ETS-Lindgren 3104C User Manual
Model 3104C
Biconical Antenna
User Manual
ETS-Lindgren L.P. 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 L.P. assuming any liability
whatsoever arising out of the application or use of any product or circuit
described herein. ETS-Lindgren L.P. does not convey any license under its
patent rights or the rights of others.
© Copyright 2000–2009 by ETS-Lindgren L.P. All Rights Reserved. No part
of this document may be copied by any means without written permission
from ETS-Lindgren L.P.
Trademarks used in this document: The ETS-Lindgren logo is a trademark of
ETS-Lindgren L.P.
Revision Record | MANUAL 3104C | Part #399034, Rev. F
Revision Description Date
A–D Initial Release; updates / edits 2000–2002
E Updated Specifications September, 2002
F Updated PX branding; updated
Mounting Instructions; rebrand
ii |
February, 2009
Table of Contents
Notes, Cautions, and Warnings ................................................ v
1.0 Introduction .......................................................................... 7
Optional Items ................................................................................................ 7
Portable Elements (Model 3104CP) ...................................................... 7
Extended Portable Elements (Model 3104CPX) ................................... 8
Carrying Cases ...................................................................................... 8
Tripod Options ....................................................................................... 8
ETS-Lindgren Product Information Bulletin ................................................... 9
2.0 Maintenance ....................................................................... 11
Annual Calibration ....................................................................................... 11
Service Procedures ..................................................................................... 11
3.0 Specifications ..................................................................... 13
Electrical Specifications ............................................................................... 13
Physical Specifications ................................................................................ 13
4.0 Assembly Instructions ...................................................... 15
5.0 Mounting Instructions ....................................................... 17
Using Included Mounting Adapters on a 4-TR ............................................. 17
Additional Mounting Options ........................................................................ 19
4-TR Mounting Options........................................................................ 19
7-TR and Mast Mounting Options ........................................................ 20
2x2 Boom Mounting Options ............................................................... 21
6.0 Operation ............................................................................ 23
7.0 Typical Data ........................................................................ 25
Model 3104C Antenna Factor ...................................................................... 25
Model 3104C Gain ....................................................................................... 26
Model 3104C VSWR .................................................................................... 27
Model 3104C Half-Power Beamwidth .......................................................... 28
Model 3104C Forward Power ...................................................................... 29
@ 1 M–Derived from AF ...................................................................... 29
@ 3 M–Derived from AF ...................................................................... 30
@ 3M–Measured over Conducting Ground ......................................... 31
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Appendix A: Warranty ............................................................. 33
iv |
Notes, Cautions, and Warnings
Note: Denotes helpful information intended to
See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.
provide tips for better use of the product.
Caution: Denotes a hazard. Failure to follow
instructions could result in minor personal injury
and/or property damage. Included text gives proper
procedures.
Warning: Denotes a hazard. Failure to follow
instructions could result in SEVERE personal injury
and/or property damage. Included text gives proper
procedures.
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vi |
1.0 Introduction
The ETS-Lindgren Model 3104C Biconical Antenna is designed to operate
over the 20 MHz to 200 MHz frequency range to meet Military and Department of
Defense EMI specifications. The Model 3104C is designed and precisely
manufactured to conform to the requirements of MIL-STD-461 and other Military
Standards as reflected in Drawing ES-F-201286.
The biconical elements are made from welded aluminum. The elements mount in
a balun network fabricated of phenolic and equipped with the necessary
impedance-matching components. The lightweight construction provides easy
handling and storage.
Each antenna is individually calibrated during the manufacturing process. The
results of these calibrations are included for use in specification compliance
testing.
Optional Items
PORTABLE ELEMENTS (MODEL 3104CP)
Collapsible folding elements are available, making the Model 3104C portable and
ideal for field use. Both the standard rigid and optional folding elements attach to
the balun using screw mounts. This makes changing between the two types of
elements quick and easy.
Introduction | 7
EXTENDED PORTABLE ELEMENTS (MODEL 3104CPX)
An extended version of the portable element is available. These folding elements
are twice as long as the standard elements. The longer elements enable you to
generate high fields at low frequencies with reduced applied power.
CARRYING CASES
Carrying cases for biconical antennas and portable elements are available.
TRIPOD OPTIONS
ETS-Lindgren offers the following nonmetallic, non-reflective tripods for use at
both indoor and outdoor EMC test sites.
• 4-TR Tripod—Constructed of linen
phenolic and delrin, designed with an
adjustable center post for precise height
adjustments. Maximum height is 2.0 m
(80.0 in), and minimum height is 94 cm
(37.0 in). This tripod can support up to
an 11.8 kg (26.0 lb) load.
8 | Introduction
• 7-TR Tripod—Constructed of PVC and
fiberglass components, providing
increased stability for physically large
antennas. The unique design allows for
quick assembly, disassembly, and
convenient storage. Allows several
different configurations, including options
for manual or pneumatic polarization.
Quick height adjustment and locking
wheels provide ease of use during
testing. Maximum height is 2.17 m
(85.8 in), with a minimum height of .8 m
(31.8 in). This tripod can support a
13.5 kg (30 lb) load.
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment
for the following:
• Warranty information
• Safety, regulatory, and other product marking information
• Steps to receive your shipment
• Steps to return a component for service
• ETS-Lindgren calibration service
• ETS-Lindgren contact information
Introduction | 9
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10 | Introduction
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