GE Marquette 418793-001 User manual

APEX
Telemetry Transmitter
Service Manual
401566-166 Revision D

T-2 APEX Telemetry Transmitter Revision D
401566-166 15 June1999
NOTE: Due to continuing product innovation, specifications in this manual are
subject to change without notice.
Trademarks Trademarked names appear throughout this document. Rather than list
the names and entities that own the trademarks or insert a trademark
symbol with each mention of the trademarked name, the publisher states
that it is using the names only for editorial purposes and to the benefit of
the trademark owner with no intention of improperly using that
trademark.
900 SC, ACCUSKETCH, AccuVision, APEX, AQUA-KNOT, ARCHIVIST, Autoseq, BABY
MAC, C Qwik Connect, CardioServ, CardioSmart, CardioSys, CardioWindow, CASE, CD
TELEMETRY, CENTRA, CHART GUARD, CINE 35, CORO, COROLAN,
COROMETRICS, Corometrics Sensor Tip, CRG PLUS, DASH, Digistore, Digital DATAQ,
E for M, EAGLE, Event-Link, FMS 101B, FMS 111, HELLIGE, IMAGE STORE,
INTELLIMOTION, IQA, LASER SXP, MAC, MAC-LAB, MACTRODE, MARQUETTE,
MARQUETTE MAC, MARQUETTE MEDICAL SYSTEMS, MARQUETTE UNITY
NETWORK, MARS, MAX, MEDITEL, MEI, MEI in the circle logo, MEMOPORT,
MEMOPORT C, MINISTORE, MINNOWS, Monarch 8000, MULTI-LINK,
MULTISCRIPTOR, MUSE, MUSE CV, Neo-Trak, NEUROSCRIPT, OnlineABG,
OXYMONITOR, Pres-R-Cuff, PRESSURE-SCRIBE, QMI, QS, Quantitative Medicine,
Quantitative Sentinel, RAC RAMS, RSVP, SAM, SEER, SILVERTRACE, SOLAR,
SOLARVIEW, Spectra 400, Spectra-Overview, Spectra-Tel, ST GUARD, TRAM,
TRAM-NET, TRAM-RAC, TRAMSCOPE, TRIM KNOB, Trimline, UNION STATION,
UNITY logo, UNITY NETWORK, Vari-X, Vari-X Cardiomatic, VariCath, VARIDEX, VAS,
and Vision Care Filter are trademarks of GE Marquette Medical Systems, Inc. registered in
the United States Patent and Trademark Office.
12SL, 15SL, Access, AccuSpeak, ADVANTAGE, BAM, BODYTRODE, Cardiomatic,
CardioSpeak, CD TELEMETRY®-LAN, CENTRALSCOPE, Corolation, EDIC, EK-Pro,
Event-Link Cirrus, Event-Link Cumulus, Event-Link Nimbus, HI-RES, ICMMS, IMAGE
VAULT, IMPACT.wf, INTER-LEAD, IQA, LIFEWATCH, Managed Use, MARQUETTE
PRISM, MARQUETTE®RESPONDER, MENTOR, MicroSmart, MMS, MRT, MUSE
CardioWindow, NST PRO, NAUTILUS, O2SENSOR, Octanet, OMRS, PHi-Res, Premium,
Prism, QUIK CONNECT V, QUICK CONNECT, QT Guard, SMART-PAC, SMARTLOOK,
Spiral Lok, Sweetheart, UNITY, Universal, Waterfall, and Walkmom are trademarks of GE
Marquette Medical Systems, Inc.
© GE Marquette Medical Systems, Inc., 1999. All rights reserved.
GE Marquette Medical Systems, Inc.
8200 W. Tower Ave.
Milwaukee, WI 53223 USA
Tel: [phone]
800.558.5120 (USA only)
Fax: [phone]
Marquette Hellige GmbH
Postfach 60 02 65
D-79032 Freiburg
Germany
Tel: [phone]
Fax: [phone]

Revision D APEX Telemetry Transmitter i
401566-166
CONTENTS
1INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Manual Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Responsibility of the Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Equipment Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Warnings, Cautions, and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Service Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Equipment Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
How to Reach Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Customer Support and Equipment Repair Information . . . . . . . . .1-6
Ordering Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Supplies Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
2EQUIPMENT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Battery Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Interface Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Transmitter Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
APEX Oximeter Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Battery Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Underwriters Laboratory, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

CONTENTS
ii APEX Telemetry Transmitter Revision D
401566-166
3MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Equipment Maintenance Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Recommended Maintenance Procedures . . . . . . . . . . . . . . . . . . . . .3-3
Recommended Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Transmitter Operational Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
LED Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Powerup Selftests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
RF Power Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Change Battery LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Battery Current Draw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
RF Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Sideband Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Carrier Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Carrier Frequency Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
RF Signal Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
Communications Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Lead(s) Fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Verify Graph Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Pause Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
Pacemaker Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
ECG Waveform Transmission . . . . . . . . . . . . . . . . . . . . . . . . .3-13
Change Battery Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
Oximeter Operational Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
Accutracker DX NIBP Operational Tests . . . . . . . . . . . . . . . . . . .3-15
Accutracker Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
Pressure Calibration Check . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
Over-Pressure Release Check . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Hardware Time-Out and System Leak Check . . . . . . . . . . . .3-17
Communication Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
PM Inspection Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Repair Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19

CONTENTS
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4TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Controlling Electrostatic Discharge Damage . . . . . . . . . . . . . . . . . . . .4-2
About CMOS Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Reducing ESD Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Before Calling for Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Frequent Lead Fail Events . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Short Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Oximeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
“Check Probe” Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Low Quality Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Probe Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Short Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
No SpO2Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
The Saturation Value is “x” . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Powerup Selftests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Oximeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Accutracker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Power Shutdown During Leads Fail . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
5CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Programming the Transmitter for Use . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Accutracker Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4

CONTENTS
iv APEX Telemetry Transmitter Revision D
401566-166
6UPPER LEVEL ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Versions of the Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
ECG Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
First Amplifier Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Second Amplifier Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Third Amplifier Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Pace Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Digital Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Modulator Drive and Filter Circuit . . . . . . . . . . . . . . . . . . . . . .6-7
RF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Phase Locked Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Frequency Doubler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9
Frequency Modulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
Output Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
Exploded View PN 418793-001A/002A/003A/004A . . . . . . . . . . . . . . .6-11
Block Diagram PN 418793-001A/002A/003A/004A. . . . . . . . . . . . . . .6-14
Parts List PN 418793-001A/002A/003A/004A . . . . . . . . . . . . . . . . . . .6-15
7TRANSMITTER PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
Versions of the Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
Switches, Controls, and Adjustments . . . . . . . . . . . . . . . . . . . . . . .7-2
Parts Location Diagram PN 801278-001A/003A . . . . . . . . . . . . . . . . . .7-3
Parts List PN 801278-001A/003A . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
Parts Location Diagram PN 801278-002A . . . . . . . . . . . . . . . . . . . . . .7-10
Parts List PN 801278-002A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-13
Parts Location Diagram PN 801278-004A . . . . . . . . . . . . . . . . . . . . . .7-17
Parts List PN 801278-004A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20
Schematic Diagram PN SD801278-001A . . . . . . . . . . . . . . . . . . . . . . .7-24
Schematic Diagram PN SD801278-002A . . . . . . . . . . . . . . . . . . . . . . .7-37
Schematic Diagram PN SD801278-004A . . . . . . . . . . . . . . . . . . . . . . .7-38

CONTENTS
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8OXIMETER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Versions of the Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Theory of Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Pulse Oximetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Packaged Parts List 420364-001A/421049-002A . . . . . . . . . . . . . . . . . .8-5
Upper Level Parts List 420364-001A . . . . . . . . . . . . . . . . . . . . . . . . . . .8-6
Exploded View 420364-001A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-7
Upper Level Parts List 421049-002A . . . . . . . . . . . . . . . . . . . . . . . . . . .8-8
Exploded View 421049-002A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9
Interconnection Diagram 421049-001A/002A. . . . . . . . . . . . . . . . . . . .8-10
PCB Parts List 421191-001A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-11
Parts Location Diagram 421191-001A . . . . . . . . . . . . . . . . . . . . . . . . .8-13
PCB Schematic Diagram PN 2456-000A . . . . . . . . . . . . . . . . . . . . . . .8-16

CONTENTS
vi APEX Telemetry Transmitter Revision D
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Revision D APEX Telemetry Transmitter 1-1
401566-166
1INTRODUCTION
CONTENTS
Manual Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Responsibility of the Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Equipment Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Warnings, Cautions, and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Service Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Equipment Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
How to Reach Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Customer Support and Equipment Repair Information . . . . . . . . .1-6
Ordering Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Supplies Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

INTRODUCTION: Manual Information
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Manual Information
Revision History Each page of this manual has a revision letter located at the bottom of
the page. It identifies the revision level of the entire manual. This may be
important if you have different manuals and you don’t know which is the
most current.
For the initial release, all pages have the revision letter A. For the
second update, all pages receive the revision letter B. The latest letter of
the alphabet added to the table below corresponds to the most current
revision.
Purpose This manual provides technical information for service representatives
and technical personnel involved in maintaining the APEX S
transmitter.
Users of this manual are expected to have a background in electronics,
including analog and digital circuitry with RF and microprocessor
architectures.
This manual does not include extensive information on the circuit boards
that comprise the transmitter assembly. These assemblies are not field
repairable and require return to a GE Marquette service facility for any
repairs.
Revision History
Revision Date Comment
A26 August 1997 Initial Release of the APEX S transmitter
B 1 June 1998 Added references for the APEX Oximeter
C1 February 1999 Added service test procedures for
Accutracker NIBP module in Chapter 3,
“Maintenance” and note on error codes in
Chapter 4, “Troubleshooting.”Added
Annual Calibration instructions for the
Accutracker in Chapter 5, “Calibration.”
Changed all Marquette references to “GE
Marquette.” Deleted chapter content
information in Chapter 1, “Introduction.”
D 15 June 1999 Revised Accutracker details to reflect
changes in unit labeling. Updated “How
to Reach Us” in Chapter 1.

INTRODUCTION: Safety Information
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Safety Information
Responsibility of the
Manufacturer GE Marquette Medical Systems is responsible for the effects of safety,
reliability, and performance only if:
• assembly operations, extensions, readjustments, modifications, or
repairs are carried out by persons authorized by GE Marquette
Medical Systems, Inc;
• the electrical installation of the relevant room complies with the
requirements of the appropriate regulations; and
• the device is used in accordance with the instructions for use.
Intended Use Follow the directives stated below when using any of the transmitters.
• These devices are intended for use under the direct supervision of a
licensed health care practitioner.
• These devices is not intended for home use.
• Federal law restricts these devices to be sold by or on the order of a
physician.
• Contact GE Marquette Medical Systems for information before
connecting any devices to the equipment that are not recommended
in this manual.
• Parts and accessories used must meet the requirements of the
applicable IEC 601 series safety standards, and/or the system
configuration must meet the requirements of the IEC 60601-1-1
medical electrical systems standard.
• Periodically, and whenever the integrity of the device is in doubt, test
all functions.
• The use of ACCESSORY equipment not complying with the
equivalent safety requirements of this equipment may lead to a
reduced level of safety of the resulting system. Consideration
relating to the choice shall include:
◆use of the accessory in the PATIENT VICINITY; and
◆evidence that the safety certification of the ACCESSORY has
been performed in accordance to the appropriate IEC 60601-1
and/or IEC 60601-1-1 harmonized national standard.
• If the installation of the equipment, in the USA, uses 240V rather
than 120V, the source must be a center-tapped, 240V, single-phase
circuit.

INTRODUCTION: Safety Information
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Equipment Symbols The following symbols appear on the transmitter.
Warnings, Cautions,
and Notes Warnings, cautions, and notes are used throughout this manual to
designate a degree or level of hazardous situations. Hazard is defined as
a source of potential injury to a person.
WARNING
indicates a potential hazard or unsafe practice which, if
not avoided, could result in death or serious injury.
CAUTION
indicates a potential hazard or unsafe practice which, if
not avoided, could result in minor personal injury or
product/property damage.
NOTE
provides application tips or other useful information to
assure that you get the most from your equipment.
ATTENTION: Consult accompanying documents before using the
equipment.

INTRODUCTION: Service Information
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Service Information
Service
Requirements Follow the service requirements listed below.
• Refer equipment servicing to GE Marquette’s authorized service
personnel only.
• Any unauthorized attempt to repair equipment under warranty voids
that warranty.
• It is the user’s responsibility to report the need for service to GE
Marquette Medical Systems or to one of their authorized agents.
• Failure on the part of the responsible individual, hospital, or
institution using this equipment to implement a satisfactory
maintenance schedule may cause undue equipment failure and
possible health hazards.
• Regular maintenance, irrespective of usage, is essential to ensure
that the equipment will always be functional when required.
Equipment
Identification Every GE Marquette Medical Systems device has a unique serial number
for identification. The serial number appears on the product label on the
base of each unit.
Warranty 1 year.
Month
Manufactured
A = January
B = February
C = March
D = April
E = May
F = June
G = July
H = August
J = September
K = October
L = November
M = December
Year
Manufactured
1 = 1991
2 = 1992
3 = 1993
(and so on)
Product Code
Two-character
product descriptor
Product
Sequence
Number
Manufacturing
number (of total
units
manufactured.)
Device Characteristics
One or 2 letters that further
describe the unit, for
example:
P = prototype not conforming
to marketing specification
R = refurbished equipment
S = special product
documented under Specials
part numbers
U = upgraded unit
Division
F = Cardiology
G = Monitoring
J = G.W. Labs
D 1 XX 0005 G XX

INTRODUCTION: How to Reach Us
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How to Reach Us
Customer Support
and Equipment
Repair Information
If you have questions about your monitoring equipment or if you need
service for equipment repair call:
Ordering Service
Parts Service parts are items that are not expended in the normal operation of
the product. They are generally replacements for defective or
malfunctioning items inside the product. Service parts include PCB
assemblies, electronic components, internal cables and harnesses,
software or firmware, and operator and service manuals.
A part number for the item to be replaced is necessary for ordering a
service part. If the part number for the desired item is unobtainable, the
following will be necessary to order the item:
• model and serial number of the equipment
• part number/name of the assembly where the item is used,
• item name, and
• where applicable, reference designation (e.g., R13, S12, U32).
Supplies Information Supply items are generally those items used during normal operation of
a product. Leadwires, electrodes, patient cables, printer paper, Aqua-
Knot water traps, airway adapters, and calibration gases are examples of
supply items.
Make telephone inquiries about supply items at:
U.S.A and Canada: 800-558-7044 (24-hour service)
Other countries: 561-575-5000 (during U.S. business hours only)
or contact your local sales and service
representative
Local sales and service
representative: Name: ______________________________________
Telephone: ___________________________________
U.S. only: 800-558-5102
Outside U.S.: 414-521-6856 (or contact your local sales and service
representative)

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2EQUIPMENT OVERVIEW
CONTENTS
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Battery Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Interface Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Transmitter Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
APEX Oximeter Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Battery Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Underwriters Laboratory, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

EQUIPMENT OVERVIEW: Overview
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Overview
Features The APEX S transmitter is designed to collect ECG data from a patient
and relay that information to a receiver assembly. Either one or three
ECG leads are gathered. With a three-wire leadwire set, the transmitted
signal can be either lead I, II, or III. Leads I, II, III, V, aVR, aVL, and
aVF are the possible lead selections for the five-wire leadwire set
connected to the APEX S transmitter.
The following figure locates many of the transmitter’s user interface
components. Descriptions of each item follows.
Battery
Compartment The battery compartment cover is located on the bottom of the
transmitter.
Once the cover has been opened, two AA alkaline batteries are installed
in the transmitter. When the batteries are installed the transmitter
performs a self-test and then begins transmitting data.

EQUIPMENT OVERVIEW: Overview
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Indicators The APEX transmitter indicators are described below.
• CHANGE BATTERY LED. This indicator begins to flash when the
battery voltage level drops below 1.9 Volts. The batteries should be
replaced within 30 minutes after the CHANGE BATTERY LED
begins flashing.
• GRAPH Control. When this button is pressed the LEAD STATUS
and CHANGE BATTERY LEDs flash twice to acknowledge the
action. Also the graph command is sent to the receiving system to
trigger a graph run.
• VERIFY LEADS control. When this button is pressed the LEAD
status and CHANGE BATTERY LEDs flash twice to acknowledge
the action. Then the lead status is displayed by these LEDs for 1
minute. The LEDs representing good ECG leads remain illuminated
for the 1 minute period. Bad leads are identified by the associated
LED being turned off.
• LEAD STATUS LEDs. When the VERIFY LEADS control is pressed,
these LEDs are illuminated if the associated lead signal is good.
• PAUSE ALARMS LED. Pressing both the VERIFY LEADS and the
GRAPH controls simultaneously results in an alarm pause condition
(in which the alarms are disabled) and the PAUSE ALARMS LED
starts flashing. This condition lasts for 5 minutes.
• When the PAUSE ALARMS LED stops flashing the condition is over.
• To end the pause alarms condition prematurely, both the VERIFY
LEADS control and GRAPH controls are pressed again.
Interface Port This connector is used to connect the transmitter to the APEX
Programming Device. The TTX number and desired reference lead are
programmed using the APEX Programming Device.
This connector may also be used to connect additional parameter devices
to the APEX transmitter. Refer to “Accessories” on the following pages
for more information.
Transmitter Versions There are four versions the APEX S transmitter assembly.
Upper Level
Part Number Frequency Type Frequency Range
418793-001 VHF for U.S. 174.05 to 215.95 MHz
418793-002 VHF international 216.00 to 242.00 MHz
418793-003 VHF for U.K. 173.30, 173.75, 173.85, 173.95 MHz
418793-004 UHF international 430.00 to 474.00 MHz

EQUIPMENT OVERVIEW: APEX Oximeter Accessory
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APEX Oximeter Accessory
An optional accessory to the Apex S transmitter is the APEX Oximeter
attachment as shown below.
Interconnection Do the following to connect the APEX oximeter to the APEX S
transmitter.
1. Connect the SpO2probe to the APEX oximeter by plugging the non-
sensor end of the probe into the 9-pin connector on the top of the
APEX oximeter.
2. Connect the supplied interconnection cable to the APEX oximeter 5-
pin connector labeled INT (interface).
3. Connect the other end of the supplied interconnection cable to APEX
S transmitter 5-pin connector labeled INT (interface).
NOTE
You must connect the APEX Oximeter to a transmitter
labeled APEX S. The APEX Oximeter does not function
with transmitters labelled APEX 3 or APEX 5.
Battery
Compartment The battery compartment cover is located on the bottom of the APEX
oximeter. Once the cover has been opened, two AA alkaline batteries are
installed in the transmitter.
Power Display
On/Off
Pulse Rate
SpO %
2
Perfusion
oximeter
2

EQUIPMENT OVERVIEW: APEX Oximeter Accessory
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Indicators The APEX oximeter indicators are described below.
•POWER. Pressing the POWER button turns ON the battery power
to the APEX oximeter. To turn OFF all power to the APEX oximeter,
press and hold the POWER button for two seconds.
•DIGITAL DISPLAY. The display turns ON for a one minute when
the APEX oximeter is first powered up and displays oxygen
saturation and pulse rate. After one minute, the display will turn
OFF, but power to the oximeter remains which is indicated by the
flashing power LED in the upper left corner of the display.
•DISPLAY ON/OFF. This button has the following functions:
◆Press the DISPLAY ON/OFF button to turn the display ON for
one minute.
◆To turn the display on continuously, press and hold the
DISPLAY ON/OFF button for two seconds. The POWER LED on
the digital display will turn OFF to indicate continuous mode.
◆To turn the display OFF at any time, press the DISPLAY ON/
OFF button again.
•PERFUSION LED. The perfusion LED indicates the strength of the
patient’s SpO2signal.
◆Green indicates acceptable strength pulse.
◆Yellow indicates a SpO2signals of marginal quality.
◆Red indicates the SpO2signals is weak or the quality is very
poor.
310A
Digital Display
Display On/Off
Perfusion LED
Power

EQUIPMENT OVERVIEW: Technical Specifications
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Technical Specifications
Physical Specifications
Item Description
Height 12.7 cm (5.0 in)
Width 6.9 cm (2.7 in)
Depth 2.0 cm (0.8 in)
Weight 130 grams (4.6 ounces) without batteries or leadwires
Environmental Specifications
Item Description
Operating ambient
temperature 0° to 50° Celsius (32° to 122° Fahrenheit)
Storage temperature –20° to 60° Celsius (–4° to 140° Fahrenheit)
Operating Relative
Humidity 5% to 95% (noncondensing)
Storage Relative
Humidity 5% to 95% (noncondensing)
Water Immersion Water resistant
Battery Specifications
Item Description
Type ANSI/NEDA 15A, 1.5V AA alkaline (2 required)
Life 60 hours (typical)
Transmission Specifications
Item Description
Frequency Range For –001 units: 174.050 to 215.950 MHz (US TV channels 7 to 13)
For –002 units: 216.000 to 242.000 MHz
For –003 units: 173.30, 173.75, 173.85, 173.95 MHz
For –004 units: 430.00 to 474 MHz
Channel Spacing 100 kHz
Frequency Stability ±0.001% of assigned channel frequency
Power Output For –001 units:1500 µV/m at 3 meters
For –002 units: per country specifications
For –003 units: < 1 mW conducted
For –004 units: < 1 mW conducted