Thursday 18 July 2019

Geekcreit GHz Signal Generator

Geekcreit offers a nice signal generator board for appr. 30 euros with microchip ADF4351. Frequency range 35 MHz - 4.4 GHz (!)
Highlights

With OLED display
Host computer USB & serial port
Integrated key operation
Good man-machine interface
Many improvements on the phase noise, phase spurious and loop filter
Module has 35 MHz - 4.4 GHz frequency output, point frequency, sweep, frequency hopping and other basic functions
Dimensions: 88mm * 67mm
Power supply: 5V-15V (DC 5.1MM); 5V (USB)
Bandwidth: ADF4351: 35MHz - 4.4GHz; ADF4350: 137MHz - 4.4GHz
Module step: 100KHz(min)
Frequency error: ± 1KHz
Output: OUTA OUTB two way
Module phase noise: better than -100dBc @ 10KHz (noise is different with different band phase)
Module output power: 7dBm (MAX)
Module interface: The external communication port of the STM32 USB can be configured to USB or analog serial port (in default)
Module program download mode: SW module, three-wire system (GND SWCLK SWDIO)

https://www.banggood.com/Geekcreit-Signal-Generator-Module-35M-4_4GHz-RF-Signal-Source-Frequency-Synthesizer-ADF4351-Development-Board-p-1416998.html?rmmds=mywishlist&cur_warehouse=CN

Off-topic:
Visit to the city of Gent, Belgium, July 31st, 2019
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8 comments:

  1. i2NDT Claudio16 August 2019 at 07:27

    This comment has been removed by the author.

    ReplyDelete
  2. i2NDT Claudio16 August 2019 at 07:28

    hi!
    did you buy it?
    I did and have a few problems...I would like to discuss.

    Claudio i2NDT

    ReplyDelete
  3. PA2RF16 August 2019 at 07:37

    Hi Claudio, thank you for your comment. No I have not bought it yet, though it is on my wishlist. What are your experiences ? Ciao, Ron

    ReplyDelete
  4. i2NDT Claudio18 August 2019 at 01:05

    this is the email I sent to Banggood customer service:

    here is the link to the video I made: https://drive.google.com/file/d/1KvHt9w5h2jXwxIWNuRmzrA0-atxN7W__/view

    by the way here is the explanation:

    when I check the "sweep" sub menu I get stuck as the keybord becomes inoperative and to go back to the main menu I must press the reset button.
    pressing the OK button generates that "WAIT" prompt which goes nowhere!!!

    the same problem was already addressed by others in the Q&A section but didn't get any answer:

    https://www.banggood.com/qa-answer-538762-1.html
    https://www.banggood.com/qa-answer-524188-1.html

    ReplyDelete
  5. PA2RF18 August 2019 at 02:12

    Thank you for this useful information. The caution should be: "Do not use tge SWEEP function".

    ReplyDelete
  6. Unknown10 March 2020 at 23:30

    about video - the problem is software. try re-new soldering points on resistors 10k. it's one body, they trouth commands from micro. also check buttons soldering. Sweep mode - you can jump to second line or end freq after finish fill this line, it willjump to second. return from sweep only resetting

    ReplyDelete
  7. Unknown13 June 2021 at 10:54

    Simply hold the centre ('OK' button down for a couple of seconds and this kicks the board out of sweep mode and re-enables the other buttons

    ReplyDelete
  8. Unknown28 July 2021 at 04:11

    PA2RF,
    Hi! Can you advise me how to compile the Geekcreit GHz Signal Generator source code downloaded from Banggood web site? I do not see any READ ME file, so I am clueless how to get it working on either my Win-10 or Linux Mint comnputer.
    73,
    KC3AKG

    ReplyDelete

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