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<DIV>Do you know the scope is functional?</DIV>
<DIV>If the spot disappears, you may have the input coupling set to DC, when it
should be AC, since you don’t know if there’s a DC offset present.</DIV>
<DIV>If you are on AC coupling and the spot disappears, then you may have more
signal than your sensitivity allows. That is, the signal may be offscale
top and bottom.</DIV>
<DIV> </DIV>
<DIV>When the input and scaling are right, you should see a vertical line
showing the amplitude of the signal.</DIV>
<DIV>Once you have that, you set triggering to auto, AC, and adjust the trigger
level pot to get a sweep.</DIV>
<DIV>You can use the scope to see DC offset, but the sensitivity must be
reduced enough to keep the trace onscreen.</DIV>
<DIV>If the offset is large, then the AC component may look very small,
meaning you are making two measurements.</DIV>
<DIV> </DIV>
<DIV>Beware of connecting the scope to high DC voltages, especially if you are
not using an attenuating probe. You can blow an input amp!</DIV>
<DIV> </DIV>
<DIV>Let us know what happens,</DIV>
<DIV>WL</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=ac1wye@gmail.com
href="mailto:ac1wye@gmail.com">Alexander N. Gerli</A> </DIV>
<DIV><B>Sent:</B> Sunday, September 21, 2014 12:59 PM</DIV>
<DIV><B>To:</B> <A title=heath@puck.nether.net
href="mailto:heath@puck.nether.net">heath@puck.nether.net</A> ; <A
title=heathkit@mailman.qth.net
href="mailto:heathkit@mailman.qth.net">heathkit@mailman.qth.net</A> </DIV>
<DIV><B>Subject:</B> [Heath] IO-4235 scope operation question.</DIV></DIV></DIV>
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<DIV class=gmail_default
style="FONT-SIZE: large; FONT-FAMILY: comic sans ms,sans-serif; COLOR: rgb(0,0,255)">Hi,
folks,<BR><BR></DIV>
<DIV class=gmail_default
style="FONT-SIZE: large; FONT-FAMILY: comic sans ms,sans-serif; COLOR: rgb(0,0,255)">I'm
having trouble getting a trace on my scope. That is to say, I'm just trying to
read some p-p voltages while working on an old transceiver. I can get a spot and
center it, but I can't get the horizontal sweep to start. Naturally, all I have
is the Assembly Manual for it. Can someone give me some generic help on what
settings I've got to use to read this? I've set it up for 10V p-p, but then I
attach the probe to the circuit point, the spot goes off-screen like it's
clamping. Tried different voltage settings, no luck. The darn sweep won't start.
and I've probably got an incorrrect setting somewhere.<BR><BR clear=all></DIV>
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<DIV><SPAN style="FONT-FAMILY: comic sans ms,sans-serif"><FONT size=4><SPAN
style="COLOR: rgb(0,0,255)">
<DIV class=gmail_default
style="FONT-SIZE: large; FONT-FAMILY: comic sans ms,sans-serif; COLOR: rgb(0,0,255); DISPLAY: inline">Thanks
for the help! 73, Sandy AC1Y</DIV><BR><BR></SPAN></FONT></SPAN></DIV><SPAN
style="FONT-FAMILY: comic sans ms,sans-serif"><FONT size=4><SPAN
style="COLOR: rgb(0,0,255)"><BR><BR>Alexander N. Gerli,
Sr.<BR></SPAN></FONT></SPAN></DIV><SPAN
style="FONT-FAMILY: comic sans ms,sans-serif"><FONT size=4><SPAN
style="COLOR: rgb(0,0,255)">548 Allred Mill
Road<BR></SPAN></FONT></SPAN></DIV><SPAN
style="FONT-FAMILY: comic sans ms,sans-serif"><FONT size=4><SPAN
style="COLOR: rgb(0,0,255)">Mount Airy, NC
27030-2202<BR><BR></SPAN></FONT></SPAN></DIV><SPAN
style="FONT-FAMILY: comic sans ms,sans-serif"><FONT size=4><SPAN
style="COLOR: rgb(0,0,255)">Scotsmen walk about 900 miles each
year.<BR></SPAN></FONT></SPAN></DIV><SPAN
style="FONT-FAMILY: comic sans ms,sans-serif"><FONT size=4><SPAN
style="COLOR: rgb(0,0,255)">A Scotsman drinks around 45 gallons of Whisky a
year.<BR></SPAN></FONT></SPAN></DIV><FONT size=4><FONT size=4><FONT size=4><FONT
size=4><FONT size=4><FONT size=4><FONT size=4><FONT size=4><FONT size=4><FONT
size=4><FONT size=4><FONT size=4><SPAN
style="FONT-FAMILY: comic sans ms,sans-serif"><SPAN
style="COLOR: rgb(0,0,255)">Scotsmen get about 20 Miles Per
Gallon.</SPAN></SPAN><BR></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></DIV></DIV></DIV>
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_______________________________________________<BR>Heath mailing
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