So does that mean that you have been able to talk to the AX5043s and you know SPI is working? How about MRAM? 73,

Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software*

On Sun, Jan 28, 2024 at 11:08 PM Bob Stricklin via pacsat-dev < pacsat-dev@amsat.org> wrote:

All,

I spent a time this weekend testing the boards and tweaking/changing the part values mostly in the 2M PreAmp and power divider section.

I created a new folder in Github PacSatDoc for TestData and uploaded the photos and a video to this folder. Not sure how Github feels about this but I will see. We can delete things after people have a chance to take a look.

The boiled down results are the PreAmp frontend has a range of 10 dB gain through the FET + Filter+ Power divider to 5 dB on the lowest. I checked all 8 of the balanced ports and found them to be mostly the same.

I turned down the 140 MHz carrier until I could see it just about the noise on the spectrum analyze and the most sensitive channel was working at -94dB.

Power supply info/photos was also uploaded.

Over the next few days I hope the test the final amplifier.

Uploaded a new set of STL files for the box. I looking at options to get these printed now.

Tomorrow i will push the code I have up to my GitHub site.

Bob

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