From 43d2ca5e5a5cf4d265c064561ef48ef6ab5578fb Mon Sep 17 00:00:00 2001 From: Kuba <132459354+KubaPro010@users.noreply.github.com> Date: Mon, 30 Oct 2023 19:14:12 +0100 Subject: [PATCH] Update README.md --- README.md | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/README.md b/README.md index b43f89b..d988163 100644 --- a/README.md +++ b/README.md @@ -19,7 +19,7 @@ Be sure to have git package installed : sudo apt-get update sudo apt-get install git ``` -You can now clone the repository. A script (install.sh) is there for easy installation. You could inspect it and make steps manualy in case of any doubt. You can note that /boot/config.txt should be prompt to be modified during the installation. If it is not accepted, **rpitx** will be unstable. +You can now clone the repository. A script (install.sh) is there for easy installation. You could inspect it and make steps manualy in case of any doubt. You can note that /boot/config.txt should be prompt to be modified during the installation. If it is not accepted, **rpitx2** will be unstable. ```sh git clone https://github.com/KubaPro010/rpitx2 @@ -48,7 +48,7 @@ sudo reboot | Pi3A+|OK| | Pi4|In beta mode| -Plug a wire on GPIO 4, means Pin 7 of the GPIO header ([header P1](http://elinux.org/RPi_Low-level_peripherals#General_Purpose_Input.2FOutput_.28GPIO.29)). This acts as the antenna. The optimal length of the wire depends the frequency you want to transmit on, but it works with a few centimeters for local testing. +Plug a wire on GPIO 4, means Pin 7 of the GPIO header ([header P1](http://elinux.org/RPi_Low-level_peripherals#General_Purpose_Input.2FOutput_.28GPIO.29)). This acts as the antenna. The optimal length of the wire depends the frequency you want to transmit on, but it works with a few centimeters for local testing. (Use https://www.southwestantennas.com/calculator/antenna-wavelength to calculate the lenght, make sure to use the 1/4 wave setting, as for 1/2 wave you'd need a impedance transformator, and these are not cheap [also yes, i learned it the hard way after having to cut my antenna]) # How to use it ![easymenu](/doc/easymenu.png) @@ -94,7 +94,7 @@ This is a picture transmission mode using audio modulation (USB mode). You need ### Pocsag (pager mode) ### ![pocsag](/doc/pocsagrpitx.JPG) -This is a mode used by pagers. You need an extra software to decode. Set your SDR in NBFM mode. +This is a mode used by pagers. You need an extra software to decode. Set your SDR in NFM mode. ### Freedv (digital voice) ### ![freedv](/doc/freedvrpitx.JPG) @@ -107,12 +107,12 @@ This a beacon mode which sound like Morse. You need opera in mode 0.5 to decode. ## Rpitx and low cost RTL-SDR dongle ## ![rtlmenu](/doc/rlsdrmenu.png) -**rtlmenu** allows to use rtl-sdr receiver dongle and **rpitx** together. This combine receiver and transmission for experimenting. +**rtlmenu** allows to use rtl-sdr receiver dongle and **rpitx2** together. This combine receiver and transmission for experimenting. To launch it, go to rpitx folder and launch rtlmenu.sh : ```sh ./rtlmenu.sh ``` -You have first to set receiver frequency and gain of rtl-sdr. Warning about gain, you should ensure that you have enough gain to receive the signal but not to strong which could saturate it and will not be usefull by **rpitx**. +You have first to set receiver frequency and gain of rtl-sdr. Warning about gain, you should ensure that you have enough gain to receive the signal but not to strong which could saturate it and will not be usefull by **rpitx2**. Choose your choice with arrows and enter to start it.**Don't forget, some test are made in loop, you have to press CTRL^C to exit and back to menu.** @@ -132,9 +132,8 @@ We assume that input frequency is tuned on FM station. It is demodulated and mod # To continue -**rpitx** 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...). +**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...). # Credits All rights of the original authors reserved. I try to include all licences and authors in sourcecode. Need to write all references in this section. -# rpitx2