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In the past I tried to use log detectors but if you want to know power and frequency and modulation, using a tinySA Basic with appropriate external attenuation seems a lot simpler Displaying frequency

Mike, I'd been eyeing various log detector devices for some time. This one had an interface and was cheap, so I bought it. Not so sure of the accuracy. All 4 of my tinySAs produce around -7 dBm

Reg, When the weather is warm I do lots of portable operation as well as sailing on a friend's boat. I am looking for a small portable power meter to measure the output of FM and SSB transceivers.

Supposing the log amp chip they are using can sample fast enough, and a fast enough ADC too... one could? do it in software... by looking for the peak in the samples. I can't remember; but, if there

Nope ... that one was about 2.5X more expensive... had a fairly solid shielding box (similar to those cheap(er) microwave components) and was a some RF conditioning (on the front end) followed by an

Thank you I will be happy to answer any questions. Kind regard Matthias www.dd1us.de<http://www.dd1us.de> Von: [email protected]

Very impressive!

Tried that

Hello, not the same as the Chinese version but maybe of interest for some of you: this summer a friend of mine (Michael DK1MI) and me developed a remote VSWR & power meter. You can find the English

Reg, Try a SMALL drop of water or light oil on the chip, sometimes it will make the marks visible. Leon Robinson ?? K5JLR Political Correctness is a Political Disease. Politicians and Diapers should

Mike, Lord, I don't know. I just got it and am investigating. Do you have test cases to propose? With the chipping markings sanded off it's a puzzle what chip it's using. I'm guessing an HMC602 from

This is a similar budget version, bare boards and different chip. Thanks for the link. I think there's a lot of potential in a well designed power meter with an integral 0.25 dB step attenuator and a

Wasn't this reviewed or one similar on The Signal Path? https://youtu.be/kmxloZUzDeE Sam

Reg, Thanks for the feedback. Does this power meter measure peak power or does it just measure average or RMS power? I'm looking for a portable instrument to measure the PEP power from my QRP SSB

Just using the 8648C and a pair of JFW attenuators as reference, it appears to have an acceptably accurate dynamic range of 0 to -56 dBm The FW is terrible and doesn't even debounce the keys! But it

https://www.aliexpress.us/item/3256805245384099.html The actual unit is around $33 USD. Typical misleading landing pages. Rather annoyed they don't say what chip, but it's obvious from the BW and

Thanks for some helpful pointers. I should have been maybe been clearer. It's a dual PLL based system which I ultimately want to test (to help avoid the reference source noise level being the limiting

Would adding a Schmidt trigger gate in series with a clock improve phase noise?

Just to add to this: Prop II's GPIO DACs are about as fast as the digital CMOS process allows. The full power bandwidth is well beyond 100MHz. They are screamers and plenty good for high resolution

Possibly the cheapest way of doing this is using Parallax Propeller II. It has excellent 8-bit DACs - literally one per GPIO pin. These DACs have a fixed low impedance and are purely resistive - a