Search found 237 matches

by G4EML
Tue May 11, 2021 4:19 pm
Forum: Baofeng DM-1801 specific
Topic: Dual Watch in latest version openDM1801 2021.04.03
Replies: 8
Views: 257

Re: Dual Watch in latest version openDM1801 2021.04.03

I have confirmed the problem with Dual Watch is due to the introduction of adjustable Scan Dwell times. The Dual Watch code sets a fixed dwell time of 135 ms for the first pass but on subsequent passes it tries to use the adjustable Dwell time, however this doesn't appear to be initialised correctly...
by G4EML
Tue May 11, 2021 9:38 am
Forum: Baofeng DM-1801 specific
Topic: Dual Watch in latest version openDM1801 2021.04.03
Replies: 8
Views: 257

Re: Dual Watch in latest version openDM1801 2021.04.03

Another change was the addition of adjustable scan dwell time. It might be worth increasing the dwell setting to see if that has an effect.
by G4EML
Mon May 10, 2021 9:53 pm
Forum: General discussions
Topic: can't hear most transmissions. why?
Replies: 11
Views: 282

Re: can't hear most transmissions. why?

With that setting turned on the radio hears all private calls, including those not addressed to your radio. I have just checked this by making a private call between two other radios whilst listening with an OpenGD77 radio. The OpenGD77 radio received both sides of the call. I am not sure that this ...
by G4EML
Mon May 10, 2021 7:11 pm
Forum: General discussions
Topic: can't hear most transmissions. why?
Replies: 11
Views: 282

Re: can't hear most transmissions. why?

Not sure about your comment regarding private calls. OpenGD77 can already receive private calls. Just set 'Allow PC' to 'On' in the Options Menu.

Colin G4EML
by G4EML
Mon May 10, 2021 10:45 am
Forum: General discussions
Topic: can't hear most transmissions. why?
Replies: 11
Views: 282

Re: can't hear most transmissions. why?

Yes, the OpenGD77 firmware allows the filters for talkgroup, timeslot and colour code to be individually turned on and off. With all filters turned off you will hear all voice traffic on a frequency. This is only true for amateur radio systems, some commercial systems use voice encryption which cann...
by G4EML
Wed May 05, 2021 9:21 pm
Forum: General discussions
Topic: can't hear most transmissions. why?
Replies: 11
Views: 282

Re: can't hear most transmissions. why?

It is a long time since I used the original firmware, but I am pretty sure the monitor mode was only for the selected timeslot.

So there may be activity on the other timeslot. Or you maybe seeing text messaging or Repeater Beacon traffic which will remain silent.
by G4EML
Sun May 02, 2021 9:16 am
Forum: New members post here first
Topic: From France
Replies: 1
Views: 71

Re: From France

OpenGD77 does not support text messages. So this firmware is probably not for you. Stay with the original firmware.
by G4EML
Sat Apr 24, 2021 9:14 pm
Forum: General discussions
Topic: whoosh sound at ends of DMR transmissions
Replies: 10
Views: 543

Re: whoosh sound at ends of DMR transmissions

The noises with CC Filtering off are present on all radios as far as I know. They may be more noticeable on some than others, and it may also depend on the local RF noise levels. The problem with the audio amp when the battery is fully charged is a hardware problem. See Jason's web page for a fix. h...
by G4EML
Sat Apr 24, 2021 9:21 am
Forum: General discussions
Topic: whoosh sound at ends of DMR transmissions
Replies: 10
Views: 543

Re: whoosh sound at ends of DMR transmissions

The HR-C6000 DMR chip and the firmware normally check the CC to ensure that the received signal is valid. This check is built into the hardware. I managed to find a way of disabling it to allow the CC filtering to be turned off. This is using the chip in a way that was not intended by its manufactur...
by G4EML
Wed Apr 07, 2021 7:22 pm
Forum: Hotspot mode
Topic: Options for duplex operation with GD77?
Replies: 1
Views: 501

Re: Options for duplex operation with GD77?

The question has been asked before and unfortunately the answer is no to both options.

Colin G4EML.