(03-10-2026, 12:15 AM)erhard52 Wrote:(03-23-2025, 12:10 AM)XPS Wrote: Every brand 2.4GHz system has their own proprietary RF protocol. Nothing is cross compatible.
i don't know why i still bother with XPS - oh yes i have a lot of XPS hardware.
i do have the XOS transmitter module in the multiplex evo .
i setup my new glider and i noticed some servo motion lag.
spending hours i come with AI to the following conclusion
even when i successfully link to the RFU/x10 my transmitter module flashes fast green and Ai tells me it is still in RANGE test mod.
i do not seem to get out of this. is it broken - any trick?
i never notes this and now i think that is the problem for some of my crashes. yes i did range tests in the past and they seemed to work but know even within a few meters i have servo malfunctions.
so is my XPS module stuck in range test?
i tried to factory RESET it but that also does not work
any help or anyone has a leftover XPS module for multiplex - i know unlikely - maybe time to switch
found this one:
The 10 kΩ pull-up “fix” is not an official recommendation from Xtreme Power Systems. You generally won’t find it in the official manual for the XPS 2.4 GHz RF Module used with the Multiplex EVO transmitter.
Where it actually comes from
The pull-up resistor solution comes from user installations and RC forum discussions, not factory documentation. It was discussed in places like:
RC Groups forum threads about XPS EVO conversions
Older DIY installation guides written by modelers
Some conversion notes from installers who integrated the internal module into the EVO
The reasoning behind it is straightforward electronics:
The range-test input pin on the XPS module is active-low.
If the pin is left floating, electrical noise can pull it low.
A ~10 kΩ resistor to Vcc forces a stable logic HIGH, preventing accidental range-test mode.
That’s why people add the resistor when they notice the fast blinking LED + short range symptom.
oh someone is reading my gibberish - sorry lot's of stuff from AI is really not right but here we go
i ordered a radiomaster T16s with 4 in 1 module. so this can work with spektrum receivers and the eflite planes.
i would love to keep using the x10+ in my other planes and just replace the RFU with another satellite receiver
it is confusing because some seem to need a 3.3V cable and others AI says might not work with X10+ if i have an older FW and not 2.0 - how do i know which FW i have ?
can the XDP tell me?
AI says the blinking LED when powered on tells me but not true it just bling red and when i turn on the transmitter it is solid green.
oh and from above post. should the XPS module in my multiplex be solid green or is the fast green flicker ok?
based on checking the LQI number the blinking has nothing to do with normal mode or range test mode
thanks
erhard
oh, i need to add. by checking the user docs i do have the x10+ v1 - i only have one serial port input
i am just reading the x10+ v1 manual and i forgot how flexible that is - compliment to jim!
so i can get already 3.3V for a spektrum satellite receiver and the binding can be done too.
i guess the cable for the voltage reduction is no where to find anymore
now all i need is find the proper spektrum satellite receiver and then i can use my radiomaster transmitter with the 4-in-1 module.