L3Harris narda PMM EP-600 User Manual page 30

2.5 Probe support
2.6 Coupling between
probe and conductive
surfaces
2.7 Coupling between
probe and operator's
body
2.8 Multiple sources
2-2 Operation
The conical holder and the extension fiber optic FO-EP600/10 are essential
for proper operation. The optional tripod PMM TR-02 is highly
recommended for positioning the EP-600/601/602/603/604 at the required
height and distance.
To clean the equipment use only dust-free, non-abrasive dry cloths.
Use fiber optics and optical converters supplied by PMM-Narda for
this specific device and indicated in this user's manual.
In case optic parts non described in this user's manual are used
communication problems could occur.
Close proximity of the probe to conductive surfaces can cause direct
coupling (capacitive or inductive) with the field sensing dipoles.
Additional measurement uncertainty due to coupling can be limited to 1dB
by respecting these minimum distances between the probe and any
conductive surface:
• 250 mm, for frequencies 100 kHz - 3 MHz
• 150 mm, for frequencies 3 MHz - 10 MHz
• 100 mm, for frequencies > 10 MHz
Accuracy characteristics are referred to non-perturbed electric fields.
Always use a fiber optic extension of proper length to keep the probe far
away from operator's body.
Measuring complex electromagnetic fields as produced by multiple RF
sources of different frequencies does require isotropic and broadband field
probes, as well as fiber optic connections to eliminate errors due to
scattering and pick-up effects. PMM EP-600/601/602/603/604 perfectly
meets these requirements.