Is this oscilloscope working ? or is it broken?

[Sam Kaan]

In these photos I can adjust the dot(s) along the vertical axis. Although
the Plugins are put in incorrectly.

http://members.rogers.com/cadnewbie/tek/osc1.JPG
http://members.rogers.com/cadnewbie/tek/osc2.JPG
http://members.rogers.com/cadnewbie/tek/osc3.JPG
http://members.rogers.com/cadnewbie/tek/osc4.JPG
http://members.rogers.com/cadnewbie/tek/osc5.JPG
http://members.rogers.com/cadnewbie/tek/osc6.JPG
http://members.rogers.com/cadnewbie/tek/osc7.JPG
http://members.rogers.com/cadnewbie/tek/osc8.JPG

In these pictures, I can only adjust the dot(s) along horizontal axis. This
time the plugins are in the
correct slots on the mainframe. However I can not for some reason move the
dot along the vertical axis, but
only along the horizontal. I did try to turn the knobs label as "offset"
and "position", those two big knob on the left Plugin.

http://members.rogers.com/cadnewbie/tek/horiz0.JPG
http://members.rogers.com/cadnewbie/tek/horiz1.JPG
http://members.rogers.com/cadnewbie/tek/horiz2.JPG
http://members.rogers.com/cadnewbie/tek/horiz3.JPG

I had a chance to go to the library today and look at a book about using a
scope. In it, it talks about you have to turn the
TIME/DIV knob to the X-Y position on the dial before you can change the
vertical and horizontal position of the trace.
But on my scope, the TIME/DIV knob has no X-Y dial position.

I think that the scope itself is ok as far as being able to place the dot
anywhere on the screen, as can be shown in the previous pictures I took.
So it is possible the plugins themselves are bad. Or perhaps there are
something else I forgot to set which would have made this to work.

I am very at it, and would hope someone can help me get this thing working
or at least determine for sure that its not working
so I can describe to a repair shop what's wrong with it.

 

[Robert Baer]

Sam Kaan wrote:

In these photos I can adjust the dot(s) along the vertical axis. Although
the Plugins are put in incorrectly.

http://members.rogers.com/cadnewbie/tek/osc1.JPG
http://members.rogers.com/cadnewbie/tek/osc2.JPG
http://members.rogers.com/cadnewbie/tek/osc3.JPG
http://members.rogers.com/cadnewbie/tek/osc4.JPG
http://members.rogers.com/cadnewbie/tek/osc5.JPG
http://members.rogers.com/cadnewbie/tek/osc6.JPG
http://members.rogers.com/cadnewbie/tek/osc7.JPG
http://members.rogers.com/cadnewbie/tek/osc8.JPG

In these pictures, I can only adjust the dot(s) along horizontal axis. This
time the plugins are in the
correct slots on the mainframe. However I can not for some reason move the
dot along the vertical axis, but
only along the horizontal. I did try to turn the knobs label as "offset"
and "position", those two big knob on the left Plugin.

http://members.rogers.com/cadnewbie/tek/horiz0.JPG
http://members.rogers.com/cadnewbie/tek/horiz1.JPG
http://members.rogers.com/cadnewbie/tek/horiz2.JPG
http://members.rogers.com/cadnewbie/tek/horiz3.JPG

I had a chance to go to the library today and look at a book about using a
scope. In it, it talks about you have to turn the
TIME/DIV knob to the X-Y position on the dial before you can change the
vertical and horizontal position of the trace.
But on my scope, the TIME/DIV knob has no X-Y dial position.

I think that the scope itself is ok as far as being able to place the dot
anywhere on the screen, as can be shown in the previous pictures I took.
So it is possible the plugins themselves are bad. Or perhaps there are
something else I forgot to set which would have made this to work.

I am very at it, and would hope someone can help me get this thing working
or at least determine for sure that its not working
so I can describe to a repair shop what's wrong with it.

Firstly, i believe one must have at least 3 plugins installed; i may
be incorrect.
There is no such thing as an "incorrect" position for a plugin; any
compatible, working plugin will work in any one of the 4 positions. All
4 can be amplifiers, or traces, or samplers, or spectrum analyzers,
or...any mix you want.
One can move the spot/trace position at *any* time, so ignore that
part of what you read.

Now look carefully on the two goups of white, wide buttons on the
mainframe.
On the left they are clearly labelled: LEFT, ALT, ADD, CHOP, RIGHT.
These select the Vertical Mode, and for all of the "OSCn" photos, you
have CHOP selected, when there is clearly only one plugin installed in
the vertical bays. The 2 dots as shown is from the CHOP mode. But if the
sweep plugin was working, one dot would be seen, and a vertical trace
would also be seen.
On the right they are clearly labelled: A, ALT, CHOP, B. These select
the Horizontal Mode, and for all of the "HORIZn" photos, you have the
proper bays selected (LEFT, B).

Except for the 7B52 Dual Time Base, i cannot see the plugin type, as
the plastic "pull tab" used to remove the plugin is missing.
Double check that these plugins are indeed 7-series and not 5-series
(i do not know if 5-series will even totally plug into a 7-series
mainframe).

In any case, it appears that the delaying sweep plugin is not working,
as it should "free-run" with the Auto or P-P Auto modes (which you have
clearly chosen). If it was working, one vertical trace would have been
displayed with the sweep in a Vertical bay, and one horizontal trace
would have been displayed with the sweep in a Horizontal bay.