Hello PSN,



I would like to run a frequency response test of my amplifier/filter but I
only have test equipment in the 50 Hz to 50 KHz range.



Do any of you have a recommendation for constructing a generator that would
output DC to 5 Hz with a uniform (flat response) voltage?



There was a CD disc someone was selling (RefCD) at the URL below that
modulates a 1 KHz sine wave with a 1 Hz since wave. I believe the idea is t=
o
filter out the 1 KHz signal at the output of a PC sound card. What are left
are pure VLF signals that could be used to sweep the amplifier/filter.



http://www.science-project.com/_members/science-projects/sponsorads/refcd/s=
eis.html



I know there are several freeware tone generators you can download, but I
don=92t think a PC sound card can reproduce DC to 1 Hz. Am I correct?



Thank you,



Rich
Hello PSN,
=A0
I would like to run a frequency response te=
st of my amplifier/filter but I only have test equipment in the 50 Hz to 50=
 KHz range.

=A0
Do any of you have a recommendation for con=
structing a generator that would output DC to 5 Hz with a uniform (flat res=
ponse) voltage?

=A0
There was a CD disc someone was selling (Re=
fCD) at the URL below that modulates a 1 KHz sine wave with a 1 Hz since wa=
ve. I believe the idea is to filter out the 1 KHz signal at the output of a=
 PC sound card. What are left are pure VLF signals that could be used to sw=
eep the amplifier/filter.

=A0
http=
://www.science-project.com/_members/science-projects/sponsorads/refcd/seis.=
html

=A0
I know there are several freeware tone gene=
rators you can download, but I don=92t think a PC sound card can reproduce =
DC to 1 Hz. Am I correct?

=A0
Thank you,
=A0
Rich
=A0