Difference between revisions of "61000-4-20"
(→Voltage measurements: 3-Positions) |
(→Emission) |
||
| Line 7: | Line 7: | ||
# multi pole model | # multi pole model | ||
# three voltage measurements | # three voltage measurements | ||
| + | |||
| + | With the correlation the assumption is that under far field conditions the emitted power | ||
== Multi pole model == | == Multi pole model == | ||
| Line 16: | Line 18: | ||
| − | <math>S | + | <math>S=\sqrt{ V_{x}^2 + V_{y}^2 + V_{z}^2 }</math> |
<math>V_{x}</math>, <math>V_{y}</math> and <math>V_{z}</math> are the measurements done in Volt on the same frequency but in different directions. | <math>V_{x}</math>, <math>V_{y}</math> and <math>V_{z}</math> are the measurements done in Volt on the same frequency but in different directions. | ||
| + | |||
| + | <math>S</math> is the Root-sum-square of the measured voltages. | ||
| + | |||
| + | |||
| + | <math>E_{max}=G_{max} * \sqrt{ \frac{3\eta_0}{4\pi} P_0 } </math> | ||
= Immunity = | = Immunity = | ||
Revision as of 08:42, 22 January 2009
The 61000-4-20 is the standard for the Tem cells
Emission
The Tem cell is a different and cost efficient method, compared to the OATS, to measure the emission patron of the EUT. This method does have a down side, calculation is needed to correlate the measurements done in the Tem cell to the OATS
For the emission there are 2 ways of calculation:
- multi pole model
- three voltage measurements
With the correlation the assumption is that under far field conditions the emitted power
Multi pole model
The multi pole model is currently not supported by RadiMation®
Voltage measurements: 3-Positions
Also known as the "To Radiated Power method". In this method the EUT is placed in 3 axis (x,y,z).
, and are the measurements done in Volt on the same frequency but in different directions.
is the Root-sum-square of the measured voltages.
