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.
Continue reading “Max freq of test equipment”Author: Grzegorz
Ext 10MHz for Hameg HM8021
For a long time I wanted to calibrate the Hameg 8021-2 to my external 10MHz GPSDO. But, unfortunately, the crystal oven is not very stable. My thought was, why calibrate if you can use the back BNC connector to feed the external 10MHz signal from the GPSDO? So, this was an easy task. Find the internal 10MHz, disconnect it, connect to rear via 1nF capacitor. Done ;)
Continue reading “Ext 10MHz for Hameg HM8021”Linux shell commands
Here are some useful Linux CLI commands, I will do more good examples in the future. For Germans: #maleben
Continue reading “Linux shell commands”Panasonic RF-P50 Page
The Panasonic RF-P50 is a small portable/pocket AM/FM radio, with telescopic antenna and a bar antenna inside. It has somehow good sensitivity and selectivity on AM, also tuning is very precise and smooth. Beware: there is RF-P50D (with D at the end) version of the radio, but it’s the DSP version of it. Does not tune smoothly, and the RX is not as good as it can be in analog mode.
Continue reading “Panasonic RF-P50 Page”Kapitalismus andersrum
Was wäre, wenn wir nicht so viel wie möglich, sondern so wenig wie möglich verkaufen würden? Ich meine nicht “nichts”, aber nur so viel, wie notwendig und von Kunden willentlich gewollt. Und mit notwendig meine ich nicht durch Werbung “verursachte” Verkäufe, sondern Verkäufe, weil die Menschen nach den Produkten und Dienstleistungen eigenständig gesucht haben.
Continue reading “Kapitalismus andersrum”