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General logic ICs of the 74xx series

This is a list of number of pins and the function of general-purpose logic ICs of the 74xx series. There is also 54xx and 40xx series.

View 500MHz on Tektronix TDS380

This is how the old good Tektronix TDS380 acquires a 500MHz signal from Marconi Instruments 2031 signal generator. Very stable, calm trigger and display. No jumping around, albeit using 16x averaging.

Playing with the oscilloscope

This is frequency modulated signal on a oscilloscope, but the carrier frequency is lower than the modulation frequency.

Juniper JunOS fwdd commands

Those commands can show you the status of fwdd:

Max freq of test equipment

Many measuring devices have a maximum frequency up to which they work correctly, as stated by the manufacturer. Above that frequency they don’t just stop working, rather they still have a range above where they still may work correctly, just aren’t as sensitive. Many oscilloscopes, for example, can work up to twice their bandwidth, but the measured amplitudes are not more than some random numbers. You can still see the waveform, but not do any meaningful measurements.