Ok. Let’s try this again…RCA 9TC240 Alignment

[Chris K]

I hooked everything up the way Penthode documented in his photo. From sweeper to counter:
Aux out to counter
Inhibit to inhibit
Blanking to blanking
Sweep out to sweep in
Sweep out from 8600 to horizontal scope input

[bandersen]

OK, well inhibit isn't going to work with your scope and you have nothing on the vertical so all you will see is a horizontal line. Meaning that, so far, it looks like it should.

[Chris K]

I posted sequential photos of hooking up the cables one by one because these cables are 3 feet long and too jumbled up like a plate of noodles to follow from the 8601 to the 8600. But here you go as best I can

[Chris K]

Originally Posted by bandersen

OK, well inhibit isn't going to work with your scope and you have nothing on the vertical so all you will see is a horizontal line. Meaning that, so far, it looks like it should.

But I don't see markers...Penthode showed this setup without a vertical input and he had 5 markers on the horizontal trace. That's what I'm trying to reproduce but there are no markers.

[Chris K]

Would a Textronix 465 make all of this easier if I can get my hands on a working one?

[Yamamaya42]

Originally Posted by Chris K

Would a Textronix 465 make all of this easier if I can get my hands on a working one?

you said you had an analog scope, what type is it?

[Chris K]

In the latest picture but I haven’t used it in years and one of the beams is messed up

[Penthode]

Just any plain old scope with a an X-Y display will work. Is something inhibiting the display? Make sure the scope is not set to trigger.

Without the RF connected you should see a horizintal line trace. The dots will appears when the marker controls are set mid position. Remember if the marker controls are set fully CW or CCW, you will not see the dots. (And CW in this case is Clock Wise!)

Let's look for the sweep line first. What is inhibiting the trace on the scope? If the sweep output of the generator is not reaching the x input of the scope, you should just see a dot in the center of the screen. It may be you have the scope set to deflect the trace off screen to the left or right.

Maybe to start, let us see the scope display with a dot in the center of the display with NOTHING connected. Then connect the sweep x input to the scope. You then need to raise the brightness and/or adjust the scope X channel centering control. Also make sure you start with the highest setting of the v/div control and it would be useful to begin with the X Channel set to AC input.

[Yamamaya42]

Originally Posted by Chris K

In the latest picture but I haven’t used it in years and one of the beams is messed up

I can't see any pics here @ work...

will have to wait till later.

[bandersen]

Originally Posted by Chris K

But I don't see markers...Penthode showed this setup without a vertical input and he had 5 markers on the horizontal trace. That's what I'm trying to reproduce but there are no markers.

Correct. You will NOT see markers using the setup he outlined using a digital scope. You cannot reproduce it using the HP digital scope using the inhibit technique.

I suggest you try connecting the Z-axis output to the z-axis input on the digital scope. If that doesn't work, you will have to use an analog scope.

Yes, a 465 or 2213 will work. Rotate the timebase on the 2213 to XY

[Chris K]

Originally Posted by Penthode

Just any plain old scope with a an X-Y display will work. Is something inhibiting the display? Make sure the scope is not set to trigger.

Without the RF connected you should see a horizintal line trace. The dots will appears when the marker controls are set mid position. Remember if the marker controls are set fully CW or CCW, you will not see the dots. (And CW in this case is Clock Wise!)

Let's look for the sweep line first. What is inhibiting the trace on the scope? If the sweep output of the generator is not reaching the x input of the scope, you should just see a dot in the center of the screen. It may be you have the scope set to deflect the trace off screen to the left or right.

Maybe to start, let us see the scope display with a dot in the center of the display with NOTHING connected. Then connect the sweep x input to the scope. You then need to raise the brightness and/or adjust the scope X channel centering control. Also make sure you start with the highest setting of the v/div control and it would be useful to begin with the X Channel set to AC input.

I have the 3MHz sweep line. What I don’t have are the markers. When I push in the button to select a marker I get a read on the marker Nikki tubes that’s very unstable and unreadable

[Chris K]

Originally Posted by bandersen

Correct. You will NOT see markers using the setup he outlined using a digital scope. You cannot reproduce it using the HP digital scope using the inhibit technique.

I suggest you try connecting the Z-axis output to the z-axis input on the digital scope. If that doesn't work, you will have to use an analog scope.

Yes, a 465 or 2213 will work. Rotate the timebase on the 2213 to XY

Z axis input on the scope? Where is that? I have 3 BNC inputs on the scope…X Y and external trigger

[bandersen]

external trigger is the z-axis input in XY mode

[Chris K]

Here is a picture of the settings on my analog scope and the trace. Those blips on the line, I can't move them or put anymore on the line so I don't think they're markers nor do I know if I have this scope setup correctly other than having it in X-Y mode.

[Chris K]

BTW I set the center frequency down to 22.25MHz