Bird 4421 Thruline RF Power Meter BIRD_4421

User Manual: BIRD_4421

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INSTRUCTION BOOK
THRULINE® RF POWER METER MODEL 4421
AND
THRULINE® DIRECTIONAL
RF POWER SENSORS
4020 SERIES, 4027A SERIES,
4027F SERIES, AND 4028 SERIES
Bird® Electronic Corporation
30303 Aurora Road
Cleveland (Solon), Ohio 44139
Sales & Technical Support: 440-248-1200
866-695-4569 toll free
Sales email: sales@bird-technologies.com
Technical Support email: techsupport@bird-technologies.com
©Copyright 2011 by Bird Electronic Corporation
Instruction Book Part Number 920-4421 Rev U
Thruline® is a Registered Trademark
of Bird Electronic Corporation
iii
Safety Precautions
The following are general safety precautions that are not necessarily related to
any specific part or procedure, and do not necessarily appear elsewhere in this
publication. These precautions must be thoroughly understood and apply to all
phases of operation and maintenance.
Safety Symbols
The caution symbol appears on the equipment indicating there is
important information in the instruction manual regarding that
particular area.
Note: Calls attention to supplemental information.
WARNING
Keep Away From Live Circuits
Operating Personnel must at all times observe general safety precautions.
Do not replace components or make adjustments to the inside of the test
equipment with the high voltage supply turned on. To avoid casualties,
always remove power.
WARNING
Shock Hazard
Do not attempt to remove the RF transmission line while RF power is present.
WARNING
Do Not Service Or Adjust Alone
Under no circumstances should any person reach into an enclosure for the
purpose of service or adjustment of equipment except in the presence of
someone who is capable of rendering aid.
WARNING
Safety Earth Ground
An uniterruptible earth safety ground must be supplied from the main
power source to test instruments. Grounding one conductor of a two
conductor power cable is not sufficient protection. Serious injury or death
can occur if this grounding is not properly supplied.
WARNING
Chemical Hazard
Dry cleaning solvents for cleaning parts may be potentially dangerous. Avoid
inhalation of fumes or prolonged contact with skin.
WARNING
Resuscitation
Personnel working with or near high voltages should be familiar with
modern methods of resuscitation.
WARNING
Remove Power
Observe general safety precautions. Do not open the instrument with the power on.
WARNING
Warning notes call attention to a procedure which, if not correctly
performed, could result in personal injury.
CAUTION
Caution notes call attention to a procedure which, if not correctly performed,
could result in damage to the instrument.
iv
Warning Statements
The following safety warnings appear in the text where there is danger to
operating and maintenance personnel and are repeated here for emphasis.
Refer to page 5, 35, and 41.
Refer to page 35, 38, 39, and 41.
Refer to page 40.
Refer to page 41.
Caution Statements
The following equipment cautions appear in the text whenever the equipment
is in danger of damage and are repeated here for emphasis.
Refer to page 2, 41, 43, 45, and 49.
Refer to page 5 and 41.
Refer to page 5.
WARNING
Never attempt to connect or disconnect RF equipment from the transmission line
while RF power is being applied. Leaking RF energy is a potential health hazard.
WARNING
To avoid personal injury, disconnect the power cord from the AC line before
performing any maintenance, including fuse replacement or changing the
line voltage setting.
WARNING
Use only Nickel Metal Hydride (NiMH) batteries that have a minimum
capacity of 4500 milliamper hours (mAh). Do not install batteries that are
not Nickel Metal Hydride. Do not install NiMH batteries that have less than
4500 mAh capacity. Failure to comply may result in damage to the batteries,
damage to the instrument, and injury to personnel from battery chemicals.
WARNING
Heavy load. Do not attempt to lift unaided.
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
CAUTION
The Bird 4421 must be powered off when connecting or disconnecting the
power sensor from the power meter.
CAUTION
Do not use the power sensor with a load VSWR greater then 2:1. Damage to
the power meter, power sensor, or the RF power source could occur.
v
Refer to page 7
Refer to page 11 and 16.
Refer to page 35 and 41.
Refer to page 39.
CAUTION
Long-term storage of this instrument can affect battery performance and
reduce battery life. Do not store the instrument for long periods of time
without recharging the batteries (refer to page 40). Failure to comply may
result in reduced battery charge and shortened battery life.
CAUTION
During remote operation, periodically monitor the bus service request line.
Failure to detect a service request could result in equipment damage.
CAUTION
Due to the complexity of the Bird Power Sensor, field repairs beyond general
maintenance should not be attempted. Removal or disturbance of the power
sensor cover can result in cancellation of lifetime warranty.
CAUTION
Failure to install the properly rated fuse may result in equipment damage or
nuisance failures.
vi
Safety Statements
USAGE
ANY USE OF THIS INSTRUMENT IN A MANNER NOT SPECIFIED
BY THE MANUFACTURER MAY IMPAIR THE INSTRUMENT’S
SAFETY PROTECTION.
USO
EL USO DE ESTE INSTRUMENTO DE MANERA NO
ESPECIFICADA POR EL FABRICANTE, PUEDE ANULAR LA
PROTECCIÓN DE SEGURIDAD DEL INSTRUMENTO.
BENUTZUNG
WIRD DAS GERÄT AUF ANDERE WEISE VERWENDET ALS VOM
HERSTELLER BESCHRIEBEN, KANN DIE GERÄTESICHERHEIT
BEEINTRÄCHTIGT WERDEN.
UTILISATION
TOUTE UTILISATION DE CET INSTRUMENT QUI N’EST PAS
EXPLICITEMENT PRÉVUE PAR LE FABRICANT PEUT
ENDOMMAGER LE DISPOSITIF DE PROTECTION DE
L’INSTRUMENT.
IMPRIEGO
QUALORA QUESTO STRUMENTO VENISSE UTILIZZATO IN
MODO DIVERSO DA COME SPECIFICATO DAL PRODUTTORE LA
PROZIONE DI SICUREZZA POTREBBE VENIRNE
COMPROMESSA.
vii
SERVICE
SERVICING INSTRUCTIONS ARE FOR USE BY SERVICE-
TRAINED PERSONNEL ONLY. TO AVOID DANGEROUS
ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING UNLESS
QUALIFIED TO DO SO.
SERVICIO
LAS INSTRUCCIONES DE SERVICIO SON PARA USO
EXCLUSIVO DEL PERSONAL DE SERVICIO CAPACITADO. PARA
EVITAR EL PELIGRO DE DESCARGAS ELÉCTRICAS, NO
REALICE NINGÚN SERVICIO A MENOS QUE ESTÉ CAPACITADO
PARA HACERIO.
WARTUNG
ANWEISUNGEN FÜR DIE WARTUNG DES GERÄTES GELTEN
NUR FÜR GESCHULTES FACHPERSONAL.
ZUR VERMEIDUNG GEFÄHRLICHE, ELEKTRISCHE SCHOCKS,
SID WARTUNGSARBEITEN AUSSCHLIEßLICH VON
QUALIFIZIERTEM SERVICEPERSONAL DURCHZUFÜHREN.
ENTRENTIEN
L’EMPLOI DES INSTRUCTIONS D’ENTRETIEN DOIT ÊTRE
RÉSERVÉ AU PERSONNEL FORMÉ AUX OPÉRATIONS
D’ENTRETIEN. POUR PRÉVENIR UN CHOC ÉLECTRIQUE
DANGEREUX, NE PAS EFFECTUER D’ENTRETIEN SI L’ON N’A
PAS ÉTÉ QUALIFIÉ POUR CE FAIRE.
ASSISTENZA TECNICA
LE ISTRUZIONI RELATIVE ALL’ASSISTENZA SONO PREVISTE
ESCLUSIVAMENTE PER IL PERSONALE OPPORTUNAMENTE
ADDESTRATO. PER EVITARE PERICOLOSE SCOSSE
ELETTRICHE NON EFFETTUARRE ALCUNA RIPARAZIONE A
MENO CHE QUALIFICATI A FARLA.
viii
UNITS ARE EQUIPPED WITH RECHAREABLE BATTERIES. THESE ARE TO
BE REPLACED BY AUTHORIZED SERVICE PERSONNEL ONLY!!!
LAS UNIDADES VIENEN EQUIPADAS CON BATERIAS RECARGABLES. ¡¡¡Y
SOLAMENTE EL PERSONAL DE SERVICIO AUTORIZADO PUEDE
REEMPLAZARLAS!!!
GERÄTE SIND MIT WIEDER AUFLADBAREN BATTERIEN BESTÜCKT.
BATTERIEN SIND NUR VON QUALIFIZIERTEM SERICE PERSONAL
AUSZUWECHSELN!!!
CES DISPOSITIFS SONT ÉQUIPÉS DE BATTERIES RECHARGEABLES.
SEUL LE PERSONNEL D’ENTRETIEN AUTORISÉ EST HABILITÉ À LES
REMPLACER !
LE UNITÀ SONO DOTATE DI BATTERIE RICARICABILI, CHE DEVONO DA
COME SPECIFICATO DAL PRODUTTORE LA PROTEZIONE DI SICUREZZA
POTREBBE VENIRNE COMPROMESSA.
ix
BE SURE THE 115/230V AC VOLTAGE SELECTOR IS SET TO THE PROPER
LINE VOLTAGE, AND THE CORRECT AC LINE FUSE IS INSTALLED BEFORE
AC POWER IS APPLIED.
S’ASSURER QUE LE SÉLECTEUR DE TENSION 115/230V C.A. EST BIEN
RÉGLÉ POUR LA TENSION DU RÉSEAU ET QUE LE FUSIBLE DE LIGNE
C.A. CORRECT EST EN PLACE AVANT DE METTRE SOUS TENSION C.A.
CERCIORESE QUE EL SELECTOR DE VOLTAJE DE 115/230V CA ESTE
COLOCADO A LA LINEA DE VOLTAJE APROPIADA Y QUE EL FUSIBLE
ESTE INSTALADO A LA LINEA CA ANTES DE APLICAR LA CORRIENTE
ALTERNA.
VOR EINSCHALTEN DER WECHSELSTROMZUFUHR SICHERSTELLEN,
DASS DER 115/230V WECHSELSPANNUNGS-SELEKTOR AUF DIE
VORSCHRIFTSMÄSSIGE LEITUNGSSPANNUNG EINGESTELLT UND DIE
RICHTIGE WECHSELSTROM-HAUPTSICHERUNG EINGESETZT IST.
PRIMA DI EROGARE CORRENTE, ASSICURARSI CHE IL SELETTORE DI
VOLTAGGIO 115/230 V.C.A. SIA REGOLATO CORRETTAMENTE E CHE IL
FUSIBLE ADATTO ALLA LINEA DI ALIMENTAZIONE C.A. SIA INSTALLATO.
x
About This Manual
This manual covers the Bird 4421 RF Power Meter and the its sensors. This man-
ual covers the operating and maintenance instructions for the following models:
Changes to this Manual
We have made every effort to ensure this manual is accurate. If you should
discover any errors, or if you have suggestions for improving this manual,
please send your comments to our factory. This manual may be periodically
updated. When inquiring about updates to this manual refer to the part num-
ber and revision level on the title page.
Contents
Chapter Layout
Introduction - Describes the purpose and function of the Power Meter as well
as a general overview of the product.
Installation - Describes the installation instructions for the power meter models
covered in this manual.
Operating Instructions - Describes the features of the power meters and pro-
vides power-up instructions.
IEEE-488 GPIB Interface - Describes the features of the IEEE-488 GPIB Inter-
face.
RS-232 Interface - Describes the features of the RS-232 Interface.
Maintenance - Contains preventative maintenance information, troubleshoot-
ing section, and a list of replacement parts with part numbers.
Power Meter 4421
4020 Series
Sensors
4021402240244025
4027A Series
Sensors
4027A250K 4027A400K 4027A800K 4027A2M
4027A4M 4027A10M 4027A12M 4027A25M
4027A35M 4027A60M 4027A100M 4027A150M
4027F Series
Sensors
4027F2M 4027F10M 4027F60M
4028A Series
Sensors
4028A250K 4028A400K 4028A2M 4028A3M
4028A4M 4028A10M 4028A25M
4028B Series
Sensors
4028B10M 4028B3M
4028C Series
Sensors
4028C10M
xi
Table of Contents
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Warning Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Caution Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Safety Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x
Changes to this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Chapter Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Items Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Power Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4020 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4027A Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4027F Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4028 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Frequency and Power Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4020 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4027A Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4027F Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4028 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Sensor Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RF Line Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Panel Mounting the 4421 Power Meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Handle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
115/230V AC Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
AC Line Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 3 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Push Button Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Audible Warning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 4 IEEE-488 GPIB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Cable Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Interface Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Dip Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Talker-Only Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Command Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
General Bus Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Device Dependent Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
xii
Chapter 5 RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Cable Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Auto Baud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Talker-Only Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Command Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
General Bus Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Device Dependent Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Chapter 6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Functional Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Push Button Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Front Panel (Cal Cart only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Cord Reel (Cal Cart only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Replacing Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Replacing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Long Term Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Power Sensor (Cal Cart only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Casters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Storage and Shipment (Cal Cart only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Specifications, Cal Cart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Max. Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Specifications, 4421 Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Specifications, Power Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Specifications, RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Specifications, IEEE-488 GPIB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
1
Chapter 1 Introduction
Power Meter
The Bird 4421 RF Power Meter is one component of a complete RF power mea-
surement system. An RF power sensor such as a Bird 4021 is also required.
The system can be controlled with the front panel buttons, or remotely
through an RS-232 connection or a GPIB-488 connection.
Items Supplied
zBird 4421 RF Power Meter
zAC Power Cord
zSensor Cable
zInstruction Manual
Optional Accessories
Panel Mount Kit (P/N 4421-250) - Allows the Bird 4421 to be installed in a
standard 19" panel for rack mount applications.
Null Modem Kit (P/N 4380-250) - Contains the hardware necessary to allow
the 4421 to be remotely controlled by controllers with different wiring
arrangements. Requires an RS-232 interface module.
Figure 1 Bird 4421 Meter Outline Drawing
REMOVE AC POWER BEFORE
ATTEMPTING TO SERVICE THIS
INSTRUMENT
VOLTAGE 115/230 V
FUSE RATING T630mA/T315mA
FREQUENCY 50/60 Hz
MAXIMUM POWER 60W
AC SUPPLY
ON
O OFF
I
POWER
SENSOR
REAR
6
789
10
13
12
11
12-1/4” (312 mm)
45
SIDE
10-1/8” (257 mm)
4-1/4”
(108 mm)
123
FRONT
MODEL 4421 RF POWER METER
AUTO
RANGE
UP
DOWN
SWRRFLFWD MIN MAX dBm LIGHT ON / OFF
Bird 4421 RF Power Meter
2
Power Sensors
Power sensors are available with a variety of connectors; see "Available Con-
nectors" on page 49 for a complete list. Since the accuracy is critically depen-
dent on the connectors used at calibration, do not remove or change the
connectors.
4020 Series
Bird 4020 Series Power Sensors are designed for lab or field use and are accu-
rate to within ±3%(1σ) of reading.
4027A Series
Bird 4027A Series Power Sensors are designed for use in semiconductor pro-
cessing and calibration applications. Stringent calibration provides long-term
unit-to-unit repeatability, allowing consistent amounts of RF energy to be
applied to the etch process over many etch cycles. 4027A Sensors are accurate
to ±1%(1σ) at specified calibration frequencies and power levels.
4027F Series
Bird 4027F Series Power Sensors are similar to the 4027A series. However,
additional filtering allows the 4027F to ignore harmonics of the signal being
measured. The 4027F is also less sensitive to AM components of the signal.
4027F Sensors are accurate to ±1%(2σ) at specified calibration frequencies
and power levels.
Figure 2 Power Sensor Outline Drawing, 4020, 4027A, 4027F, & 4028A Series
4028 Series
Bird 4028 Series Power Sensors are high power sensors otherwise similar to
the 4027A series. 4028A sensors are based on a 7/8” line, 4028B sensors use a
1-5/8” line, and 4028C sensors use a 3-1/8” line. 4028 Sensors are accurate to
±2% at specified calibration frequencies and power levels.
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
DIRECTIONAL POWER SENSOR
MODEL 4022
0.3 - 1000 WATTS
25 - 1000 MHz
3-3/4”
(95 mm)
3/4”
(19 mm)
1-3/8”
(35 mm)
2-1/2”
(64 mm)
3-1/4”
(83 mm)
-CAUTION-
SOURCE LOAD
SENSOR PLUG
SOCKET
Introduction
3
Figure 3 Power Sensor Outline Drawing 4028B Series only
Figure 4 Power Sensor Outline Drawing 4028C Series only
SENSOR PLUG
SOCKET
3.75"
(96 mm)
4.75"
(121 mm)
3.5"
(89 mm)
6.75"
(172 mm)
SOURCE LOAD
Bird 4421 RF Power Meter
4
Frequency and Power Ranges
4020 Series
4027A Series
4027F Series
4028 Series
Model Frequency Range RF Power Range
4021 1.8 – 32 MHz 300 mW – 1 kW
4022 25 – 1000 MHz 300 mW – 1 kW
4024 1.5 – 32 MHz 3 W – 10 kW
4025 100 kHz – 2.5 MHz 3 W – 10 kW
Model Frequency Range RF Power Range
4027A250K 250 – 400 kHz 3 W – 10 kW
4027A400K 400 – 550 kHz 3 W – 10 kW
4027A800K 800 – 950 kHz 3 W – 10 kW
4027A2M 1.5 – 2.5 MHz 3 W – 10 kW
4027A4M 3 – 5 MHz 3 W – 10 kW
4027A10M 10 – 15 MHz 3 W – 10 kW
4027A12M 10 – 15 MHz 300 mW – 1 kW
4027A25M 25 – 30 MHz 3 W – 9 kW
4027A35M 35 – 45 MHz 3 W – 7.5 kW
4027A60M 45 – 65 MHz 3 W – 6 kW
4027A100M 95 – 105 MHz 3 W – 4 kW
4027A150M 150 – 170 MHz 3.75 W – 3.75kW
Model Frequency Range RF Power Range
4027F2M 1.8 – 2.2 MHz 100 W – 10 kW
4027F10M 12 – 15 MHz 3 W – 4 kW
4027F60M 57 – 63 MHz 3.75 W – 3.75 kW
Model Frequency Range RF Power Range
4028A250K 250 – 400 kHz 1 kW – 20 kW
4028A400K 400 – 550 kHz 1 kW – 20 kW
4028A2M 1.5 – 2.5 MHz 1 kW – 25 kW
4028A3M 2.5 – 3.5 MHz 1 kW – 25 kW
4028A4M 3.5 – 4.5 MHz 1 kW – 25 kW
4028A10M 10 – 15 MHz 1 kW – 25 kW
4028A25M 25 – 30 MHz 1 kW – 25 kW
4028B3M 2.5 – 4 MHz 1 kW – 25 kW
4028B10M 10 – 15 MHz 1 kW – 25 kW
4028C10M 10 – 15 MHz 500W – 50 kW
5
Chapter 2 Installation
This chapter provides information about preparing the Bird 4421 for use.
Sensor Connection
1. Turn OFF the ON/OFF rocker switch on the meter’s rear panel.
2. Align the latch on the cable with the notch of the “Power Sensor” socket on
the power meters rear panel.
3. Insert the cable until it clicks into place.
4. Connect the other end of the sensor cable to the sensor.
RF Line Connection
Connect the end of the power sensor labeled “SOURCE” to the RF source. Con-
nect the end labeled “LOAD” to the load or antenna. Reversing these connec-
tions will cause measurement errors.
Panel Mounting the 4421 Power Meter
You can install the 4421 Power Meter in an equipment rack if you have the
optional panel mount kit (refer to Optional Accessories, page 1). The panel
mount kit includes complete installation instructions. Figure shows the over-
all dimensions and mounting points for a 4421 Power Meter installed in a
panel mount kit.
Note: The power supply interrupt switch for the 4421 Power Meter
is located on the rear panel. When you install a unit in a panel mount
kit, you need to provide a means to interrupt the power supply that is
easily accessible to the user (such as a switch mounted in the panel).
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
CAUTION
The Bird 4421 must be powered off when connecting or disconnecting the
power sensor from the power meter.
WARNING
Never attempt to connect or disconnect RF equipment from the transmission
line while RF power is being applied.
Leaking RF energy is a potential health hazard.
CAUTION
Do not use the power sensor with a load VSWR greater then 2:1. Damage to
the power meter, power sensor, or the RF power source could occur.
Bird 4421 RF Power Meter
6
Figure 5 Panel Mounting Dimensions
Handle Operation
The handle on the Bird 4421 can be set to four different positions (see
Figure 6). To adjust the handle, press the center buttons on both sides.
Releasing the buttons will lock the handle into position.
Figure 6 Handle Positions
115/230V AC Input Power
The internal power supply can operate at 115 VAC or 230 VAC. There is no
user setting to select the input voltage because the power supply automati-
cally senses the input voltage. However, you must make sure that you have
the correct power cord plug and fuses installed for the line voltage you are
using (refer to Replacing Fuses, page 39).
AC Line Connectors
To make the AC line cord compatible with non-U.S. voltages, users must
install the appropriate connector on the power cord.
RF POWER METER
dBmMAX LIGHTSWRMINRFL
4421
FWD
SENSOR
POWER
178 - 264 VAC
VOLTAGE
100 - 132 VAC
AT 47.5 - 66 Hz
MAXIMUM POWER 15W
REMOVE AC POWER BEFORE ATTEMPTING
TO SERVICE THIS INSTRUMENT.
W A R N I N G
T .125A, 250V
T .250A, 250V
FUSE
AC SUPPLY
O OFF
FUSE I ON POWER
SENSOR
Installation
7
Batteries
The Bird 4421 RF Power Meter is completely portable and is powered from
internal rechargable nickel metal hydride batteries.
The batteries are shipped in a low charge state. It is, therefore, recommended
that you chrage the instrument for approximately 28 hours before using it for
continous operation.
Note: Battery charging at temperatures greater than 45° C (113°
F) can result in reduced operational time.
CAUTION
Long-term storage of this instrument can affect battery performance and
reduce battery life. Do not store the instrument for long periods of time
without recharging the batteries (refer to page 40). Failure to comply may
result in reduced battery charge and shortened battery life.
9
Chapter 3 Operating Instructions
This chapter describes operator controls and indicators on the Bird 4421 RF
Power Meter. For remote operation using a GPIB or RS-232 controller, refer to
the instructions in Chapter 4 or Chapter 5 respectively.
Push Button Functions
Figure 7 Push Buttons
Push Button Description
FWD, RFL Press to measure forward or reflected RF power. FWD or RFL
indicator and current unit of measure turn on.
SWR Press to measure standing wave ratio. SWR indicator turns on. Value
displayed will be between 1.0 and 199.9
MIN, MAX Used after pressing FWD, RFL, SWR, or dBm. Displays the minimum
(maximum) measured value of the previous function as long as MIN
(MAX) is held down.
dBm Used after pressing FWD or RFL. dBm indicator turns on. Power is
displayed in dBm units.
Note: Used after pressing SWR. Return loss is displayed.
LIGHT Press to turn on or turn off the display’s backlight. If left on, the light
automatically shuts off after 30 minutes.
AUTO Press to automatically set the scale. AUTO turns on.
UP, DOWN Press to select the next higher (lower) scale. If the scale is too high for
the power sensor, an error will be displayed.
Note: Used while AUTO indicator is on. Stops automatic
scaling. AUTO indicator turns off.
ON/OFF Press to turn the power meter on or off. This switch will not work if the
master power switch on the rear panel is OFF.
Note: The display flashes for about 30 seconds when the
unit is first turned on.
LISTEN TALK LOCAL LOCKOUT
FWD
AUTO
LO BAT
REMOTE
MODEL 4421 RF POWER METER
AUTO
RANGE
UP
DOWN
SWRRFLFWD MIN MAX dBm LIGHT ON / OFF
MW nW
KW µW
W mW
dBm
FWD
RFL
SWR
Bird 4421 RF Power Meter
10
Error Codes
The Bird 4421 displays error codes when the RF power is either below the
selected range (underrange) or above the selected range (overrange). Table 4-1
displays the error codes and Table 4-2 lists the function limits.
Table 4-1 Error Codes
Table 4-2 Function Limits
Audible Warning
If the RF power level exceeds 120% of the power sensor’s maximum power
capability, the power meter will sound a warning buzzer.
Symbol Explanation
Value greater than overrange limit of function
Value less than underrange limit of function
Function Limit Error
FWD, RFL Power > 199.9% of full scale or 120% of
top range
Overrange
FWD dBm, RFL dBm Power > 120% of full scale Overrange
Power < 3% of low range Underrange
SWR FWD < 20% of low range Underrange
FWD – RFL = 0 Overrange
Return Loss FWD < 20% of low range Underrange
RFL < 20% of low range Underrange
Return Loss > 40 dB Underrange
11
Chapter 4 IEEE-488 GPIB Interface
This chapter discusses setup of the IEEE-488 interface feature and describes
the IEEE commands that apply to the Bird 4421. Operators should under-
stand IEEE standard 488-1978 and have basic computer programming skills
before attempting to write any programs.
Description
The Bird 4421 IEEE-488 (GPIB) interface has an eight-position DIP switch
that sets operational conditions and interface addresses. The bottom line of
the display indicates the current bus status.
Cable Connector
The interface uses a standard IEEE-488 cable connector. Pin assignments are
listed in Table 5-3.
Table 5-3 IEEE-488 Pin Assignments
CAUTION
During remote operation, periodically monitor the bus
service request line. Failure to detect a service request
could result in equipment damage.
Pin Designation Type
1 D101 Data
2 D102 Data
3 D103 Data
4 D104 Data
5 EOI Management
6 DAV Handshake
7 NRFD Handshake
8 NDAC Handshake
9 IFC Management
10 SRQ Management
11 ATN Management
12 SHIELD Ground
13 D105 Data
14 D106 Data
15 D107 Data
16 D108 Data
17 REN Management
18 GROUND Ground
19 GROUND Ground
20 GROUND Ground
21 GROUND Ground
22 GROUND Ground
23 GROUND Ground
24 GROUND, LOGIC Ground
Bird 4421 RF Power Meter
12
Interface Capabilities
Table 5-4 IEEE-488 Interface Module Capabilities
Indicators
The bottom line of the power meter’s display shows indicators describing the
status of the Bird 4421 when used with the IEEE interface. These are:
REMOTE - When REMOTE is displayed, the power meter is being controlled
through the interface. Measurements, units of measure, and certain other
parameters may be changed from a remote location.
LISTEN - When LISTEN is displayed, the power meter is receiving data.
TALK - When TALK is displayed, the power meter is transmitting data. This
is always shown when the unit is in “talker-only” mode.
LOCAL LOCKOUT - When LOCAL LOCKOUT is displayed, the push buttons
are disabled and the power meter’s functions are being remotely controlled.
Setup
Dip Switch
Set the interface to ADDR (Addressable) by positioning DIP switch 1 to ON.
This makes the 4421 respond to controller commands.
Note: There are several button styles on DIP switches (slide, rocker,
lever). Examine the DIP switch to determine the ON and OFF positions.
Set the primary address using the DIP switches. The primary address is fac-
tory set to 6, but can be set to any value between 1 and 31 (0 is reserved for
the controller) To set the primary address, turn OFF switches 4 – 8 so that the
sum of the bits turned off equals the desired primary address. In Figure 8
below, the address is set to 6 (the off switches have values of 4 and 2).
Figure 8 IEEE Interface Default DIP Switch Settings
Code Name Description
SH1 Source Handshake Can handshake data or command bytes when the unit is
acting as a source.
AH1 Acceptor Can handshake the bus when it is acting as the acceptor of
data or commands.
T5 Talker Can send data over the bus to other devices. This capability
exists only after the instrument has been addressed to talk, or
after a reading in talk-only mode.
L4 Listener Can receive device-dependent data over the bus. This capability
exists only after the unit has been addressed to listen.
SR1 Service Request Can request service from the controller.
RL1 Remote-Local Can be placed in remote or local mode.
PP0 Parallel Poll Does not have parallel polling capability.
DC1 Device Clear Can be reset to factory settings.
DT1 Device Trigger Can have its readings triggered.
C0 Controller Does not have controller capability.
E1 Bus Driver Type Has open-collector bus drivers.
TE0 Extended Talker Does not have extended talker capability.
LE0 Extended Listener Does not have extended listener capability.
Note: The primary address is used by the
controller to refer to specific devices on the bus.
When programming the controller, the address in
the program must be the same as the address set
on the interface module. Each device on the bus
must have a different primary address.
IEEE-488 GPIB Interface
13
Talker-Only Mode
The Bird 4421 can be set up for manual operation while automatically sending
data to an output device (Talker-Only Mode). To do so, turn DIP switch 1 OFF
and cycle the power. TALK will be displayed.
In Talker-Only mode, pressing a button on the meter triggers a measurement.
When the measurement is complete, the information is sent to the bus and
LISTEN turns on momentarily. A listen-only device on the bus, such as a
printer, can read the value. The power meter is then ready to accept another
button press.
Command Syntax
The Bird 4421 accepts two types of commands. General bus commands are
commands, such as Device Clear (DCL), that apply to any IEEE interfaced
device. Device-dependent commands are specific to the 4421.
If an invalid command is sent to the unit, an error condition is placed in the
serial poll byte and the offending command is not executed.
A group of device-dependent commands can be sent as a single string as long
as like command categories are not repeated, for example: “PNFCFDT3TRG”.
This string sets up the 4421 to send no prefixes, read forward dBm, make one
reading on “TRG”, and triggers a measurement.
Note: Commands can be entered in either upper or lower case.
Note: Only the last command entered of each category will be exe-
cuted. As a command string is processed by the 4421, each category of
command is stored in a separate location. Two commands of the same
category will be stored in the same location, so that the second will
overwrite and erase the first one.
General Bus Commands
The general bus commands supported by the IEEE-488 interface feature are
listed in Figure 5-5. The syntax for executing general commands varies among
controllers; check the documentation supplied with your controller for the
proper command structure.
Table 5-5 IEEE-488 General Bus Commands
Command Effect on Bird 4421
IDN? Gives product identification
REN Goes into remote mode when next addressed
GTL Cancels remote mode, restores local operation
LLO Locks out local operation
IFC Goes into talker and listener-idle status
DCL Returns to default conditions
SDC Returns to default conditions
GET Triggers reading in T2 and T3 modes
SPE, SPD Puts the status byte on the bus
Bird 4421 RF Power Meter
14
IDentificatioN(IDN?)
Function Product identifies itself
Remarks Replies command same as U2
Remote ENable (REN)
Function Enables remote operation.
Remarks The unit must be addressed to listen after setting REN true.
The REMOTE indicator turns on when this command is received.
Go To Local (GTL)
Function Returns device to local operation.
Remarks Issuing a GTL command while the device is in Local Lockout mode does not
clear the lockout condition.
The REMOTE indicator turns off.
The LISTEN indicator remains on.
Local LOckout (LLO)
Function Disables local operation of all devices on the bus.
Remarks REN must be true to use LLO.
LLO is cleared by setting REN false.
InterFace Clear (IFC)
Function Terminates all bus activity and passes control to the system controller.
Remarks All devices are set to talker and listener idle states.
LISTEN mode is cancelled, and its indicator is turned off.
IEEE-488 GPIB Interface
15
Device CLear (DCL)
Function Resets the status of all devices to an initialized state.
Remarks Does not change the current interface mode.
The 4421 returns to the factory default condition listed in Figure 5-6.
Table 5-6 IEEE-488 Default Conditions
Selective Device Clear (SDC)
Function Resets the status of a selected device to an initialized state.
Remarks Only the device addressed will be cleared.
The 4421 returns to the factory default condition.
Group Execute Trigger (GET)
Function Initiates a measurement for all devices set to trigger on GET.
Remarks The 4421 must be already set to trigger on GET.
Used to synchronize measurements of multiple instruments.
Default Condition Related Command
Forward Carrier Wave FC
Auto Range ON RYY
Two Terminators (CR LF) YT
Prefixes YES PY
Trigger One Shot on Talk Address T1
All SRQ’s OFF M00
Send EOI with last byte of message KY
Bird 4421 RF Power Meter
16
Serial Polling Enable/Disable (SPE/SPD)
Function Enables or disables the serial polling sequence.
Remarks The SPE command puts all devices in serial poll mode waiting to be addressed.
The SPD command clears the SRQ bit (bit 6) and ends the polling sequence.
When addressed a device sends its status byte to the controller. A value of 1
for a bit means that the device condition that bit refers to is true. A value of 0
means that the condition is false.
The 4421 does not use all bits of the status byte. Table 5-7 lists the bits used,
along with a description and how to reset them.
Table 5-7 IEEE Status Byte Description
CAUTION
During remote operation, periodically monitor the bus service request line.
Failure to detect a service request could result in equipment damage.
Bit Name Condition
6 SRQ Set if a service request is generated by the 4421. If an SRQ
has been received by the controller and this bit is cleared,
other instruments on the bus should be checked to
determine where the SRQ occurred.
Cleared by a serial poll of the 4421.
3 Measurement
Complete
Set when the power meter has completed a reading.
Cleared by requesting a reading over the bus.
2 Reading
Underflow
Set when the RF power is underrange and a reading has
been completed.
Cleared by requesting a reading over the bus.
1 Reading Overflow Set when the RF power is overrange and a reading has
been completed.
Cleared by requesting a reading over the bus.
0 Error Set if an illegal device-dependent command (IDDC) or
illegal device-dependent command option (IDDCO) was
received, or if the power meter fails the self test.
Cleared by reading the U1 status word. The U1 word
contains details on the error, see “Status” on page 21.
IEEE-488 GPIB Interface
17
Device Dependent Commands
The device-dependent commands used by the 4421 Power Meter are listed in
Table 5-8, organized by category.
Note: The programming card also has a complete command list.
Table 5-8 IEEE-488 Device Dependent Command Summary
Category Command Description
Measurement FC Forward carrier wave
FD Forward dBm
RC Reflected carrier wave
RD Reflected dBm
SW Standing wave ratio
RL Return loss
MN Minimum value
MX Maximum value
Range RYY Auto range on
R00 to R17 Manual ranges
RNN Auto range off, stay at present range
Terminators YT Two terminators: CR, LF
YO One terminator: CR
YN No terminator
Prefixes PY Prefix YES
PN Prefix NO
Triggers T0 Continuous on TALK
T1 One shot on TALK
T2 Continuous on GET
T3 One shot on GET
T4 Continuous on measurement command
T5 One shot on measurement command
Serial Polling M00 Do not generate SRQ
M01 Generate SRQ on error
M02 Generate SRQ on measurement overrange
M04 Generate SRQ on measurement underrange
M08 Generate SRQ on operation complete
Status U0 Send back current machine state
U1 Send back error conditions
U2 Send back revision levels
Self-Test J0 Run self-test
EOI Response KY Send EOI on last byte
KN Do not send EOI on last byte
Writable Store WXXXXXX Place XXXXXX in RAM
Bird 4421 RF Power Meter
18
Forward Carrier Wave (FC)
Forward dBm (FD)
Reflected Carrier Wave (RC)
Reflected dBm (RD)
Function Selects forward or reflected RF power measurement mode.
Remarks Measurement results are returned in Watts or dBm.
Standing Wave Ratio (SW)
Return Loss (RL)
Function Selects SWR or return loss match measurement mode.
Remarks Measurement results are returned in VSWR or dB.
MiNimum Value (MN)
MaXimum Value (MX)
Function Selects minimum or maximum measurement mode.
Remarks Another measurement must be selected before selecting min or max.
Returns the minimum (or maximum) value of the previous measurement type.
IEEE-488 GPIB Interface
19
Range (Rxx)
Function Selects a measurement range listed in Table 5-9.
Remarks If the selected range is outside the range of the connected power sensor, the
command is ignored.
Table 5-9 Measurement Ranges
Termin a t o r s (Yx)
Function Selects the characters that follow the end of a data string. Set x to:
z“T” for two terminators; a carriage return(CR) and a line feed(LF).
z“O” for one terminator; a carriage return(CR).
z“N” for no terminator; message can be terminated by EOI.
Remarks Many controllers use the terminator sequence to recognize the end of an input
string. Using incorrect terminators can lock the bus.
Command Power Range
RYY Turn auto range on
RNN Turn auto range off. Keep present range
R17 18.0 – 199.9 MW
R16 1.80 – 19.99 MW
R15 0.180 – 1.999 MW
R14 18.0 – 199.9 kW
R13 1.80 – 19.99 kW
R12 0.180 – 1.999 kW
R11 18.0 – 199.9 W
R10 1.80 – 19.99 W
R09 0.180 – 1.999 W
R08 18.0 – 199.9 mW
R07 1.80 – 19.99 mW
R06 0.180 – 1.999 mW
R05 18.0 – 199.9 µW
R04 1.80 – 19.99 µW
R03 0.180 – 1.999 µW
R02 18.0 – 199.9 nW
R01 1.80 – 19.99 nW
R00 0.180 – 1.999 nW
Bird 4421 RF Power Meter
20
Prefixes (Px)
Function Turns the prefix mode on or off. Set x to:
z“Y” to enable prefixes.
z“N” to disable prefixes.
Remarks Prefixes are sent over the bus with the measurement, and indicate the status
of the current measurement (see Table 5-10 for examples):
z“FC”,”FD”,”RC”,”RD”,”SW”,”RL”,”MN”,”MX” indicates the measure-
ment type.
z“U” indicates underflow; the value sent is “.000”.
z“O” indicates overflow; the value sent is “199.9”.
z“N” indicates normal; the value sent is a normal on-scale reading.
z“4421” indicates the Bird model number.
Table 5-10 Prefix Examples
Triggers (Tx)
Function Selects the condition which will trigger a reading (see Table 5-11).
Remarks Failure to trigger device before requesting a reading will lock the bus.
T1 halts the bus until a reading is available.
T0 and T1 do not set the measurement complete SRQ.
T2, T3, T4, and T5 set a SRQ when the measurement is complete.
Fastest reading rate is 2.4 readings/second; slowest is 1 reading/sec.
Table 5-11 Trigger Conditions
Data String Description
NFC.0.123W(CR)(LF) Normal (N) forward carrier wave (FC), prefixes on
OFC 199.9W(CR)(LF) Overflowed (O) forward carrier wave (FC), prefixes on
199.9W(CR)(LF) Overflowed forward carrier wave, prefixes off
URD .000W(CR)(LF) Underflowed (U) reflected dBm (RD), prefixes on
Command Trigger Condition
T0 Continuous on talk
T1 One shot on talk
T2 Continuous on GET
T3 One shot on GET
T4 Continuous on measurement command (FC,FD,
RC, RD, SW, RL, MN, MX)
T5 One shot on measurement command (FC, FD,
RC, RD, SW, RL, MN, MX)
IEEE-488 GPIB Interface
21
SRQ Mask (Mxx)
Function Selectively masks status bits to prevent unwanted service requests.
Set xx to the sum of the binary values of the desired SRQ trigger bits. For
example, M12 would set the SRQ for both operation complete and underrange
(values 8 and 4). Set xx to “00” to never generate an SRQ.
Remarks If a status bit is masked (bit set to 0), SRQs won’t be generated for that condition.
Table 5-12 SRQ Mask Bits
Status (Ux)
Function Reads a status word and returns the information as a string. Set x to:
z“0” for machine status.
z“1” for error status.
z“2” for revision history.
Remarks After sending the status command, a status word is sent the next time the
unit is addressed to talk. To ensure the correct status is transmitted, the sta-
tus word should be requested as soon as possible after the command is sent.
Machine Status Word (U0) - The format of the machine status word is shown
in Figure 9. The default values are also shown.
Figure 9 Machine Status Word Format
Binary Value Bit Number Message
1 0 (LSB) Error (IDDC, IDDCO, self-test fail)
2 1 Measurement overrange
4 2 Measurement underrange
8 3 Operation complete
4 Not Used
5 Not Used
6 Can’t mask
7 (MSB) Not Used
Header
Measurement Function
Range
Prefix
Ter mi na tor
Trigger
SRQ Mask
EOI Response
TERM
–4420–FC
R
Y
Y
P
Y
Y
T
T
1
M
0
0
K
Y
Bird 4421 RF Power Meter
22
Error Status Word (U1) - The format of the error status word and the possible
error messages are shown in Figure 10. When an error occurs, an error is also
flagged in the status (serial poll) byte, and a SRQ may be generated (See “SRQ
Mask” on page 21). All flags will revert to their non-error states after the U1
command is sent.
Figure 10 Error Status Word Format
Revision History Word (U2) - The format of the revision history word is
shown in Figure 11.
Figure 11 Revision History Word Format
Note: If Writable stores parameter has not been set, this command
responds only with -4420-.
Status Meaning Description
ICM Invalid Command Set when an illegal device-dependent command
(IDDC) such as V2 is received. (V is illegal)
VCM Valid Command Set when no IDDC is received.
ICO Invalid Command Option Set when an illegal device-dependent command
option (IDDCO) such as T6 is received. (6 is illegal)
VCO Valid Command Option Set when no IDDCO is received.
PS Self-Test Pass Set when a self-test has been initiated by the
J0 command and the test result is acceptable.
FL Self-Test Fail Set when the self-test has failed. (This is the
default condition.)
Header
Command Status (shown valid)
Command Option Status (shown valid)
Self-test results (shown fail)
TERM
4–42
0VC
M
V
C
0
F
L
–
Header
Writable stores
Software Rev level
Hardware Rev level
IEEE-488 1978 compliance
IEEE-488 Bus address
* YY is replaced with current software revision level.
** ZZ is replaced with current hardware revision level.
***
4–42
0X
X
X
X
X
X
Y
Y
Z
Z
7
8
0
6
–TERM
IEEE-488 GPIB Interface
23
Self Test (J0)
Function Initiates a hardware and software test.
Remarks Results are stored in the U1 status word (see “Status” on page 21).
“J0” must be sent each time before reading the result.
End Or Identify (Kx)
Function Enables or disables the End or Identify (EOI) signal. Set x to:
z“Y” to enable.
z“N” to disable.
Remarks Disabling EOI can cause some controllers to lock unless another terminator is used.
When enabled, EOI is only asserted at the end of a multiple byte string.
Writable Store (Wxxxxxx)
Function Storage for six bytes of ASCII data.
Remarks Data stored is lost when the 4421 is turned off.
Data is sent back as part of the U2 status word.
25
Chapter 5 RS-232 Interface
This chapter discusses setup of the RS-232 interface feature and describes the
RS-232 commands that apply to the Bird 4421. Operators should understand
EIA Standard RS-232-C and have basic computer programming skills before
writing any programs.
Description
The Bird 4421 RS-232 interface feature is an integral part of the I/O hub cir-
cuit board inside of the mm21. An eight-position DIP switch is used to set
operational conditions such as baud rate, parity, and stop bits. The bottom
line of the display indicates the current bus status.
Cable Connector
The interface uses a standard 25-pin RS-232 connector. Pin assignments are
listed in Table 6-13. If the controller uses a different wiring arrangement, do
not attempt to rewire the interface module’s connector. A null modem kit
should be used for rewiring instead.
Table 6-13 RS-232 Pin Assignments
Indicators
The bottom line of the power meter’s display shows indicators describing the
status of the Bird 4421 when used with the RS-232 interface. These are:
TALK - When TALK is displayed, the power meter is transmitting data. This
is always shown when the unit is in “talker-only” mode.
LISTEN - When LISTEN is displayed, the power meter is receiving data.
Pin Designation Notes
1Protection Ground Chassis Ground
2Transmit Data
3Receive Data
4Request to Send (Output) Set true after module power up
5Clear to Send (Input) Set by input device. When true, it enables the
module to transmit. When false, it disables transmission.
6Data Set Ready (Input) Set internally true by module
7Signal Ground Return path for data and control signals
8Receive Signal DET (Input) Set true by module
20 Data Terminal Ready (Output) Set true after module power up
Bird 4421 RF Power Meter
26
Setup
DIP Switch
Set the DIP switches according to application needs and the requirements of
the controller. Available settings and factory defaults are listed in Figure 12.
Note: There are several button styles on DIP switches (slide, rocker,
lever). Examine the DIP switch to determine the ON and OFF positions.
Figure 12 RS-232 Interface Default DIP Switch Settings
Note: If you change switch settings when the unit is ON, the new
settings will not become effective unitl you turn power OFF and then
back ON.
Switch Function Description
1Stop Bit ON 1 Stop Bit
OFF2 Stop Bits*
* Default factory setting
2Command
Mode
ON ENT command needed before sending reading to
controller*
OFFTrigger automatically sends reading
Reading also sent when front panel push button pressed
3Word Length ON 8 Data Bits*
OFF7 Data Bits
4,5 Parity (4) (5)
ON ON
ON OFF
OFFON
OFFOFF
No Parity*
Odd Parity
Even Parity
Mark Parity
6,7,8 Baud Rate (6) (7) (8)
ON ON ON
ON OFFON
ON OFFOFF
OFFON ON
OFFON OFF
OFFOFFON
OFFOFFOFF
Auto Baud†
300
600
1200
2400*
4800
9600
† For more information see “Auto Baud”
21436587
ON
RS-232 Interface
27
Auto Baud
Auto Baud is used to automatically determine the correct transmission rate.
After setting DIP switches 1 through 5, follow the steps below to use auto baud:
1. Set DIP switches 6, 7, and 8 to ON.
2. Connect a controller to the power meter.
3. Turn the power meter on.
4. Send the character U (hexadecimal 55) from the controller to the power
meter.
5. Wait 1 second.
6. If the power meter’s front panel displays LISTEN, the baud rate has been
determined. If not, repeat steps 4 and 5.
If, after 30 seconds, the module cannot absolutely determine a baud rate, it
will choose a rate based on data acquired during the test.
Note: Auto Baud is the only automatically chosen setting. Other
items such as parity and stop bits must be manually selected.
Talker-Only Mode
The Bird 4421 can be set up for manual operation while automatically sending
data to an output device (Talker-Only Mode). To do so, turn DIP switch 2 OFF
and cycle the power. TALK will be displayed.
In Talker-Only mode, pressing a button on the meter triggers a measurement.
When the measurement is complete, the information is sent to the bus.
Command Syntax
The Bird 4421 accepts two types of commands. General bus commands are
commands, such as Initialize (INT), that apply to any RS-232 interfaced
device. Device-dependent commands are specific to the 4421.
If an invalid command is sent to the unit, an error condition is placed in the
serial poll byte and the offending command is not executed.
A group of device-dependent commands can be sent as a single string as long
as like command categories are not repeated. For example: “PNFCFDT3TRG”.
This string sets up the 4421 to send no prefixes, read forward dBm, make one
reading on “TRG”, and triggers a measurement.
Note: Commands can be entered in either upper or lower case.
Note: Only the last command entered of each category will be exe-
cuted. As a command string is processed by the 4421, each category of
command is stored in a separate location. Two commands of the same
category will be stored in the same location, so that the second will
overwrite and erase the first one.
General Bus Commands
The general bus commands supported by the RS-232 interface module are
listed in Table 6-14.
Table 6-14 RS-232 General Bus Commands
Command Effect on Bird 4421
INT Returns to default conditions
ENT Sends a reading to the controller
TRG Triggers reading in T3 mode
B1 to B7 Selects a baud rate
XO/XF Enables/disables software handshake
Bird 4421 RF Power Meter
28
INiTialize (INT)
Function Resets the Bird 4421 and returns it to the factory defaults.
Remarks If INT is linked with any other command within a string, it must be separated
from that command by a space.
ENTer (ENT)
Function Makes the power meter transmit a reading to the controller.
Remarks A measurement must have already been triggered, placing a reading in the
output buffer.
To send a reading whenever a measurement is triggered, set DIP switch 2 to
OFF. The ENT command will not need to be sent.
TRiGger (TRG)
Function Initiates a measurement if the power meter is in trigger mode (T3).
Baud Select (Bx)
Function Selects a baud rate listed in Table 6-15.
Remarks When the meter recognizes a valid Bx command, its baud rate is immediately
changed. (The controller is assumed to be transmitting at the new rate; other-
wise sending commands would not be possible.)
This command overrides the DIP switch setting.
Table 6-15 Baud Rates
Xmission Flow Control (XO/XF)
Function Enables or disables the XON/XOFF flow control.
zXO enables flow control.
zXF disables flow control.
Remarks When data is being sent from the power meter to the computer and flow con-
trol is enabled, data transmission will be suspended when the XOFF character
(hexadecimal 13) is sent by the computer. Transmission will resume when
XON (hex 11) is sent by the computer.
When data is being sent from the computer to the power meter, XOFF will be
sent to the computer when the input buffer fills up. XON will be sent to the
computer when the buffer has emptied.
Command Baud Rate
B2 300
B3 600
B4 1200
B5 2400
B6 4800
B7 9600
RS-232 Interface
29
Device Dependent Commands
The device-dependent commands used by the 4421 Power Meter are listed in
Table 6-16, organized by category.
Table 6-16 RS-232 Device Dependent Command Summary
Forward Carrier Wave (FC)
Forward dBm (FD)
Reflected Carrier Wave (RC)
Reflected dBm (RD)
Function Selects forward or reflected RF power measurement mode.
Remarks Measurement results are returned in Watts or dBm.
Standing Wave Ratio (SW)
Return Loss (RL)
Function Selects SWR or return loss match measurement mode.
Remarks Measurement results are returned in VSWR or dB.
Category Command Description
Measurement FC Forward carrier wave
FD Forward dBm
RC Reflected carrier wave
RD Reflected dBm
SW Standing wave ratio
RL Return loss
MN Minimum value
MX Maximum value
Range RYY Auto range on
R00 to R17 Manual ranges
RNN Auto range off, stay at present range
Terminators YT Two terminators: CR, LF
YO One terminator: CR
YN No terminator
Prefixes PY Prefix YES
PN Prefix NO
Triggers T0 Continuous on ENT
T1 One shot on ENT
T3 One shot on TRG
T5 One shot on measurement command
Status U0 Send back current machine state
U1 Send back error conditions
U2 Send back revision levels
Self-Test J0 Run self-test
Writable Store WXXXXXX Place XXXXXX in RAM
Bird 4421 RF Power Meter
30
MiNimum Value (MN)
MaXimum Value (MX)
Function Selects minimum or maximum measurement mode.
Remarks Another measurement must be selected before selecting min or max.
Returns the minimum (or maximum) value of the previous measurement type.
Range (Rxx)
Function Selects a measurement range listed in Figure 6-17.
Remarks If the selected range is outside the range of the connected power sensor, the
command is ignored.
Table 6-17 Measurement Ranges
Termin a t o r s (Yx)
Function Selects the characters that follow the end of a data string. Set x to:
z“T” for two terminators; a carriage return(CR) and a line feed(LF).
z“O” for one terminator; a carriage return(CR).
z“N” for no terminator.
Remarks Many controllers use the terminator sequence to recognize the end of an input
string. Using incorrect terminators can lock the bus.
Prefixes (Px)
Function Turns the prefix mode on or off. Set x to:
z“Y” to enable prefixes.
z“N” to disable prefixes.
Command Power Range
RYY Turn auto range on
RNN Turn auto range off. Keep present range
R17 18.0 – 199.9 MW
R16 1.80 – 19.99 MW
R15 0.180 – 1.999 MW
R14 18.0 – 199.9 kW
R13 1.80 – 19.99 kW
R12 0.180 – 1.999 kW
R11 18.0 – 199.9 W
R10 1.80 – 19.99 W
R09 0.180 – 1.999 W
R08 18.0 – 199.9 mW
R07 1.80 – 19.99 mW
R06 0.180 – 1.999 mW
R05 18.0 – 199.9 µW
R04 1.80 – 19.99 µW
R03 0.180 – 1.999 µW
R02 18.0 – 199.9 nW
R01 1.80 – 19.99 nW
R00 0.180 – 1.999 nW
RS-232 Interface
31
Remarks Prefixes are sent over the bus with the measurement, and indicate the status
of the current measurement (see Table 6-18 for examples):
z“FC”,”FD”,”RC”,”RD”,”SW”,”RL”,”MN”,”MX” indicates the measure-
ment type.
z“U” indicates underflow; the value sent is “.000”.
z“O” indicates overflow; the value sent is “199.9”.
z“N” indicates normal; the value sent is a normal on-scale reading.
z“4421” indicates the Bird model number.
Table 6-18 Prefix Examples
Triggers (Tx)
Function Selects the condition which will trigger a reading (see Table 6-19).
Remarks Failure to trigger device before requesting a reading will lock the bus.
Fastest reading rate is 2.4 readings/second; slowest is 1 reading/sec.
Table 6-19 Trigger Conditions
Status (Ux)
Function Reads a status word and returns the information as a string. Set x to:
z“0” for machine status.
z“1” for error status.
z“2” for revision history.
Remarks After sending the status command, a status word is sent the next time the
unit is addressed to talk. To ensure the correct status is transmitted, the sta-
tus word should be requested as soon as possible after the command is sent.
Data String Description
NFC.0.123W(CR)(LF) Normal (N) forward carrier wave (FC), prefixes on
OFC 199.9W(CR)(LF) Overflowed (O) forward carrier wave (FC), prefixes on
199.9W(CR)(LF) Overflowed forward carrier wave, prefixes off
URD .000W(CR)(LF) Underflowed (U) reflected dBm (RD), prefixes on
Command Trigger Condition
T0 Continuous on ENT
T1 One shot on ENT
T3 One shot on TRG
T5 One shot on measurement command (FC, FD,
RC, RD, SW, RL, MN, MX)
Bird 4421 RF Power Meter
32
Machine Status Word (U0) - The format of the machine status word is shown
in Figure 13. The default values are also shown.
Figure 13 Machine Status Word Format
Note: This command sets the unit to the settings that were last
issued remotely (through RS-232 or GPIB). Therefore, it will over ride
any manual changes selected at the front panel of the unit.
Error Status Word (U1) - The format of the error status word and the possible
error messages are shown in Figure 14. All flags will revert to their non-error
states after the U1 command is sent.
Figure 14 Error Status Word Format
Revision History Word (U2)The format of the revision history word is shown
in Figure 15.
Figure 15 Revision History Word Format
Status Meaning Description
ICM Invalid Command Set when an illegal device-dependent command
(IDDC) such as V2 is received. (V is illegal)
VCM Valid Command Set when no IDDC is received.
ICO Invalid Command
Option
Set when an illegal device-dependent command
option (IDDCO) such as T6 is received. (6 is
illegal)
VCO Valid Command Option Set when no IDDCO is received.
PS Self-test Pass Set when a self-test has been initiated by the J0
command and the test result is acceptable.
FL Self-test Fail Set when the self-test has failed. (This is the
default condition.)
Header
Measurement Function
Range
Prefix
Terminator
Trigger
XON / XOFF
TERM
–4420–FC
R
Y
Y
P
Y
Y
T
T
1
X
0
Header
Command Status (shown valid)
Command Option Status (shown valid)
Self-test results (shown fail)
TERM
4–42
0VC
M
V
C
0
F
L
–
Header
Writable stores
Software Rev level
Hardware Rev level
Interface standard
* YY is replaced with current software revision level.
** ZZ is replaced with current hardware revision level.
***
4–42
0X
X
X
X
X
X
Y
Y
Z
Z
–TERMRS-232
RS-232 Interface
33
Self Test (J0)
Function Initiates a hardware and software test.
Remarks Results are stored in the U1 status word (see “Status” on page 31).
“J0” must be sent each time before reading the result.
Writable Store (Wxxxxxx)
Function Storage for six bytes of ASCII data.
Remarks Data stored is lost when the 4421 is turned off.
Data is sent back as part of the U2 status word.
35
Chapter 6 Maintenance
This chapter describes routine maintenance, along with troubleshooting
instructions for the power meter and power sensor. Disassembly instructions
for the Bird Cal Cart are also provided. For service beyond this level, return
the unit to a qualified service center.
The Bird 4421 Power Meter requires only simple, routine maintenance.
zWipe off dust and dirt regularly.
zCheck the connectors and cables for damage.
zClean the connector contacts with alcohol or dry cleaning solvent.
Cleaning
Clean the Bird 4421 Power Meter and its display with a soft cloth dampened
with mild detergent and water only. Clean sensors with a dry cleaning solvent
that leaves no residue.
Troubleshooting
Since the power meter and power sensor can only work together, the first step
is to determine which is malfunctioning. Connect the power sensor to the
meter and perform the functional test on page 37. If the power meter is mal-
functioning, refer to the troubleshooting table below. If the power sensor is
malfunctioning, return it for service.
This manual cannot list all malfunctions that may occur, or corrective actions.
If a malfunction is not listed or is not corrected by the listed corrective actions,
contact a qualified service center.
Note: For power sensors in Cal Carts, following the test procedure
will check the sensor not covered by the safety cover. To test the other
sensor slide the safety cover over, then proceed as normal.
WARNING
To avoid personal injury, disconnect the power cord from the AC line before
performing any maintenance, including fuse replacement or changing the
line voltage setting.
WARNING
Never attempt to connect or disconnect RF equipment from the transmission
line while RF power is being applied.
Leaking RF energy is a potential health hazard.
WARNING
The Bird 4421 contains no user-serviceable parts. Do not remove its cover.
CAUTION
Do not use harsh or abrasive detergents for cleaning.
CAUTION
Due to the complexity of the Bird Power Sensor, field repairs beyond general
maintenance should not be attempted.
Removal or disturbance of the power sensor cover can result in cancellation
of lifetime warranty.
Bird 4421 RF Power Meter
36
PROBLEM POSSIBLE CAUSE CORRECTION
Power meter has
no power
Have the batteries been
charged?
Recharge the batteries.
Is the power meter’s ac
power cord connected?
Connect the power cord.
Is the ON/OFF rocker switch
on the rear panel set to
OFF?
Set the switch to ON.
(Cal Cart only)
Is the Cal Cart’s AC power
cord connected to the AC
line?
Connect AC power.
Blown fuse? Check fuse rating and replace fuse
(See “Replacing Fuses” on
page 39).
Dash moves
across the display
Is the sensor cable
connected to both the power
meter and power sensor?
Connect sensor cable.
Is the sensor cable
defective?
Replace sensor cable.
Display blank or
not updating
Have the batteries been
charged?
NO: Recharge battery
YES: Return meter for service.
Power meter turns
off while on battery
power
Is “LO BAT” displayed? YES: Recharge battery
NO: Return meter for service.
Push buttons do
not respond
Test the push buttons (See
“Push Button Test” on
page 37). Are they
defective?
Return meter for service.
Every segment on
the display is lit
Return meter for service.
IEEE-488
Interface does not
respond to the
interface link
Are the address in the
interface program and the
address setting on the DIP
switches on the interface
module the same?
Change the program or DIP switch
setting so that the addresses are
the same (See “Dip Switch” on
page 12).
Send the “J0” self test
command, then check the
status. Does the power
meter fail the self test?
Replace I/O hub PCB.
Is the IEEE cable defective? Replace IEEE interface cable.
RS-232 Interface
does not respond
to the interface
link. Fails J0 self-
test command.
Are the DIP switches set
correctly?
Set DIP switches.
Is the RS-232 cable
defective?
Replace RS-232 interface cable.
With the RS-232,
the power meter
displays “TALK”
but does not
operate as
expected.
Is DIP switch 2 set correctly? For “talk/listen” operation, set this
switch to ON. For “talk always” set
this switch to OFF.
Is DIP switch 1 set correctly? Set DIP switch 1 as indicated in
Figure 8.
Maintenance
37
Functional Test
1. Turn the power meter off. The ON/OFF switch on the rear panel should be
OFF and the ac power cable should be connected.
2. Turn ON the ON/OFF switch on the rear panel of the meter.
3. While holding down the FWD and SWR push buttons, press the ON/OFF
button on the front panel of the power meter. Immediately release all three.
Note: The unit tests the display on power up cycling through and
activating each segment two times and then activating all segments at
once two times.
4. The power meter’s model number and revision date should scroll across the
display. If a dash “–” is displayed instead, then the meter is malfunctioning.
5. The power sensor’s model number and revision date should scroll across
the display. If a dash is displayed after the power meter data, then the
power sensor is malfunctioning.
Figure 16 Test Display, No Malfunction
Push Button Test
Note: If a push button is malfunctioning, return the power meter.
1. Disconnect the power sensor.
2. Turn the power meter ON.
Note: After the power up display disappears, a dash “–” should
scroll across the display.
3. Turn the power meter OFF.
4. Connect the power senson.
5. Turn the power meter ON.
Note: “AUTO” and “FWD” should be displayed, and a reading of
“0.00 W” (or a very low number).
6. Press RFL.
Note: “FWD” should change to “RFL” on the display. The reading
should remain the same.
7. Press SWR.
Note: “RFL” should change to “SWR”. “0.00 W” should change to
“ ” (underrange error).
8. Hold down MIN.
Note: “ ” should change to “ ” (overrange error).
9. Release MIN.
Note: “ ” should change to “ ”.
10. Press dBm.
Note: “SWR” should turn OFF and “dBm” should turn ON..
Meter’s
Model
Number
Meter’s
Software
Rev. Date
Sensor’s
Model
Number
Sensor’s
Software
Rev. Date
–..4421..–07.01.02–..4021..–07.01.02–
Bird 4421 RF Power Meter
38
11. Press dBm.
Note: “dBm” should change to “SWR”.
12. Press FWD.
Note: “SWR” should change to “FWD” and “ ” to “.0000 W” (or a
very low number).
13. Hold down MAX.
Note: “.0000” should change to “1.0000”.
14. Release MAX.
Note: “1.0000” should change to “.0000” (or a very low number).
15. Press LIGHT.
Note: The back-light should turn on.
16. Press LIGHT.
Note: The back-light should turn off.
17. Press s (up).
Note: The power meter should change ranges each time it is
pressed until it reaches “0.000 KW”.
18. Press t (down).
Note: The power meter should change ranges each time it is
pressed until it reaches “0.00 W”.
19. Turn the power meter OFF.
Repair
Front Panel (Cal Cart only)
Note: If the power meter is mounted in a Cal Cart, to access the
power sensor or the ac connections, it will be necessary to remove the
front panel of the Cal Cart.
1. Remove both screws on the front panel, between the RF connector and the
handle.
2. Pull on the handle set into the base of the front panel to remove it.
Note: When making AC connections, refer to the following wiring
diagram.
Figure 17 Cal Cart Wiring Schematic
WARNING
To avoid personal injury, disconnect the power cord from the AC line before
performing any maintenance, including fuse replacement or changing the
line voltage setting.
Maintenance
39
Cord Reel (Cal Cart only)
1. Disconnect the cord reel from the terminal strip.
2. Unscrew the AC connector.
3. Unscrew and remove the cord reel.
4. Screw the replacement cord reel into place.
5. Thread the AC connector through the grommet, and connect the wires on
the other end to the terminal strip (See Figure 18).
Replacing Fuses
1. Gently pry the fuse drawer out of the ac module. The fuse holder does not
detach from the AC module.
2. Install the replacement fuses then close and secure the fuse holder. Fuse 1
is a spare fuse and fuse 2 is the active fuse.
Figure 18 AC Line Fuse
WARNING
To avoid personal injury, disconnect the power cord from the ac line before
performing any maintenance, including fuse replacement.
CAUTION
Failure to install the properly rated fuse may result in equipment damage or
nuisance failures.
AC Line Voltage Fuse Rating
115 Vac T630 mA, 5x20 mm Time Lag Fuse
230 Vac T315 mA, 5x20 mm Time Lag Fuse
Fuse 1
Fuse 2
Fuse
Drawer
AC Module
Bird 4421 RF Power Meter
40
Replacing Batteries
1. Disconnect the AC power cord from the ac mains supply.
2. Remove the four screws that secure the top cover.
3. Lift the top cover to access the attached ground wire then disconnect the
ground wire and remove the cover.
4. Unfasten the battery retaining belts then remove the battery tubes
(Figure 19). Be sure to note the polarity and orientation of the battery
tubes before removing them.
5. Remove the batteries from each tube and insert replacement batteries. Be
sure to note the polarity (positive and negative) arrangement of the batteries.
6. Install the battery tubes into the unit and secure with the retaining belts.
Be sure to position the retaining belts as they were before removal and
tighten them securely.
7. Connect the ground wire to the top cover.
8. Install the top cover and secure it with the four screws removed earlier.
Figure 19 Batteries
Long Term Storage
Do not store the instrument for long periods of time without recharging the bat-
teries. When the instrument is stored for long periods of time without use, the
batteries will loose their charge and also loose the ability to reach full charge
when put into service. To restore the battery charge, perform a full charge for 28
hours. If the batteries are not fully charged after 28 hours, completely discharge
the batteries then perform a full charge again. If necessary, repeat this dis-
charge and charge cycle up to three times. If the batteries do not remain
charged after three discharge-charge cycles, replace the batteries.
WARNING
Exposed AC line voltage (115 VAC or 230 VAC). Disconnect the power cord
from the AC line before replacing the batteries. Failure to comply may
result in severe electrical shock or death.
WARNING
Use only Nickel Metal Hydride (NiMH) batteries that have a minimum
capacity of 4500 milliamper hours (mAh). Do not install batteries that are
not Nickel Metal Hydride. Do not install NiMH batteries that have less than
4500 mAh capacity. Failure to comply may result in damage to the batteries,
damage to the instrument, and injury to personnel from battery chemicals.
Item Description
1 Battery retaining belt
2 Battery tube (batteries inside)
X4
X4
Maintenance
41
Power Sensor (Cal Cart only)
1. Disconnect the RF line from the Cal Cart.
2. Remove the Cal Cart front panel (see "Front Panel (Cal Cart only)" on page 38).
3. Disconnect the sensor cable from the power sensor.
4. Disconnect the RF cable from the sensor output port.
5. Remove the screws on the sensor mounting bracket.
6. Remove the sensor from the mounting bracket.
7. Put the new sensor in the bracket and screw it into place.
Note: Make sure the arrow on the side of the sensor points towards the load,
and that the end labeled “SOURCE” points towards the front of the Cal Cart.
8. Connect the RF cable to the sensor end labeled “LOAD”. Connect the sensor cable.
9. Replace the Cal Cart front panel.
Load
1. Disconnect all RF cables from the RF connectors on the load.
2. Unplug the blower assembly on blower-equipped loads.
3. Replace the vent plugs with the shipping plugs.
4. Remove the mounting bolts connecting the load to the Cal Cart.
5. Remove the load.
Casters
1. Remove the load (See "Load" on page 41).
2. Flip the cart over.
3. Unscrew the defective caster.
4. Screw the new caster into place and replace the load.
Handle
1. Unscrew the hadle
2. Remove the old handle.
3. Screw the new handle into place.
WARNING
To avoid personal injury, disconnect the power cord from the AC line before
performing any maintenance, including fuse replacement or changing the
line voltage setting.
WARNING
Never attempt to connect or disconnect RF equipment from the transmission line
while RF power is being applied. Leaking RF energy is a potential health hazard.
CAUTION
The Bird 4421 must be powered off when connecting or disconnecting the
power sensor from the power meter.
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
CAUTION
Due to the complexity of the Bird Power Sensor, field repairs beyond general
maintenance should not be attempted. Removal or disturbance of the power
sensor cover can result in cancellation of lifetime warranty.
WARNING
Heavy load. Do not attempt to lift unaided.
Bird 4421 RF Power Meter
42
Storage and Shipment (Cal Cart only)
Cover the unit before storing to keep out dust and dirt. It is not necessary to
install the shipping plug. Store in a dry, dust-free environment where the
ambient temperature will remain between –20 and +50 °C (–4 to +122 °F).
Before shipping the Bird Cal Cart, take the following precautions:
zRemove the vent plugs and replace them with the shipping plugs.
Wrap the vent plugs with padding and tape them to the side of the
load for protection.
Note: With the shipping plugs installed, it is not necessary to
empty out the coolant.
zRepack in the original carton or contact Bird for a transit case.
Specifications, Cal Cart
To determine the model numbers of the Cal Cart components, refer to "About This
Manual" on page x. For load specifications, refer to the load manual included.
Note: Certain sensors or connectors may be incompatible with
some models. Refer to "About This Manual" on page x for a list of avail-
able components, or contact Customer Service.
Max. Power
Under normal operating conditions, the Cal Cart’s maximum power is the
MINIMUM of the max. power of the sensor and the max. power of the load.
The following modifiers apply:
zAbove 65 MHz, derate the load’s max. power. See "High Frequency
Derating 1" on page 47.
zDue to the wide variety of available connectors, frequency range and
maximum power may be reduced. Insertion loss is specified with female
N connectors. Choose connectors appropriate for the frequency and power
of operation.
zDerate RF power by 2.5% for every 305m (1,000 ft.) above 1,520m (5,000 ft.).
Table 7-20 Bird Cal Cart
Frequency Range Sensor dependent, 30 MHz max.
Power Range Dependent on sensor, sensor connectors, and load
Connectors Customer specified (See "Available Connectors" on page 49)
Dimensions
Short Cart
Long Cart
42”L x 20”W x 42”H (1067 x 508 x 1067 mm)
52”L x 20”W x 42”H (1321 x 508 x 1067 mm)
Weight, Nominal
Short Cart
Long Cart
175 lbs. (80 kg)
290 lbs. (114 kg)
Temperature Range
Operating
Storage
0 to +35 °C (32 to +95 °F)
–20 to +70 °C (–4 °F to +158 °F)
Altitude 1520 m (5000 ft.)
Humidity 85% noncondensing max
Calibration Cycle,
Nominal 1 year
CE CE Compliant. Refer to Declaration of Conformity for specific
standards.
Maintenance
43
Specifications, 4421 Power Meter
Specifications, Power Sensors
Table 7-21 Bird 4421 RF Power Meter
Frequency Range Sensor dependent
Power Range Sensor dependent
VSWR Display 1.0 – 199.9 max
Return Loss Display 0 to 40 dB max
Display Accuracy ± 1 on least significant digit
AC Power 115/230 Vac @ 50/60 Hz; 60 W
Batteries 8 Nickel Metal Hydride 1.2 v cells, rechargeable
Battery Life Approximately 8 hours continuous usage
(reduced after high temperature charging)
Battery Charger Built-in battery charger. Drained batteries require
approximately 28 hours to recharge.
Display LCD, 4½ digit display. Indicates mode, measurement units,
battery condition, remote status, and signal increase/
decrease. Self contained backlight.
Optional Interfaces IEEE-488 GPIB
RS-232
Fuse Rating IEC (5 x 20 mm) Time Lag Type T
115 Vac
230 Vac
T630 mA
T315 mA
CE CE Compliant. Refer to Declaration of Conformity for
specific standards.
Humidity 95% max. (noncondensing)
Altitude Up to 10,000 feet (3,000 m)
Temperature Range
Operating
Storage
0 to 50 °C (32 to 122 °F)
–20 to +50 °C (–4 to +122 °F)
Dimensions 15.5”L x 12.25”W x 4.25”H (393 x 311 x 108 mm)
Weight, Nominal 9.5 lbs. (4.3 kg)
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
Bird 4421 RF Power Meter
44
Table 7-22 Specifications Common to all Sensors
Impedance, Nominal 50 ohms
Max. Allowable Terminating
VSWR
2.00:1
Calibration Technique Frequency-specific calibration factors stored in
nonvolatile memory in each sensor.
Sensor output corrected for frequency and
temperature within specified ranges.
Calibration Cycle, Nominal 4027A and 4027F, 6 months
All other models, 1 year
Accuracy, Reflected Calculated from FWD accuracy and FWD power
Accuracy, VSWR Calculated from FWD and RFL power
Sampling Rate, Nominal 2 readings/second
Operating Power Supplied by power meter via sensor cable
Connectors
4028B10M
4028C10M
4028A Series
All other models
1-5/8” EIA Flanged
3-1/8” EIA Flanged
7-16 DIN, LC, HN, or 7/8”
Customer specified from QC list, appropriate for
frequency and power.
CE CE Compliant. Refer to Declaration of Conformity
for specific standards.
Humidity, Max. 95% (noncondensing)
Altitude, Max. 10,000 feet (3,000 m)
Temperature Range
Operating
Storage
0 to 50 °C (32 to 122 °F)
–20 to +70 °C (–4 to +158 °F)
Dimensions
4028B3M, 4028B10M
4028A Series
All other models
6.75”L x 3.5”W x 4.75”H (175 x 89 x 121 mm)
4.7”L x 3.2”W x 3.8”H (120 x 82 x 97mm)
5.2”L x 2.5”W x 3.25”H (137 x 64 x 83 mm)
Weight, Nominal
4028B3M, 4028B10M,
4028C10M
4028A2M, 3M, 4M, 10M,
and 25M
All other models
5 lb. 2 oz. (2.33 kg)
3 lb. 5 oz. (1.5 kg)
1 lb. 13 oz. (0.8 kg)
RFL Accuracy FWD Accuracy FWD Power
10Directivity 10/
---------------------------------+=
VSWR 1
PR
PF
------+
⎝⎠
⎜⎟
⎛⎞
1
PR
PF
------–
⎝⎠
⎜⎟
⎛⎞
⁄=
Maintenance
45
Table 7-23 Bird 4020 Series RF Power Sensors
Table 7-24 Bird 4027A Series RF Power Sensors
RF Power Range
4021, 4022
4024, 4025
300 mW – 1 kW
3 W – 10 kW
Frequency Range
4021
4022
4024
4025
1.8 – 32 MHz
25 MHz – 1 GHz
1.5 – 32 MHz
100 kHz – 2.5 MHz
Accuracy, Fwd, Best Case*
* For rated accuracy, no more than 1% AM; Harmonics –50 dBc or less
Derate accuracy by 3.0% (1σ) below 15 °C and above 35 °C
± 3% (1σ)
VSWR, Max.
4021, 4024, 4025
4022
1.05:1
1.05:1, 25 – 512 MHz and 1.10:1, 512 MHz – 1 GHz
Insertion Loss, Max.
4021, 4024, 4025
4022
0.05 dB
0.05 dB, 25 – 512 MHz and 0.13 dB, 512 MHz – 1 GHz
Directivity, Min.
4021, 4022
4024
4025
30 dB
28 dB, 1.5 – 2.5 and 25 – 32 MHz and 30 dB, 2.5 – 25 MHz
28 dB, 100 – 125 kHz and 30 dB, 125 – 2500 kHz
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
Frequency Range
4027A250K
4027A400K
4027A800K
4027A2M
4027A4M
4027A10M
250 – 400 kHz
400 – 550 kHz
800 – 950 kHz
1.5 – 2.5 MHz
3 – 5 MHz
10 – 15 MHz
4027A12M
4027A25M
4027A35M
4027A60M
4027A100M
4027A150M
10 – 15 MHz
25 – 30 MHz
35 – 45 MHz
45 – 65 MHz
95 – 105 MHz
150 – 170 MHz
RF Power Range
4027A12M
4027A25M
4027A35M
4027A60M
300 mW – 1 kW
3 W – 9 kW
3 W – 7.5 kW
3 W – 6 kW
4027A100M
4027A150M
All other models
3 W – 4 kW
3.75 W – 3.75 kW
3 W – 10 kW
Accuracy, Fwd, Best Case*
* For rated accuracy, no more than 1% AM; Harmonics –50 dBc or less
Derate accuracy by 1% (1σ) outside cal. power or cal. frequency
Derate accuracy by 1% (1σ) below 15 °C and above 35 °C
± 1.0% (1σ)
Calibration Frequencies, Typical (MHz)†
† Other calibration frequencies available upon request
4027A250K
4027A400K
4027A800K
4027A2M
4027A4M
4027A10M
0.25, 0.40
0.40
0.90
1.8, 2.0, 2.17
4.0, 5.0
10.0, 13.56, 15.0
4027A12M
4027A25M
4027A35M
4027A60M
4027A100M
4027A150M
10.0, 13.56, 15.0
25.76, 27.12, 28.48
40.68
55.0, 60.0
95.0, 100.0
162.0
Calibration Power, Typical
4027A12M
All other models
700 W
1.7 kW
VSWR, Max. 1.05:1
Insertion Loss, Max. 0.05 dB (with female “N” connectors)
Directivity, Min.
4027A12M
All other models
30 dB
28 dB
Bird 4421 RF Power Meter
46
Table 7-25 Bird 4027F Series RF Power Sensors
Table 7-26 Bird 4028A and 4028B Series RF Power Sensors
Frequency Range
4027F2M
4027F10M
4027F60M
1.8 – 2.2 MHz
12 – 15 MHz
57 – 63 MHz
RF Power Range
4027F2M, 4027F10M
4027F60M
0.1 – 10 kW
0.1 – 3 kW
Accuracy, Fwd, Best Case ± 1.0% (2σ)
Calibration Frequencies, Typical*
4027F2M
4027F10M
4027F60M
* Other calibration frequencies available upon request
1.8, 2.0, 2.17 MHz
12.0, 12.5, 13.56, 14.0, 15.0 MHz
57.0, 58.5, 60.0, 61.5, 63.0 MHz
Calibration Power, Typical 1.7 kW
Harmonic Rejection, Min.
4027F2M
4027F10M
4027F60M
26 dB @ 3.6 – 3.8 MHz, 30 dB @ > 3.8 MHz
30 dB @ > 25 MHz
30 dB @ > 114 MHz
Low Frequency Rejection, Min.
4027F10M
4027F60M
30 dB @ < 1 MHz
30 dB @ < 15 MHz
Max Error Induced by 10% AM
4027F2M, 4027F10M
4027F60M
0.2% @ < 5 kW, 1.0% @ 5 – 10 kW
0.2% @ < 1.5 kW, 1.0% @ 1.5 – 3 kW
VSWR, Max. 1.05:1
Insertion Loss, Max. 0.05 dB (with female “N” connectors)
Directivity, Min. 28 dB
Frequency Range
4028A250K
4028A400K
4028A2M
4028A3M
4028A4M
4028A10M, 4028B10M,
4028C10M
4028A25M
4028B3M
250 – 400 kHz
400 – 550 kHz
1.5 – 2.5 MHz
2.5 – 3.5 MHz
3.5 – 4.5 MHz
10 – 15 MHz
25 – 30 MHz
2.5 – 4 MHz
RF Power Range
4028A250K, 4028A400K
4028C10M
All other models
1 kW – 20 kW
500W – 50 kW
1 kW – 25 kW
Accuracy, Fwd, Best Case*
* For rated accuracy, no more than 1% AM; Harmonics –50 dBc or less
Derate accuracy by 2% (2σ) outside cal. power or cal. frequency
Derate accuracy by 2% (2σ) below 15 °C and above 35 °C
± 2.0% (2σ)
Calibration Frequencies, Typical
(MHz)†
4028A250K
4028A400K
4028A2M
4028A3M
4028A4M
4028A10M, 4028B10M,
4028C10M
4028A25M
4028B3M
† Other calibration frequencies available upon request
0.25, 0.40
0.40
1.8, 2.0, 2.17
2.5, 3.2, 3.5
3.5, 4.0
10.0, 13.56, 15.0
25.76, 27.12, 28.48
2.5, 3.2, 3.5, 4.0
Calibration Power, Typical 3.5 kW
VSWR, Max. 1.05:1
Insertion Loss, Max. 0.05 dB (with female 7-16 DIN connectors)
Directivity, Min. 28 dB
Maintenance
47
Specifications, RS-232 Interface
Table 7-27 RS-232 Interface Module
Specifications, IEEE-488 GPIB Interface
Table 7-28 IEEE-488 Interface
Figure 20 High Frequency Derating 1
Logic Levels Meets all EIA Standard RS-232-C specifications
Modes of Operation Switch and bus selectable
Talk Always Allows the 4421 to send to the bus keyboard-initiated
measurements only
Addressable Allows the 4421 to be commanded by an RS-232 interface controller
Connector RS-232 Interface Type
Humidity, Max 95% (non-condensing)
Altitude, Max 10,000 feet (3,000 m)
Temperature Range
Operating
Storage
0 to 50º C (32 to 122º F)
–20 to +50º C (–4 to +122º F)
Dimensions 6.5”L x 4.5” W (165 x 115 mm)
Weight 0.5 lbs (0.23 kg) nominal
Logic Levels Meets all IEEE Standard 488-1978 specifications
Modes of Operation Switch and bus selectable
Talk Only Allows the 4421 to send to the bus keyboard-initiated measurements
only
Addressable Allows the 4422 to be addressed as talker or listener under the
command of an IEEE-488 bus controller
Connector Standard IEEE-488 bus type
Humidity, Max 95% (non-condensing)
Altitude, Max 10,000 feet (3,000 m)
Temperature Range
Operating
Storage
0 to 50º C (32 to 122º F)
–20 to +50º C (–4 to +122º F)
Dimensions 6.5”L x 4.5” W (165 x 115 mm)
Weight, Nominal 0.5 lbs (0.23 kg)
Frequency (MHz)
Load Derating Above 65 MHz
5 & 10 kW Loads
Max. Power (kW)
10 100 1000
0
1
2
3
4
5
6
7
8
9
10
Bird 4421 RF Power Meter
48
Figure 21 High Frequency Derating 2
Table 7-29 Replacement Parts
Description Qty Part Number
Fuse, IEC (5 x 20 mm) Time Lag Type T
115 Vac, T630 mA
230 Vac, T315 mA
1
5A2257-14
5A2257-11
Cord, AC Power
115 Vac
230 Vac Harmonized
1
5-1286
5A2416
Plug, 115 Vac 1 5A2626
Cable, Sensor 1 4421-038
Grommet 1 4421A372
Cordreel 1 4421A383
Casters 4 4421A384
Handle 1 4421A385
IEEE-488 Bus Interface Module 1 4421-489-2
Cable, IEEE-488
2 m
1 m
1
5-1317-2
5-1317-1
RS-232 Bus Interface Module 1 4421-233-1
Cable, RS-232
10 ft.
5 ft.
1
5-1662-2
5-1662-1
Null Modem Kit (RS-232 only) 1 4380-250
Panel Mount Kit 1 4421-250
Battery, C size, NiMH 8 5A1230
Frequency (MHz)
Load Derating Above 65 MHz
1 & 2.5 kW Loads
Max. Power (kW)
10 100 1000
0
0.5
1.0
1.5
2.0
2.5
Maintenance
49
Available Connectors
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
Connector P/N
HN (F) 4240-268
LC (F) 4240-031
BNC-Female 4240-125
BNC-Male 4240-132
C-Female 4240-100
C-Male 4240-110
HN-Female 4240-268
HN-Male 4240-278
LC-Female 4240-031
LC-Male 4240-025
Open Term. # 10-32 Nut 4240-080
N (F) 4240-062
7/16 Jack, IEC Type 169-4 4240-344
LT-Female 4240-018
LT-Male 4240-012
N-Female 4240-062
N-Male 4240-063
SC-Female 4240-090
SMA-Female 4240-336
SMA-Male 4240-334
7/16 Jack, IEC Type 169-4 4240-344
7/16 Plug, IEC Type 169-4 4240-363
TRU 6934 (F) 4240-371
TRU 7958 (F) 4240-372
Mini UHF-Female 4240-346
UHF-Female 4240-050
UHF-Male 4240-179
1-5/8” EIA Fixed 4240-096
1-5/8” EIA Swivel 4240-208
7/8” EIA 4240-002
TNC-Female 4240-156
TNC-Male 4240-160
Bird 4421 RF Power Meter
50
Customer Service
If you need to return the unit for any reason, contact the Bird Service Center
for a return authorization. All instruments returned must be shipped prepaid
and to the attention of Bird Service Center.
Bird Service Center
30303 Aurora Road
Cleveland (Solon), Ohio 44139-2794
Phone: (440) 519-2298
Fax: (440) 519-2326
E-mail: bsc@bird-technologies.com
For the location of the sales office nearest you, give us a call or visit our Web
site at:
http://www.bird-electronic.com
51
Limited Warranty
All products manufactured by Seller are warranted to be free from defects in material and workman-
ship for a period of one (1) year, unless otherwise specified, from date of shipment and to conform to
applicable specifications, drawings, blueprints and/or samples. Seller’s sole obligation under these
warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be
other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement
of parts, adjustment or repairs, or any other work, unless such charges are authorized in advance by
Seller.
If Seller’s products are claimed to be defective in material or workmanship or not to conform to speci-
fications, drawings, blueprints and/or samples, Seller shall, upon prompt notice thereof, either exam-
ine the products where they are located or issue shipping instructions for return to Seller
(transportation-charges prepaid by Buyer). In the event any of our products are proved to be other
than as warranted, transportation costs (cheapest way) to and from Seller’s plant, will be borne by
Seller and reimbursement or credit will be made for amounts so expended by Buyer. Every such claim
for breach of these warranties shall be deemed to be waived by Buyer unless made in writing within
ten (10) days from the date of discovery of the defect.
The above warranties shall not extend to any products or parts thereof which have been subjected to
any misuse or neglect, damaged by accident, rendered defective by reason of improper installation or
by the performance of repairs or alterations outside of our plant, and shall not apply to any goods or
parts thereof furnished by Buyer or acquired from others at Buyer’s request and/or to Buyer’s specifi-
cations. Routine (regularly required) calibration is not covered under this limited warranty. In addi-
tion, Seller’s warranties do not extend to the failure of tubes, transistors, fuses and batteries, or to
other equipment and parts manufactured by others except to the extent of the original manufacturer’s
warranty to Seller.
The obligations under the foregoing warranties are limited to the precise terms thereof. These war-
ranties provide exclusive remedies, expressly in lieu of all other remedies including claims for special
or consequential damages. SELLER NEITHER MAKES NOR ASSUMES ANY OTHER WARRANTY
WHATSOEVER, WHETHER EXPRESS, STATUTORY, OR IMPLIED, INCLUDING WARRANTIES
OF MERCHANTABILITY AND FITNESS, AND NO PERSON IS AUTHORIZED TO ASSUME FOR
SELLER ANY OBLIGATION OR LIABILITY NOT STRICTLY IN ACCORDANCE WITH THE
FOREGOING.
Special Lifetime Warranty - Series 4020, Series 4027A, Series 4027F, and Series
4028 Power Sensor Head
In addition to its standard warranty, the Bird Electronic Corporation warrants its Series 4020, Series
4027A, Series 4027F, and Series 4028 Thruline® Power Sensor Heads for lifetime to original pur-
chaser. This extended warranty is against burnout. For the warranty to apply, the Sensor Head must
be used with the correct Bird Electronic Corporation Display Unit, the maximum power rating of the
Sensor must not be exceeded, the Sensor RF circuit must be properly terminated and the Sensor not
subjected to physical abuse.
Bird Electronic Corporation, at its option, will repair or replace the defective Sensor at its world
Headquarters at 30303 Aurora Road, Solon, Ohio 44139.
The customer is responsible to pay transportation charges to return the defective sensor to Bird.

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