Atec Agilent-16047A - Manual (Page 6)

When a device under test (DUT) is measured, a test fixture must be used to connect the instrument to
the DUT. A test fixture is an interface specifically designed to connect the instrument and the contact
tips of the DUT.
1. What are Agilent Accessories?
Agilent offers a variety of accessories suitable for many applications. They are designed to make mea-
surements simple and reliable. For example, a mechanically and electrically precise test fixture is
required to measure the impedance of SMD components. For this measurement, Agilent offers dedicated
SMD fixtures for impedance measurement instruments that minimize the measurement errors. Also,
specially designed fixtures for other specific applications (such as DC bias test, dielectric material test,
and others.) are available. Agilent accessories facilitate a shorter time-to-market with increased confi-
dence by providing accurate and repeatable measurements.
2. Types of Accessories
Agilent accessories can be divided into the following five categories:
Test Fixtures
A test fixture is used to hold the electronic components or materials (physically and electrically) for the
measurements. Agilent offers various kinds of 4-Terminal Pair test fixtures and 7 mm test fixtures.
Some of them connect directly to the measurement instrument, while others require adapters.
Test Leads
Test leads are used to extend the measurement ports from the UNKNOWN terminals of the instrument
to the DUT. Using a flexible test lead, a DUT that cannot be held with test fixtures can be measured
regardless of its size or shape. The test leads can also be used as cable extensions when the test sample
is located away from the measurement instrument.
Probes
Probes are helpful in measuring components which are already connected to PC boards or have one ter-
minal grounded. The probes shown in this selection guide have a wide frequency range and are simple to
use.
Adapters
Adapters are used to adapt the dedicated circuits between the instrument and the test fixtures. The
16085B is a terminal conversion adapter that can convert a 4-Terminal Pair configuration to a 7 mm
configuration. The 16065C is an external DC bias adapter that can apply DC bias to the DUT from an
external DC bias source.
Others
Also available are DC bias accessories and performance test equipment.
Introduction
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