开云体育

If you are interested in knowing the field strength at your location, you only need to consider the equipment at your end. It makes no difference how the field happened to get there. If you are

So, I asked ChatGPT and gave me this answer: Is "shortcut formula" good enough for my use-case?

Thank you. I think I found the line in the code to edit. Thanks again.

Search *ESD* in the Messages section for more information

The source of the tinySA is on github. You can change this value in the code and build a new FW -- Designer of the tinySA For more info go to https://tinysa.org/wiki

The selftest shows that U22 needs to be replaced, no problem But I see D4 at the RF input. Is this a real diode? There is no recognizable marking on the part. Because if so this tests blown also. What

Thank you all for recommending affordable log periodic antennas! The PCTEL OP451 ( 450 MHz – 6 GHz, vertical polarization) I found is around $90 (used, not new). Is it worth that price tag? As I

Hi Erik, I have tried to all options that I know of to get the TinySA Ultra ZS405 to auto save traces as fast as possible. The best I can get is every 30 seconds. There seems to be a hard cutoff in

WA5VJB makes several log periodics: https://www.wa5vjb.com/products1.html Note, Kent spent a LOT of time developing these antennas. They are made for a specific dielectric constant for FR4/G10. The

There are also available printed LPs with included antenna factors already documented. And.... considerably less $$ than the referenced Amazon units. Just do a www search. Dave -

I use this PC board-based log-periodic antenna for EMI searching: https://www.amazon.com/gp/product/B07NS8M3Y1 To be reasonably useful I put a preamp right on the antenna connector.

My goal is to have a "good-enough" and cost-effective antenna for the 600 MHz - 6 GHz spectrum As a probe for scanning how the spectrum is occupied and at what power levels are the signals. I think I

Hi Charlie, Can I assume G is dBi not dBd Cheers Dave [email protected]> wrote:

Hello Dave I'd be interested to know more about your disc dipole experiment, size and materials etc? A Google search brought up nothing. 73s Tracey G5VU

A better option to the discone is the bicone. Sure, it's larger, but behaves a bit more like the LP over frequency, but without the directionality. For his purpose, the discone may serve as the

I agree 100%, Dave. At least if directionality is the goal. Since the OP originally posted a vertical antenna, I presumed he wanted omni-directionality with flat gain over a large bandwidth. And if

I presume G is gain. Is that in dB or the numerical ratio before the 10log[ratio]? Dave - W?LEV [email protected]> wrote: -- *Dave - W?LEV*

The Schwartzbeck log periodic is by far the better antenna. They offer a far flatter response response and are directional. Directionality allows one to do a better job of finding RF emission

In general, a log-periodic antenna will give flatter gain response over a wide frequency range than will a vertical antenna. But the log-periodic antenna is more directional (in the direction of the

I am asking first about the PCTEL OP451 antenna, but also in comparison with, say, a Schwarzbeck USLP 9143 Log Antenna ( http://schwarzbeck.de/Datenblatt/K9143B.pdf ) As I need the antenna as a mobile