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I know, but I have display and box for the SA. /Niels, oz9ny

A lot of hackers take small amounts from lots of people hoping people won’t notice or care. Chris

That noise on 10mhz is not seen when probing the GPIO2 pin.

Erik, Good to know a bit more about SGIN. SiLabs documentation is not terribly concise. And curious that attenuators around the mixer do not seem to help. Perhaps more trouble shows up with a complex

Looks beautiful!! Some time ago I did measure the impact of the copper tape covering the long wires and you get indeed about 50 ohm impedance. Very cheap and very flexible coax replacement. Strongly

Niels, The latest tinySA.ino SW on github contains a full graphical touch UI. -- HBTE Files section: /g/HBTE/files Erik, PD0EK

Perhaps that's what JohnP was suggesting. But I assumed he was talking about some other IF, as the 434mhz IF on the tinySA is definitely not below 50mhz. As Erik says, an 8 bit A2D has a dismal

Erik, I didn't chase it, but when I looked at my 10mhz reference with a scope and set the trigger a little bit high, I saw some occasional disruption in the 10mhz. Could be that the Si4432 doesn't do

My TinySA is taking form. I haven't yet removed the filters from the Si4432 modules because I wanted to see how they fit on the board. I will combine Erik's TinySA software with this

My tinySA is starting to work, built ugly/manhatten style on a 2.25"x4.0" (55mm x 100mm) copper clad board, sized to be the lid of a Seasons brand sardine tin.

An RTL-SDR dongle has a terrible dynamic range due to its 8 bit ADC Anything loud that comes through the BPF will deafen the RTL-SDR I tested this in my 2GHz SA where I used an RSP1 on the 10.7Mhz IF.

There has been some debate on having attenuators around the mixer, it is even suggested it may reduce spurs. So I did test. First picture is a scan of the 15MHz power calibration signal with 6dB

Might be interesting to put a DVB-T SDR dongle on the tinySA's 433.92mhz IF, you could listen in as the tinySA slowly sweeps through a ham band. The inverse of that panadapter idea. Jerry, KE7ER

If you want to demodulate signals, a better approach might be to use an SDR on the IF; you'll most likely need an attenuator and maybe an up-converter as the SDR dongles don't work below 50MHz without

Certainly plan to make any code available, but at the moment am working away from home (retirment is still a way off unfortunately) and cannot access the files.? Perhaps at the weekend, maybe best

Not naive. Sometimes measurement accuracy can be more important than dynamic range. But not always. AGC could be a menu option if it works well enough. Jerry, KE7ER

Hi Dave et.al. using the ESP32/ESP8266, any plans to upload to the HBTE groupsio Files section ( /g/HBTE/files ) ?? The code(s) would be great to review if you can as I was thinking

So perhaps this is a naive perspective, but I would think that having AGC enabled in a spectrum analyzer would always be sub-optimal during measurement sweeps - because the changing gain/attenuation

Dave, One other thing, that sgin bit in register 0x69. Not totally obvious to me exactly what the devil it does. If you have it set, I suggest you clear it. Jerry, KE7ER

*UPDATE - UPDATE - UPDATE* I want to go on the record that my statement on Sunday pertaining to the Arduino Nano cannot be modified for 3.3VDC by changing the regulator and doing some additional