ETS-Lindgren 6502 User manual

©EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002 REV E–PN 399058
Model 6502
Active Loop Antenna
MANUAL

MODEL 6502 ACTIVE LOOP ANTENNA
© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002
REV E –PN 399058
EMC Test Systems, L.P. reserves the right to make changes to any products herein to improve functioning,
design, or for any other reason. Nothing contained herein shall constitute EMC Test Systems, L.P.
assuming any liability whatsoever arising out of the application or use of any product or circuit described
herein. EMC Test Systems, L.P. does not convey any license under its patent rights or the rights of others.
© Copyright 2002 by EMC Test Systems, L.P. All Rights Reserved.
No part of this document may be copied by any means
without written permission from EMC Test Systems, L.P.
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[e-mail]
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USA
1301 Arrow Point Dr., Cedar Park, TX 78613
P.O. Box 80589, Austin, TX 78708-0589
Tel [phone] Fax [phone]
FINLAND
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27510, Eura, Finland
Tel [phone]
Fax [phone]
SINGAPORE
Lindgren RF Enclosures Asia-Pacific
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#06-02 Chye Sing Building
Singapore 189695
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MODEL 6502 ACTIVE LOOP ANTENNA
© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002
REV E –PN 399058
Table of Contents
INTRODUCTION.................................................................................................................................. 1
STANDARD CONFIGURATION......................................................................................................... 2
OPTIONS............................................................................................................................................... 2
MOUNTING........................................................................................................................................... 3
OPERATION......................................................................................................................................... 3
SATURATION INDICATOR ....................................................................................................................... 3
POWER INDICATOR................................................................................................................................ 3
USE OF CALIBRATION DATA.................................................................................................................. 3
TYPICAL DATA.................................................................................................................................... 4
CALIBRATION..................................................................................................................................... 5
BATTERY CHARGER.......................................................................................................................... 5
SPECIFICATIONS................................................................................................................................ 8
ELECTRICAL ......................................................................................................................................... 8
PHYSICAL ............................................................................................................................................. 8
MAINTENANCE................................................................................................................................... 9
WARRANTY........................................................................................................................................ 10
EUROPEAN COMMUNITY DECLARATION OF CONFORMITY................................................ 11

MODEL 6502 ACTIVE LOOP ANTENNA
© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002
REV E –PN 399058

MODEL 6502 ACTIVE LOOP ANTENNA Introduction
© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002 1
REV E –PN 399058
INTRODUCTION
The ETS-Lindgren Model 6502 is an Active Receiving Loop
Antenna with a frequency range of 10 kHz to 30 MHz. This
antenna is specifically designed to perform commercial emissions
standards testing. The Model 6502 can be used for any magnetic
testing, particularly MIL-STD 461B.
A radio frequency preamplifier is built into the base of this loop
antenna and provides a 50 ohm output which is used by a receiver.
The preamplifier helps the loop antenna produce good sensitivity
and almost constant antenna factors.
Power for the preamplifier is supplied by rechargeable sealed
batteries. Front panel controls and indicators for the preamplifier
include a power switch, power-on indicator and a receptacle for the
batter charger. The battery charger which is switch selectable for
115 VAC/230 VAC operation is included. The charger operates at
50 Hz/60 Hz.

Standard Configuration MODEL 6502 ACTIVE LOOP ANTENNA
2© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002
REV E –PN 399058
STANDARD CONFIGURATION
•Antenna assembly
•Mounting bracket designed to accept an ETS-Lindgren or
other tripod mount with standard ¼ in x 20 threads
•Battery Charger
•Individually calibrated per IEEE STD 291. Actual individual
calibration factors and signed Certificate of Calibration
Conformance are included.
OPTIONS
Remote Monitor: An optional remote monitor is available that
allows you to view the power and saturation indicators from up to
10m (32.8 ft) away.
Tripods: ETS-Lindgren offers two nonmetallic, non-reflective
tripods for use at both indoor and outdoor EMC test sites.
The Model 4-TR, constructed of linen phenolic and delrin, is
designed with an adjustable center post for precise height
adjustments. Maximum height for the 4-TR is 2.0 m (80.0 in),
while minimum height is 94 cm (37.0 in). This tripod can support
up to an 11.8 kg (26.0 lb) load.
The 7-TR tripod has several different configurations, including
options for manual or pneumatic polarization. This tripod provides
increased stability for physically large antennas. Its unique design
allows for quick assembly/disassembly and convenient storage.
Quick height adjustment and locking wheels provide ease of use
during testing. This tripod can support a 13.5 kg (30 lb) load. For
the 7-TR series, maximum height is 2.17 m (85.8 in), with a
minimum height of .8 m (31.8 in). The 7-TR is constructed of PVC
and fiberglass components.

MODEL 6502 ACTIVE LOOP ANTENNA Mounting
© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002 3
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MOUNTING
The Model 6502 is fitted with a mounting bracket threaded to
accept a tripod mount with standard 1/4 “ x 20 threads. To mount
the loop antenna,thread a ¼” x 20 mounting knob or fixture into
the base of the mounting bracket. Take care not to cross thread this
connection as permanent damage to the antenna mount could
occur.
OPERATION
SATURATION INDICATOR
This LED illuminates when input signal intensity exceeds the 1 dB
compression level of 5 volts per meter and stays on for about 1
second afterward.
POWER INDICATOR
This LED illuminates to show that the loop is “on” and functional.
When the charge on the battery has decreased to the point the
antenna calibration is no longer valid, the LED extinguishes. Note:
The antenna is still functioning and will provide reasonable output
signals until the batteries are exhausted.
USE OF CALIBRATION DATA
In order to calculate the field strength you must add the signal level
+ cable loss + antenna factor. The sum equals the relative field
strength. Cable loss should be measured periodically for each cable
used in testing.

Typical Data MODEL 6502 ACTIVE LOOP ANTENNA
4© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002
REV E –PN 399058
TYPICAL DATA

MODEL 6502 ACTIVE LOOP ANTENNA Calibration
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CALIBRATION
The IEEE 291-1991 Induction-Field Method of Calibration is used
on the Model 6502. By using relatively close spacing between the
transmitter and the receiver at frequencies below 30 MHz, the use
of free space magnetic induction field from a transmitting loop
antenna is most suitable. This method yields almost no reflection
from the ground or nearby objects. The value of magnetic field
produced can be expressed in terms of the equivalent free-space
electric component that would exist in a free space radiation field
because loop antennas are used both for transmitting and receiving.
BATTERY CHARGER
The Model 6502 is powered by two (2) –six (6) VDC sealed lead-
acid batteries. A battery charger is supplied with the unit. The
battery charging port on the front of the unit allows for easy
recharging of the unit. Two (2) internal fuses protect the unit from
unintentional shorting.
The EMCO brand Voltage-Selectable Battery Charger is solely
intended for charging the sealed lead-acid batteries found in
EMCO products. The battery charger is a means of providing the
necessary charge voltage and current from either a 115 or 230
VAC 50/60 Hz source.
NOTE: It is necessary to select the proper input voltage PRIOR to
connecting the battery charger to the power mains. The voltage
selection switch is located adjacent to the power input receptacle.
To maintain safety requirements, use the CSA certified power cord
provided. If it is necessary to provide other means of attaching the
battery charger to the power mains it is required that a type HD 21
(PVC cord) or type HD22 (rubber cord) with a nominal cross
section of 0.75 mm 2 be used.
The battery charger provides both fast and trickle charge operation.
Switching from one charge mode to the other is provided

Battery Charger MODEL 6502 ACTIVE LOOP ANTENNA
6© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002
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automatically by the charger. The front panel indicator marched
“Fast Charge” lights when the battery charger is in the fast charge
mode. When the “Power On” light is illuminated and the “Fast
Charge” light is extinguished, the batter charger is in the trickle
charge mode.
The antenna should be connected to the battery charger in “Trickle
Charge” mode when not in use. Charging time is approximately
eight hours when batteries are completely discharged. Note: The
antenna is not designed to operate using that Battery Charger as a
power source.
Batteries should provide power to the amplifier for approximately
16 hours before recharging is required.
The battery charger is protected against overcurrent by a 200 mA
250 VAC time-delay fuse. If it becomes necessary to replace the
fuse, use a fuse of the same type and rating to maintain safe
operations. The fuse is accessible by removing the two (2)
“Phillips” head screws on the underside of the unit. Always
remove main power before opening the house. The output of the
battery charger is protected against overcurrent conditions by use
of “fold-back” circuitry.
SPECIFICATIONS
Input voltage: 115/230 VAC selectable
Input frequency: 50/60 Hz
Input power: 20 VA max
Protection class: Class II double insulated
Input fuse rating: 200 mA time-delay type 5x20 mm
Input power connection : IEC-320 power inlet
Output voltage: 12 VDC (13.5-15 VDC)
Output current: 350 mA
Safety approvals: TUV, CSA
IMPORTANT The battery charger allows for the selection of
either 115 or 230 VAC single phase, 50 or 60 Hz. This selection
should be made prior to applying power to the battery charger.

MODEL 6502 ACTIVE LOOP ANTENNA Battery Charger
© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002 7
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There are two LED’s on the body of the separate battery charger.
The “Power On” LED illuminates when the charger is plugged into
an AC outlet. (115/230 VAC user selectable). The “Fast Charge”
LED illuminates when the battery is charging and turns off when
the battery is fully charged. Once the battery charger has
completed the “Fast Charge” cycle, the charger will automatically
switch to “Trickle Charge” mode. The antenna should be
connected to the battery charger in “Trickle Charge” model when
not in use. Charging time is approximately eight hours when
batteries are completely discharged. Note: The antenna is not
designed to operate using the Battery Charger as a power source.
Batteries should provide power to amplifier for approximately 16
hours before recharging is required.

Specifications MODEL 6502 ACTIVE LOOP ANTENNA
8© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002
REV E –PN 399058
SPECIFICATIONS
ELECTRICAL
Frequency Range 10 kHz -30 MHz
Dynamic Range 85 dB @ 10 kHz
125 dB @ 1 MHz
Sensitivity (Typical) -1 dB (uA/m) @ 10 kHz
-42 dB (uA/m) @ 1 MHz
1 dB Compression Point 5 V/m
Power Required 13.8 VDC
Impedance (Nominal) 50 ohms
Connector BNC female
PHYSICAL
Base Width 19.0 cm
7.5 in
Base Depth 12.0 cm
4.7 in
Height 67.3 cm
26.5 in
Loop Diameter 60.0 cm
23.6 in
Weight 2.0 kg
4.5 lb

MODEL 6502 ACTIVE LOOP ANTENNA Maintenance
© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002 9
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MAINTENANCE
To ensure reliable and repeatable long-term performance, annual
recalibration of your antennas by ETS-Lindgren’s experienced
technicians is recommended. Our staff can recalibrate almost any
type or brand of antenna. Please call to receive a service order
number prior to sending an antenna to us for calibration.
For more information about our calibration services or to place an
order for antenna calibration visit our calibration website at
http://www.antennacalibration.com/.

Warranty MODEL 6502 ACTIVE LOOP ANTENNA
10 © EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002
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WARRANTY
EMC Test Systems, L.P., hereinafter referred to as the Seller, warrants that standard EMCO
products are free from defect in materials and workmanship for a period of two (2) years from
date of shipment. Standard EMCO Products include the following:
vAntennas, Loops, Horns
vGTEM cells, TEM cells, Helmholtz Coils
vLISNs, PLISNs, Rejection cavities & Networks
vTowers, Turntables, Tripods & Controllers
vField Probes, Current Probes, Injection Probes
If the Buyer notifies the Seller of a defect within the warranty period, the Seller will, at the Seller’s
option, either repair and/or replace those products that prove to be defective.
There will be no charge for warranty services performed at the location the Seller designates.
The Buyer must, however, prepay inbound shipping costs and any duties or taxes. The Seller will
pay outbound shipping cost for a carrier of the Seller’s choice, exclusive of any duties or taxes. If
the Seller determines that warranty service can only be performed at the Buyer’s location, the
Buyer will not be charged for the Seller’s travel related costs.
This warranty does not apply to:
vNormal wear and tear of materials
vConsumable items such as fuses, batteries, etc.
vProducts that have been improperly installed, maintained or used
vProducts which have been operated outside the specifications
vProducts which have been modified without authorization
vCalibration of products, unless necessitated by defects
THIS WARRANTY IS EXCLUSIVE. NO OTHER WARRANTY, WRITTEN OR ORAL, IS
EXPRESSED OR IMPLIED, INCLUDING BUT NOT LMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE REMEDIES
PROVIDED BY THIS WARRANTY ARE THE BUYER’S SOLE AND EXCLUSIVE REMEDIES.
IN NO EVENT IS THE SELLER LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING
BUT NOT LIMITED TO, DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
Note: Please contact the Seller’s sales department for a Return Materials Authorization (RMA)
number before shipping equipment to us.

MODEL 6502 ACTIVE LOOP ANTENNA European Community Declaration of Conformity
© EMC TEST SYSTEMS, L.P. –SEPTEMBER 2002 11
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EUROPEAN COMMUNITY
DECLARATION OF CONFORMITY
The EC Declaration of Conformity is the method by which EMC Test Systems, L.P. declares that the
equipment listed on this document complies with the EMC and Low-voltage Directives.
Factory: Issued by:
EMC Test Systems, L.P. EMC Test Systems, L.P.
P.O. Box 80589 P.O. Box 80589
Austin, Texas USA Austin, Texas USA
78708-0589 78708-0589
The products manufactured under the EMCO product name and listed below are
eligible to bear the EC Mark:
Model 6502 Active Loop Antenna
Part Number 102615 Battery Charger
Applicable Requirements:
Standard Criteria
EN61010-1Safety requirements for electrical equipment for
measurement, control and laboratory use
EN60742/1989 Isolating transformers and safety isolating transformers
EN55022 Class B
IEC 801-2Level 2 4/8kV
IEC 801-3Level 2 3V/m
IEC 801-4Level 2 .5 I/O, 1kV AC
Authorized Signatories
___________________________ ___________________________
Bruce Butler, General Manager James C. Psencik, Engineering Mgr.
___________________________
Charles Garrison, Quality Assurance Date of Declaration: December 10, 1996
The authorizing signature on the EC Declaration of Conformity document authorizes EMC Test Systems, L.P. to affix
the CE mark to the indicated product. CE marks placed on these products will be distinct and visible. Other marks or
inscriptions liable to be confused with the CE mark will not be affixed to these products.
EMC Test Systems, L.P. has ensured that appropriate documentation shall remain available on premises for inspection
and validation purposes for a period of no less than 10 years.