SRF5030T Near Field Probe
User Manual
Introduction
The SRF5030T near field probe set are magnetic field (H) and electric field (E) probes for radiated emissions EMC
pre-compliance measurements. The probes are used in the near field of sources of electromagnetic radiation.They
serve to locate and identify potential sources of interference within the building blocks of electronic assemblies.
The probes act similar as wide bandwidth antennas, picking up radiated emissions from components, PCB traces,
housing openings or gaps and from any other parts that could be emitting RF. They are usually connected to a
spectrum analyser. Scanning the probe over the surface of a PCB assembly or housing quickly identifies locations
which emit electromagnetic radiation. By changing to a probe with smaller size, the origination of the emissions can be
further narrowed down.
Additional applications are RF immunity tests by feeding a RF signal into the probe and radiating it into potentially
susceptible circuit sections: Furthermore the probes can be used in the field of repair or debugging to track down
issues in RF signal chains by contactless measurement of RF signal levels. One more application is non-invasive
measurement of RF building blocks such as modulators or oscillators. Frequency, phase noise and spectral
components can be measured in conjunction with a low noise preamplifier.
Features
Slim design for good access in between tightly spaced components
Shielded loops to avoid picking up common mode noise, insensitive to the human hand
Frequency range: 300 kHz-3 GHz, though they can be used well beyond 6 GHz
SMB connectors to avoid twisting the RF cable when scanning DUTs
Insulated with rubber coating
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Model
Characteristic
H20
H10
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Model
Characteristic
H5
E5
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Probe
Field
Resolution
Frequency
H20
H-Field
20 mm
300 kHz – 3 GHz
H10
H-Field
10 mm
300 kHz – 3 GHz
H5
H-Field
5 mm
300 kHz – 3 GHz
E5
E-Field
5 mm
300 kHz – 3 GHz
Connection
Terminal Type
SMB (M)
Cable
SMB (F) to SMA (M), 100cm
Adapter
SMA (F) to N (M)
Specifications
Spectrum analyzer settings
If the probes are used without wideband preamplifier, set the input attenuation to 0dB and turn on the internal
pre-amplifier if available on your spectrum analyzer. Furthermore you can increase the dynamic range and sensitivity
by reducing frequency span, resolution bandwidth and video bandwidth.
Warning
Do not use the EMC probes to measure devices containing DC voltages
higher than 75V or AC voltages higher than 50V
. Though the probes are
eff
insulated with solder mask, conformal coating and rubber coating, sharp
metal edges may damage the insulation and cause lethal electrical shocks!
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