Catalyst
Full Member level 3
Hi all,
I have a series R-C circuit with a connection to a function generator set to a 10MHz Sine wave via a BNC cable.
If I want to take voltage drop measurements across the R and the C individually do I have to consider the length of the BNC cable feeding the circuit?
The cable I have is 2 Metres, does it have to be comparable to 1/4 or 1/2 of the wavelength?
How important is the cable length of the feeding signal?
Added after 1 hours 57 minutes:
Just to add to the previous question.....
The little series RC circuit has the following parameters:
Voltage Source Input = 2V pk-pk, 60Hz, Sine Wave
R = 1 MegaOhm
C = 180 pF
Measured Voltage Drop Across 'R' = 1.76V
Measured Voltage Drop Across 'C' = 1.88V
The total phasor voltage = (1.76² + 1,88²)½ = 2.5V (Approximately)
Why isn't the total voltage 2 Volts?
Im sure I'm missing something very simple here.
Any guidance is much appreciated
Cat
I have a series R-C circuit with a connection to a function generator set to a 10MHz Sine wave via a BNC cable.
If I want to take voltage drop measurements across the R and the C individually do I have to consider the length of the BNC cable feeding the circuit?
The cable I have is 2 Metres, does it have to be comparable to 1/4 or 1/2 of the wavelength?
How important is the cable length of the feeding signal?
Added after 1 hours 57 minutes:
Just to add to the previous question.....
The little series RC circuit has the following parameters:
Voltage Source Input = 2V pk-pk, 60Hz, Sine Wave
R = 1 MegaOhm
C = 180 pF
Measured Voltage Drop Across 'R' = 1.76V
Measured Voltage Drop Across 'C' = 1.88V
The total phasor voltage = (1.76² + 1,88²)½ = 2.5V (Approximately)
Why isn't the total voltage 2 Volts?
Im sure I'm missing something very simple here.
Any guidance is much appreciated
Cat