[Techtoolslist] O-scope Z-Channel Question

[Matt Rossiter]

I'm using a Tektronix 475 Oscilloscope and, of course, I use XY mode for 
testing to see if the X and Y signals look good on the screen.  There is 
an external Z axis channel in the back, but I've never gotten it 
completely to work.  Someone once told me that I need to use an inverter 
to invert the signal into the probe - which sort of works, but I still see 
the vector retrace lines.  Is it possible to completely blank out the Z 
signals so that the picture looks the way it's supposed to?

Thanks

Matt