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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: easy fast rise time pulse generator?
Date: Sat, 12 Oct 2002 17:58:05 GMT
NNTP-Posting-Date: Sat, 12 Oct 2002 10:58:05 PDT
Larry Gagnon wrote:
> I require a fast rise time pulse generator to calibrate the vertical
> amplifier pulse response of my HP1722B oscilloscope. Obviously the
> pulse marks do not need to be of high frequency train because the
> scope is calibrated for this at a time/div of only 10 microseconds.
> Could anyone suggest a simple circuit that would give me a fast rise
> pulse? Any help greatly appreciated.
The old tried and true method of a reed relay driving a properly
terminated transmission line from a voltage source can hardly be beat.
Some of the old Tektronics calibrators for delay line adjustment and
rise time measurement used this method. Mercury wetted contact reeds
work best because they don't bounce.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org
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