On Tue, 25 Jan 2011 16:14:58 +1100, Phil Allison wrote:

"Meat Plow"
Phil Allison wrote:

My Leader audio generator doesn't do 100kHz.

** Which model is it??

Post a link to it.

I found 6 different "Leader" audio gens on the net and all go out to
at least 100kHz.


It's a LAG 120B and your right it's highest resolution is 1 Mhz.

Sorry. Never used it that high with amplifiers.


** Apology accepted.

( I can hardly believe I am posting that .... )

One reason for having 100kHz or more available on an "Audio Generator"
is to enable the testing of audio filters that may have turn over
frequencies at say 22 kHz. To find the roll of slope, one needs to
check the response for several octaves above that frequency.

Another use is in testing the response of audio transformers - ie
line, mic or valve output. These often exhibit severe ringing at
frequencies between 25 kHz and 150kHz. This can often be eliminated
with a suitable RC damping network.

Audio gens also need to go down to 1 or 2 Hz as well - so one can check
any sub sonic filters included in amplifiers and other devices OR to
force DC and anti-thump protection relays in power amps to cycle to
verify their operation.

Many other good reasons exist too.



.... Phil

Thanks and ESR solution archived. And I can't believe I didn't remember
the LAG 120 did 1 MHz seeing I've owned it now for 35 years. However I
ALWAYS used/use it for 400 -1000 MHz depending on calibration
instructions for various audio devices. I doubt it would even work on
higher resolutions without cleaning the push buttons. So once again
sorry.



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