Questions tagged [calibration]
9 questions
15
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3 answers
WWV, WWVH, and WWVL may be shut down. Are there any alternatives?
The US government is proposing to shut down the NIST standard time and frequency stations WWV, WWVH, and WWVB in Colorado and Hawaii.
If that actually happens, are there any free or inexpensive alternative frequency standards available so that we…
Mike Waters
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How can I calibrate a SWR meter?
I would like to build my own HF (1.8 - 30 MHz) SWR meter, however I'm not sure how I can calibrate the meter without an accurate power source. I'm targeting a power capacity of 150 W so I can use it with my HF radio. However, my test equipment at…
W5VO
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How to determine the PPM value of a NESDR SMArt?
a) 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 determine the PPM calibration value?
b) Also, is…
not2qubit
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5
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Measurement/calibration error after OSL calibration on VNA
Purchased a HP 8711A some time ago to learn how to make better measurements.
I've tried doing an OSL calibration with a 75ohms Agilent cal kit.
When reconnecting the short after succesful calibration, I would expect to have a return loss of 0dB…
Dieter Vansteenwegen ON4DD
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5
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3 answers
Are there any good, consistently receivable signals in the US for HF receiver testing?
Having built my first HF receiver, I'd like to know if I'll need to search around for transmissions that happen to be occurring, or if there are reasonably strong signals I can count on being present regardless of the time or day? I just want a…
Adam Davis
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1 answer
How would this RF field strength meter be calibrated?
I'm interested in an RF field strength meter that doesn't have to be lab quality, but still gives enough information about the RF field to know if an area exposed to RF is above the safety limits suggested by the ARRL and others.
One of the simpler…
Adam Davis
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2
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2 answers
Simplest, smallest antenna for tuning WWV, WWVH?
I'd like to perform some simple receiver testing and calibration (mostly for frequency variance, not signal strength) and have been told WWV/WWVH transmissions can be found throughout most of the US.
What would be a good, cheap, small antenna for…
Adam Davis
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1
vote
1 answer
Swan 350 calibration
So my swan 350 needs to sing properly and order it for to do so the VFO needs to be calibrated. I do not have a working frequency counter.
How do I get this stuff fixed so I can get her singing right.
Is their a way to get the VFO calibrated without…
Ben Madison KO4UXC
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Most accurate way to measure signal power with (cheap) Spectrum Analyzer
I am using an USRP X310 which is unfortunately not calibrated and the specs given are only very vague.
Hence I would want characterize the device with first-order measurements. Unfortunately I only have a cheap spectrm analyzer and scope (Gw Instek…
divB
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