I would like to verify measurements taken by another person with a Fluke Scopemeter and would appreciate some feedback. Measurements were taken at various outdoor points such as a well casing and metal tin of a building to see if there was any voltage/frequency present.
Here is how it was hooked up: A ground rod was sunk in the earth approximately 100 feet from the Scopemeter. This was connected with a piece of RG-6 coax with the shield connected to the center conductor at the ground rod. Only the center conductor of the coax was connected to the scope ground connection. Two more coax cables approx 100 feet in length was routed to the metal siding on a building and an underground well casing. Again the shield was connected to the center conductor at these two points. Again, only the center conductor of the coax was connected to inputs A and B.
I believe there is a big problem with capacitance, reflective energy and impedance matching. These last 3 decades I have mostly lived in the electrical world and only stray into the electronics arena from time to time so I am hoping to get some insight into this connection method from some scope/rf experts.
It seems to me that the shield should be connected to the center conductor at the Scope end and/or connected to the shield from the ground rod. Any insight into precisely how scope input leads can properly be extended with RG-6 coax would be appreciated!
Here is how it was hooked up: A ground rod was sunk in the earth approximately 100 feet from the Scopemeter. This was connected with a piece of RG-6 coax with the shield connected to the center conductor at the ground rod. Only the center conductor of the coax was connected to the scope ground connection. Two more coax cables approx 100 feet in length was routed to the metal siding on a building and an underground well casing. Again the shield was connected to the center conductor at these two points. Again, only the center conductor of the coax was connected to inputs A and B.
I believe there is a big problem with capacitance, reflective energy and impedance matching. These last 3 decades I have mostly lived in the electrical world and only stray into the electronics arena from time to time so I am hoping to get some insight into this connection method from some scope/rf experts.
It seems to me that the shield should be connected to the center conductor at the Scope end and/or connected to the shield from the ground rod. Any insight into precisely how scope input leads can properly be extended with RG-6 coax would be appreciated!