Frsky compatibility

I tried and i win 10 meters bitween 50 and 42 ..
this range seems to be a bit low no ?

Hi,

I saw in some topics that i could adjust the signal with freq-fine and freq-course.
what is the role of these two settings

Some people say they can reach about 800m with the cc2500 pa lna.

Thank for help

Increase freq-fine until the light on the receiver starts flickering slower/not smoothly anymore. Remember the value. Decrease freq-fine until it happens again. Then set it to a value in between the positive and negative values you got earlier.. i.e. if you get the flicker at +40 and -20, set it to +20.

Thank you Arakon, i got +23 and -36, if i understand good, the value is -5 !

i didn"t get more range with -5 instead the 0 stock value, right ?

And what about the freq course ?
I have the not flickering green led between -36 to +89

-13 actually. Coarse shouldn't usually be needed, but you can experiment with that in the same way.

Arakon wrote: -13 actually. Coarse shouldn't usually be needed, but you can experiment with that in the same way.

Thank you very much for your help.

Just want to know if with the multi-module 1.3 and the CC2500 PA LNA if i can expect a better range than now.

What should i do to increase it a little. 600 to 800 m would be great !

Arakon, you wrote that, so i have a problem with my setup, my cc2500 is not the good one ?

Thank for help

Who knows?
Such a rc setup consists of several parts, even a proper antenna setup.
.... on both sides.

Offtopic ON/

Just came across this guys developments; open source Firmware for Frsky Receivers, so f.i. you can upgrade and get S-Bus out of D4R Receiver. fishpepper.de/projects/
This is not the same as the project from Midelic, Arduino DIY Receivers....

aMax wrote: Who knows?
Such a rc setup consists of several parts, even a proper antenna setup.
.... on both sides.

This evening, i just try 3 x 2.4 different antenna, and it's quite same result. i even tried with the big DEVO10 antenna, same results.
On my DR4-II i change both antenna with new ones, and nothing change.

What can you advice ?
Thank you.

Any photo available of your quad and the mounted receiver?

Edit:
I already posted this link , but I think, it is worth doing it a second time.
In the near-field it has no big influence of the connetion quality (reflection etc) but at longer distance it comes to the point.


Edit2:
Since you have a D4R-II, the best orientation for the antennas will be in parallel and upwards, maybe a little tilt backwards because of the angle your quad is flying at a certain speed.
Why? This receiver has two antennas, but one is for receiving and one for transmitting the telemetry.

aMax wrote: Any photo available of your quad and the mounted receiver?

Edit:
I already posted this link , but I think, it is worth doing it a second time.
In the near-field it has no big influence of the connetion quality (reflection etc) but at longer distance it comes to the point.

Edit2:
Since you have a D4R-II, the best orientation for the antennas will be in parallel and upwards, maybe a little tilt backwards because of the angle your quad is flying at a certain speed.
Why? This receiver has two antennas, but one is for receiving and one for transmitting the telemetry.

Very interresting, Thank you
But I hardly believe that the location of the antenna divided by 4 the scope of this rx, i think it's something else in conbination.
Here the mount

Seeing your white Devo10 ( high gain antenna) I have no idea at the moment what reason could be.....
I get 700m out of my cheap DIY rx with a single dipole mounted like this.

static.rcgroups.net/forums/attachments/5...7-1vlcsnap-00201.JPG

Edit:
The only difference could be in the RF module you are using, because Arakon and I have the blue one from BG and no finetune was necessary.
To watch his flight search Arakon on YT and " Flight to the castle" (one year ago)...... (Devo7e and D4R-II)

Ok, for the price, i can give a try -> this one right ?

Except the colour of the shield, mine seems to be the same one, here

Will make another test with the antenna outside the frame. thank you

Yes, the BG one is what we use and I hope the quality did not change.Your RF module is a bit different, solder pads for
a soldered antenna on the top right.
Although the description is a copy of the BG one, they are advertising it with 100mW output. but, +17dBm is only about 50mW, which is in the range of the original FrSky D8 modules. You can add 2dBm for a normal antenna, so you will
have +19dBm overall ( 79.4 mW).or in your case even more.

aMax wrote: Yes, the BG one is what we use and I hope the quality did not change.

I hope too, but with a recent sudden price drop from 10$ to 4$, there shoul be a reason.....

Same results with the antenna outside. got 200 to 250m
I just order the CC2500 from BG.

If you had placed the one on the top like you did with one straight at the back, I think it would have been fine.
Remember, both should have the same polarization as the antenna on the transmitter!

aMax wrote: You can add 2dBm for a normal antenna, so you will
have +19dBm overall ( 79.4 mW).or in your case even more.

I have already a 2db antenna, you say i can add a second antenna to solder on the CC2500 chip and let the cable in the TX ?

aMax wrote: Remember, both should have the same polarization as the antenna on the transmitter!

Usually i fly with my TX antenna curved, but if i understand, it is better to fly with the TX antenna straight ?

Another thing come in my mind, i bought my dr4-II last month. Normally it should have the 27ms firmware. I'm using the DR4-II in ppm mode with only 4 channel
Does that make something to the range ?

I'm so sad that the x protocol have ever dropouts, i have a XSR waiting to be mounted on my quad

Thank all for help

sfersystem wrote: I'm so sad that the x protocol have ever dropouts, i have a XSR waiting to be mounted on my quad

The FrskyX dropout issue is fixed in recent nightly builds. petsmith found the problem.