34MHz to 4.4GHz Frequency Synthesizer

Name: 34MHz to 4.4GHz Frequency Synthesizer
SKU: 10944
Price: 64.00 USD
Availability: Discontinued
Rating: 4.75 (1 reviews)

(1 Review)

A serial controllable synthesizer that will output any frequency between 33MHz to 4.4GHz. Arduino Pro Mini + ADF4351

Designed by ZachTek in Sweden

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34MHz to 4.4GHz Frequency Synthesizer 10

34MHz to 4.4GHz Frequency Synthesizer 11

34MHz to 4.4GHz Frequency Synthesizer 12

34MHz to 4.4GHz Frequency Synthesizer 13

34MHz to 4.4GHz Frequency Synthesizer 14

34MHz to 4.4GHz Frequency Synthesizer 15

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2017-11-21T18:11:28.495Z-Driving from a Serial converter.png

2017-11-21T18:11:28.495Z-Anotated PCB.JPG

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2017-11-21T18:11:28.495Z-Spurios free at 4GHz.JPG

2017-11-21T18:41:35.222Z-Gain Flatness 10dB per division.jpg

2017-11-21T18:11:28.495Z-A33MHz signal on the Oscilloscope.png

A serial controllable synthesizer that will output any frequency between 33MHz to 4.4GHz. Arduino Pro Mini + ADF4351

What is it? It's a frequency generator that you control using serial commands. The synth has a built-in pre-programmed Arduino Pro Mini that runs a commands parser so you can set any frequency simply…

What is it?

It's a frequency generator that you control using serial commands.

The synth has a built-in pre-programmed Arduino Pro Mini that runs a commands parser so you can set any frequency simply by sending is over the serial port.

It can be run on voltages from 3,3V to 5V and takes about 140mA of current.

There are two complimentary 50 ohms outputs that give out 0dBm. The output is pretty flat over the entire frequency range. (See picture)

It has a stability of 2.5ppm (parts per million) or better when using the built-in TCXO 10MHz reference. If you need more precision or stability there is an input for your own frequency reference.

The frequency steps are 1MHz at 4GHz and about 150kHz at 40MHz. Future firmware may improve on this and might include I2C support as well.

To set the frequency to 150MHz simply send the command SETFREQ 150000000 on the serial port. There is also support for sweeping between a start and stop frequency, for incrementing or decrementing the frequency, turning off or on voltage regulators etc. See Screenshots for more info on serial commands.

The Synth uses an IDC10 connector for all signals and power but a standard FTDI header is also available.

Why did you make it?

To solve my frequency needs in Radio receivers, transmitters, Lab equipment etc.

What makes it special?

It is designed with good care for electric parameters like frequency stability, phase noise etc while still being easy to use so it can be used by novice as well as the more advanced RF engineers. If you know how to use a serial port you can use this device!

Review Breakdown

Average Ratings

Product: (5.00)

Documentation: (4.00)

Shipping: (5.00)

Communication: (5.00)

James | Dec. 20, 2017

Great addition to my workbench.

The ARB on my bench can only output 5 MHz (20 MHz sine waves.) So I needed something that could provide a higher frequency output. My current scope is limited to a couple hundred megahertz. The signal quality at 100MHz is on-part with my expectations and works for my use. I really like the Serial interface. It simplifies the control. I'm interested in I2C for automation, but for now, simple ASCII commands works for me.

Great job on the board, thanks!