Quote:
Originally Posted by astral highway
... And then your point about what it means if a component says ‘50R’ ‘...doesn’t mean I am 50R, it means connect me to 50R’. Thank you!
That’s probably a ‘source’ of confusion to many! ...
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You can see how the confusion arises though. My favourite audio signal source is an HP8903A which contains a low-distortion sine oscillator whose output amplitude can be dialled up to anything between 1mV RMS and 6V RMS. The signal leaves via the connectors on the extreme left of the front panel, shown here
https://www.mikrocontroller.net/atta...01/HP8903A.jpg. If you squint you can probably see that it says 600Ω alongside those connectors.
In this case it really does mean that the
source impedance is 600Ω. The unit will only work 'properly', in the sense that it will deliver the voltage that you've dialled up, if you connect it to a
load which is much higher in impedance than the value written on the front panel. If you connect it to 600Ω you will instead get only half the volts shown on the big bright display.
Cheers,
GJ