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Here a direct comparison of the SI4432 as signal generator with the SI5351 First SI4432 at 300MHz The phase noise is obscured by strong spurs. The SI4432 uses a fractional PLL and I did not yet spend

I never did test a SI5351 as oscillator for the SI4432. Phase noise and noise floor are good enough for my applications (testing harmonics and other spectral content in home build transceiver) The

The snow has fallen and is sticking around... so I'm playing catch up on the electronics and RF engineering projects from last winter post the outdoor projects last year that scope creeped into this

I know that the number of bits depend on the settings and that the 12b is a "optimistic" value but had no idea about this. Will have to keep that in mind. Thanks.

After 20 years in the IT industry I was starting to feel a bit like a greybeard but compared to you guys I kind of feel like a youngster again :) "all thumbs" is the perfect way to describe it.

Dave, Good point, hadn't known. Thanks for describing the poor A/D performance of the typical Blue Pill board. I like the thought of a tinySA board with just an SPI port, make it processor agnostic.

I wasn't directly involved in either processor design, but in the late 70's I worked at a company called Ramtek (long since failed) where they had a PAL to flip the memory map (all 64kbytes of it)

Unfortunately, the raw specs can be misleading. The issue, typically, is noise which causes the lower bits of the ADC result to be garbage. There is a figure of merit for ADCs called Effective Number

Just checked with one of my STLink clones that I did not convert to BMP wondering how did I miss the serial port. Anyway it seems that virtual serial is not available with STLink 2 only with 2.1.

NXP app note with diagram and explanation is here: https://www.nxp.com/docs/en/application-note/AN10441.pdf

May have made a wrong comment, no need to do something in the ini file, should work out of the box. The ini file change is needed when you want to use SerialUSB with Blue Pill. -- HBTE Files section:

I had no idea that you could do that, will have to look it up. Thanks Dragan,

You win the internet for today ;) Totally unrelated to the topic but: with that kind of background how do you bare using Windows? Evrytime that I'm forced to use it (which is not often thankfully) I

That is what I did as first step. /g/HBTE/message/691 Although the NEO-7M may have some jitter when doing 10MHz the frequency counter does not mind and with its TXCO it is VERY stable

Dragan, In platformIO you can set your ini file to include a serial console over the STLink -- HBTE Files section: /g/HBTE/files Erik, PD0EK

I was talking about a 128kByte program for a 68000 compiled on VAX/VMS downloaded through a 9600 B/s connection. The downloading took most of the time Maybe this shows my age? And yes, I did build all

Wow, 3 hours to compile a C application? C should be as fast as anything else to compile. An interpreter like python skips the compile, but then run times are much slower. You either had a terribly

The RPi-Zero is nearly the size of a Nano, and with the monitor powered down that might well create about as much noise.? Actually I'm rather surprised Eric is getting such good results with his

It's a hobby, so if it's fun I suppose that's fine. But I'd rather just drive the 30mhz reference from an accurate RF source when needed. Could leave the crystal in place, just have an SMA in parallel

Only thing that is left now is to invent a cheap teleport machine and send it to Serbia ;)