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Near Field "Sniffer" Probe Set; Model PR-261
The PR-261 is the ideal tool kit for the investigation of
RF electromagnetic fields. It is indispensable for EMI
pre-compliance testing during product development, prior
to third party testing. The set includes three hand-held
probes with a built-in pre-amplifier covering the
frequency range from 10 kHz to 1000 MHz. The set
includes one magnetic field probe, one electric field probe
and one high impedance probe. All have high sensitivity
and are matched to the 50 Ω inputs of spectrum analyzers.
The power can be supplied either from the batteries or
through a power cord directly connected to a B+K
Precision Models 2615A, 2620A, 2625 and 2630. Signal
feed is via a 1.5 meter BNC-cable. When used in conjunc-
tion with a spectrum analyzer, the probes can be used to
locate and qualify EMI sources. They are especially suited
to locate emission "hot spots" on PCBs and cables, as
well as evaluate EMC problems at the breadboard and
prototype level. They enable the user to evaluate radiated
fields and perform shield effectivity comparisons.
Mechanical screening performance and immunity tests on
cables and components are easily performed. Faulty
components and poor bonding locations can be isolated.
The magnetic probe incorporates a high degree of
rejection of both stray and direct electric fields, and
provides far greater repeatability than with conventional
field probes. Measurements can be made on the very near
field area that is close to components or radiation sources.
The electric field (monopole) probe has the highest
sensitivity of all three probes. It can be used to check
screening and perform pre-compliance testing on a
comparative basis. The high impedance probe is used to
measure directly on the components under test or at the
conductive trace of a PC board. It has an input
capacitance of only 2 pF and supplies virtually no
electrical charge to the device under test.
Probe Set Specifications
All probes are electrically shielded and are supplied in a
carrying case.
Frequency range: 100 kHz–1,2GHz
Power supply: 6V from Spectrum Analyzers or Batteries
Operating current: 10-15 mA
Probe dimensions: 40 x 19 x 195 mm (approx.)
OPTIONAL ACCESSORIES
6
Antenna Kit; Model AN-18
Broad band antenna is useful for radiated signal
measurement.
Deluxe Carrying Case; Model LC-210
Rugged cordura carrying case is foam padded for
instrument protection, has zipped pockets for manual and
accessories, and includes web hand strap and shoulder
strap.
50-ohm to 75-ohm Matching Network;
Model ZTF-1
Most RF networks (except cable TV) have an impedance
of 50 ohms. The spectrum analyzers also have a 50 ohm
input impedance, which allows direct connection. Cable
TV networks have an impedance of 75 ohms. To use the
spectrum analyzer with 75 ohm networks, Model ZTF-1
will match the 75 ohm network to the 50 ohm input
impedance of the spectrum analyzer.
50-ohm Feedthru Termination; Model TE-26
The output levels of the tracking generator of the Models
2620 and 2630 are correct only when terminated into 50
ohms. The Model TE-26 provides a 50 ohm termination
and a BNC feedthru connection so that the tracking
generator output may be fed into high impedance circuit
at a calibrated level.
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