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RD-5R DMR Receiver Issue

Posted: Tue Jun 30, 2020 6:06 pm
by w9lw
Greetings. I loaded my RD-5R with OpenRD5R this week. I'm very impressed. My thanks to all developers for their work on this.

Subjectively, the radio seems to receive our local, high-profile DMR repeater not as well as it did with stock firmware. I hear dropped packets that I don't remember noticing before. I know the problem isn't with the signal, because the same transmissions sound fine when simultaneously listening with a different DMR radio.

I searched the forum and was unable to find any existing message threads that discuss a similar issue. If there is such a thread, please accept my apologies for creating a new thread and please point me to the existing thread.

I am unable to measure the frequency of a transmitted DMR signal, but when I transmit on FM with OpenRD5R, my portable frequency counter indicates a frequency that's within .0001 MHz of the selected frequency.

I welcome suggestions regarding why my radio seems to receive the DMR repeater more poorly with OpenRD5R than it did with stock firmware.

Thank you.

73 and stay well,

Jay, W9LW

Re: RD-5R DMR Receiver Issue

Posted: Tue Jun 30, 2020 10:24 pm
by VK3KYY
See the RD5R thread.

There is problems with newer RD5R radios not performing well which seems to be because of some new calibration parameters that are needed to be supported for these newer radios.

I presume Beofeng must have also changed the hardware aa little on these radios, perhaps cheaper lower quality components, and they are somehow correcting for this in their firmware.

Re: RD-5R DMR Receiver Issue

Posted: Wed Jul 01, 2020 2:01 am
by w9lw
Thanks, VK3KYY, I'll search for the thread you mentioned. My radio is not very new. I don't remember when I bought it but I think it was at least two years ago. Its serial number is RD5R*A0131.

Re: RD-5R DMR Receiver Issue

Posted: Wed Jul 01, 2020 2:11 am
by w9lw
VK3KYY:
I tried without success to find the thread you mentioned. Could you provide a link? A visual search was unsuccessful. i tried searching for the string "RD-5R" with the forum search tool but got the following response: "The following words in your search query were ignored because they are too common words: rd 5r." What's the secret to finding stuff in this forum? ;)

Re: RD-5R DMR Receiver Issue

Posted: Wed Jul 01, 2020 4:01 am
by VK3KYY
Look in the Quicklinks -> Active topics

viewtopic.php?f=13&t=827

There is a load of stuff in that thread about the problems with the RD-5R.

Basically you get what you pay for, and I don't have time to track down ever problem on every version of a $50 radio.

Re: RD-5R DMR Receiver Issue

Posted: Wed Jul 01, 2020 12:36 pm
by w9lw
VK3KYY wrote:
Wed Jul 01, 2020 4:01 am
viewtopic.php?f=13&t=827
Thanks for the helpful link. I'll read through that thread as time permits.