Products > Test Equipment
AliExpress $30 35MHz-4.4GHz ADF4351 Touchscreen Signal Generator
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maximvs:
I made a video on my mods to the ADF4351> This is my first video so I am sorry for the "not great" quality. I will make an update though. Here it is:
mawyatt:
Nice work!!

Do you have the ability to do some narrow band measurements like I've posted a few threads above, especially since you are using an external reference which I assume has excellent phase noise?

I was impressed with what the ADF4351 can accomplish. Kind of a "poor persons RF signal source", doesn't have any modulation capability, nor large output range scaling, but not bad for ~$30 IMO.

Best,
EV:
I bought also this touch screen generator. I attached some picture of its square waves. They are taken from my Tektronix 7904  scope with 7T11 and 7S11 (with S-4) plugins installed.
EV:
I attached some more pictures of wave forms. Amplitude is 250 mV on 100 MHz square wave but it is 450 mV on 4 GHz sine wave. Amplitude setting is the same in the generator all the time.

It looks that the peak to peak amplitude is nearly same on all different frequencies.
EV:
As the rise time of the generator is about 70 ps (look at attached picture) the BW of the generator is 350/ 0.070 = 5 000 MHz. It means that this generator can show square wave correctly  to 5000/5 = 1000 MHz and more accurately only to 5000/10 = 500 MHz. You can notice this on the pictures of previous post.
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