Antenna Analyzer AIM4170 page 53
Appendix 9 – Component Test Fixture
The AIM4170 can be used to measure
small discrete components over a specified
frequency range. A convenient way to hold
them is with a BNC to binding post
adapter. Even though the adapter has
significant stray capacitance and
inductance, these stray parameters can be
cancelled by the calibration procedure.
The adapter shown here is from Jameco,
part number 99354, which costs about
$5.30 in the U.S.A.
(ref: www.jameco.com)
When calibrating, insert a piece of wire
between the binding posts for the short
circuit. Then remove the wire for the open
circuit. The resistor that is used can be
any 1/4W or 1/8W carbon or metal film
resistor with an accurately known value. A
resistor in the range of 50 to 500 ohms can
be used.
For testing very small surface mount
components, another adapter can be made
from a small piece of printed circuit board
material. A cut down the middle isolates
the two side. A similar cut is also made on
the back side if the printed circuit board has
copper on both sides. Two heavy wires
(#16 - #20) can be used to connect it to the
binding posts. The chip component being
tested can be held securely by pressing it
against the board with the eraser of a pencil
or a plastic screwdriver.
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