ua1zbe
/
rpitx2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update README.md

This commit is contained in:
Kuba 2023-10-30 19:24:54 +01:00 committed by GitHub
parent ebd0517e58
commit 46eee4ac7e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
README.md
View File

@ -134,6 +134,17 @@ We assume that input frequency is tuned on FM station. It is demodulated and mod
# Range
It has been mostly untested, but i've tested it on 95 mhz, with a 79 cm antenna, the signal depending on the directionality, transmitter elavation, it can reach about 300 meters
# Transmitter Power
By default the Raspberry Pi outputs 4 mA on a gpio pin, but here it gets overriden to max, which is about 16 mA, some apps have a setting to change the power, here is a sheet of the power levels and their correspondent radiated power: (NOTE: RADIATED POWER, NOT ERP, TO HAVE THE EXACT TX POWER OF A TRANSMITTER, THE ANTENNA EFFIECENCY AND GAIN WOULD NEED TO BE COUNTED IN THE CALCULATION)
0 = 6.6 mW
1 = 13.2 mW
2 = 19.8 mW
3 = 26.4 mW
4 = 33.0 mW
5 = 39.6 mW
6 = 46.2 mW
7 = 52.8 mW
# To continue
**rpitx2** is a generic RF transmitter. There is a lot of modulation to do with it and also documentation to make all that easy to contribute. This will be the next step ! Feel free to inspect scripts, change parameters (frequencies, audio input, pictures...).