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The VOLTS/DIV knob for Both channels 1 & 2 will not rotate past the 5 volt indicator. The lower ranges act normally.It would be nice to have the 10/20/50 Volt ranges working.
Searching 'here',it doesn't appear to be a common problem, but I have to ask, before I venture * inside *. Any help is appreciated. klc |
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I assumed that someone would've answered you earlier, but I don't see any reply (but I only just got your post, so maybe relevant messages are stuck in the Great Cloud somewhere). In any case, the higher voltage ranges correspond to the scope being used with a 10:1 probe. The scope itself does not have those higher ranges. If you look carefully, there are two illuminators behind the knob skirts. The higher range one lights up when a 10:1 probe with the right dingus (to tell the scope that it's a 10:1 probe) is used. Random third-party probes rarely have this feature, so you have to keep the factor of 10 straight in your head. So, stop trying to rotate the knob further. :)
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-- Cheers, Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 On 11/19/2021 18:05, K Cleary via groups.io wrote:
The VOLTS/DIV knob for Both channels 1 & 2 will not rotate past the 5 volt indicator. The lower ranges act normally.It would be nice to have the 10/20/50 Volt ranges working. |
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That is where the knobs stop in the 1x range. You should see that there are two small windows above the knob and behind the numbered collar. The "5" on the clear collar should stop above the left window (illuminated when scope is "on") situated behind the clear collar. The 10/20/50V ranges are attained by using a properly equipped TEKTRONIX 10X probe which will cause the left side window to go dark and the right side window behind the collar to then illuminate.
The Window to the left is illuminated when the scope is turned on (if the circuit and lamp are not damaged) and the Window to the right should come on when a TEKTRONIX 10X probe is used which connects the contact ring of the BNC to the ground through a spring loaded pin. This is called "probe coding". I hope My attempt to explain makes sense. -- Michael Lynch Dardanelle, AR |
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D'oh!
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Yes. The probe has the little pin sticking on the connector. Ya need the correct probe ! Thank you, klc On Monday, November 22, 2021, 04:18:02 PM EST, Tom Lee <tomlee@...> wrote:
I assumed that someone would've answered you earlier, but I don't see any reply (but I only just got your post, so maybe relevant messages are stuck in the Great Cloud somewhere). In any case, the higher voltage ranges correspond to the scope being used with a 10:1 probe. The scope itself does not have those higher ranges. If you look carefully, there are two illuminators behind the knob skirts. The higher range one lights up when a 10:1 probe with the right dingus (to tell the scope that it's a 10:1 probe) is used. Random third-party probes rarely have this feature, so you have to keep the factor of 10 straight in your head. So, stop trying to rotate the knob further. :) -- Cheers, Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 On 11/19/2021 18:05, K Cleary via groups.io wrote: The VOLTS/DIV knob for Both channels 1 & 2 will not rotate? past the 5 volt indicator. The lower ranges act normally.It would be nice to have the 10/20/50 Volt ranges working. |
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As I said to Prof. Lee, D'oh!
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Now,I know better, at least, I think I do. Thanks Mike, klc On Monday, November 22, 2021, 04:29:57 PM EST, Michael W. Lynch via groups.io <mlynch003@...> wrote:
That is where the knobs stop in the 1x range.? You should see that there are two small windows above the knob and behind the numbered collar.? The "5" on the clear collar should stop above the left window (illuminated when scope is "on") situated behind the clear collar.? The 10/20/50V ranges are attained by using a properly equipped TEKTRONIX 10X probe which will cause the left side window to go dark and the right side window behind the collar to then illuminate.? The Window to the left is illuminated when the scope is turned on (if the circuit and lamp are not damaged)? and the Window to the right should come on when a TEKTRONIX 10X probe is used which connects the contact ring of the BNC to the ground through a spring loaded pin.? This is called "probe coding".? I hope My attempt to explain makes sense.? ? -- Michael Lynch Dardanelle, AR |
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Please call me Tom! :)
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--Cheers, Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 On 11/23/2021 17:27, one6146 via groups.io wrote:
As I said to Prof. Lee, D'oh! |
Michael W. Lynch