The loop probes (EMC-110A,B,C) are sensitive to magnetic fields. They have integrated electrostatic shields, providing isolation from common-mode signals, so these probes provide excellent repeatability.
The various loop sizes allow the user to select the optimum probe for a given frequency. The smallest loop size has the best high-frequency response and spacial resolution but lower sensitivity. The larger loop has greater sensitivity but lower frequency response and spacial resolution.
The probe tips are only 0.11"(2.8 mm) thick, allowing the probe to be inserted into seams and gaps.
The EMC-100D is a stub probe, sensitive to electric fields. With its 0.08" wide tip, it offers the highest spatial resolution. It is ideally suited to tasks such as tracking sources down to the individual pins of an IC. It does not provide common mode rejection , hence the EMC-100D sensitivity can change due to the user's grip on the probe or cable.
The EMC-101A set includes one of each probe model.
All the probes are passive and require a display instrument such as spectrum analyzer, power meter, or oscilloscope with 50-ohm input impedance and sufficient sensitivity to show the power received from the probe. The probes have practically no minimum measurable field since the resolution will depend on your display instrument. No battery or power supply is needed for the probe. The probes are single-axis so they respond to fields orthogonal to the loop or parallel to the stub.
