Measuring Input Impedance of MSO5074

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Over here I asked about the measurements I was getting when I tried to measure the input impedance of my scope with my multimeter.

I was getting a reading I didn’t expect or understand, but that turned out to be because of a dud BNC to banana adapter that I was using.

For some reason this adapter had either a 1.5 MΩ or a 6 MΩ resistance across it. It would change from time to time when I plugged in banana plugs. Weird. I can only assume some sort of manufacturing problem.

I threw the adapter in the bin and measured again with functional equipment and got the reading of 1 MΩ that I was expecting.

Period and Frequency

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I made a thing.

Oh, wait. I made it better.

These charts show how period, frequency, and the speed of light are related to each other, in scientific and compact units.

Period is measured in seconds, frequency is measures in Hertz (cycles per second), and the distance of light travelled during one period is measured in meters (it is also known as the wavelength). The equation for wavelength is:

λ = c / ν

Where λ is the wavelength in meters, c is the speed of light in meters per second, and ν is the frequency of the wave in Hertz (cycles per second).

Wavelengths between 400 nanometers (nm) for violet light to 700 nm for red light are the visible component of the electromagnetic spectrum. The frequency of red light, on the low end of the visible spectrum, is about 430 terahertz (THz); whereas violet light, on the high end of the visible spectrum, is around 750 THz.

Sets

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Stolen from here.

LaTeX like this:

\begin{table}[H]
    \caption{Number Sets}
    \label{tab:email}
    \begin{tabular}{cl}
        \midrule
        $\mathbb{N}$ & Natural Integers \\
        $\mathbb{Z}$ & Relative Integers \\
        $\mathbb{D}$ & Decimal Numbers \\
        $\mathbb{Q}$ & Rational Numbers \\
        $\mathbb{R}$ & Real Numbers \\
        $\mathbb{I}$ & Pure Imaginary Numbers \\
        $\mathbb{C}$ & Complex Numbers \\
        \midrule
    \end{tabular}
\end{table}

$\mathbb{N} \subset \mathbb{Z} \subset \mathbb{Q} \subset \mathbb{R} \subset \mathbb{C}$