Search found 8 matches
- Thu Mar 28, 2024 6:28 pm
- Forum: Pi-Star General Support
- Topic: Generic NanoPi NEO MMDVM
- Replies: 1
- Views: 1208
Re: Generic NanoPi NEO MMDVM
Please check the frequency -offset. The TX/RX-frequencies can deviate by several 100Hz, your hotspot may work but you hear nothing.
- Mon Mar 04, 2024 7:48 am
- Forum: Pi-Star General Support
- Topic: Raspberry Pi 3 B +, which Pi-star to use?
- Replies: 11
- Views: 1301
Re: Raspberry Pi 3 B +, which Pi-star to use?
The parameters are called RXOFFSET and TXOFFSET. You can find them under configuration-expert-mmdvm. With this parameters you can adjust the frequency-deviation of the TCXO. Your TCXO-frequency should be 14.7456 MHz. An offset of 100 Hz leads to a deviation of abt 3 kHz for the Rx/TX-frequencies at ...
- Sun Mar 03, 2024 9:38 pm
- Forum: Pi-Star General Support
- Topic: Raspberry Pi 3 B +, which Pi-star to use?
- Replies: 11
- Views: 1301
Re: Raspberry Pi 3 B +, which Pi-star to use?
Did you check the frequency of the TCXO of your MMDVM? Sometimes there are frequency deviations of a few 100 Hz for the RX/TX-frequencies.
- Fri Feb 02, 2024 8:12 pm
- Forum: WiFi Setup
- Topic: Coffee Shop Connection
- Replies: 2
- Views: 776
Re: Coffee Shop Connection
I solve the problem with the captive portals by using a travel router GL-inet A1300. My hotspot is connected by LAN to this router, the power supply for the hotspot is the USB-port of the router.
- Wed Jan 10, 2024 3:42 pm
- Forum: DMR Specific Support
- Topic: Anytone 878 won't connect
- Replies: 3
- Views: 14421
Re: Anytone 878 won't connect
Did you check the frequency offset of the hotspot?
I had the same problem with my Anytone 878 and found, that the hotspot had an offset of more than 2 kHz. The Anytone seams to be sensitive to frequency offset.
I had the same problem with my Anytone 878 and found, that the hotspot had an offset of more than 2 kHz. The Anytone seams to be sensitive to frequency offset.
- Sat Jun 17, 2023 12:35 pm
- Forum: MMDVM_HS Hat(s)
- Topic: Intermittent/no receive
- Replies: 5
- Views: 4891
Re: Intermittent/no receive
imho it's not the output power of the hotspot but it's frequency. Did you check and adjust the RX/TX - offset e.g. by using MMDVMcal?
I had the same problem with my EuroNode, the offset was 2300Hz and after I entered it, everything works.
I had the same problem with my EuroNode, the offset was 2300Hz and after I entered it, everything works.
- Thu Mar 16, 2023 9:13 am
- Forum: MMDVM_HS Hat(s)
- Topic: TX output
- Replies: 4
- Views: 5407
Re: TX output
According to the datasheet the maximum output-power of an ADF7021 (mostly used in hotspots) is 13dBm.
Looking at the signal of this device, I would not recommend to connect it to an outdoor antenna or an power-amplifier without additional filtering means.
Wolfgang, DF1KZ
Looking at the signal of this device, I would not recommend to connect it to an outdoor antenna or an power-amplifier without additional filtering means.
Wolfgang, DF1KZ
- Mon Jan 23, 2023 2:11 pm
- Forum: Friendly Arm Nano Pi Neo / Neo Air
- Topic: mmdvm board used with the nanopi-air
- Replies: 3
- Views: 9487