开云体育

Not if the transformer has continuity between inner and outer conductors, but it only takes a second, cultivates a good habit and will do no harm. 73, Don N2VGU

Fonts size, not possible change (or need more work for UI and text position and sizes) Remember state (select and save config) allow save several state (like freq range, bandwidth, points count,

Interestingly I cannot confirm that coax cable necessarily degrades over time! Of course, if cable gets waterlogged, it will degrade. But properly used, which means avoiding water ingress, it can last

Hi Don, I agree – always a good practice to short center conductor and shield together before connecting to an instrument. Even better is to short them together and connect the shorted junction to

You might wait for Erik to weigh in. I don't know that it wouldn't work with appropriately harmonically related frequencies. I suppose it sets the receive LO, and the back end only has a few kHz BW.

This is good practice before connecting any cable to any instrument. I usually short the inner and outer conductors against the outer conductor of the connector to which it will be attached; I

Thanks, David, for answering my question. So the reference must be quite close to the measured frequency. Won't work with my 10 MHz GPS reference. Of course, I have several signal generators, but none

I believe that the maximum frequency difference between the PFA's two inputs in 200 Hz (not kHz or MHz), so the two signals you are comparing must be very close in frequency. Dave - WA8YWQ

So if I have a GPS reference of a couple of parts in 10^13, that will be my accuracy, and only at 10 MHz output from my GPS "clock"? With the 10 MHz reference from GPS, will it measure ADEV on other

The coax cable capacitance stores up a charge and if you short the ends of the coax together you discharge it. When shorted you can also touch the terminals to ground of you want to be really

The tinyPFA can measure the phase difference of two 10MHz signals with 1e-13 accuracy in one second Its accuracy and resolution is better than any of the big timer/counters but less then the

Hello, I own the "Upgraded AURSINC NanoVNA-H4 V4.3 Vector Network Analyzer 10KHz-1.5GHz HF VHF UHF 4''" (purchase link is here

It has two inputs, so you (by calculation) beat one input against the other, using the internal clock. https://www.tinydevices.org/wiki/pmwiki.php?n=TinyPFA.Homepage If you want to get into this kind

Thanks, Jim! I was embarrassed to ask, but.... Having worked on the GPS (rubidium) clocks in the formative days of the birds, I am all too familiar with Allen Variance (most of which I've forgotten).

Phase/Frequency Analyzer - a box that measures the Allan Deviation and Phase Noise of a source.

Please forgive me for not being familiar with all the "new" acronyms infiltering our standard english language. Although PFA is undoubtedly an RF acronym, I am unfamiliar with its meaning? "Pretty

Erik, Delivered within 24 hours! Everything seems to be there for the experimenter without doing any software manipulation. I didn't realize it had its own 'PFA-markings' on the nanoVNA. Now, 'real'

Some years ago we needed to use HF (3 - 30 MHz) T-type Moonraker Antenna with ATU. Good antenna. I have no any connection with Moonraker as well. Best regards, Stefan DImitrov I am surprised some folk

Very helpful, both of you. Appreciate it.

Yes ; here is the latest Widows x64 link https://github.com/NanoVNA-Saver/nanovna-saver/releases/download/v0.6.2/NanoVNASaver.win.x64.zip 73 Rick KA2PBO Sent from Mail for Windows Sent: Thursday,