RSSI signal low @ Tandem x20S

[JCRodz]

My brand new FrSky Tandem X20S is showing a low RSSI signal. Even close to the receiver is loosing the signal. Im using a new GRX8 and looks like binds ok.
I follow the process to register and bind and is communicating but the signal is too low. What im doing wrong??

 

[JCRodz]

Also , I flash the Radio with the latest firmware and also the receiver from FrSky web page.

 

[Konrad]

What FW and protocol?
Batteries fully charged?
Is this the RX you have?
Have you add adjusted the RSSI warnings per the read me file (32 & 35)?

G-RX8 - FrSky - Lets you set the limits

www.frsky-rc.com

 

[HENNY]

What FW and protocol?
Batteries fully charged?
Is this the RX you have?
Have you add adjusted the RSSI warnings per the read me file (32 & 35)?

G-RX8 - FrSky - Lets you set the limits

www.frsky-rc.com

The X20 automatically adjusts the RSSI level monitoring depending on ACCST, ACCESS selection. This receiver can still be swamped by close proximity to the transmitter, move a few meters away from the transmitter and see if the warning continues, better still perform a range check. The next thing to look at is the receiver antenna condition. RF module firmware is found on the FRsky web site. Ethos firmware is found here. https://github.com/FrSkyRC/ETHOS-Feedback-Community/releases The new Ethos suite makes updating your transmitter Ethos firmware very easy. Its practically an automatic process now.

 

[JCRodz]

The X20 automatically adjusts the RSSI level monitoring depending on ACCST, ACCESS selection. This receiver can still be swamped by close proximity to the transmitter, move a few meters away from the transmitter and see if the warning continues, better still perform a range check. The next thing to look at is the receiver antenna condition. RF module firmware is found on the FRsky web site. Ethos firmware is found here. https://github.com/FrSkyRC/ETHOS-Feedback-Community/releases The new Ethos suite makes updating your transmitter Ethos firmware very easy. Its practically an automatic process now.

Hi Konrad / Henny thanks for the response,
My Firmware is Ethos - X20S ; version 1.2.10, FLEX; the Internal Module is HW:1.4.0 FW: 2.2.1 (FLEX-915M)
the receiver is a GRX8.
SO, i just update the radio using ETHOS Suite, lot easier now.
But still doing the same problem.
Readings are: RSSI is at 39dB and VFR is at 70%
If I walk few steps away and turn my back to the receiver will loss connection with the receiver.
Wondering if the internal antenna is connected????

 

[HENNY]

Have you configured the X20S for internal antenna.

Yes Ethos 1.2.10 is the latest version.

I would try another receiver to confirm the TX is working normally.

I would expect the RSSI to be 39db at 50 meters. So something not normal.

Yes shielding the TX antenna by turning your back on the receiver will result in some of the TX antenna energy being blocked by your body, but this is normally quick some distance from the receiver.

further testing required to get to the bottom of your issue.

 

[JCRodz]

Henny, please can you define how to configure the x20s internal antenna ?
This radio is new for me and im learning this system now.
thanks
I will open the radio to inspect antenna connections and also will buy another RX to see if something is wrong with the G9RX.
Will report soon.

 

[HENNY]

Henny, please can you define how to configure the x20s internal antenna ?
This radio is new for me and im learning this system now.
thanks
I will open the radio to inspect antenna connections and also will buy another RX to see if something is wrong with the G9RX.
Will report soon.

Once you have selected the model type, short click on MDL, 8 menu selections appear on the screen, click on RF System, you will see the Antenna function between 2.4G and 900M , it should be on Internal. The radio defaults to internal unless you have somehow changed it. To use external Antenna you need to attach an external antenna to the ANT1 antenna socket on the rear of your radio. I would not open the radio Transmitter unless you know what you are doing. The best way to solve your issue is to bind to a second receiver and see if the problem continues. When you are performing a range check ensure the model is elevated about 1 meter above ground. Also mounting the receiver inside a model ensure the antennas are not near your battery or inside a carbon fiber fuselage. Antennas need to be well clear of metal and carbon objects and located either side of your model so they can truly operate in diversity radiation.