Currently I am using an XPS JR module in a RadioMaster Tx16s with 16+ nano receivers.  Before this I was using the Futaba module in my 9c radio.  I have used the RM setup for the last three seasons. Last season I crashed my funjet due to loose of control.  Unable to determine the cause I replaced the nano Rx and gyro and moved on.  I had no issues till about two weeks ago, I tried to fly my funjet on a hot ~85-degree day and during my preflight I noticed the servos movement was choppy and lagged the stick movement.  I had several flights before this on other models.  I assumed it was either the nano receiver or possibly the gyro in the plane.  I could not reproduce the issue on the bench, so again I replaced both the rx and gyro (installed another nano rx) and had no issues for several flights since.   

This past weekend I was out (again a hot 85 degree day) and tried to fly 71” Slick about mid day after 3 previous flights.  I experienced the same laggy choppy servo movements.  This time I immediately switched to the funjet and had the same issue making me think its an issue with the XPS module.  I wish I had then immediately switched to my small heli with a Spektrum rx (to rule out the radio) but this didn’t occur to me.  I later (same day) flew the heli for several flights and had no issue.  Both sessions were hot sunny days and I sometimes leave the radio on while changing packs.   Till I resolve this issue I don’t feel confident in using my XPS equipment.  Do these symptoms sound familiar?  Could this be a heat issue or just a failing module?  I see the JR modules are out of stock.  What are my options?  Thanks for any assistance.

Jim,

Firstly have updated my system to Win11. Am a Ubuntu user, so maintain Win dual boot for XPS stuff.
So I wanted to check a few Nano's. Maybe my memory is bad, but has any thing changed?  I can't get XDP to run as Owner.
The message "XDP/Telemetry station hardware not found" fronts up.
I re-installed XDP with the drivers. Seem to recall a similar problem from the past, but hey it was a long time ago.

Will you enlighten me 

Jim,

What is the safe voltage range for the XPS-J1 module?

The reason I am asking is because I have the XPS-J1 installed in a Taranis transmitter body.  Most of the models in that Taranis use the XJT-D16 protocol, but two of them are configured to send SBUS out (for DragonLink) through the external module bay into which the XPS-J1 is currently installed.  The Taranis indicates that the voltage for its SBUS output is at the battery voltage, around eight volts.

If I were to accidentally change to a model that uses SBUS while the XPS-J1 is still installed, would the SBUS signal and voltage levels damage the XPS-J1? 

Thank you,

Paul

Jim,

When I use the XDP to review the settings on my two XPS-J1 transmitter modules, I get this error message:

   

Note that the radio control function works perfectly, and I did not reset the module to defaults as the message says.

Is it just an "out of date" situation, or is there something really wrong and I need to reset to default and program again?

Thanks,

Paul

Jim,

I have an RFU working in conjunction with an X10+v2 that is currently bound to one of my transmitters.  This RFU and X10 setup works perfectly to operate the controls.

I wanted to bind the RFU to a different transmitter by following this procedure:

1. Power on the RFU by powering up the X10+v2 to which it is currently connected
2. Observe flashing red LED
3. Press the button until the LED turns solid green

With the button pressed, the RFU's LED just kept flashing red and never went into binding mode.  I tried several times, even holding it for as long as ten seconds - no change from flashing to green.

Could the push button have gone bad?

Note that that the RFU is currently configured with its failsafe OFF and is talking Xtreme Fast to the X10+v2. 

I tried again after disconnecting the RFU from the X10 and applied power directly using a 4.8v battery.  Same behavior - red flashing LED, but no change to green after pushing the button.

Please tell me if there is something I'm doing wrong, or if the RFU needs to be repaired.  Thank you,

Paul

Jim,

I ran out of Nano receivers but still have one classic original XPS 8 channel receiver with the single "mast" antenna.  I am contemplating using the 8 channel in an airplane.

   

1. Can you compare the range of the original 8 channel receiver with the Nano receiver?

2. What is the acceptable voltage (power) range for the 8 channel receiver? 

3. I upgraded from version 3.2 to version 3.9 using Updater 60.  Can you please provide the release notes for 3.9?

4. Does the 8 channel receiver have any serial capability to talk to an X10?

Thank you,

Paul

I am a long time customer of yours and I’ve been away from the hobby for a few years taking care of life stuff.  Then of course Covid and the great chip shortage happened.  You guys have been offline out of inventory for 2-3 years now?  I recently saw your web page that was there before your new relaunching soon page that is there now.  You said you bought a drone company or large application drone part producing company and with the supply chain shortage you decided not to produce RC equipment to feed the other business.  I guess that makes good business sense, but you kinda left us out to dry.   Additionally you will no longer honor your lifetime warranty you promised on the 8 and 10 channel receivers, of which I have 12 of and you can no longer repair them either?   

Why in the heck would I continue to buy your equipment when you are discontinuing some and not able to service your own products? Producing a limited line of products you can’t even keep in stock. Are you guys gonna be an RC receiver company or not?  You had that forum where you talked about some new fancy Transmitter you were going to be producing… WTH happened with that?   Why should I believe your web page that you are coming back in early 2024 with a whole new line of products now that I’m sitting on a pile of old non serviceable products?   I liked you radio systems a lot but how can you expect to grow your brand if you periodically disappear, shut off, or discontinue what you put out there?  Maybe you should just stick to what drives you, $$$$ and stop jerking us modelers around.

Jim,

I observed yesterday a new and different behavior when binding a Nano Rx to an XPS Futaba transmitter module in my Futaba 9C transmitter.

I configured the Nano for binding with its LED blinking fast.  Then I turned on the transmitter while holding the PROG button.  When I released the PROG button the bind did not occur.  At the time I had the transmitter located about two or three feet from the Nano Rx.  It finally completed the binding when I moved the transmitter antenna to within two inches of the Nano.

I have a second Futaba Tx module and I put it in the same transmitter body and repeated the test with the same Nano Rx.  The binding process completed immediately with the Nano even when the transmitter was several feet away.

After performing another "two-inch" bind with the suspect transmitter module, I performed a range test with the program button pressed for low power and went more than 150 feet away without any loss of control.

In my experience, XPS transmitter modules (both Futaba and JR) seemed to always successfully bind with XPS receivers when located several feet away.  This working distance is typical during bench testing and setup.

What I have now is a transmitter module that won't bind with a receiver until it is located two inches or closer.  This same transmitter module and receiver pair delivers good range in a range test.

I'm grounding the transmitter module, and in the meantime kindly want your opinion about it.

Thank you,

Paul

P.S.  Just opened the module and checked the u.FL connection - it was seated well on the internal RF module

Jim,

Wishing you and your family a new year 2024 full of love, humor and success.

Also looking forward to the new and interesting equipment XPS brings this year.

Paul

XPS,

When I bind a Nano Rx to an XPS transmitter module in my Taranis transmitter, does it care which "model" entry is active in the Taranis?

If I bind a receiver to airplane A, then bind the same receiver to airplane B, it is bound to airplane B, right?

So, I think that a model (say airplane A) can be bound to multiple receivers, but one receiver cannot be bound to multiple transmitters.

Is that correct?

thanks,

Paul