Content deleted Content added
DAPNET and FunkrufMaster are completely independent work and do not originate by the same authors! Tag: references removed |
m radioamplifier fix |
||
Line 7:
==Technical specifications==
The recommended frequency for DAPNET is 439.9875 MHz,<ref>[https://hampager.de/dokuwiki/doku.php?id=dapnetfrq Recommended frequencies]</ref> which is 12.5 kHz below the upper limit of the 70-cm amateur radio band. The transmitters are networked, some via HAMNET, some via the Internet. The standard paging protocol POCSAG is used for message transmission. For a low-power transmitter you can use [[Raspberry Pi]] with unipager<ref>[https://github.com/rwth-afu/UniPager Github: UniPager]</ref> and MMDVM-modem<ref>[https://www.researchgate.net/publication/312934460_Development_of_a_Decentralized_Paging_Transmitter_Network Development of a Decentralized Paging Transmitter Network]</ref> installed, and to make the coverage area several miles,
Skyper and Alphapoc pagers are particularly popular for receiving messages. They can be easily tuned to the desired reception frequency and also offer many other possibilities, such as receiving bulletins - messages sent to all recipients. However, other brands of pagers can be customized accordingly or [[Flipper Zero]] can be used.
| |||