JohnMcNutt
Industrial
- Mar 3, 2013
- 111
Hi all,
I have the need to look at some wave forms on incoming phone lines for amplitude and power influence. This is simply measuring the balanced phone line up to about 3 KC. As this is not a common occurrence for our shop we do not want to spend a mint on a differential probe. We just use a simple phosphor scope for most other measurements similar to this.
Would it completely skew our measurements to simply use a GFCI on the power supply and lift the ground lead in the power supply and leave the case of the scope floating? Is there a source for a cheap differential probe instead?
I have the need to look at some wave forms on incoming phone lines for amplitude and power influence. This is simply measuring the balanced phone line up to about 3 KC. As this is not a common occurrence for our shop we do not want to spend a mint on a differential probe. We just use a simple phosphor scope for most other measurements similar to this.
Would it completely skew our measurements to simply use a GFCI on the power supply and lift the ground lead in the power supply and leave the case of the scope floating? Is there a source for a cheap differential probe instead?