general_amateur_info:hotspot_notes [Atlanta Ham Radio Wiki]

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======Hotspot Notes======

====Assigned Frequencies====
Believe it or not, [[https://sera.org|SERA]] has allocated frequencies for crossband repeat use. There is //only// an allocation for the 70cm band.\\
You can find the full document [[https://sera.org/wp-content/uploads/2016/11/sera-fup-440.pdf|here]].

=== Digital Hotspot Frequencies for DMR, DStar, NXDN, P25, YSF, etc.===
**“Hotspots” are low-power digital interface devices intended to bridge between the Internet and
hand-held digital-mode radios.**
| 440.9250 | 440.9500 | 440.9750 | 441.0250 | 441.0500 |
| 441.0750 | 441.1000 | 441.1250 | 441.1500 | 441.1750 |
These recommended frequencies are shared with Narrow Band FM
Digital Simplex users, and care should be taken to not choose a frequency already used locally. \\
No amplifier or external antenna should be used with a hotspot, and the transmit power of the
corresponding radio should be set to minimum.

====Home Hotspots====
I recently adopted the [[https://w0chp.radio/wpsd/|WPSD software by W0CHP]] for my RaspberryPi hotspots in 2025. 

I have two hotspots in the house. One for DSTAR and another for DMR.

**Hotspot Equipment**
  * RaspberryPi 3B+
  * MMDVM Duplex Hotspot Module Dual Hat