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Hi Everyone, I'm trying to develop my own rfid antenna for mfrc522. It's my first one, so... it's very difficult. Do you know the procedure to properly tune my antenna ? Or a good tutorial to help me

Less than 690ns of group delay difference is quite good. Is this filter specified to be a linear phase filter? Is there an inter symbol interference and data rate you are trying to achieve? When GD is

I didn't display the phase, but since I had saved a couple of measurement sets in S2P format, I went back into NanoVNA Saver and loaded one and displayed the group delay (thanks for the hint about

Thanks, Soren! Yes, I can see that some shielding would probably be beneficial. This was definitely a "quickie" jig construction and I neglected a bunch of issues like that since I wasn't at all

The pc saver routine that works with the vna will do group delay measure and display.

David, thank you, very interesting! Did you measure phase? Interest in US FM has waned with the changes for HD that take out adjacent channels, and FCC coverage area equalization. Lack of geomagnetic

Hi, Thanks for sharing. I have worked with development of FM tuners for 10 years (1995-2005), so have a lot of experience in measuring these filter and characterize them mathematical. The group delay

Hello, This email message is a notification to let you know that the following files have been updated in the Files area of the [email protected] group. * /Crystal measurements with the

You're not OLD - you're MATURE !! ;-) Glad it's working for you. 73 - Larry

You nailed, Larry! I happened to have one that came with my grandson's $49 tablet. I thought it was just a usb adapter. I'm glad I kept it. Never heard of such a thing says the 71 year-old guy.

Also, make sure you're using an OTG (On The Go) USB cable that connects to the tablet (NOT the Nano) and enables HOST mode on the tablet. The Nano then plugs into the OTG cable's USB-A connector.

On Mon, Mar 2, 2020 at 07:05 AM, Ed K wrote: "... I've loaded the app on my Galaxy Tablet with Android 7.0 and all I get is "No Device Found" when I connect the tablet to the NanoVNA.."

This is how my electronic luck runs... I've loaded the app on my Galaxy Tablet with Android 7.0 and all I get is "No Device Found" when I connect the tablet to the NanoVNA. I've tried four different

Link added: /g/nanovna-users/wiki/User-Guides

Link updated: /g/nanovna-users/wiki/User-Guides

Added to /g/nanovna-users/wiki/Application-Notes#test-jigs

Addded to /g/nanovna-users/wiki/Application-Notes#test-jigs

I had some fun today doing a preliminary set of measurements on a few of the small 3-legged 10.7 MHz ceramic bandpass filters used in FM stereo tuners. Changing out these filters is a workable way to

Excellent post Nick, Very detailed and correct. Herb shows a span width of about 50kHz. A span width of 2kHz to 5kHz would be pretty good. The C0 value shown will be garbage when looking near