ETS-Lindgren 4630 User Manual

Model 4630

Archived 3/18/10

REFRAD

Reference Radiator

MANUAL

© EMC TEST SYSTEMS, L.P. – MARCH 2002 REV F – PN 399214

LICENCED FROM:

FORSCHUNGSZENTRUM SEIBERSDORF

MODEL 4630 REFRAD REFERENCE RADIATOR

Archived 3/18/10

EMC Test Systems, 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 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 th e
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.

E-MAIL & INTERNET

[e-mail]
http://www.ets-lindgren.com

USA

1301 Arrow Point Dr., Cedar Park, TX 78613
P.O. Box 80589, Austin, TX 78708-0589
Tel [phone] Fax [phone]

FINLAND

Euroshield OY
Mekannikontie 1
27510, Eura, Finland
Tel [phone]
Fax [phone]

SINGAPORE

Lindgren RF Enclosures Asia-Pacific
87 Beach Road
#06-02 Chye Sing Building
Singapore 189695
Tel [phone] Fax [phone]

© EMC TEST SYSTEMS, L.P. – MARCH 2002
REV F – PN 399214

MODEL 4630 REFRAD REFERENCE RADIATOR

Archived 3/18/10

Table of Contents

INTRODUCTION............................................................................................................. 1

T

YPICAL USE ................................................................................................................... 1

COMB GENERATOR .......................................................................................................... 1

Operation of the Comb Generator .............................................................................. 1

Battery Charger .......................................................................................................... 2

REMOTE CONTROL UNIT .................................................................................................. 3

TECHNICAL DATA ........................................................................................................ 4

COMB GENERATOR .......................................................................................................... 4

Power Supply .............................................................................................................. 4

Output Signal – Comb Spectrum ................................................................................. 4

Remote Control ........................................................................................................... 4

Temperature Range ..................................................................................................... 4

REMOTE CONTROL ........................................................................................................... 6

Power Supply .............................................................................................................. 6

GPIB Bus .................................................................................................................... 6

GPIB Command Set .................................................................................................... 6

GPIB Examples ........................................................................................................... 7

Fiber Optic Out ........................................................................................................... 7

Temperature Range ..................................................................................................... 7

OPERATION INVENTORY .................................................................................................. 7

ACCESSORIES ................................................................................................................... 8

Transmit Antennas ...................................................................................................... 8

Tripod Mounting Accessories ..................................................................................... 8

Fiber Optic Link .......................................................................................................... 8

Coaxial Adapter .......................................................................................................... 8

Reference Cable and Attenuator ................................................................................. 8

(Not Supplied with System) ......................................................................................... 8

APPLICATIONS .............................................................................................................. 9

ITE INTERCOMPARISON .................................................................................................. 9

S

NORMALIZED SITE ATTENUATION ................................................................................... 9

SYSTEM CHECKOUT ....................................................................................................... 10

C

ABLE LOSS ................................................................................................................... 11

CHAMBER FACTOR ......................................................................................................... 11

FUNCTIONAL DESCRIPTION ................................................................................... 12

OMB GENERATOR ........................................................................................................ 12

C
R

EMOTE CONTROL UNIT ................................................................................................ 12

CERTIFICATE ............................................................................................................... 14

WARRANTY STATEMENT ........................................................................................ 15

© EMC TEST SYSTEMS, L.P. – MARCH 2002
REV F – PN 399214

MODEL 4630 REFRAD REFERENCE RADIATOR

T

Archived 3/18/10

NOTICE: This product and related documentation must be reviewed for

familiarization with safety markings and instructions before operation.

SAFETY SYMBOL DEFINITIONS

REFER TO MANUAL

When product is marked with this symbol refer to instruction manual for

!

CAUTION

GENERAL SAFETY CONSIDERATIONS

S

U

E

F

F

E

U

S

WARRANTY

FUSE

2A:250V

G P I B
G P I B
G P I B
G P I B

additional information.

HIGH VOLTAGE

Indicates the presence of hazardous voltage. Unsafe practices could
result in severe personal injury or death.

PROTECTIVE EARTH GROUND (SAFETY GROUND)

Indicates protective earth terminal. You should provide an uninterruptible
safety earth ground from the main power source to the product input
wiring terminals, power cord, or supplied power cord set.

CAUTION

Denotes a hazard. Failure to follow instructions could result in minor
personal injury and/or property damage. Included text gives proper
procedures.

BEFORE POWER IS APPLIED TO THIS INSTRUMENT, GROUND IT
PROPERLY through the protective conductor of the AC power cable to a

power source provided with protective earth contact. Any interruption of
the protective (grounding) conductor, inside or outside the instrument, or
disconnection of the protective earth terminal could result in personal
injury.

BEFORE SERVICING: CONTACT EMC TEST SYSTEMS – servicing (or
modifying) the unit by yourself may void your warranty. If you attempt to
service the unity by yourself, disconnect all electrical power before
starting. There are voltages at many points in the instrument which
could, if contacted cause personal injury. Only trained service personnel
should perform adjustments and/or service procedures upon this
instrument. Capacitors inside this instrument may still be CHARGED

even when the instrument is disconnected from its power source.

TO AVOID A SAFETY HAZARD, replace fuses with the same current

rating and type (normal blow, time delay, etc.). Order any replacement
parts direct from ETS.

TO AVOID UNDUE MECHANICAL STRESS on the GPIB I/O
CONNECTOR, limit connector stacking to no more than three cables on
one connector.

© EMC TEST SYSTEMS, L.P. – MARCH 2002
REV F – PN 399214

ONLY QUALIFIED PERSONEL should operate (or service) this
equipment.

MODEL 4630 REFRAD REFERENCE RADIATOR Introduction

Archived 3/18/10

INTRODUCTION

The EMC Test Systems Model 4630 Refrad Reference Radiator is
a precise highly stable field strength transfer standards with
selectable frequency spacings over the range of 10 kHz to 1 GHz.
The system consists of a small battery powered comb generator
with a loop and two dipole transmit antennas, a coaxial output
adapter, and a remote control unit with GPIB interface.

TYPICAL USE

1. Set up comb generator and remote control unit.

2. Connect both devices via the fiber optic cable. You may clean

the connectors with a soft lint-free cloth if necessary.

3. The comb generator has to be operated in remote mode to be

used with the remote control unit.

4. Operation by a remote computer is possible. (see the ‘Remote

Control Unit’ section)

5. The comb generator should be recharged after each use.

(battery charger with cable and power supply supplied)

COMB GENERATOR

OPERATION OF THE COMB GENERATOR

1. Plug the selected antenna elements into the balun on the comb

generator.

2. For horizontal and vertical antenna polarization, use the

supplied support base, support rod, and clamp bock for tripod
mounting.

3. Select any comb spectrum by rotating the front panel knob to

the desired setting (0.01 MHz, 1.0 MHz, or 5.0 MHz). To
transfer to the remote control unit rotate the knob to the
“REMOTE” setting.

4. To recharge the comb generator after use, put the ON/OFF

switch in the CHARGE/OFF position and insert the battery
charger output plug into the comb generator’s input socket.

© EMC TEST SYSTEMS, L.P. – MARCH 2002 1
REV F – PN 399214

Introduction MODEL 4630 REFRAD REFERENCE RADIATOR

Archived 3/18/10

REFRAD
Comb Generator

Clamp block

Rotar y sw i tch
for manua l selection
of a comb spectrum

REMOTE

or mode

1.0 MHz5.0 MHz

MODEL 4630

REFRAD COMB GENERATOR

REMOTE

0.01 MHz

F.O. INP UT

Fiber optic input
for remote control

LED
power on
indicator

Support rod

Support base

Tripod

CHARGE OFF

Battery charge r in put

/

ON

FIGURE 1. REFRAD Comb Generator
Front Panel.

Insert the battery charger output plug into the
comb generator’s input socket.
(see the following Battery Charger topic for
more information)

FIGURE 2. Tripod Mounting of REFRAD Comb Generator

BATTERY CHARGER

There is one red LED and one green LED on the body of the
separate battery charger. The “Power On” LED illuminates when
the chargers is plugged into the 20V DC power supply. Power is
supplied to the supply via the IEC 302-type power inlet. The
supplied safety-certified power cord should always be used to
maintain safe operation.

A solid red LED indicates fast charge mode. When the red LED
flashes, the charger is operating in a pre-charge mode. As the

ON / OFF switch

2 © EMC TEST SYSTEMS, L.P. – MARCH 2002

REV F – PN 399214