Hi all,
Having picked up a used spectrum/network analyser just recently in a moment of big luck, I thought I'd share any meaningful measurement I'm doing with it, over time. Not many people will have access to such an instrument, let alone hobbyists, and measurements of power supply components and systems are scarce.
A network analyser is an extremly poweful tool for impedance measurements which is basically most what power supply issues are about. Looking at the effective impedance seen at the point of load, say, a chip amp's power pins, is what counts, effectively.
The spectrum/network analyser was built late '90ies by the reputed german measurement equipment company Wandel & Goltermann.
The model is SNA-2, the second model in their range which adds phase measurement capability to the earlier SNA-1. Frequency range is 100Hz...180MHz which is just perfect for audio use.
Sitting on my bench it looks like this (note that it is comprised of two really heavy 19" die-cast aluminum boxes packed with electronics to last cubic inch) :
![Click the image to open in full size.]()
Having picked up a used spectrum/network analyser just recently in a moment of big luck, I thought I'd share any meaningful measurement I'm doing with it, over time. Not many people will have access to such an instrument, let alone hobbyists, and measurements of power supply components and systems are scarce.
A network analyser is an extremly poweful tool for impedance measurements which is basically most what power supply issues are about. Looking at the effective impedance seen at the point of load, say, a chip amp's power pins, is what counts, effectively.
The spectrum/network analyser was built late '90ies by the reputed german measurement equipment company Wandel & Goltermann.
The model is SNA-2, the second model in their range which adds phase measurement capability to the earlier SNA-1. Frequency range is 100Hz...180MHz which is just perfect for audio use.
Sitting on my bench it looks like this (note that it is comprised of two really heavy 19" die-cast aluminum boxes packed with electronics to last cubic inch) :
