This repo collaborates with the Satcom radio website!

Plase check it's transverters section for more info.

UR3LMZ Transverter Controller

Repo for controlling the UR3LMZ transverter made by Alexander.
It also uses a customized and simple ADF4351 library.

With this code you will be able to configure the RX and TX offsets.

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Here is a tutorial on how to set up the Arduino IDE software so you can upload your own offsets

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This allows a very narrow band radio like the Icom 9700 to work on satcom frequencies using this transverter.
You can even set a radio to a fixed frequency like 440mhz and then just control it's RX/TX frequency only using the offsets.

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It's important to note that for the UHF transverter, the offsets decrease the frequency and for VHF increases it.

Check the images in the Doc folder of the repo to see how the default firmware (checked with a logic analyzer) configures the registers for RX and TX of the ADF4351.

Be sure to check also the datasheet of the ADF.

Arduino sketches

In the Sketches folder you will find 3 sketches.

1. AttinyIndependent This sketch allows you to upload the code to the attiny and configure the frequencies you want in the selector.
   Use the ADFSoftware to calculate the registers and insert them in reverse order (from R5 to R0) as done in the sketch.

2. AttinySlave This sketch makes the Attiny a slave of an arduino. It only tells the arduino using UART if it's in RX (0) and when it is transmitting, in what position you have the selector (1-3).

3. ArduinoController Upload this sketch to an arduino and you'll be able to control the transverter. It basically recieves the status from the AttinySlave and set the configured frequencies using an ADF4351 library.
   Feel free to expand this sketch to add a screen controller using encoders or whatever idea you may have.

4. ArduinoFrequencyFinder This sketch sends a TX tone with a duration of few milliseconds in a frequency range. This allows finding the uplink of a satellite while looking at an SDR.

In order to compile any of the Attiny sketches with an Arduino UNO:

1. Install the microcore board to be able to compile Attiny code.
2. Copy the ADFLibrary into your arduino libraries folder.
3. Upload the example Arduino ISP sketch into your ardino board
4. With the transverter turned OFF. Connect the pins to the transverter board following this picture
   MOSI - 11, MISO - 12, CLK - 13, RESET - 10, 5V and GND
5. Upload the Attiny sketch with Sketch -> Upload using programmer selecting the Attiny13 as board.

Final notes

• In case you want to increase the output power of the transverter, you can drive it at 9V to get a 1W output and feed with it the bias of an amplifier.

• It's recommended to install a fan, replace the back cover with an aluminium plate or at least add a heatsink. Check the 3DPrint folder for a full case cover that allows to connect a JST XH 2.54 connector and a 60x60 FAN

• You can use a spectrum analyzer to check the frequencies of the ADF on the first pin of the output pins.
  If you're using a tinySA consider using an attenuator as it's output is +7dbm and it's close to it's limit.

• If you want to check the output frequency of the transverter without using the internal amplifier, you can remove the jumper.