This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
home:special:emf:measure:meters [11.21.2018] – [alternative indicator] sallieq | home:special:emf:measure:meters [09.14.2022] (current) – external edit 127.0.0.1 | ||
---|---|---|---|
Line 30: | Line 30: | ||
Usually you can recognize them by their bulky/boxy shape. Some of these are made of a good enough quality that they don't produce excess " | Usually you can recognize them by their bulky/boxy shape. Some of these are made of a good enough quality that they don't produce excess " | ||
+ | |||
+ | ==== The spectrum ==== | ||
+ | |||
+ | {{: | ||
+ | |||
+ | Frequencies and wavelengths | ||
+ | {{: | ||
Line 41: | Line 48: | ||
There is a nice user-supported project, however, the " | There is a nice user-supported project, however, the " | ||
- | The designer' | + | The designer' |
I have used it to look at radiation from my neighbors' | I have used it to look at radiation from my neighbors' | ||
- | Here is a link to a convenient supplier: [[http:// | + | Here is a link to a convenient supplier: [[https:// |
It is relatively expensive because it is pretty sophisticated. Note that I am not suggesting this is worth every member rushing out and buying, but if you know you want a spectrum analyzer, I have given this one a through checking-out, | It is relatively expensive because it is pretty sophisticated. Note that I am not suggesting this is worth every member rushing out and buying, but if you know you want a spectrum analyzer, I have given this one a through checking-out, | ||
Line 84: | Line 91: | ||
The new SDR (Software Defines Radios) are an inexpensive way to look at a range of frequencies. You can buy a dongle, and an assortment of antennas, | The new SDR (Software Defines Radios) are an inexpensive way to look at a range of frequencies. You can buy a dongle, and an assortment of antennas, | ||
- | In the lab I also have a KiwiSDR, and it covers lower frequencies from 4KHz to 30MHz. You can access these free of charge | + | In the lab I also have a KiwiSDR, and it covers lower frequencies from 4KHz to 30MHz. You can access these free of charge |
I see little to no advantage with upgrading to the new Cornets. If you have one measuring to -65dBm, it will seve you well for a specific type of peak, quick-and-dirty measurement. | I see little to no advantage with upgrading to the new Cornets. If you have one measuring to -65dBm, it will seve you well for a specific type of peak, quick-and-dirty measurement. | ||
Line 111: | Line 118: | ||
If you can ask your power company where some of the new lights are installed, then you can do the same test at one of those locations. (And also use the sniffer for local UHF+Microwave levels.) | If you can ask your power company where some of the new lights are installed, then you can do the same test at one of those locations. (And also use the sniffer for local UHF+Microwave levels.) | ||
</ | </ | ||
+ | |||
+ | ===== Update ===== | ||
+ | |||
+ | < | ||
+ | |||
+ | Antenna recommendations have not changed since I made them earlier . The SRH789 covers all the bands, you need the SMA Male version, not the one ' | ||
+ | |||
+ | I suggest not purchasing an RFexplorer until you have grasped all the things there is to learn with the Cornet ED85EXS and the Kaito. | ||
+ | |||
+ | //Prof. Marshall Jan. 2019//</ | ||
+ | |||
+ | < | ||
+ | https:// | ||
+ | |||
+ | You need ask for the "sma male" connector on it. | ||
+ | |||
+ | Here is a directional antenna with connector for the 2G/ | ||
+ | https:// | ||
+ | |||
+ | ==== A Cornet ED85EXSa used to test mobile phone radiation ==== | ||
+ | |||
+ | |||
+ | [[https:// | ||
+ | |||
+ | A short video made by Dmitry measuring his mobile phone radiation | ||
{{tag> | {{tag> | ||
+ | < | ||
===== Notes and comments ===== | ===== Notes and comments ===== | ||
Line 122: | Line 155: | ||
+ | </ | ||