X8R receiver is not outputting channels 17-24 from external XHT module.

[tebby2]

I have recently installed an external XHT module in my Taranis X9E radio with the hopes of outputting channels 17-24 from my 3rd X8R receiver. After connecting the red/yellow/black/green pigtails to the correct pins in the external bay, I bound my 3rd receiver to the external module in D16 mode for channels 17-24. I bound the receiver to the external XHT module by deactivating the internal module and putting the XHT in active mode. The bind configuration offered the XJT with either D8 or D16. I chose D16 and set up the binding process for channels 17-24.

With both internal and external modules activated, I receive channels 1-16 from the internal module with two X8R receivers, but no outputs from the 3rd receiver that is bound to the XHT. Also, my Taranis X9E is displaying output bar functions for all channels 17-24.

Any suggestions how to correct this problem and produce outputs from the 3rd receiver.

 

[Wayne]

Baby steps first.

Have you seen any servo movement from the XHT at all? You can turn off the internal module if you like. But first make sure you have controls working via the XHT. I suspect you have an issue where the PWM is not making it into your module.

 

[tebby2]

Hi Wayne,
Yes, I had servo movement on all channels of the 3rd X8R with the XHT after binding with the external module and the internal module off. As soon as the internal module was made active, I lost all signal with the 3rd X8R. When I isolated the radio back to the external module, the 3rd X8R still had no signal. I re-bined the external and 3rd X8R again and went through the same process with the same result.

As another issue, after binding the 2nd X8R for channels 9-16 without telemetry, I had output control on all channels 9-16 until the 1st x8R was powered up. When the 1st X8R was powered up, I lost all the channels on the 2nd X8R. The only way for me to receive channels 9-16 is through SBus Decoders. I'm not sure why, but my X9E radio does not want to stay bound to three or two UNI X8R receivers at the same time for PWM pin output. Do you think I should try to use the 3rd X8R with SBus Decoders to output channels 17-24?

 

[MikeB]

If you run two XJT modules together (same as XJT and XHT), you need to disable the SPort telemetry from one of them. In your case this would be the XHT, you need to change both switches to be "up" (on), then rebind to the Rx.

I just ran a test using a X9D+, internal XJT and external XJT with both switches on. Three receivers running UNI (RX8R, X8R and X6R).
Bind RX8R to internal XJT, CH 1-8 telemetry.
Bind X8R to internal XJT, CH 9-16 no telemetry.
Bind X6R to external XJT, CH 1-8 no telemetry.

All three receivers work together, telemetry from the RX8R, and CH1 is on the RX8R, CH9 on the X8R and CH17 on the X6R, checked with a servo.

The Tx is running erskyTx (not openTx).

Mike

 

[tebby2]

Hi Mike,

I'm assuming that by placing the switches in the up (on) position you are referring the XHT module? It was my impression that the switches were in the down position for D16 mode. The manual indicates the switches in the up position places the module in the "Not Defined" mode. Is that what I need to do before binding the 3rd X8R?

I have bound the 2nd and 3rd receivers in D16 without telemetry. Is it necessary to give each receiver a different assignment number such as 01, 02 and 03 in the same model? When you bound the second receiver to the internal module, I assumed that you jumpered 1-2 and 3-4 for channels 9-16 without telemetry. Did you need to change the channel range numbers on the 2nd and 3rd receivers? This would equate to setting channel range to 17-34 before binding the XHT to the 3rd receiver?

 

[MikeB]

Yes, both switches ON for the XHT module. This sets D16 mode with the SPort signal disabled.
All receivers use the same RxNum value.
I didn't need to use any jumpers, when selecting BIND on the Tx, I have the options shown on the Tx to select before starting the bind operation. openTx should do this as well.
Internal module set to CH1-16, 2nd Rx set to use 9-16.
External module set to CH17-32, 3rd Rx set to use 1-8.

Mike

 

[tebby2]

Thanks Mike. I will try out your directions this afternoon. Hopefully I will have the good outcome that you had with your radio. I'll let you know how it goes.

Charlie

 

[tebby2]

Hi Mike,
The 3rd receiver now works great bound to the external XHT module with both dip switches in the up (on) position.

I am still having problems with the 2nd receiver. It works when the binding program is left in the 9-16 channel mode. When the mode is changed to 1-16 it reverts to the same signal output as the 1st receiver. When I put the radio back to 9-16 on the internal module, it works as it was bound. I'm wondering if it's important that the jumpers be used for the second receiver binding process to work together (with the 1st receiver) to provide channels 9-16.

Also, I found an online sketch of two X8R receivers tied together to operate from a single power source. It's somewhat surprising they are using the S-Bus port from the 2nd receiver to connect to the RSSI port from the 1st receiver. Have I been missing an important connection setup to operate both X8R receivers together to provide channels 1-16?

If I cannot operate both receivers together for channels 1-16, I can still operate the 1st receiver for channels 1-8 on the PWM pins and use two S-Bus decoders to provide channels 9-16.

Charlie

 

[tebby2]

Mike this is the online sketch

 

[MikeB]

In the diagram, the upper Rx is a RX8R, that has a SBUS in port, not a RSSI port.

Are you binding both receivers at the same time?
Bind the second receiver by itself with the bind options as 9-16 and no telemetry.
Bind the first receiver by itself with the bind options 1-8 and telemetry.
Set the internal module to output CH1-16, all should then work.

Mike