Search found 228 matches

by G4EML
Wed Apr 07, 2021 7:22 pm
Forum: Hotspot mode
Topic: Options for duplex operation with GD77?
Replies: 1
Views: 125

Re: Options for duplex operation with GD77?

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

Colin G4EML.
by G4EML
Sun Apr 04, 2021 1:38 pm
Forum: General discussions
Topic: Another HAM-friendly scan feature: "Zone Link"
Replies: 5
Views: 156

Re: Another HAM-friendly scan feature: "Zone Link"

There is one other feature to scanning that you may have overlooked. Every channel has two ‘Flags’ included. These are called ‘Zone Skip’ and ‘All Skip’. These control which channels are scanned in the Zone and in the All channels Zone. Using these flags you can control exactly which channels are sc...
by G4EML
Sun Apr 04, 2021 9:43 am
Forum: General discussions
Topic: Scan priority
Replies: 4
Views: 80

Re: Scan priority

All the radios I have come across that implement priority scan work as Pavel described. They only have one or two priority channels and those are constantly checked at a preset interval. If the scan stops on a non-priority channel the audio is briefly interrupted every second or so while the priorit...
by G4EML
Wed Mar 31, 2021 9:35 am
Forum: General discussions
Topic: Scan speed versus sensitivity
Replies: 59
Views: 1695

Re: Scan speed versus sensitivity

Don’t forget that we have seen before that some radios had EEPROMs that were slow to write. We had to add the code to wait until the write was completed. Maybe speeding up the bus has caused the write to fail again.

Colin.
by G4EML
Tue Mar 30, 2021 3:15 pm
Forum: General discussions
Topic: GD77 FW for a mobile radio?
Replies: 8
Views: 356

Re: GD77 FW for a mobile radio?

I have two MD9600s and I used to love them. However after using OpenGD77 for some time I now really hate the user interface on the 9600s. Everything takes so many button presses!

Colin G4EML.
by G4EML
Tue Mar 30, 2021 11:57 am
Forum: General discussions
Topic: GD77 FW for a mobile radio?
Replies: 8
Views: 356

Re: GD77 FW for a mobile radio?

The OpenRTX project is interesting but not yet at a usable level, especially for the MD9600 which is the least developed. It is progressing slowly but there is still a massive amount of work needed. It will be interesting to see how it progresses.
by G4EML
Mon Mar 29, 2021 8:48 pm
Forum: General discussions
Topic: [Not possible] Is the GD77 hardware capable of analog cross band repeater function?
Replies: 5
Views: 199

Re: Is the GD77 hardware capable of analog cross band repeater function?

There is only one transceiver chip and it can’t transmit and receive at the same time so crossband repeat is impossible.
by G4EML
Mon Mar 29, 2021 7:23 pm
Forum: Bug reports
Topic: Low signal when breaking squelch
Replies: 13
Views: 631

Re: Low signal when breaking squelch

More people haven’t complained about this because it is not happening for them. Plenty of people are having analogue QSOs without any problem. Your radio appears to be behaving differently to others. That reply from Radioddity really does not say anything useful. In fact it contradicts itself. It fi...
by G4EML
Mon Mar 29, 2021 6:36 pm
Forum: General discussions
Topic: Where does a custom firmware project begin?
Replies: 10
Views: 297

Re: Where does a custom firmware project begin?

Pretty much correct. That is what has been done to produce the OpenGD77 firmware.
It is still a lot of work especially as the data available for some of the major chips is very limited or not available. The Chinese chip manufacturers often do not release publicly available datasheets.