairflyer View Post
I would agree on the antennas, I broke the swivel on mine and fitted the one that came with my DHT-U and have had occasional unexplained beeps, replaced it recently with a new one and had 5 flights today an never heard a peep!
Did you replace it with a new frsky antenna, or with a different brand?
If another, could we please have the link?
Thanks a lot..

Joćo
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Old Jul 02, 2012, 08:09 AM
Be an organ donor
Little Rock, AR. U.S.A via U.K
Joined May 2004
1,109 Posts
Well Cr#p!! I finally decided to enter in to the 2.4 realm a couple of months ago and purchased the frsky module for my Futaba 9C Super, plus a couple of recievers (a 6 and 8ch). Finally, yesterday I put the 6ch in to my E-Flite T34 and all appears to have gone well. I deided to check what's been going on here, and is see there are some issues I had not seen before. Oh well, another day in paradise.
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Old Jul 02, 2012, 08:15 AM
f5b-uk
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United Kingdom, Dorset
Joined May 2002
3,064 Posts
Quote:
Originally Posted by kwmtrubrit View Post
Well Cr#p!!
I wouldn't worry about it. All brands have issues and at least you can read here what to expect. Most of us are using FrSky with 100% reliability and no modifications or fixes.

Mike
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Old Jul 02, 2012, 09:09 AM
Bleriot's R Us
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Ireland, Donegal
Joined Nov 2003
1,003 Posts
Quote:
Originally Posted by jhsa View Post
Did you replace it with a new frsky antenna, or with a different brand?
If another, could we please have the link?
Thanks a lot..

Joćo
Had suspected the DJT module so I bought a new one and used the antenna of that. Still have to fly the model that was more prone to giving me beeps first before I can confirm totally cured.
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