Baofeng DM-5R and Radioddity GD-55 test results.

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Baofeng DM-5R and Radioddity GD-55 test results.

Postby m0lsx » Wed Jul 26, 2017 8:46 pm

Someone posted this on an amateur radio FB group.

http://www.rmham.org/wordpress/baofeng-dm-5r-test-results/
“Do these radios transmit a legitimate digital voice signal on timeslot 1?” Yes.

“Do these radios transmit a legitimate digital voice signal on timeslot 2?” The radio transmits a copy of the TS1 signal on TS2. It is not supposed to do this.

“When transmitting on one timeslot does the radio jam the other timeslot?” Yes.

“What does the jamming signal look like?” It is a duplicate of the intended signal.

“Are you sure you weren’t using the radio in Tier I mode?” DMR Tier I FDMA and Tier II TDMA are completely incompatible. If the radio were in Tier I it would not be able to activate DMR repeaters or work with other Tier II radios in digital simplex. These radios are able to do both of those things.


“What has their response been?” Baofeng and Radioddity have consistently stated that if you wanted a two-timeslot radio you should have purchased one.

“Have they addressed the issue of jamming?” Not that we have seen.

“Are there any other issues with these radios I should know about?” The Baofeng DM-5R frequently glitches while reading or writing memory channels, causing them to receive and transmit incorrect talkgroup parameters. The Radioddity GD-55 has a particularly confusing menu system which buries common actions several levels deep.


Tytera MD-380 on DMR Tier II Digital Simplex waveform
Image

Baofeng DM-5R DMR Tier II Digital Simplex waveform
Image


Digital radios hold no interest with me at all & the same with repeaters. I just though some here may be interested in the above.
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