[sdiy] Filter Frequency response measurement ?

[Needham, Alan]

That's pretty much what I would do ...
Ramp (or tri) at maybe 10 Hz driving scope X input (DC coupled) 
and modulating sine osc.
Sine osc covering required range into filter
Filter into scope Y input

Why bother with anything else, you will see the response like this,
it should be good enough to compare topologies or whatever.

A noise source and FFT would be nice if you have it but I don't :-(

	Alan


# -----Original Message-----
# From: synth-diy-bounces at dropmix.xs4all.nl
# [mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of dj hohum
# Sent: 27 July 2007 11:08 AM
# To: synth-diy at dropmix.xs4all.nl
# Subject: [sdiy] Filter Frequency response measurement ?
#
# My understanding of the process is that you use a ramp generator that
# sweeps the horizontal of my scope in XY mode and a voltage controlled
# sine wave generator at the same time. You feed the sine wave into the
# filter and feed the output of the filter into a detector, either peak
# or RMS?


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