ETS-Lindgren 5411 GTEM! Test Cell User Manual
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GTEM! Use
5. Rotate the EUT through further 90-degree rotations to the right, such that
the y-axis is replaced by the z-axis, and so on, as shown in Typical EUT
System Installed in Large GTEM! (Additional 90
°
Rotation) on page 45.
6. Measure the RF voltages emanating from the EUT as a function of
frequency over the desired frequency range. These measurements are
referred to as V
zxy
versus frequency.
The detector selected (peak, quasi peak, or average) must be used for all
three-position measurements and the frequency of the measurements must be
the same for all positions.
After completion of these measurements, the tester should have a matrix of
measurements that consists of a frequency and three associated RF voltage
measurements all made with the same detector function. A value for the noise
measured at a given frequency where signal components were measured may
be necessary to complete the measurement set.
To assist with the computation, you may download an MS-DOS®-based utility
program from the ETS-Lindgren website a
his type of
program should be used because the computations are too complex to be
performed by hand in a reasonable amount of time.