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Think you may be confused in the way Marker | Center works. Marker | Center moves the center of the screen to the current Marker position not the other way around. It does not move the Marker. It

The Si5351 is rated to 200 MHz but most work to well over 300 MHz on the fundamental. There are other products out there, notably among them RFzero , that are based on the 5351 and produce usable

Wow, quick update Oristo. Lets hope none of the other builds aren't different! Mike

How does the nano do that when the Si5351 can only generate a square wave up to 200MHz? The schematic shows these signals just come straight? out? Digital Alias signals or something?Sent from my

Thanks Hugen, I ordered it. Thanks to the others too. I know I can use the NanoVna without it but I like using the switch mainly for moving the marker. Jim K.

Attached spectrum analyzer plot shows the output of the nanoVNA at three different CW stimulus settings: Red trace shows 250 MHz setting - Fundamental is used. Green trace shows 350 MHz setting -

https://lcsc.com/product-detail/Multi-Directional-Switches_Korean-Hroparts-Elec-K1-1502SA-01_C145915.html

Hi Mike - Based on my experiments, firmware uses (only) last selected marker to set START, STOP, CENTER, or CW. SPAN seemingly uses 2 markers...

Hi Mike - Thanks for feedback; content is updated: http://ormpoa.altervista.org/Hnano.htm

I did actually do that and was seeing about the same return loss. The plot is somewhat noisy and there is a periodic spike at perhaps 300 MHz as captured in the attached photo. Peter

Attached is a spectrum analyzer plot of the nanoVNA with CW output set for 300 MHz. The second harmonic at 600 MHz is -19 dBc as is the third harmonic at 900 MHz. Warren Allgyer WA8TOD

Would you be able to use your OSL load to calibrate the nano and then run a scan with it on the supplied dummy? A comparison of the plots ftom the nano vs the 8753 should be interesting. I note that

The project isn’t “stuffed,” it only becomes limited in frequency at the high end. Even if it only goes to 200 MHz it will be an incredible device. Peter

There is no second harmonic from the square wave of the Si5351, only the 3rd and 5th harmonic.? Also if you look at the specs of the SA612 it's only up to nominally 500MHz. The latter is pushed way

I'm using the latest FW 08_02_19 800_ch version. I have a possible bug. Set sweep range: Start 46 MHz Stop 54 MHz Then set Marker | Center. You'd expect the marker to be a 50 MHz, but instead it's at

.... and frequency error on my unit at cold start is 237 Hz at 900 MHz = 0.26 PPM WA8TOD

Elaborating: The "measurement range" quoted by the manufacturer is the range between the displayed carrier level and the displayed noise level. That range deteriorates from 300 - 600 MHz because the

Jim, Go to your local thrift store or recycling depot (or junk box) and look around the electronics section for portable devices that might use that type of switch. A lot of MP3 headphones use them.

Mine meets that specification. WA8TOD

So is the vendor lying when the manual says:Measurement range: 70dB (50kHz-300MHz), 50dB (300M-600MHz), 40dB(600M-900MHz);Port swr <1.1 Frequency error <0.5ppm?Sent from my Samsung Galaxy smartphone.