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???
07/27/07 14:12
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#142423 - one of those heavily (ab)used probes...
Responding to: ???'s previous message
... developed some sort of leak or what, so it behaved like a low-pass filter plus some loss - VCC was a straight line different from ground, so you would not be alarmed if you didn't take a close look at the dial next to the vertical resolution button, (this was an old analog scope, no displayed values on the screen).

Thinking about it, it was most probably some fault on the divider's compensation circuit or what. Didn't investigate...

It was exactly the sines on where nice rectangular signals were previously which alerted me that something is not OK. It was a luck I looked at a digital signal, because we were actually debugging the analog part of the box.

JW


List of 23 messages in thread
TopicAuthorDate
Cannot get the MSC1211Y5 to program            01/01/70 00:00      
   (old) slow scope?            01/01/70 00:00      
      MSC1211Y5 - scope            01/01/70 00:00      
         digital chip generating sine waves, I do not think            01/01/70 00:00      
         Depends            01/01/70 00:00      
            probe            01/01/70 00:00      
               I habitually 'scope' Vcc as the first thing when            01/01/70 00:00      
                  one of those heavily (ab)used probes...            01/01/70 00:00      
            MSC1211- probe            01/01/70 00:00      
               too good :-)            01/01/70 00:00      
                  5MHz            01/01/70 00:00      
                     "should be correct" - again            01/01/70 00:00      
                        EVM means evaluation board            01/01/70 00:00      
                           HAVE YOU TURNED THAT KNOB ALREADY?            01/01/70 00:00      
                              KNob            01/01/70 00:00      
                                 What solid line?            01/01/70 00:00      
                                    OK it's more a sqaure wave            01/01/70 00:00      
                                       Eh ?            01/01/70 00:00      
                     please turn that @#$%^ horisontal frequency knob!            01/01/70 00:00      
                        To Jan Waclawek: freq Knob            01/01/70 00:00      
   Scope bandwidth?            01/01/70 00:00      
      Back to MSC1211Y5 problem            01/01/70 00:00      
         both            01/01/70 00:00      

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