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13 votes

WWV, WWVH, and WWVL may be shut down. Are there any alternatives?

GPS-based frequency standards @larsks answer rightly pointed at devices that use GPS to generate the 1-second pulsing. That's the correct way to go. Curiously, these modules only address the once-...
Marcus Müller's user avatar
13 votes

WWV, WWVH, and WWVL may be shut down. Are there any alternatives?

In No WWVB? No problem!, KB6NU points at two projects that show you how to build your own low-powered WWVB-replacement to keep your clocks in sync: μWWVB: A Tiny WWVB Station. This project uses an ...
larsks's user avatar
  • 608
5 votes
Accepted

How to determine the PPM value of a NESDR SMArt?

Given that I don't have a frequency standard or other known transmitter available, what is the easiest way to calibrate the NooElec NESDR SMArt which is using a TCXO rated at 0.5 PPM.? I.e. to ...
Kevin Reid AG6YO's user avatar
  • 24.6k
4 votes

How to determine the PPM value of a NESDR SMArt?

I want to add some solutions to Kevins answer. Apparently I'm lucky to own the SMArt device as it is really stable with a PPM between 0.5 - 1.0 at all bands I've ...
not2qubit's user avatar
  • 378
4 votes
Accepted

WWV, WWVH, and WWVL may be shut down. Are there any alternatives?

Don't forget about CHU (and here is the official site) which is the Canadian equivalent to WWV. It's at lower power and it's not as well-located geographically (it's located near Ottawa), but it's ...
Jim MacKenzie VE5EV's user avatar
3 votes

Swan 350 calibration

Is their a way to get the vfo calibrated without the use of a a frequency counter? There certainly is! We use the US and Canadian government's standard frequency radio stations. See this question and ...
Mike Waters's user avatar
  • 7,986
2 votes

Most accurate way to measure signal power with (cheap) Spectrum Analyzer

However, depending on which options I choose on the Spectrum Analyzer, my measurements are different by up to 6-10 dB(!). Using a spectrum analyzer needs a bit of understanding what it does: it ...
Marcus Müller's user avatar
2 votes
Accepted

Measurement/calibration error after OSL calibration on VNA

Seems like I was indeed wrong. The displayed trace displayed was Data/Memory (hence the /M in the top of the screenshot). After redoing the calibration and selecting Data for display, the unit is ...
Dieter Vansteenwegen's user avatar

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