开云体育

You can certainly perform a calibration with arbitrary values - all the electronic calibration units do this - they can't generate anywhere near perfect opens and shorts using electronic switches.

I personally don't think they will last long in the hands of a ham trying to learn, or demonstrate it to others. I rather suspect that sooner or later someone will produce something similar with SMA

Hello Dave, I agree to your statement, if the RF Test Kit is used for an university course. 73, Rudi DL5FA

Yes, but it does not solve the problem that a completely inappropriate connector is used.

I also ordered from Alibaba via a message on hugens store, and paid via Paypal on 12/30/19. I received today 1/8/20 via DHL. Well packaged, VERY nice unit (much better than the junk one I received

On Wed, Jan 8, 2020 at 11:33 AM, <entilleser@...> wrote: I have a relatively new ASUS Chromebook, with the latest Chrome version, and the experimental-web-platform-features enabled. The Web

That tool looks like it would take all of 5 minutes to make. - Ed

I have a relatively new ASUS Chromebook, with the latest Chrome version, and the experimental-web-platform-features enabled. The Web Client is working for me.

Hi, For clarification: An SI5351 outputs square-wave signals that contain only odd multiples of the fundamental frequency (3 * f, 5 * f, ...). To reach 1500 MHz, 7 * 214.285 MHz are therefore required

Hi SiLabs datasheets are so and so when it comes to clarity. The current datasheet says that Si5351A can go up to 200 MHz. However, the max VCO frequency is 900 MHz, and with the then "forced" divider

Forcing the SI5351 to above 1200MHZ VCO e.g. above 300MHz fundamental may overheat the SI5351 and permanently damage it. So you should be EXTREMELY careful when using a threshold command with values

There is also a physical explanation why the imperfections of SOL standards are described (of parameterized) in a certain way. The connection from the VNA goes through the connector (which has a

In addition to what Erik just said, if you ever perform a full clearconfig command via the console or install new firmware, you will need to reset the threshold level again.

Hello, I'm new here on the list, been a nanovna user for a couple of months now, otherwise a long time VNA user, from HP8410 times onwards. Just to add my 1.9999 cents... I find nanoVNA really great.

It said my jpeg is processing but I am not sure it uploaded.

Officially the maximum output frequency of any SI5351 is 800MHz divided by 4 is 200MHz. Many will be able to produce 300MHz but the increase of the VCO of the internal PLL to 1200MHz implies the

On Wed, Jan 8, 2020 at 04:54 AM, KE8CPD wrote: " Can anyone point to the correct chip? or any other tips to make my nanovna work about 300 mhz. "

Hi Gary, Regarding fringe capacitance, HP states that fringe capacitance can have an effect on measurement accuracy above about 300 MHz. This should explain “why” knowing fringe capacitance is

On Wed, Jan 8, 2020 at 01:09 PM, Dr. David Kirkby, Kirkby Microwave Ltd wrote: > Rudi, > The problem is the connector used on that is totally unsuitable. It is not > designed for repeated connections.

wrote: It's good to see some quantitative measurements made, but I believe the test procedure could be improved. Essentially it is irrelevant what the peak phase ch