Weston Miller

The 1740a is definitely capable of processing audio signals as an oscilloscope and as a vectorscope. Both are defined in the manual and there are many videos of others using them in this way.<br> <br> Regardless, the issue is that&#160;<em>nothing&#160;</em>is clear on the screen, whether it's a waveform, oscilloscope, or vector, or even just the dialog options for the different menus.

Hi everyone, I'm pretty new to the oscilloscope world so please forgive my lack of knowledge.<br> <br> I recently bought a Tektronix 1740a that was supposed to be in full working condition, but the screen is extremely blurry, even the menu options that show up on the sides are unreadable. I have a picture attached to show what the screen looks like. I've tried adjusting the intensity and focus controls but this is as good as I can get it.<br> <br> I also have a 1740 (non &quot;a&quot;) that I may be able to pull parts out of if needed, but the guts of the two look very different so I wouldn't be surprised if it won't help at all. The 1740 works just fine, but I want to get the 1740a working to use for audio signals, which the regular 1740 isn't capable of.<br> <br> Thanks in advance!