Monthly Archives: January 2016

RF tutorial website

The link (http://www.rfwireless-world.com/Terminology/PLL-lock-range-vs-capture-range.html) provides a good tutorial to explain some RF topics.

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RF tools on Web

LE LEIVRE.COM provides a lot of RF tools on web: http://leleivre.com/rftools.html

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Phase noise/jitter calculator on Web

Link one is https://www.jitterlabs.com/pn/pncalc.html Link two is http://www.changpuak.ch/electronics/phase_noise_jitter_conversion.php Link three is http://www.phasematrix.net/phasematrix/rf-design-tools/phase-noise-to-jitter-calculator Link four is http://www.abracon.com/phaseNoiseCalculator.php

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Outlet vs Receptacle

When I was in lab looking for those things to plug my computer, I don’t know the name at first. Then someone told me that is power outlet. But others told me it is electrical receptacle. At first, I think … Continue reading

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dBc and dBc/Hz and Phase Noise

dBc is referred to decibels relative to the carrier, which is the power ratio of a signal to a carrier signal. If the dBc figure is positive, then the relative signal strength is greater than the carrier signal strength. If … Continue reading

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Difference between dB, dBw vs dBm

Decibel(dB): dB = 10 log10 (x) For example, amplifier gain is Pout/Pin=G So Gain in dB = G(dB) = 10 log10 G dBw (dB watt): dBw = 10 log10 (P/1W) dBm (dB milliwatt): dBm = 10 log10 (P/1mW) Likewise, P(dBm)=0dBm … Continue reading

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HDD changed to RAW format and can’t be read

If you HDD can’t be read and its format becomes RAW, please open the cmd as a administrator account and then type the command “chkdsk  D:/f /x” (I use D disk as an example). Then the problem will be solved. … Continue reading

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