ESCO Technologies ETS-Lindgren 7405 User manual

Model 7405
Near-Field Probe Set
User Manual

ii www.ets-lindgren.com

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ETS-Lindgren Inc. reserves the right to make changes to any product described
herein in order to improve function, design, or for any other reason. Nothing
contained herein shall constitute ETS-Lindgren Inc. assuming any liability
whatsoever arising out of the application or use of any product or circuit
described herein. ETS-Lindgren Inc. does not convey any license under its
patent rights or the rights of others.
© Copyright 1996–2022 by ETS-Lindgren Inc. All Rights Reserved. No part
of this document may be copied by any means without written permission
from ETS-Lindgren Inc.
Trademarks used in this document: The ETS-Lindgren logo is a trademark of
ETS-Lindgren Inc.
Revision Record | MANUAL,7405 PROBE SET | Part #399107, Rev. K
Revision Description Date
A–E
•Initial Release
•Updates / edits
February, 1996–January, 1999
F Updated Preamplifier
Gain chart; rebrand October, 2009
G
Updated
measurement and
characterization
information
May, 2013
H Added temperature
range July, 2016
J Removed references
to battery/charger January, 2019
K Warranty information
removed February, 2022

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Table of Contents
Notes, Cautions, and Warnings............................................... vi
Safety Information .................................................................... vi
1.0 Introduction .......................................................................... 7
Magnetic (H) Field Probes .......................................................................... 8
Electric (E) Field Probes ............................................................................. 8
Ball Probe ........................................................................................... 9
Stub Probe.......................................................................................... 9
Standard Configuration ............................................................................... 9
Optional Items (Sold Separately) .............................................................. 10
ETS-Lindgren Product Information Bulletin ............................................... 10
2.0 Maintenance ....................................................................... 11
Service Procedures .................................................................................. 11
3.0 Specifications..................................................................... 13
Model 7405............................................................................................... 13
Preamplifier .............................................................................................. 13
4.0 Operation ............................................................................ 15
Typical Configuration ................................................................................ 15
Probe Selection ........................................................................................ 16
Preamplifier Use ....................................................................................... 17
5.0 Typical Performance Factors ........................................... 19
Magnetic (H) Field Probes ........................................................................ 20
901 (6-cm Loop) ............................................................................... 20
902 (3-cm Loop) ............................................................................... 21
903 (1-cm Loop) ............................................................................... 22
Electric (E) Field Probes ........................................................................... 23
904 (Ball Probe)................................................................................ 23
905 (Stub Probe) .............................................................................. 24
Preamplifier Gain ...................................................................................... 25
0.01 MHz –3 GHz ............................................................................. 25
6.0 Common Diagnostic Techniques..................................... 27
Locating Radiating Sources ...................................................................... 27

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Signal Demodulation......................................................................... 29
Examples.......................................................................................... 30
Using Sniffer Probes ......................................................................... 32
Diagnosing Radiation Causes................................................................... 33
Common and Differential Mode Current Flow.................................... 35
Differential Mode Techniques............................................................ 40
Common Mode Techniques .............................................................. 42
Pre-Screening Alternate Solutions ............................................................ 43
Evaluating Alternate Solutions .......................................................... 46
Appendix A: EC Declaration of Conformity .......................... 49