Search found 111 matches

by G8SEZ
Sat Jun 06, 2020 8:00 pm
Forum: Pi-Star General Support
Topic: ZumSpot Rebooting Occasionally on its own
Replies: 20
Views: 558

Re: ZumSpot Rebooting Occasionally on its own

This SIGTERM seems to happen approximately every 8 mins 10 seconds, can't think of anything that would run on that sort of schedule.
by G8SEZ
Sat Jun 06, 2020 7:09 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex MMDVM board not working correctly?
Replies: 50
Views: 502

Re: Duplex MMDVM board not working correctly?

It is a puzzling problem but I do know that the handheld will behave differently when the frequencies are different for Tx and Rx, so it's unavoidable that you are changing two things at once which makes things more confusing, I don't have equivalent hotspot hardware here to test with, but I have an...
by G8SEZ
Sat Jun 06, 2020 3:32 pm
Forum: DMR Specific Support
Topic: Newbie post: configuring DMR on ZUMSpot
Replies: 11
Views: 197

Re: Newbie post: configuring DMR on ZUMSpot

Thanks. I guess I'm in a chicken/egg situation here. I am not able to reach any DMR repeaters from my home QTH, so the only way I'll get on to DMR is through a hotspot. I know how DMR works, but have no way to prove the radio is set up properly if I can't get into the DMR network: which requires th...
by G8SEZ
Sat Jun 06, 2020 1:34 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex MMDVM board not working correctly?
Replies: 50
Views: 502

Re: Duplex MMDVM board not working correctly?

I don't think that the model of handheld was mentioned either. Might be useful to know in case there is something peculiar to it.
by G8SEZ
Fri Jun 05, 2020 9:42 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex MMDVM board not working correctly?
Replies: 50
Views: 502

Re: Duplex MMDVM board not working correctly?

Each Hat will be different depending on exactly what components it was built with, some TCXOs might be closer to the correct frequency and/or have lower phase noise leading to less noise close to the RF carrier. Different decoupling capacitors might affect the wideband noise generated by the Tx ADF7...
by G8SEZ
Fri Jun 05, 2020 9:11 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex MMDVM board not working correctly?
Replies: 50
Views: 502

Re: Duplex MMDVM board not working correctly?

Umm...connected to the SMAs on the PCBs. ;) But... Why would they work when I'm using the non-dual-hat config, but don't work when I am using the dual-hat config? Right, well the answer is that the low isolation between the Tx antenna and Rx antenna means that the Tx signal into the receiver is pre...
by G8SEZ
Fri Jun 05, 2020 9:05 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex MMDVM board not working correctly?
Replies: 50
Views: 502

Re: Duplex MMDVM board not working correctly?

The possibility exists that I'm not adequately explaining my issue. Since I'm using two different frequencies, I am, in fact, using duplex. My understanding is that a dual-hat modem is supposed to enable both timeslots, as well as allow me transmit on one timeslot, while the receiving another (or s...
by G8SEZ
Fri Jun 05, 2020 8:45 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex MMDVM board not working correctly?
Replies: 50
Views: 502

Re: Duplex MMDVM board not working correctly?

How do you have the antennas arranged? These dual Hats will have problems if you use the antennas connected to the SMAs on the PCB.

I also decided to buy a dual Hat via Amazon, I have a spare Pi sitting there not doing anything so adding a Hat to it enables further experimentation.
by G8SEZ
Fri Jun 05, 2020 6:13 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex MMDVM board not working correctly?
Replies: 50
Views: 502

Re: Duplex MMDVM board not working correctly?

I've just read the release information on the DUAL_HAT again. It says, for board version 1.1: "Solder jumper JP1 was added. It can be closed if the board is used on Raspberry Pi only. It ties BOOT1 to GND. BOOT0 is controlled via GPIO." Given that this was written by a non-native speaker of English,...
by G8SEZ
Fri Jun 05, 2020 5:49 pm
Forum: YSF Specific Support
Topic: FTM-400XDR Searching doesn't work
Replies: 5
Views: 80

Re: FTM-400XDR Searching doesn't work

N4TAJ wrote:
Fri Jun 05, 2020 4:04 pm
Is there any way to debug the connection? Can the pi-star log the commands/strings it sees from the radio? That would help me get to the bottom of this.
You could open a live log window from the admin page at the top right.