Coilcraft RDL-A Test Fixture

Accurate and repeatable measurements of radial leaded

inductors and other components can be made using the Coilcraft

RDL-A fixture with many impedance measurement instruments.

Fixture Characteristics

Connector: Precision 7 mm (APC-7 compatible)

Electrical Length: 0.72 cm

Package Contents

RDL-A test fixture

Shorting bar

General Measurement Procedure

Note: For instrument-specific procedures, f ollow the instructions

supplied with the test instrument.

1. Determine the required test frequency or frequency range

from the component data sheet or specification. Verify that

the required test frequency is within the instrument frequency

range.

2. Set the instrument for the required frequency range ,

measurement parameters (e.g. L, Q, Z, θ), number of

measurement (frequency) points, and a veraging parameters .

3. Calibrate the instrument using accurate reference standards.

4. Align the connector on the RDL-A to the connector on the

test instrument.

(Continued on other side)

CAUTION: Do not ov er-tighten the connector . Ov er-tightening

can damage the center conductor .

5. F asten the 7mm connector of the test instrument onto the

RDL-A connector until snug (appro x. 3 turns).

6. Enter the electrical length to compensate f or fixture phase

dela y.

7. Make sure there is no component or shorting bar in the

fixture, and perf orm OPEN fixture compensation.

8. Place the supplied shorting bar onto the fixture. Center and

press the shorting bar into the contacts until completely

seated.

9. P erf orm SHORT fixture compensation. Remo ve the shorting

bar from the fixture.

10. Place the test component into the fixture.

11. Read the display ed value on the instrument.

References

The f ollowing application notes are av ailable on the Coilcraft

website at

www.coilcraft.com/appnotes.cfm

Test Fixture Compatibility Chart

Calibration, Compensation and Correlation

Testing Inductors at Application Frequencies

1102 Silver Lake Road Cary, Illinois 60013

Phone 847/639-6400 Fax 847/639-1469

E-mail info@coilcraft.com

Web http://www.coilcraft.com

Document 370-R Revised 10/08/03