Stop transmitting occasionally...
Re: Stop transmitting occasionally...
Hello, do you still have this trouble? Or did you find a workaround?EB3AM wrote: ↑Wed Feb 12, 2020 9:35 pmHello, I have been seeing an error in the hotspot mode.
Occasionally, while streaming internet audio, it stops transmitting, although the Pi-star still indicates TX. When this broadcast ends and another begins, the radio transmits again.
By monitoring the same TG with a Hat, the transmission is still active.
I have a new DM-1801 for a hospot use and I have the exact same issue
Re: Stop transmitting occasionally...
I think I found what was wrong
When I built the USB cable, I sold the "-" and the shield wires together.
I also had some micro drops when receiving from the hotspot-TX (DM-1801) even with the lowest power (13 mW) and no matter the antenna used.
I have unsoldered the shield from the USB part of the cable and everything seems allright at the moment
When I built the USB cable, I sold the "-" and the shield wires together.
I also had some micro drops when receiving from the hotspot-TX (DM-1801) even with the lowest power (13 mW) and no matter the antenna used.
I have unsoldered the shield from the USB part of the cable and everything seems allright at the moment
Re: Stop transmitting occasionally...
F6GVE wrote: ↑Mon Jul 20, 2020 10:56 amI think I found what was wrong
When I built the USB cable, I sold the "-" and the shield wires together.
I also had some micro drops when receiving from the hotspot-TX (DM-1801) even with the lowest power (13 mW) and no matter the antenna used.
I have unsoldered the shield from the USB part of the cable and everything seems allright at the moment
I can't see how that would fix it unless you only soldered the shield at one end, hence you made a small antenna from the shield
Re: Stop transmitting occasionally...
Hi Luc,
Cheers.
---
Daniel
Yeah, D- is not the ground, D+ D- are differential pair.F6GVE wrote: ↑Mon Jul 20, 2020 10:56 amI think I found what was wrong
When I built the USB cable, I sold the "-" and the shield wires together.
I also had some micro drops when receiving from the hotspot-TX (DM-1801) even with the lowest power (13 mW) and no matter the antenna used.
I have unsoldered the shield from the USB part of the cable and everything seems allright at the moment
Cheers.
---
Daniel
Re: Stop transmitting occasionally...
Yikes
I presume he meant that he had soldered the shield to the -ve "Negative" connection.
data line "D-" is not ground !!!
I presume he meant that he had soldered the shield to the -ve "Negative" connection.
data line "D-" is not ground !!!
Re: Stop transmitting occasionally...
Anyway, shielding is overrated
Re: Stop transmitting occasionally...
Yes. In theory there should not be much pickup on a differential pair, even though the wires are not a twisted pair.
Its more likely there is general RF induction through the whole cable, which gets rectified somewhere in the RPi into DC which causes problems.