GE RT 6000_6800 SERVICE MANUAL_SM_P9030FB_1 RT6800 Service Manual P9030FB Revision 1

Technical
Publications

P9030FB
Revision 1

GE Medical Systems

RT6000 / RT6800
Service Manual

CopyrightE1989 By General Electric Company

Operating Documentation

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

LIST OF EFFECTIVE PAGES

REVISION DATE

REV 0 December 29, 1989...........

REV 1 September 28,1990...........

PAGE REV PAGE REV PAGE REV PAGE REV

Title page 1.......

GE Logo page -...

A1...............

itoii 0............

iii to v 1...........

vi 0...............

vii to ix 1..........

INTRODUCTION

i0................

1-1 0............

PREINSTALLATION

i0................

2-1 to 2-3 0.....

2-4 t.............

2-5 0............

2-6 to 2-7 1.....

2-8 to 2-9 0.....

INSTALLATION

i0................

3-1 to 3-11 0....

FUNCTIONAL
CHECKS

itoii 0............

4-1 to 4-24 0....

4-25 1...........

4-26 to 4-43 0...

THEORY

itoii 1............

5-1 to 5-5 0.....

5-6 to 5-67 1....

SERVICE
ADJUSTMENTS

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6-1 to 6-5 0.....

SCHEMATICS

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7-1 to 7-5 1.....

DIAGNOSTICS

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8-1 0............

RENEWAL PARTS

i1................

9-1 to 9-59 1....

PERIODIC
MAINTENANCE

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10-1 0...........

A

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

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TABLE OF CONTENTS

SECTION TITLE PAGE

TABLE OF CONTENTS i...................................................................

LIST OF ILLUSTRATIONS vii................................................................

LIST OF TABLES VIII.......................................................................

CHAPTER 1 - INTRODUCTION

1-1 SERVICE MANUAL CONTENTS 1-1..............................................

CHAPTER 2 - PREINSTALLATION

2-1 FORWARD 2-1................................................................

2-2 GENERAL DESCRIPTION 2-1...................................................

2-2-1 Ultrasound Imaging 2-1..............................................

2-2-2 Doppler Feature 2-1................................................

2-2-3 Imaging Functions 2-1...............................................

2-3 ELECTRICAL SPECIFICATIONS 2-3..............................................

2-3-1 Power Supply 2-3...................................................

2-3-2 Leakage Current 2-3................................................

2-3-3 Power Line Requirements 2-3........................................

2-3-4 Transient Protection 2-3..............................................

2-3-5 Facility Power Receptacle 2-4.........................................

2-4 PHYSICAL SPECIFICATIONS 2-4................................................

2-4-1 Operating Conditions 2-4............................................

2-4-2 Shipping and Storage Requirements 2-6...............................

2-5 RECOMMENDED UL TRASOUND ROOM LAYOUT 2-6..............................

2-5-1 Optional Desirable Ultrasound Room Facilities 2-7......................

2-5-2 Floor Loading 2-7...................................................

2-5-3 Recommended and Alternate Ultrasound Console Floor Plans 2-7........

CHAPTER 3 - INSTALLA TION

3-1 INTRODUCTION 3-1...........................................................

3-2 AVERAGE INSTALLA TION TIME 3-1..............................................

3-3 WARNINGS 3-1...............................................................

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SECTION TITLE PAGE

CHAPTER 3 - INSTALLATION

3-4 EQUIPMENT INSPECTION/DAMAGE REPORTING 3-5.............................

3-4-1 U.S. Operations 3-5.................................................

3-4-2 International Operations 3-6..........................................

3-4-3 Claim Procedure 3-6................................................

3-5 UNPACKING RT 6000/RT 6800 COMPONENTS 3-6................................

3-5-1 Normal Unpacking Procedure 3-6.....................................

3-6 ASSEMBLING THE RT 6000/RT 6800 3-7.........................................

3-7 MOVING THE RT 6000/RT 6800 3-7..............................................

3-7-1 Moving the RT 6000/RT 6800 To Another Room 3-7.....................

3-7-2 Transporting the RT 6000/RT 6800 3-8.................................

3-8 ELECTRICAL SAFETY TESTS 3-8................................................

3-8-1 Leakage Current 3-8................................................

3-8-2 Ground Continuity 3-8...............................................

3-8-3 Facility Power Wiring Test 3-8.........................................

3-8-4 Transducer Source Leakage Current 3-9...............................

3-8-5 Chassis Source Leakage Current Test 3-10.............................

3-8-6 Ground Continuity Test 3-11..........................................

(Continued)

CHAPTER 4 - FUNCTIONAL CHECKS

4-1 INTRODUCTION 4-1...........................................................

4-1-1 Required Equipment 4-1.............................................

4-2 FUNCTIONAL CHECK PROCEDURES 4-1........................................

4-2-1 Power Up Check 4-1................................................

4-2-2 Acoustic Power (%) Potentiometer 4-2.................................

4-2-3 Sector Angle Switch 4-2.............................................

4-2-4 Frame Averaging 4-3................................................

4-2-5 Illumination Control 4-3..............................................

4-2-6 ECG Off/On Control (Units W/ECG Option Only) 4-3.....................

4-2-7 ECG Units: ECG Gain 4~.............................................

4-2-8 ECG Units: Sync 1/Sync 2 Controls 4-4................................

4-2-9 ECG Units: ECG Video/SCR Position Potentiometers 4-6.................

4-2-10 PCG Units: PCG Off/On Switch: PCG Gain Pot 4-7......................

4-2-11 PCG Units: PCG Gain/Filter checks 4-8................................

4-2-12 Auxiliary Option Units Only: AUX1 Controls 4-9.........................

4-2-13 Auxiliary Option Units Only: AUX2 Controls 4-10........................

4-2-14 Gen Meas and Gen Calc Controls 4-10................................

4-2-15 L, R, Proc Controls 4-11.............................................

4-2-16 Mic Control (Perform if headphones available) 4-15.....................

4-2-17 Display Block 4-15..................................................

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SECTION TITLE PAGE

CHAPTER 4 - FUNCTIONAL CHECKS

4-2 FUNCTIONAL CHECK PROCEDURES (Contineud)

4-2-18 Image Block 4-15...................................................

4-2-19 Time Gain Compensation (TGC) Controls 4-16..........................

4-2-20 Auto Control 4-17...................................................

4-2-21 Mode Controls 4-17.................................................

4-2-22 Program Control 4-18................................................

4-2-23 Sweep Speed, Pause, Update, Freeze Controls 4-18....................

4-2-24 Circ/Area: Distance/Depth Controls 4-19...............................

4-2-25 Doppler Units: Doppler Controls 4-19..................................

4-2-26 VTR (VCR) Equipped Units Only: Front panel VTR Controls 4-22..........

4-2-27 SCR (LSR) Equipped Units Only: SCR Controls 4-22....................

4-2-28 Date Change Test 4-23..............................................

4-2-29 Time Change Check 4-23............................................

4-2-30 Hospital Name Check 4-24...........................................

4-2-31 Polaroid Equipped Units Only: Film Development Beep Time Check 4-24..

4-2-32 System Parameter Test 4-25..........................................

4-2-33 Transducer Parameter Display Test 4-25...............................

4-2-34 Abbreviation Display Test 4-25........................................

4-2-35 Echo Level Measurement (in Traced Area) Test 4-25.....................

4-2-36 Echo Level Measurement (Within 3 mm Box) Test 4-26...................

4-2-37 Echo Level Histogram (For Traced Area) Test 4-26.......................

4-2-38 Echo Level Histogram (3 mm Box: Histogram) Test 4-27.................

4-2-39 Gray Background Level Test 4-28.....................................

4-2-40 2D Gray Background Level Control Test 4-28...........................

4-2-41 MĊmode Gray Background Level Control Test 4-28.....................

4-2-42 Doppler Units: Doppler Gray Background Level Control Test 4-29.........

4-2-43 Help Menu Test 4-29.................................................

4-2-44 2D Image Invert Control Test 4-30.....................................

4-2-45 Doppler Units: Doppler Image Invert Control Test 4-30...................

4-2-46 MĊmode Image Inversion Test 4-31...................................

4-2-47 SCR Equipped Units Only: SCR PRINT (Comments on Stripchart) Test 4-31

4-2-48 SCR Equipped Units Only: SCR PRINT (FREEZE" KEY) Test 4-32........

4-2-49 SCR Equipped Units Only: SCR PRINT (Page Print after Strip Chart Recording)

Test 4-32...........................................................

4-2-50 VCR Equipped Units Only: VCR Search Speed Test 4-32.................

4-2-51 2D Image Size Test 4-33.............................................

4-2-52 SECTOR/PRGM Test 4-33............................................

4-2-53 Acoustic Power Display Test 4-34.....................................

4-2-54 Error Display Time Test 4-34..........................................

4-2-55 Doppler Units: Doppler Frequency Marker Test 4-35.....................

4-2-56 2D Transducer Parameter Test 4-35....................................

4-2-57 MĊMode Parameter Preset Test 4-35..................................

4-2-58 Doppler Units: Doppler Parameter Preset Test 4-36......................

(Continued)

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SECTION TITLE PAGE

CHAPTER 4 - FUNCTIONAL CHECKS

4-2 FUNCTIONAL CHECK PROCEDURES (Continued)

4-2-59 Dotted Line Between Measurement Cursors Test 4-37...................

4-2-60 Register Abbreviations Test 4-37......................................

4-2-61 Register Footswitch Test . 4-37........................................

4-2-62 35 mm Polaroid/35 mm Equipped Units Only: Register Record

by Polaroid/35 mm Test 4-38.........................................

4-2-63 Pattern Package Test 4-38............................................

4-2-64 MĊMode Peak Hold Control Test 4-39.................................

4-2-65 2D Edge Enhancement Test 4-39.....................................

4-2-66 MĊMode Edge Enhancement Test 4-40...............................

4-2-67 SCR Equipped Units Only: SCR Edge Enhancement Test 4-40............

4-2-68 2D Echo Limiter Test: (Phantom Required) 4-41.........................

4-2-69 MĊMode Echo Limiter Test 4-41......................................

4-2-70 2D Grayscale Mapping Test 4-42......................................

4-2-71 MĊMode Grayscale Mapping Test 4-42................................

(Continued)

CHAPTER 5-THEORY

5-1 INTRODUCTION 5-1...........................................................

5-1-1 Cardiographic Scanner 5-1...........................................

5-1-2 Scanning Functions 5-1..............................................

5-2 PRINCIPLES OF ULTRASOUND IMAGING 5-1.....................................

5-2-1 Ultrasound Wave Travel 5-1..........................................

5-2-2 Reflection 5-1.......................................................

5-2-3 Ultrasound Display Types 5-2.........................................

5-2-4 Beam Focusing 5-4.................................................

5-2-5 Echo Signal Processing 5-4..........................................

5-2-6 Time Gain Compensation (TGC)/Time Frequency Compensation (TFC) 5-4

5-2-7 Doppler Operation 5-4...............................................

5-2-8 Optional Color Flow Operation 5-5....................................

5-3 RT 6000/RT 6800 SYSTEM DESCRIPTION 5-8.....................................

5-3-1 RT 6000/RT 6800 Card Cage 5-9......................................

5-3-2 System Block Diagram 5-10..........................................

5-4 PC BOARD ASSY DESCRIPTIONS 5-14..........................................

5-4-1 Transmitter (TRA) Assy 5-15..........................................

5-4-2 High Voltage Power Supply Assy 5-15.................................

5-4-3 Primary Delay Sum (PDS) Assy 5-17...................................

5-4-4 Continuous Dynamic Aperture & Focus (CDAF) Assy 5-18................

5-4-5 Crosspoint Switch (XPSW) Assy 5-19..................................

5-4-6 Logarithmic Amplifier (LOG) Assy 5-20.................................

5-4-7 Color Scan Converter Controller (CSCC) Assy 5-23.....................

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SECTION TITLE PAGE

CHAPTER 5 - THEORY

5-4 PC BOARD ASSY DESCRIPTIONS (Continued) 5-14...............................

5-4-8 Frame Memory 3 (FM3) Assy 5-28.....................................

5-4-9 Color Video (CVDO) Assy 5-29........................................

5-4-10 Master Controller (MST) Assy 5-34....................................

5-4-11 Input/Output Processor (IOP) Assy 5-38...............................

5-4-12 Input/Output Connector (I/O CONN) Assy 5-41.........................

5-4-13 Real Time Controller (RTC) 5-42......................................

5-4-14 Color Doppler (CDOP) Assy (Optional) 5-44............................

5-4-15 Audio Assy 5-47....................................................

5-4-16 Fast Fourier Transform (FFT) Assy 5-50................................

5-4-17 Physiological Signal Isolation Amplifier (PSIA) 5-52......................

5-4-18 Physiological Signal Scale Amplifier 2 (PSSA2) Assy 5-54................

5-4-19 Waveform Display 2 (WD2) Assy 5-56..................................

5-4-20 Recorder Scan Converter (RSC) Assy 5-57.............................

5-4-21 Video Tape Recorder Playback (VTR PB) Assy 5-62.....................

5-4-22 Connector (CONN) Assy 5-66........................................

(Continued)

CHAPTER 6 - SERVICE ADJUSTMENTS

6-1 INTRODUCTION 6-1...........................................................

6-2 POWER SUPPLY ADJUSTMENTS 6-1............................................

6-2-1 Power Supply Access 6-1............................................

6-2-2 5 V, 30 A Power Supply PS0 Adjustment 6-3............................

6-2-3 5 V, 30 A Power Supply PS1 Adjustment 6-3............................

6-2-4 5 V,10 A Power Supply PS2 Adjustment 6-4............................

6-2-5 15 V,4APower Supply PS3 Adjustment 6-4............................

6-2-6 Ċ15 V,4APower Supply PS4 Adjustment 6-5..........................

6-2-7 Ċ5 V, 20 A Power Supply PS5 Adjustment 6-5..........................

6-2-8 12 V, 2.5 A Power Supply PS6 Adjustment 6-5..........................

CHAPTER 7 - SCHEMATICS

7-1 OPERATOR CONSOLE ASSY (RT 6000/RT 6800) 7-1..............................

CHAPTER 8 - DIAGNOSTICS

8-1 INTRODUCTION 8-1...........................................................

8-1-1 Test Patterns 8-1....................................................

8-2 PROCEDURE 8-1..............................................................

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SECTION TITLE PAGE

CHAPTER 9 RENEWAL PARTS

RT 6000/RT 6800 9-1................

OPERATOR CSL ASSY 9-2...........

VIDEO DISPLAY MONITOR ASSY 9-27.

CROSS REFERENCE 9-31............

T3 NUMBERS 9-33...................

CHAPTER 10 - PERIODIC MAINTENANCE

10-1 INTRODUCTION 10-1................

10-1-1 Periodic Maintenance 10-1.
10-1-2 Reference Chapters 10-1...

10-2 PERIODIC MAINTENANCE PROCEDURE 10-1....................................

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TABLE OF CONTENTS

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LIST OF ILLUSTRATIONS

SECTION TITLE PAGE

CHAPTER 2 - PREINSTALLATlON

2-2 2-1 RT 6000/RT 6800 PICTORIAL VIEW 2-2................................

2-4 2-2 RT 6000/RT 6800 DIMENSIONS 2-5...................................

2-5 2-3 RECOMMENDED ULTRASOUND FLOOR PLAN 2-8.....................

2-4 ALTERNATE, SPACE SAVING ULTRASOUND FLOOR PLAN 2-9...........

CHAPTER 4 - FUNCTIONAL CHECKS

4-2 4-1 SUB PANEL 4-2.....................................................

4-2 SECTOR PATTERN 4-2..............................................

4-3 ECG PATTERN-1 4-4...............................................

4-4 ECG PATTERN-2 4-5...............................................

4-5 SYNC 1 4-5........................................................

4-6 SYNC 1 AND SYNC 2 4-6............................................

4-7 PCG TEST SIGNAL 4-8..............................................

4-8 AUX1/AUX2 TEST PATTERN 4-10.....................................

4-9a CARDIAC PATTERNS-1 4-12........................................

4-9b CARDIAC PATTERNS-2 4-13........................................

4-10 CARDIAC PATTERN-3 4-14..........................................

4-11 PROC CONTROL 4-14...............................................

CHAPTER 5 - THEORY

5-1 5-1 ILLUSTRATION 5-3..................................................

5-2 COLOR FLOW MAPPING SUBSYSTEM 5-6 to 5-7.....................

5-3 RT 6000/RT 6800 MAJOR COMPONENTS 5-8..........................

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LIST OF ILLUSTRATIONS

SECTION TITLE PAGE

CHAPTER 5 Ċ THEORY

5-1 5-4 RT 6000/RT 6800 SYSTEM BLOCK DIAGRAM 5-12 to 5-13..............

5-5 TRANSMITTER ASSEMBLY BLOCK DIAGRAM 5-15.....................

5-6 HIGH VOLTAGE (HV) POWER SUPPLY BLOCK DIAGRAM 5-16...........

5-7 PRIMARY DELAY SUM (PDS) ASSY BLOCK DIAGRAM 5-17..............

5-8 CDAF ASSY BLOCK DIAGRAM 5-19...................................

5-9 CROSSPOlNT SWITCH (XPSW) ASSY BLOCK DIAGRAM 5-20............

5-10 LOGARlTHMlC AMPLIFIER (LOG) BLOCK DIAGRAM 5-22................

5-11 CSCC ASSY BLOCK DIAGRAM 5-24 to 5-25..........................

5-12 CBFM ASSY BLOCK DIAGRAM 5-27..................................

5-13 FRAME MEMORY 3 (FM3) BLOCK DIAGRAM 5-29......................

5-14 CVDO ASSY BLOCK DIAGRAM 5-32 to 5-33..........................

5-15 MASTER CONTROLLER (MST) ASSY BLOCK DIAGRAM 5-36 to 5-37....

5-16 lOP ASSY BLOCK DIAGRAM 5-40.....................................

5-17 l/O CONNECTOR ASSY BLOCK DIAGRAM 5-41........................

5-18 RTC ASSY BLOCK DIAGRAM 5-43....................................

5-19 COLOR DOPPLER ASSY BLOCK DIAGRAM 5-46........................

5-20 AUDIO ASSY BLOCK DIAGRAM 5-48 to 5-49..........................

5-21 FAST FOURIER TRANSFORM (FFT) ASSY BLOCK DIAGRAM 5-51........

5-22 PSIA ASSY BLOCK DIAGRAM 5-53....................................

5-23 PSSA2 ASSY BLOCK DIAGRAM 5-55..................................

5-24 WAVEFORM DISPLAY 2 (WD2) ASSY BLOCK DIAGRAM 5-57.............

5-25 RECORDER SCAN CONVERTER (RSC) ASSY BLOCK

DIAGRAM 5-60 to 5-61...........

5-26 VTR PB ASSY BLOCK DIAGRAM 5-64 to 5-65.........................

5-27 CONNECTOR (CONN) ASSY BLOCK DIAGRAM 5-67....................

(Continued)

(Continued)

CHAPTER 6 - SERVICE ADJUSTMENTS

6-2 6-1a POWER SUPPLY COVER REMOVAL 6-2...............................

6-1b LOCATION OF RT 6000/RT 6800 POWER SUPPLIES 6-2.................

6-2 RT 6000/RT 6800 POWER SUPPLIES (RIGHTHAND SIDE VIEW) 6-3......

6-3 RT 6000/RT 6800 POWER SUPPLY (REAR VIEW) 6-4....................

6-4 RT 6000/RT 6800 POWER SUPPLIES (LEFTHAND SIDE VIEW) 6-5........

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LIST OF TABLES

SECTION TITLE PAGE

CHAPTER 2 - PREINSTALLATlON

2-4 2-1 SHIPPING REQUIREMENTS 2-6......................................

2-5 2-2 ULTRASOUND ROOM REQUIREMENTS 2-6...........................

CHAPTER 3 - INSTALLATION

3-3 3-1 RT 6000/RT 6800 INSTALLATION CHECKLIST 3-1......................

3-4 3-2 DOMESTIC SHIPPING DAMAGE REPORTING 3-5......................

3-8 3-3 TRANSDUCER SOURCE LEAKAGE CURRENT TEST 3-9................

3-4 CHASSIS SOURCE LEAKAGE CURRENT TEST 3-10....................

CHAPTER 5 - THEORY

5-3 5-1 PC BOARD LOCATIONS 5-9..........................................

5-2 RT 6000/RT 6800 SUBSYSTEMS 5-10.................................

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TABLE OF CONTENTS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

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1-1 SERVICE MANUAL CONTENTS

This manual provides service information on the RT 6000/RT 6800 Echocardiographic Ultrasound Scanning
System. It contains the following chapters:

1.

Chapter 2, Preinstallation:

installation;

2.

Chapter 3, Installation:

checklist;

3.

Chapter 4, Functional Checks:

installation, or as required during servicing and periodic maintenance;

4.

Chapter 5, Theory of Operation:

5.

Chapter 6, Service Adjustments:

potentiometers and other adjustable elements;

6.

Chapter 7, Schematics:

Contains physical and electrical requirements that should be considered prior to

Contains a complete RT6000/RT6800 installation procedure with installation

Contains functional checks that should be performed as part of the

Contains functional explanations of the RT 6000/RT 6800 electronics;

Contains adjustment procedures for all field adjustable RT 6000/RT 6800

Contains copies of the RT 6000/RT 6800 schematics;

7.

Chapter 8, Diagnostics:

6000/RT6800;

8.

Chapter 9, Parts List:

9.

Chapter 10, Periodic Maintenance:

Contains a complete list of replacement parts for the RT 6000/RT 6800;

Contains troubleshooting information for the analog and digital sections of the RT

Provides periodic maintenance procedures for the RT 6000/RT 6800.

1-1

INTRODUCTION

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

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2-1 FORWARD

This chapter describes various general electrical, operational, and environmental considerations that should be
considered before installing the RT 6000/RT 6800 Ultrasound Unit.

2-2 GENERAL DESCRIPTION

The RT 6000/RT 6800 is an echocardiographic ultrasound scanner designed to aid the physician in diagnosing
cardiovascular diseases. See Illustration 2Ċ1 for a pictorial view of the machine.

2-2-1 Ultrasound Imaging

RT 6000/RT 6800 allows the physician to see into" the patient's body, using high frequency ultrasound imaging.
When the physician places the transduceron a patient's skin, acoustic pulses are transmitted into the body,
reflected, and returned to the transducer. These returns, called echoes, are processed, amplified, and projected on
a videomonitor toform animage of the area scanned in the patient's body. (A video tape recorder, Page Printerand
Cinevision are available as options for permanently recording the image).

2-2-2 Doppler Feature

The Doppler feature permits the physician to analyze blood flow velocity, pressure, heart valve leakage, and other
cardiac parameters by focusing the transducer beam on an area of blood flow. It then determines the amplitude and
frequency shifts of the returning echoes and correlates these to blood volume, flow velocity and flow direction.

2-2-3 Imaging Functions

All necessary imaging functions are performed by the RT 6000/RT 6800 console and its transducers. The console
front panel contains operator controls for optimizing the image and a keyboard for entering data onto the image.
Selected key LEDs illuminate when their respective key is pressed. Unacceptable keyboard entries trigger a beeper
alarm. In addition, a graphics controller central processing unit automatically superimposes certain machine
parameters over the edges of the image.

2-1

PREINSTALLATION

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2-2-3 Imaging Functions (continued)

RT 6000/RT 6800 PICTORIAL VIEW

ILLUSTRATION 2-1

2-2

PREINSTALLATION

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

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2-3 ELECTRICAL SPECIFICATIONS

Electrical conduit, junction boxes, outlets, circuit breakers, and switches should be in place before installing the RT
6000/RT 6800 Console.

2-3-1 Power Supply

The RT 6000/RT 6800 operates on 115 or 220 VAC, single phase, 48 to 63 Hz power. Maximum current consumption
is 14 amps at 115 VAC, and 7 amps at 220 VAC. The 115 VAC main circuit breaker is rated at 15A; the 220 VAC
version at 10A. Voltage setup is performed in the factory, because different rear panels containing different power
cables and circuit breakers are used for the 115 VAC and 220 VAC versions.

2-3-2 Leakage Current

Totalground leakage from any exposed conductive surface to ground is less than 100 microamps (For UL 544). Total
ground leakage is less than 500 microamps (For 220V). Patient leakage current is less than 10 microamps. (These
parameters are checked during installation). The RT 6000/RT 6800 is classified as Class I, type BF equipment in
accordance with lECĊ601Ċ1.

2-3-3 Power Line Requirements

The following power line parameters should be monitored for one week before installation. We recommend that you
use a Dranetz Model 605Ċ3 Power Line Monitor with option 101:

PARAMETER : LIMITS

Voltage Range : U.S. : 103-127 VAC

: Europe : 206-254 VAC
: Far East : 90-110 VAC

Line Frequency : All applications : 50/60Hz (+/- 2Hz)

Power Transients : Less than 25 % of nominal peak voltage for less than 1 millisecond for any

type of transient, including line frequency, synchronous, asynchronous,
or aperiodic transients.

Decaying Oscillation : Less than 15 % of peak voltage for less than 1 millisecond.

2-3-4 Transient Protection

If testing indicates excessive transients occur, we recommend you use a transient suppressor, such as the Isolatrol
Model LAIĊ115 made by Control Concept Corporation.

2-3

PREINSTALLATION

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2-3-5 FacilIty Power Receptacle

A separate poweroutletwith a 15 amp circuit breaker for 115 VAC units, or a 10 amp circuit breaker for 220 VAC units,
is recommended. The specific power receptacle used depends on your country's power line standards.

For U.S. applications, use an Underwriters Laboratory (UL) approved receptacle, such as the Hubbell 8300
threeĊwire grounded type. For Canadian applications, the receptacle should be approved by the Canadian
Standards Association (CSA). For other countries, the receptacle should have International Electrotechnical
Commission (lEC) approval.

2-4 PHYSICAL SPECIFICATIONS

The RT 6000/RT 6800 (excluding accessories) weighs 441 Ibs (200 kg). Refer to Illustration 2Ċ2 for dimensions.

2-4-1 OperatIng Conditions

The RT 6000/RT 6800 is designed to operate within a temperature range of 50 degrees F to 104 degrees F (10
degrees C to 40 degrees C), and a relative humidity range of 10% to 85%. (Non-condensing).

Patient Comfort

Despite permissible operating temperature and humidity tolerances, we recommend that ambient room
temperature be maintained between 68 and 79 degrees F (20 to 26 degrees C), Humidity should be maintained
between 50% and 70% for patient comfort during ultrasound scanning.

Electromagnetic Interference (EMI)

In general, the maximum EMl noise Field Strength Intensity should be no more than 100 dB uV/m within the 10 kHz to
100 MHz frequency range, as measured three meters from the RT 6000/RT 6800. If there is reason for concern, we
recommend that you measure EMI using a spectrum analyzer.

1. EMI sources should be located and their effects minimized. These noise sources include microwave ovens,
certain types of electronic surgical equipment, and digital equipment such as desk top computers and
terminals, gel warmers, and AM radio broadcast sources.

2. Keep the RT 6000/RT 6800 at least 15 feet (approximately five meters) away from the above noise sources;
preferably in another room since wood or plaster walls, doors, floors, and ceilings provide some EMl shielding.
Special EMI shielding may be required to eliminate noise problems caused by high frequency, high powered
radio or video broadcast signals.

2-4

PREINSTALLATION

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2-4-1 Operating Conditions (continued)

RT 6000/RT 6800 DIMENSIONS

ILLUSTRATION 2-2

2-5

PREINSTALLATION

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2-4-2 Shipping and Storage Requirements

The RT 6000/RT 6800 excluding PROBES is shipped in a single container. Shipping weight is approximately 463 lbs
(250 kg). The size of the container is 43 in. x 30.5 in. x 55.5 in. (109 cm x 77 cm x 141 cm). The container can pass
through a standard door having a 30 in. x 60 in. (76 cm x 152 cm) opening. Table 2Ċ1 provides a summary of
temperature, altitude, and humidity tolerances for shipping, installation, and operation:

TABLE 2-1

SHIPPING REQUIREMENTS

2-5 RECOMMENDED ULTRASOUND ROOM LAYOUT

Table 2Ċ2 provides the requirements for an ultrasound room:

TABLE 2-2

ULTRASOUND ROOM REQUIREMENTS

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2-5-1 Optional Desirable Ultrasound Room Facilities

These facilities are:

1. Lab sink with hot and cold water;

2. Emergency oxygen supply;

3. Dimmer control for overhead lights;

4. Film viewer;

5. Film and linen storage;

6. Medical equipment storage;

7. Hospital grade equipment electrical outlet;

8. Power outlets for auxiliary equipment;

9. Document storage area for operating and service manuals;

10. Nearby waiting room, dressing room, lavatory;

11. Trash bin.

2-5-2 Floor Loading

The floor must be capable of supporting the RT 6000/RT 6800 Console, which weighs 441 Ibs to 586 lbs, depending
on options added. The floor load is calculated from the floor space taken up by the RT6000/RT6800, which is
approximately 0.418 m

2

. The floor load is approximately 480 kg/m2~640 kg/m2.

2-5-3 Recommended and Alternate Ultrasound Console Floor Plans

Illustration 2-3 provides a recommended standard floor plan for ultrasound equipment, while Illustration 2-4
provides an alternate, space saving floor plan for corner placement of ultrasound equipment.

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2-5-3 Recommended and Alternate Ultrasound Console Floor Plans (contInued)

RECOMMENDED ULTRASOUND FLOOR PLAN

ILLUSTRATION 2-3

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2-5-3 Recommended and Alternate Ultrasound Console Floor Plans (continued)

ALTERNATE, SPACE SAVING ULTRASOUND FLOOR PLAN

ILLUSTRATION 2Ċ4

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3-1 INTRODUCTION

This chapter contains many of the procedures required to install the RT 6000/RT 6800 Console. The Functional
Checks chapter contains the remaining installation procedures. All these procedures are included in T able 3Ċ1, the
RT 6000/RT 6800 Installation Checklist. Use this checklist to check off each installation step. This ensures a
thorough installation and functional checkout of the unit.

3-2 AVERAGE INSTALLATION TIME

The RT 6000/RT 6800 has been designed to be installed and checked out by an experienced service technician in
approximately four hours. RT 6000/RT 6800 Consoles with optional equipment may take slightly longer.

3-3 WARNINGS

1. Since the RT 6000/RT 6800 weighs approximately 507 Ibs (230 kg) without options, preferably two people
should unpack it. Two people are also preferable for installing bulky items, such as the optional strip chart
recorder .

2. The operator manual should be fully read and understood before operating the RT 6000/RT 6800 and kept
nearby for quick reference.

3. Although the ultrasound energy transmitted from the RT 6000/RT 6800 transducer is within AlUM/NEMA
standards, unnecessary exposure should be avoided. Only trained personnel should operate the RT 6000/RT

6800.

4. To prevent electrical shock, the RT 6000/RT 6800 should be connected to a properly grounded power
receptacle. Do not use a three prong to two prong adaptor. This defeats safety grounding.

5. The RT 6000/RT 6800 has no operator serviceable components. To prevent shock, do not remove any covers
or panels. Should problems or malfunctions occur, unplug the power cord. Only qualified service personnel
should carry out servicing and troubleshooting.

TABLE 3-1

RT 6000/RT 6800 INSTALLATION CHECKLIST

(Continued)

3-1

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3-3 WARNINGS (continued)

TABLE 3-1 (Continued)

RT 6000/RT 6800 INSTALLATION CHECKLIST

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3-3 WARNINGS (continued)

TABLE 3-1 (Continued)

RT 6000/RT 6800 INSTALLATION CHECKLIST

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3-3 WARNINGS (continued)

TABLE 3-1 (Continued)

RT 6000/RT 6800 INSTALLATION CHECKLIST

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3-4 EQUIPMENT INSPECTION/DAMAGE REPORTING

3-4-1 U.S. Operations

All packages and crates should be carefully examined for damage, shortages, etc. upon delivery. Table 3Ċ2
describes reporting procedures for various types of shipping problems:

TABLE 3-2

DOMESTIC SHIPPING DAMAGE REPORTING

IF UNIT PLEASE TAKE THE FOLLOWING ACTION:

IS VISIBLY DAMAGED A. NOTE THAT PRODUCT WAS DAMAGED ON BOTH COPIES OF THE DELIVERY

RECEIPT.

B. HAVE DRIVER SIGN DAMAGE NOTATION, USING HIS FULL SIGNATURE.

REQUEST INSPECTION BY CARRIER, WHICH MAY BE WAIVED

C. AFTER RECEIVING RETURN GOODS AUTHORIZATION, RETURN ALL DAMAGED

MERCHANDISE, FREIGHT CHARGES COLLECT, TO G.E. MEDICAL SYSTEMS,
DIGITAL BOARD REPAIR, 430 W. GRANGEAVE., MILWAUKEE, WI 53201
VIAORIGINAL CARRIER. INCLUDE RETURNED GOODS AUTHORIZATION
NUMBER.

HAS CONCEALED A. NOTIFY CARRIER IMMEDIATELY. REQUEST INSPECTION WITHIN 15 DAY LIMIT
DAMAGE IMPOSED BY CARRIER REGULATIONS.

B. RETAIN ALL PACKING MATERIAL UNTIL AFTER INSPECTION AND YOU HAVE THE

INSPECTION REPORT. THIS IS REQUIRED BY TARIFF REGULATIONS TO
VALIDATE A CLAIM.

C. NOTIFY THE G.E. DISTRICT SALES OFFICE INITIATING SHIPMENT. THEY WILL

OBTAIN A RETURN GOODS AUTHORIZATION.

D. RETURN ALL DAMAGED MERCHANDISE, FREIGHT CHARGES COLLECT, TO G.E.

MEDICAL SYSTEMS, DIGITAL BOARD REPAIR, 430 GRANGE AVE., MILWAUKEE,
WI 53201.

FAILS TO ARRIVE, CALL G.E. DISTRICT SALES OFFICE INITIATING ORDER.
WRONG PRODUCT, FOLLOW THEIR INSTRUCTIONS.
OR QUANTITY IS WRONG

HAS UNITED PARCEL DO NOT ACCEPT THE SHIPMENT. HAVE UPS RETURN IT TO
SERVICE (UPS) SENDER.
VISIBLE DAMAGE

HAS UPS CONCEALED CONTACT G.E. DISTRICT SALES OFFICE ORIGINATING
DAMAGE OR LOSS SHIPMENT; FOLLOW THEIR INSTRUCTIONS. THEY WILL OBTAIN A RETURNED

GOODS AUTHORIZATION AND ARRANGE TO HAVE UPS RETURN THE
MERCHANDISE UNDER A G.E. SHIPPING NUMBER. (THIS NUMBER APPEARS ON
THE METER STRIP ATTACHED TO THE CRATE OR PACKAGE).

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3-4-2 International Operations

Upon receipt of a shipment, inspect each package WITHOUT unpacking it. Note any damage or loss directly on the
shipment Bill of Lading or on the carrier's delivery receipt. IMMEDIATELY write a letter to the carrier to demonstrate
your intent to file a claim of loss or damage. Then contact your insurance agency. If the shipment is insured by a
General Electric Company policy, submit your claim to:

March and McLennon, Inc.

Air (or Marine, if applicable) Cargo Department

1221 Avenue of the Americas

New York, New York 10020

U.S.A.

3-4-3 Claim Procedure

The consignee/customer bears the responsibility for filing a timely claim for damages. Typically, a claim must be filed
with the insurance company and carrier within seven days of delivery. Questions regarding the application of this
procedure to your particular shipment may be referred to the Manager, Export Control, Milwaukee, Wisconsin,
Phone (414) 544Ċ3574.

3-5 UNPACKING RT 6000/RT 6800 COMPONENTS

Note:

Check the shipping container for special instructions. Verify that the container is intact. In some cases a
secondary container may be used. If so, ask the carrier for unpacking instructions.

3-5-1 Normal Unpacking Procedure

1. Leaving bottoms of containers intact, cut the band straps.

2. Pull box up and off of the RT 6000/RT 6800 Console.

3. Remove protective packing material; save for future shipments, if required.

4. Pull out ramp and place next to box. Preferably with a helper, carefully roll the RT 6000/RT 6800 off its shipping
platform.

CAUTION

Be prepared for a surge as the RT 6000/RT 6800 rumbles off its shipping platform.

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3-6 ASSEMBLING THE RT 6000/RT 6800

1. Remove the monitor from its shipping container.

2. Loosen the monitor mounting pin attached to the base slider on the console, and remove the base slider cover
by removing its rear screw.

3. Place the monitor on the base slider, and connect the monitor molex plug to matching molex receptacle. Then
push the plug into the monitor cover.

4. Install the base slider cover by using the rear screw removed on Step 2. Tighten the monitor mounting pin
securely.

5. Locate, remove, and unpack the transducers located in the separate container.

6. Gain access to the transducer receptacles located at the rear of the shelf just under the keyboard as follows:

a. Press the large white release button on the Iefthand side (as seen from front) of the RT 6000/RT 6800.
b. Then, carefully pull the entire keyboard towards the front as far as it will go.
c. Slide keyboard to the left until the two transducer receptacles are accessible.

7. Connect the BĊMode transducer to the Iefthand transducer receptacle as follows:

a. Ensure transducer twist lock lever points towards the 2 o'clock position.
b. Install transducer connector on the receptacle guide pin until it touches the receptacle mating surface.
c. Twist the transducer twist lock lever to the 6 o'clock position to lock it in place. Twist the lever to the 2

o'clock position to disconnect the transducer.

Note:

It is not necessary to turn off RT 6000/RT 6800 power to connect or disconnect a transducer.

8. Connect the RT6000/RT6800 power cable to a hospital grade power receptacle of the proper voltage. Never
use a three-to-two prong adapter; this defeats the safety ground.

3-7 MOVING THE RT 6000/RT 6800

3-7-1 Moving the RT 6000/RT 6800 to Another Room

In general, a single adult can move the RT 6000/RT 6800 along an even surface with no steep grades. At least two
people should move the machine when large humps, grooves, or grades will be encountered. (It is better to pull from
the rear rather than push from the front of the unit). Before moving, store all loose parts in the unit. Wrap transducers
in soft cloth or foam to prevent damage.

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3-7-2 Transporting the RT 6000/RT 6800

All shipping should be done by General Electric representatives, or their assignees. Follow the instructions in
paragraph 3-7-1, with the following additional precautions:

1. The original packaging should be used when reshipping the unit. General Electric representatives or
assignees shall repackage the console before shipment.

2. Carefully load the RT 6000/RT 6800 aboard the van. Use four straps to secure the unit and prevent lateral
movement. Set the unit over the van's center of gravity.

3. Prevent shock by driving at 45Ċ55 mph on paved roads. Avoid unpaved roads and drive carefully at road and
railroad crossings.

4. Repeat the installation procedure, completing the installation checklist, at the new site.

3-8 ELECTRICAL SAFETY TESTS

The following tests are performed at the factory and should be performed on site at the hospital. These tests are:
facility power wiring test, system leakage current test, and the ground continuity test. All measurements are made
with a Microguard Model MGĊ5 Microammeter built by BioĊDesign, Inc.

Do not lay the unit down for shipment!

3-8-1 Leakage Current

Leakage current is the current which could flow through a patient or operator if there is a system fault. Transducers
and exposed console surfaces are tested.

3-8-2 Ground Continuity

Ground continuity should be checked between the AC power supply and different points on the RT 6000/RT 6800
Console. A continuous ground ensures electrical safety if there are wiring faults.

3-8-3 Facility Power Wiring Test

1. Check the batteries in the Microguard tester by moving its selector switch to BattĊ", then to Batt+". The
meter needle should move over the box labeled Batt" for both switch positions if the batteries are good.

2. Set the tester power switch to the OFF position; move the selector switch to Outlet Test".

3. Connect the Microguard power cord into the three wire, hospital grade AC power receptacle to be used by
the RT 6000/RT 6800. The meter indicates wiring conditions in the five colored arcs at the bottom of the scale.
Correct any indicated wiring problems before installing the RT 6000/RT 6800.

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3-8-4 Transducer Source Leakage Current

1. Turn off the Microguard tester and the RT 6000/RT 6800.

2. Plugthe RT 6000/RT 6800 power plug into the Microguard tester; connect the tester to the AC power receptacle
tested in secton 3Ċ8Ċ3(3).

3. Set the tester's Selector switch to 200. This position provides a full scale meter reading of 200 microamps.

4. Set the tester's Patient Lead Selector" switch to the All Other Tests" position.

5. Set the tester's Input" switch to the Red Probe Only" position.

6. Apply GEL to transducer lens.

7. Wrap the transducertightly in aluminum foil. Ensure foil makes good contact with the transducer's acoustic
aperture.

8. Turn on RT 6000/RT 6800 power.

9. Suspend the transducer by the cable or place it on an insulating surface.

10. After waiting for scanning to begin, press the red probe of the Microguard tester against the aluminum foil on
the transducer; record the ammeter reading.

11. Record ammeter reading made under the test conditions specified in Table 3Ċ3. This test passes when all
readings measure less than 10 microamps.

CAUTION

Do not touch the console when the Microguard Tester Ground Switch" is open.

TABLE 3-3

TRANSDUCER SOURCE LEAKAGE CURRENT TEST

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3-8-4 Transducer Source Leakage Current (continued)

11. Repeat this test for all transducers that will be used. These readings must be maintained as part of the installation
record.

3-8-5 Chassis Source Leakage Current Test

1. Leave the Microguard tester and console connected as described above. Locate the following test points:

a. Monitor Housing Screw
b. Rear Panel Connector
c. Any Castor

2. Make current readings at these test points using the red probe of the Microguard tester. Record readings for

the test conditions specified in Table 3Ċ4. This test passes when all readings measure less than 100
microamps. Retain these readings as part of the installation record.

TABLE 3-4

CHASSIS SOURCE LEAKAGE CURRENT TEST

3. Disconnect the Microguard Tester from the AC outlet. Disconnect the RT 6000/RT 6800 power plug from the

Microguard Tester.

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3-8-6 Ground Continuity Test

1. Set Microguard Tester Input switch to Red and Black Probes" position.

2. Set tester's Patient Lead switch to All Other Tests" position.

3. Plug the black tester probe into the jacket next to the red probe lead.

4. Short the red and black probes together to calibrate zero ohms. (Use Zero Ohms" adjustment beneath the

selector switch).

5. Measure the resistance from the ground (round) prong of the power plug to the following test points; record

below. This test passes when all readings measure less than 100 milliohms. This completes the electrical safety
tests.

READING

1. TEST POINT 1 : MONITOR HOUSING _______

2. TEST POINT 2 : REAR PANEL CONNECTOR _______

3. TEST POINT 3 : ANY CASTOR WHEEL SUPPORT _______

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4-1 INTRODUCTION

This chapter provides procedures for quickly checking major functions of the RT 6000/RT 6800 Console. It is one of
the three service chapters in this manual. The other service chapters are: Chapter 6, Service Adjustments, and
Chapter 8, Diagnostics.

Note:

These procedures form part of the Installation Checklist found at the beginning of
Chapter 3 and should be performed during installation.

However, you should also use these proceduresas basic checks when service is required. In this case, use this
chapter's Table of Contents to locate and exercise the function related to the service complaint. Should the
functional test fail, refer to Chapter 8, Diagnostics.

4-1-1 Required Equipment

To perform these tests, you'll need the following items:

a. Any sector transducer and a CW Transducer for optional Doppler equipped consoles.
b. Phantom (We recommend the Model 413 Phantom manufactured by RMI, which was used in this

procedure. However, any echo block or phantom with defined reference points will be adequate).

c. Water bottle. (Water is used as the coupling medium on the phantom surface).

Turn off all optional equipment such as a strip chart recorder or video tape recorder
before proceeding.

4-2 FUNCTIONAL CHECK PROCEDURES

4-2-1 Power Up Check

OperatorAction Verifiable RT 6000/RT 6800 Action

a. Connect the transducer to lefthand probe

connector beneath keyboard. (To reach connector,
press white button on lefthand side of console;
slide keyboard toward front of unit. Then rotate keyboard
to left).

Note:

b. Lift up RT 6000/RT 6800 top panel cover located above

the Function, Doppler, Display, and Image controls.

c. Turn on Power toggle switch (located

on left side of console). One or more beeps occur. BĊmode display shown

in Illustration 4Ċ2 appears.Display parameters in
upper righthandcorner of CRT reads: DF:16 G:50
DR:54 REJ: AVG:.

4-1

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4-2-2 Acoustic Power (%) Potentiometer

Operator Action Verifiable RT 6000/RT 6800 Action

a. Type <CONTROL> OA 1 to check acoustic power

function. (if already on, press <CONTROL> ; if
off, press <ENTER>).

b. In top panel, rotate Acoustic Power (%) As pot is rotated, AP:00, AP:6,

Pot from (off) position to 6,25,56 AP:25, AP:56, then
and 100% positions. AP:100 appear on monitor.

4-2-3 Sector Angle Switch

Operator Action Verifiable RT 6000/RT 6800 Action

a. Switch Sector Angle switch between Sector Image narrows when sector

60 % and 90 % positions. switch is in 60% position; widens when

switch is in 90 % position.

SUB PANEL

ILLUSTRATION 4-1

SECTOR PATTERN

ILLUSTRATION 4-2

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4-2-4 Frame Averaging

Operator Action Verifiable RT 6000/RT 6800 Action

a. Scan phantom with transducer. Select

BĊmode operation.
b. Set gain to 80 dB; dynamic range to 54dB.
c. Switch Frame Averaging pot from Image becomes smoother as frame

Off to H (High) positions. averaging increases.

d. Press Auto key to return to Gain and

dynamic range default settings.

4-2-5 Illumination Control

Operator Action Verifiable RT 6000/RT 6800 Action

a. On top control panel, turn Front panel and TGC control lamps in

Illumination switch off and on. slider pots turn off and on.

4-2-6 ECG Off/On Control (Units W/ECG Option Only)

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press B/M key to select MĊmode. Then press

Prgm key to display full size MĊmode display.

b. Remove the rear panel and fan assy to access

connector CN136 on the rear edge of the PSSA2 Assy.

c. Connect the special test cable (YMS P/N P9500RS)

to theECG, PCG, AUX1 and AUX2 jacksbelow thekeyboard.
d. Connect other end of test cable to CN1 36, PSSA2 Assy.
e. Type <CONTROL> S <SHIFT> ! <ENTER> to enter

service mode.
f. Type <CONTROL> SGB <ENTER>.
g. Turn ECG switch ON. Verify simulated QRST Trace is similar to

that shown in Illustration 4Ċ3.

4-3

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4-2-7 ECG Units: ECG Gain

ECG PATTERN-1

ILLUSTRATION 4-3

Operator Action Verifiable RT 6000/RT 6800 Action

a. Vary ECG Gain from x0.5 to x5, using Verify QRST trace amplitude increases

ECG Gain pot. as shown by comparing Illustration 4Ċ3

and 4Ċ4.
b. Decrease ECG Gain to x2.
c. Turn RT 6000/RT 6800 off and on.

4-2-8 ECG Units: Sync 1/Sync 2 Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press Sync 1 key on keyboard. Sync 1 :xx appears.
b. Rotate trackball to

display. This aligns ECG marker with the R portion
of cardiac waveform.

c. Rotate trackball to

reached. indicating 1 second has elapsed

d. Rotate trackball to

appears on display. Now, marker is located 1999

msec after the R portion of cardiac waveform.
e. Rotate trackball to left until Sync 1:0 appears.
f. Press Sync 2 on keyboard. Rotate trackball to

left

until Sync 1:0 appears on

right

until R peak is Verify Sync 1 reads Sync 1:1000,

between R peaks. (See Illustration 4-5).

right

until Sync 1:1999

right.

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4-2-8 ECG Units: Sync 1/Sync 2 Controls (continued)

ECG PATTERN-2

ILLUSTRATION 4-4

SYNC 1

ILLUSTRATION 4-5

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4-2-8 ECG Units: Sync 1/Sync 2 Controls (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

1. Verify dotted marker appears as shown in
Illustration 4Ċ6.

2. Verify Sync 2:xx (time in msec) appears after Sync
1:0.

SYNC 1 AND SYNC 2

ILLUSTRATION 4-6

4-2-9 ECG Units: ECG Video/SCR Position Potentiometers

Operator Action Verifiable RT 6000/RT 6800 Action

a. While watching monitor, rotate ECG ECG trace moves up and down on

Position pot in both directions. screen.

SCR (LSR) Equipped Units Only:

b. On SCR, set SPEED pot to EXT position.
c. Press Strip key on keyboard. Rotate Verify ECG trace moves from side to side

SCR's ECG Position pot while on strip chart.
monitoring the SCR strip chart.

4-6

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4-2-9 ECG Units: ECG Video/SCR Position Potentiometers (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

d. Press Strip key again to stop strip charting.
e. Press <CONTROL> key twice to exit program.

4-2-10 PCG Units: PCG Off/On Switch: PCG Gain Pot

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press B/M key to select MĊmode.
b. Press Prgm key. Full size MĊmode display appears.
c. If not done, remove the rear panel and fan assy

to access connector CN136 on the rear edge of
the PSSA2 Assy in card cage.

d. lf not done, connect the special test cable

(YMS P/N P9500R5) to the ECG, PCG, AUX1 and AUX2
jacks below the keyboard.

e. If not done, connect other end of test cable to CN136,

PSSA2 Assy.

f. If necessary, type <CONTROL> S <SHIFT>

<ENTER> to enter service mode.
g. Type <CONTROL> SGC <ENTER>.
h. Turn PCG switch ON. Verify PCG simulated signal is similar to

that shown in Illustration 4Ċ7. Note that
adjacent waveforms have opposite
phases.

i. Using stop watch, verify each similar phase

waveform occurs once per second. Approximately

0.4 seconds should elapse between peaks of

opposing phase waveforms.

4-7

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4-2-10 PCG Units: PCG Off/On Switch: PCG Gain Pot (continued)

PCG TEST SIGNAL

ILLUSTRATION 4-7

4-2-11 PCG Units: PCG Gain/Filter checks

Operator Action Verifiable RT 6000/RT 6800 Action

a. Rotate PCG Gain pot to ensure gain circuit

works.
b. Rotate FILTER pot from L to H. Waveform compresses as low frequency

cutoff is increased.

c. Plug in headphones below keyboard. Verify PCG frequency increases.

Switch Frequency Double switch ON.
d. Rotate PCG Position pot. Verify PCG trace moves up and down on

the monitor.

SCR (LSR) Equipped Units Only:

e. Press Strip key on keyboard. Rotate Verify PCG trace moves from side to

SCR's PCG Position pot while monitoring side on strip chart.

the SCR strip chart.
f. Press Strip key again to stop strip charting.
g. Press <CONTROL> key twice to exit program.

4-8

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4-2-12 Auxiliary Option Units Only: AUX1 Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press B/M key to select M mode. Then press Prgm

key to display full size M mode display.
b. Set depth for 12cm.
c. If not done, remove the rear panel and fan assy

to access connector CN 136 on the rear edge of the

PSSA2 Assy.
d. If not done, connect the special test cable

(YMS P/N P9500RS) to the ECG, PCG, AUX1 and AUX2

jacks below the keyboard.
e. If not done, connect other end of test cable to CN136,

PSSA2 Assy.
f. If not done, type <CONTROL>S<SHlFT>!<ENTER>

to enter service mode.
g. Type SGD <ENTER> for AUX1 display; SGE <ENTER>

for AUX2 display.
h. Switch AUX1 switch ON. Verify sinewave appears as shown in

Illustration 4Ċ8.
i. Rotate Monitor's AUX1 Position pot. Verify AUX1 trace moves up and down on monitor.
j. Press Strip key on keyboard. Rotate Verify AUX1 or AUX 2 trace moves from

SCR's AUX1 Position pot while monitoring side to side on strip chart.

the SCR strip chart.
k. Press Strip key again to stop strip charting.
l. Press <CONTROL> twice to Exit.

4-9

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4-2-13 Auxiliary Option Units Only: AUX2 Controls

Operator Action Verifiable RT 6000/RT 6800 Action

Repeat paragraph 4Ċ2Ċ12, steps a through k.

AUX1/AUX 2 TEST PATTERN

ILLUSTRATION 4-8

4-2-14 Gen Meas and Gen Caic Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press Gen Meas key in Function block. Gen Meas key LED lights;

General Measurements display appears:
GENERIC MEAS: SET PATIENT
IDENTIFICATION
ID
AGE : yrs
HEIGHT : cm
WEIGHT : kg

SEX
b. Press ENTER KEY ENTER is highlighted.
c. Rotate trackball left to right. Highlight moves in submenu at bottom of

General Measurements display.
d. Press blue New Patient key, left side, General Measurements display

lower panel. disappears.

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4-2-15 L, R, Proc Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press dual channel BĊmode key. Dual Ċmode sector displays appear.
b. Press L key in Patterns block, middle L key LED lights; in default mode,

panel. a cardiac pattern menu is displayed on left side

of screen.

Cardiac Menu:

Ptrn:PLAX PSX-MV PSX-PP PSX-AV
AP-4CH AP-2CH SSN SCĊ4CH

c. Rotate trackball left to right. Patterns occur one at a time as each

pattern is highlighted. (See Illustration

4-9a/b for cardiac patterns).
d. Press New Patient key. Last pattern and the submenu are erased.
e. Press dual channel BĊmode key two times.
f. Press R key in Patterns block, middle panel. R key LED lights; cardiac patterns

display appears.
g. Rotate trackball left to right. Seven displays occur one at a time under

righthand sector as each pattern is

highlighted. (See Illustration 4-10 for

typical display)
h. Press New Patient key. Cardiac display disappears; single BĊmode image

returns.
i. Press Proc key in Patterns block, middle panel. Proc key LED lights; AĊF submenu appears at

bottom of screen. (See Illustration 4-11).
j. Rotate trackball left to right. Image darkens as highlighter moves from A to

D in submenu; image brightens as highlighter

moves from DĊF.
k. Press New Patient key. Default BĊmode image reappears.

4-11

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-15 L, R, Proc Controls (continued)

CARDIAC PATTERNS-1

ILLUSTRATION 4-9a

4-12

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-15 L, R, Proc Controls (continued)

CARDIAC PATTERNS-2

ILLUSTRATION 4-9b

4-13

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-15 L, R, Proc Controls (continued)

CARDIAC PATTERN-3

ILLUSTRATION 4-10

PROC CONTROL

ILLUSTRATION 4-11

4-14

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-16 Mic Control (Perform if headphones available)

Operator Action Verifiable RT 6000/RT 6800 Action

a. Plug headphones into Headphone jack in recess

behind keyboard. Put them on.

b. Press On/Off key, middle panel, so its LED lights .Speak into Mic hole. You should hear your

voice through

headphones.
c. Press On/Off key again to turn off microphone.

4-2-17 Display Block

Focus, Depth, Invt, and Rvs Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Turn power off, then on; set image gain BĊmode image appears.

for GAIN: 90 display.

b. Press transducer on Phantom. Repeatedly Focus Mark on righthand side of

press Focus key CRT moves up to 1 cm mark. Focus area at 1 cm

is brighter.
c. Press transducer on Phantom.
d. Repeatedly press Focus key. Focus Mark moves down to 8 cm mark. Focus area

at 8cm is brighter.
e. Press Auto pushbutton.
f. Press Invt key in Display block once. Invt key LED lights; BĊmode image turns upside

down.
g. Press Invt key again. Invt key LED turns off; BĊmode image returns to

upright position.
h. While scanning phantom, press Rvs Rvs key LED lights; image reverses.

key in Display block.

i. Press Rvs key again. Rvs key LED turns off; image returns to

normal.

4-2-18 Image Block

Gain, Dynamic Range, and Rejection

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press the B/MĊmode key in the B/MĊmode display appears.

Mode block, lower panel.

b. b. Press the BĊmode key in the BĊmode key LED lights. Sector scan

Image block, middIe panel. appears.

4-15

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-18 Image Block (continued)

Gain, Dynamic Range, and Rejection

Operator Action Verifiable RT 6000/RT 6800 Action

c. Turn Gain potentiometer clockwise. BĊmode image brightens; G: gain indicator

increases to 100 maximum.(100dB). Beeper sounds

when G:100 exceeded.

d. Turn Gain potentiometer counter clockwise. BĊmode image darkens to black; G: gain indicator

decreases to 0 minimum. Beeper sounds when G:0

exceeded.
e. Press the B/MĊmode key in the image block. M key LED lights.
f. Turn Gain potentiometer clockwise. MĊmode image brightens; G: gain

indicator increases to 100 maximum.(100dB).

Beeper sounds when G:100 exceeded.
g. Turn Gain potentiometer counter clockwise. MĊmode image darkens to black; G: gain indicator

decreases to 0 minimum. Beeper sounds if G:0

exceeded in negative direction.
h. Press Auto pushbutton. BĊmode image, default settings are restored.
i. Press the Dynamic Range▲key continuously. Whole image becomes softer and

brighter. DR: dynamic range indicator

increases to DR:72 (72 dB) maximum.
j. Press the Dynamic Range key continuously. Whole image becomes sharper and darker.

DR: dynamic range indicator decreases to DR :30,

(30 dB) minimum.
k. Press the Auto pushbutton. BĊmode image, default settings are restored.
l. Press the Rejection▲key in Image block, Image rejection increases (screen

middle panel. darkens). REJ: rejection indicator increases to REJ:

H (High) maximum.
m. Press the Rejection▼key. Image rejection decreases (screen brightens).

REJ:rejection indicator decreases to REJ: L (Low)

minimum.

4-2-19 Time Gain Compensation (TGC) Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press the BĊmode

key.

b. Slide any TGC control to the right. Image in corresponding focal zone band on display

brightens.

4-16

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-19 Time Gain Compensation (TGC) Controls (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

c. Slide same TGC control to the left. Image in corresponding focal zone band on display

darkens.
d. Repeat steps b and c, sliding each TGC Corresponding focal zone band should

control right and left. brighten and darken.

e. Press Depth▲and▼keys to change focus depth

from 4 cm minimum to 24 cm maximum. At each
depth setting, move TGC controls to ensure they
brighten or darken the selected depth area.

4-2-20 Auto Control

Operator Action Verifiable RT 6000/RT 6800 Action

a. Switch POWER off, then on. Auto LED illuminates; default image

control settings are: G50, DR54, REJ:xx, AVG:xx,

DF:16.
b. Press either Dynamic Range key once. Auto LED turns off; unit is in manual mode.

4-2-21 Mode Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press BĊmode

b. Press Dual BĊmode key. Half sized BĊmode image is displayed on left side

c. Press the Dual BĊmode key again. Real time righthand BĊmode image

Scan phantom with probe. appears; lefthand image freezes. Righthand Dual

d. Press the B/MĊmode key. BĊmode appears at left; MĊmode at right side of

e. Move the trackball. BĊmode depth cursor line should sweep across

key. BĊmode key LED illuminates; BĊmode sector scan

is displayed.

of CRT; Lefthand Dual BĊmode key LED lights.

BĊmode key LED lights; lefthand LED turns off.

CRT. B/M key LED lights.

BĊmode display.

f. Press the B/M1/M2

g. Move the trackball. Coarse dotted line moves. This is the M1 MĊmode

key. BĊmode image appears on left; M1 and M2

MĊmodes appear on right side of CRT. M1 LED

lights.

sampling cursor.

4-17

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-22 Program Control

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press the B/MĊmode key. B/MĊmode display appears.

b. Press the BĊmode/Program key. BĊmode is replaced by enlarged MĊmode display.
c. Press the BĊmode/Program key again. B/MĊmode display reappears.

d. Press the B/PDĊmode key. B/PDĊmode display appears. (BĊmode on left,

Pulse Doppler mode on right).
e. Press the B/M/PDĊmode key. B/M/PDĊmode display appears. (BĊmode on left,

MĊmode in upper right, PDĊmode in ,Iower right).
f. Press the B/M1/M2Ċmode key. B/M1/M2Ċmode display appears. (BĊmode on left,

M1Ċmode in upper right, M2Ċmode in, Iower

right).

4-2-23 Sweep Speed, Pause, Update, Freeze Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press the B/MĊmode key. B/MĊmode display appears.
b. Turn Gain potentiometer clock-wise to

increase gain to 80 dB (G:80 on display).

c. Locate Sweep Speed key in Sweep Speed

block, lower panel.

d. Press Sweep Speed key three times slowly MĊmode sweep rate should change

to select Fast, Medium and Slow sweep accordingly. Corresponding Fast,
speeds Medium, or Slow LED lights.

e. If available, turn on the Strip Chart Recorder

(SCR). Then press the Fast, Medium, and Slow
Sweep Speed Keys.

f. Turn off SCR. Printing Paper speed of SCR should change

accordingly.

g. Press the B/MĊmode

on Phantom. MĊmode appears on right.

key. Move probe BĊmode appears on left.

h. Press Pause key. BĊmode only freezes.
i. Press Pause key again. BĊmode image moves.
j. Press BĊmode key. BĊmode display appears.
k. Press Freeze key while moving transducer BĊmode display freezes.

on Phantom.

l. Press Freeze key again. BĊmode display moves.

4-18

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-24 Circ/Area: Distance/Depth Controls.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press Circ/Area key. ClRC + cm and crosshairs appear.
b. Press Set key; draw circle using trackball. Readout of circle perimeter in cm is displayed.
c. Put + mark in the circle and press End key. This terminates measurement.
d. Press Off key. ClRC + cm and circle are erased.
e. Press Dist/Depth key in Measurement block, DlST + cm and crosshairs appear.

lower panel.

f. Press Set key; draw line using trackball. Straightdotted line and readoutof line length (depth)

in cm is displayed.
g. Press End key. This terminates measurement.
h. Press Off key. DlST + cm and dotted line are erased.

4-2-25 Doppler Units: Doppler Controls

Doppler Mode Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press the B/PDĊmode key in Mode block, BĊmode image appears on left;

lower panel. PDĊmode image on right. B/PDĊmode key LED

lights. A sampling cursor line with volume indicator

appears in BĊmode image.
b. Move the trackball up and down. Volume indicator moves along cursor line. SVD:

measurement beneath BĊmode image changes.
c. Move the trackball left to right. Cursor line sweeps across BĊmode display.

d. Press the B/M/DĊmode key in Mode block, BĊmode image appears on left; lower

panel.MĊmode image over DĊmode image at

right. A sampling cursor with volume indicator

appears in BĊmode image.
e. Move the trackball up and down. Volume indicator moves along cursor line.
f. Move the trackball left to right. Cursor line sweeps across BĊmode display. SVD:

measurement beneath BĊmode image changes.
g. Connect a Continuous Wave Doppler (CWD) transducer to

the round CW transducer connector.

h. Connect a second transducer to the righthand transducer

connector.

4-19

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-25 Doppler Units: Doppler Controls (continued)
Doppler Mode Controls

Operator Action Verifiable RT 6000/RT 6800 Action

i. Press 1/2 key in Probe block, right side of LED beside 2" lights; BĊmode from

lower panel. righthand probe appears.

j. Press the Single CWD key in Probe block, Single CWD LED lights; CW doppler

lower panel. display appears.

k. Press the Single CWD key again. Single CWD LED turns off; LED beside

2" on 1/2 key lights; BĊmode is

reselected.
l. Press 1/2 key to select probe 1. LED beside 1" lights; BĊmode from

Iefthand probe appears.

Doppler Units: Audio Volume Control

a. Ensure that the Display Intensity potentiometer is turned

halfway up.
b. Press B/PDĊmode key. B/PDĊmode display appears.
c. Turn Audio Volume potentiometer clockwise Sound increases when pot is turned

and counterclockwise. clockwise; decreases when pot turned

counterclockwise.

Doppler Units: Vel Scale, SVL, SVS, Phase, Baseline Keys

a. Press B/PDĊmode key. Ensure probe 1 BĊmode/Pulse Doppler mode display occurs.

is selected.(LED lighted beside 1" on 1/2 key).
b. Press VeI Scale key in Doppler block, Vel Scale key LED lights.

middle panel.
c. Turn the large unmarked potentiometer F and R overlays on PD display decrease next to the

Doppler controls counterclockwise. in value.

d. Turn the unmarked potentiometer clockwise. F and R overlays increase in value.
e. Press SVL (Sample Volume Length) key SVL key LED lights.

in Doppler block, middle panel.
f. Turn unmarked potentiometer SVL parameter decreases.

counterclockwise.
g. Turn unmarked potentiometer SVL parameter increases.

counterclockwise.
h. Press Baseline key in Doppler block, Baseline key LED lights. Baseline

middle panel. appears at bottom of PD image.
i. Turn unmarked potentiometer clockwise, Baseline rises in approx. 2 cm

one notch at a time. increments to top of mode display.

4-20

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4Ċ2Ċ25 Doppler Units: Doppler Controls (continued)
Doppler Units: Spec Invt: Spec Trace Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Move baseline up 1/3 screen with the Baseline key LED lights. Baseline appears at

unmarked potentiometer. bottom of DĊmode image.
b. Press Spec Invt key in Doppler block, Spec Invt key LED. lights; PD image

middle panel. inverts as evidenced by inverted baseline.
c. Press Spec Invt key again. Spec Invt key LED turns off; PD image and

baseline return to nonĊinverted positions.

Doppler Units: Doppler Mode Gain

a. Turn Gain potentiometer clockwise. PDĊmode image brightens; G: gain reading

increases.

b. Turn Gain potentiometer counterclockwise. PDĊmode image darkens to black; G: gain

reading decreases.

Doppler Units: Time, Vel Controls

a. Press Time key in Measurement block, Time key LED lights; TIM + MS" appears to left

lower panel. of BĊmode display.
b. Press Set key in Measurement block; 1. Timeline appears. Time is measured in msec

rotate trackball. from point where Set key was pressed.

2. Time changes in MS display as trackball

moves.
c. Press End and Off keys. Time measurement is erased.
d. Press Vel key in Measurement block; Vel key LED lights; VELO + appears to left of

lower panel. BĊmode display.

e. Press Set key in Measurement block; 1. Timeline appears. Time is measured in msec

rotate trackball. from point where Set key was pressed.

2. Time changes in VELO display as trackball

moves.
f. Press End and Off keys. Measurement is erased.
g. Press blue New Patient key, right side of BĊmode image reappears.

lower keyboard.

4-21

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-26 VTR (VCR) Equipped Units Only: Front panel VTR Controls

VCR Record Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Turn on VTR.
b. Press RESET key on VTR. Video tape counter resets to 0:00:00

(hrs:mins:secs).
c. Insert blank VHS Videocassette into VTR.
d. Press REC key on VTR: record 30 seconds

of the ultrasound image on the monitor. Scan
a phantom to obtain movement.

e. Press REW key on VTR. Rewind tape

until tape counter reads 0:00:00.

VCR Playback Controls

a. Press Play key on lower panel. After several seconds, VTR image is displayed on

monitor.
b. Press Pause key on lower RT 6000/RT 6800 Video image freezes.

panel.
c. Press Pause key again. Tape playing resumes.
d. Press Play key. Video image is replaced by current ultrasound

image.

Units w/VCRs Only: VCR Rewind, Fast Forward, Counter Reset Controls

a. While holding down unmarked blue key, Verify tape is rewinding.

type K.
b. Press unmarked blue key again. Verify tape stops.
c. While holding down unmarked blue key, Verify tape moves fast forward.

type K.
d. Press unmarked blue key again. Verify tape stops.
e. While holding down unmarked blue key, Verify tape counter resets to all zeroes.

type a period.

4-2-27 SCR (LSR) Equipped Units Only: SCR Controls

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press SCR PWR rocker switch to turn on

Strip Chart Recorder.
b. Press Page key on RT 6000/RT 6800 lower Page key LED lights; SCR outputs a few

panel. feet of paper with current screen image, then

stops.

4-22

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-27 SCR (LSR) EquippedUnits Only: SCR Controls (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

c. Press Strip key on RT 6000/RT 6800 lower Strip key LED lights; SCR continuously feeds

panel. paper with current screen image.
d. Press Strip key again. Strip Chart recording stops.
e. Turn off SCR.

Misc, Blue Key Tests

a. While holding down unmarked blue key, Analog curve appears.

type A.
b. While holding down unmarked blue key, Verify analog curve disappears.

type A again.
c. While holding down unmarked blue key, Verify whitescale overlay disappears, leaving

type D. sector display and grayscale.
d. While holding down unmarked blue key, Verify whitescale overlay reappears.

type D again.
e. While holding down unmarked blue key, type H. Verify Blue Key Help Menu appears.
f. Press

4-2-28 Date Change Test

a. Press

b. Press
c. Type in current date.
d. Press

e. Turn RT 6000/RT 6800 off and on. Date entered will still be displayed.

4-2-29 Time Change Check

ENTER

CONTROL, C

ENTER

ENTER

key. Verify BĊmode image reappears.

Operator Action Verifiable RT 6000/RT 6800 Action

andDkeys. Display = Change (D:Date F:Film T:Time

H:Hospital Name) [Ent] =

key. Display = Change Date = (MM/DD/YY)

key. The date will be displayed in the upper left corner

Operator Action Verifiable RT 6000/RT 6800 Action

D

of the screen.

a. Press

b. Press

CONTROL, C

ENTER

key. Display = Change Time (HH/MM) [Ent] =

andTkeys. Display = Change (D:Date F:Film T:Time

H:Hospital Name) [Ent] =

4-23

T

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4Ċ2Ċ29 Time Change Check (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

c. Enter hours (1Ċ24), a slash and minutes For example: 04/45"

(1Ċ59). You must enter two digits for the

hours and two digits for the minutes.
d. Press

e. Turn RT 6000/RT 6800 off and on. Time entered will still be displayed.

4-2-30 Hospital Name Check

a. Press

b. Press
c. Enter hospital or doctor's name (up to The name is displayed.

d. Press

e. Turn RT 6000/RT 6800 off and on. Hospital and doctor entered will still be displayed.

4-2-31 Polaroid Equipped Units Only: Film Development Beep Time Check

ENTER

CONTROL, C

ENTER

26 alphanumeric characters)

ENTER

key. Counting commences from the new time now dis-

Operator Action Verifiable RT 6000/RT 6800 Action

andHkeys. Display = Change (D:Date F:Film T:Time

key. Display = Change Hospital Name (26) [Ent] =

key. The name will be displayed in the upper left

Operator Action Verifiable RT 6000/RT 6800 Action

played in the upper left corner of the screen.

H :Hospital Name) [Ent] =

comer of the screen.

H

a. Press

b. Press

c. Type a 2; then type

d. Press the Camera key. Monitor the time Development period should equal 45 seconds.

CONTROL, C

ENTER

setting.

lapse between hearing the shutter trip and

hearing the beep.

andFkeys. Display = Change (D:Date F:Film T:Time

key. Display = Change Film Beep (0:off 1:30 2:45 3:60)

ENTER

key. The 45 second development period is entered

4-24

H:Hospital Name) [Ent] =

[Ent] =

into memory. This is the development time default

FUNCTIONAL CHECKS

F

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-32 System Parameter Test

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press

b. Press
c. Press any key to Exit. Screen returns to previous scan.

4-2-33 Transducer Parameter Display Test

a. Press

b. Press

c. Press

4-2-34 Abbreviation Display Test

a. Press

CONTROL, D

ENTER

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, D

ENTER

the image screen.

ENTER

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, D

andSkeys. Display = Display Parameter (S:System X:Xducer

A:Abbr [Ent] =

key. System parameters are displayed.

andXkeys. Display = Display Parameter (S:System X:Xducer

key. The transducer parameters will be displayed on

key to Exit. Screen returns to previous scan.

andAkeys. Display = Display Parameter (S:System X:Xducer

S

A:Abbr [Ent] =

A:Abbr [Ent] =

X

A

b. Press
c. Press any key to Exit. Screen returns to previous scan.

4-2-35 Echo Level Measurement (In Traced Area) Test

a. Press Freeze key. Image freezes.
b. Press

c. Press
d. Position the cursor using the trackball.
e. Press
f. Use the trackball to trace the circumference Circumference is traced on the screen.

ENTER

CONTROL, E

ENTER

SET

of any object. Ensure the beginning and

end of the outline meet (or slightly overlap).

key. The abbreviation list is displayed.

Operator Action Verifiable RT 6000/RT 6800 Action

and0(zero) keys. Display = Keys. Echo level (0:Free 1:3 2:6 3:12

key. The measurement cursor appears on the screen.

key. The cursor will turn into a dot.

H:Histo) [Ent] =

0

4-25

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4Ċ2Ċ35 Echo Level Measurement (In Traced Area) Test (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

g. Press
h. Use trackball to move cursor anywhere

i. Press

j. Press

4-2-36 Echo Level Measurement (Within 3 mm Box) Test

This control function allows you to measure the gray level within one of the three echo sample box sizes (3,6, or 12
mm).

a. Freeze the image.
b. Press

c. T ype in 1.
d. Press

e. Position the box cursor in any area.

SET

key .

inside the traced area.

END

key. The area is highlighted for The Area result is displayed at the left (cm2) and a

moment. the echo level is displayed inside the traced area.

OFF

key. Echo level data is erased.

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, E

ENTER

image screen.

key . Display = Echo level (0:Free 1:3 2:6 3:12 H:Histo)

[Ent] = _

key. The selected 3 mm box cursor will appear on the

f. Press

g. Press

4-2-37 Echo Level Histogram (For Traced Area) Test

This function allows you to measure the echo level within a traced area and display a histogram.

a. Freeze the image.
b. Press

c. Press
d. Use the trackball to move the cursor to the

e. Press

END

key. The box will be highlighted briefly. The echo level

will be displayed beside the box cursor.

OFF

key. Echo level overlays are erased.

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, E, H

ENTER

desired position.

SET

key. The measurement cursor appears.

key. Measurement cursor changes into a dot (out-

and0(zero) keys. Display = Echo Histogram (0:Free 1:32:63:12)

[Ent] =

line cursor)

0

4-26

FUNCTIONAL CHECKS

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4Ċ2Ċ37 Echo Level Hlstogram (For Traced Area) Test (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

f. Use the trackball to trace the circumference The outline is displayed on screen as you trace.

of an object. Ensure the beginning and end

of the outline meet or slightly overlap.
g. Press

h. Use the trackball to move the cursor anywhere

i. Press

j. Press

Mean : Average gray level.

Mode : The gray level occurring most frequently.

Percent of mode : A higher percent of mode means that the gray level is narrowly dispersed throughout the

4-2-38 Echo Level Nistogram (3 mm Box: Histogram) Test

This control function allows you to measure the gray level within a 3,6, or 12 mm box, using a histogram.

SET

key. Measurement cursor is displayed at the edge of

inside the traced area.

END

key. Area is displayed,Happears outside the trace,

OFF

key. Histogram display is erased.

Operator Action Verifiable RT 6000/RT 6800 Action

the outline.

and a histogram is displayed on the right of the
screen along with the mean, mode and percent
of mode.

histogram sample; a lower percent means the gray level has a wider dispersion.

a. Freeze the image.
b. Press

c. Type in a 1. Display=(0:Free 1:32:63:12) [Ent]=
d. Press
e. Position the box cursor on the area of interest.
f. Press

g. Press

h. Press Freeze key to unfreeze image.

CONTROL, E

ENTER

END

key. The box will be highlighted. The echo level value

will be displayed by the box cursor. A histogram

is displayed on the right of the screen along with

the mean, mode and percent of mode.

OFF

key to erace measurement. The following will be erased: Cursors, Traces/Out-

andHkeys. Display = Echo Histgram (0:Free 1:3 2:6 3:12)

key. A 3 mm box appears.

4-27

[Ent] =

lines, Results and Histogram.

FUNCTIONAL CHECKS

1

GE MEDICAL SYSTEMS RT6000/RT6800 SERVICE MANUAL

REV 1 P9030FB

4-2-39 Gray Background Level Test

This control function allows you to make the screen background lighter or darker. Note that there is only one
background adjustment for all of the image formats (2D, MĊmode and Doppler).

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press

b. Press

c. Type in 63.
d. Press

e. Press
f. Press0(zero),

4-2-40 2D Gray Background Level Control Test

This control function allows you to lighten or darken the 2D sector image display without affecting the background. A
0 setting results in darkest gray; 63 results in lightest gray.

a. Press

b. Press

CONTROL, G

ENTER

ENTER

CONTROL, G, O

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, G, l

ENTER

andO(alpha) keys. Display = Gray Background (O:Outer l:Inner)

[Ent]=O_

key. Display = Gray Value Outer (0 to 63) [Set_up =

0] [Ent] = _

key. The background behind the image becomes

white.

(alpha) and

ENTER

key. Display = Gray Value Inner for 2D (0 to 63)

. Background becomes black0.

andBkeys. Display = Gray Background Inner (B:2D M:M

ENTER

keys.

D:Q) [Ent] =B_

[Set-Up = 45] [Ent] = _
The current value will be displayed (in this
example 45").

c. Type in a 63 to obtain brightest value.
d. Press ENTER key. The BĊmode display becomes white.
e. Turn RT 6000/RT 6800 off, then on. The BĊmode display becomes darker (default

grayscale setting = 0).

4-2-41 MĊmode Gray Background Level Control Test

This control function allows you to adjust the MĊmode image display making it lighter or darker. To adjust the
background of the image screen, use the Control GO function.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press B/MĊmode key. B/MĊmode appears.

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4Ċ2Ċ41 MĊmode Gray Background Level Control Test (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

b. Press

c. Press

d. Type in a 63 to obtain brightest value. The current value will be displayed (in this

e. Press
f. Turn RT 6000/RT 6800 off, then on. The MĊmode display becomes darker (default

4-2-42 Doppler Units: Doppler Gray Background Level Control Test

This control function allows you to lighten or darken the Doppler (Q-mode) image.

a. Press B/PD key. B mode/Pulse Doppler display appears.
b. Press

c. Press

CONTROL, G, l

ENTER

ENTER

CONTROL, G, l

ENTER

key. Display = Gray Value Inner for M (0 to 63)

key. The MĊmode display becomes white.

Operator Action Verifiable RT 6000/RT 6800 Action

key. Display = Gray Value Inner for Q (0 to 63)

and M keys. Display = Gray Background Inner (B:2D M:M

D:Q) [Ent] =M_

[Set_Up = 45] [Ent] = _

example 45").

grayscale setting = 0).

andDkeys. Display = Gray Background Inner (B:2D M:M

D:Q) [Ent] =Q_

[Set_Up = 45] [Ent] = _
The current value will be displayed (in this
example 45").

d. Type in a 63 to obtain brightest value.
e. Press
f. Turn power switch off, then on. Display reverts to default brightness setting.

4-2-43 Help Menu-Test

a. Type

b. T ype any softkey to Exit. Previous display reappears.

ENTER

CONTROL, H

key. The Doppler image becomes white.

Operator Action Verifiable RT 6000/RT 6800 Action

and

ENTER

keys. The Help menu, listing all to the softkey codes

and their functions, is displayed.

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4-2-44 2D Image Invert Control Test

This control function allows you to invert the 2D image, displaying it as White on a Black background or Black on a
White background.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press BĊmode key. BĊmode image appears.
b. Press

c. Type 2. Display = Image/2D Invert (1 :W/B 2:B/W) [Ent]

d. Press

e. Type

f. Press

4-2-45 Doppler Units: Doppler Image Invert Control Test

This control function allows you to invert the Doppler image, displaying it as White on a Black background or Black
on a White background.

a. Select an image display format that includes Doppler.
b. Press

CONTROL, l

ENTER

CONTROL, l, B

ENTER

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, I

andBkeys. Display = Image/2D Invert (1 :W/B 2:B/W)

[Ent]=_
The current selection will be highlighted.

=

2

key. The image screen will invert to black on white

background. (Image looks white).

and1. The image screen will return to white on black

background. (Image looks dark gray).

key.

andDkeys. Display = lmage/Q Invert (1:W/B 2:B/W)

[Ent] = Q
The current selection will be highlighted.

c. Type in 2". Display = Image/2D Invert (1:W/B 2:B/W) [Ent]

=

2

d. Press

e. Type
f. Press

ENTER

CONTROL, I, D

ENTER

key. The image screen will invert to black on white

key. The image screen will return to white on black

background.

and1keys. Display = lmage/Q Invert(1:W/B 2:B/W) [Ent]=

background.

4-30

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4-2-46 MĊmode Image Inversion Test

This control function allows you to invert the MĊmode image, displaying it as White on a Black background or Black
on a White background.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press the B/MĊmode key. Combination BĊmode/MĊmode appears.
b. Press

c. Type the 2 key. Display = lmage/M Invert (1:W/B 2:B/W) [Ent] =

d. Press

e. Type

f. Press

4-2-47 SCR Equipped Units Only: SCR PRINT (Comments on Stripchart) Test

When this function is on", comments (including the date, hospital name, time and system settings) will be printed at
the end of a stripchart.

a. Press

b. PressCkey. Display = LSR Character Print On/Off [Ent]

CONTROL, l

ENTER

CONTROL, l, M

ENTER

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, J

andMkeys. Display = lmage/M Invert (1:W/B 2:B/W)[Ent]=

M

The current selection will be highlighted.

2

key. The image screen will invert to black on a white

background.

and1keys. Display = Image/M Invert (1:W/B 2:B/W) [Ent] =

1

key. The image screen will return to white on a black

background.

key. Display = LSR (C:Character P:Page On Frz

S:Page on Stp N = Narrow) = _

Depending on the last selection, either On" or
Off" will be highlighted.

c. Press

d. Press SCR Power switch to ON position.
e. Press B/MĊmode key on RT 6000/RT 6800. Combination BĊmode/MĊmode image

f. Press Strip key on RT 6000/RT 6800. SCR prints stripchart.

g. Press Strip key again. Stripchart stops with date, hospital, machine

h. Press

ENTER

proceed to step d; otherwise repeat steps
a-c above.

Wait 10 seconds.

CONTROL, J, C

key. lf Off" was highlighted,

and

ENTER

keys. Comment function is disabled.

4-31

appears.

settings, etc. printed at top.

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4-2-48 SCR Equipped Units Only: SCR PRINT (FREEZE" KEY) Test

Turning on this function causes the SCR to make a page print each time you freeze the ultrasound image.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press

b. Press

c. Press Freeze key on RT 6000/RT 6800. Image freezes; SCR prints page print, then stops.
d. Press Freeze key again. Image unfreezes.
e. Press

4-2-49 SCR Equipped Units Only: SCR PRINT (Page Print after Strip Chart Recording) Test

When this function is on", a single page print will be printed after a stripchart recording (MĊmode or Doppler
mode) is completed.

a. Press

b. Press

CONTROL, J

ENTER

proceed to step c; otherwise repeat step a.
to enable function.

CONTROL, J, P

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, J

ENTER

proceed to step c. Otherwise, repeat steps a
and b to enable function.

andPkeys. Display = SCR Page Print When System Frozen

key. If Off" was highlighted

and

ENTER

andSkeys. Display = SCR Page Print When Chart Drive

key. If Off" was highlighted,

keys. Page printing on image freezing is disabled.

On/Off [Ent] =_
The current selection will be highlighted.

Stopped On/Off [Ent] =
The current selection will be highlighted.

S

c. Press Strip key on RT 6000/RT 6800, wait Strip chart streams from SCR.

five seconds.

d. Press Strip key again. Strip charting stops, page print appears, paper

stops.

e. Press SCR power switch to turn off SCR.

4-2-50 VCR Equipped Units Only: VCR Search Speed T est

This control function allows you to program the blue key on the RT 6000/RT 6800 front panel to search the videotape
in the VCR at one of four speeds selected by the operator.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Turn on the VCR; load a tape.
b. Press

CONTROL, K

key. Display = VCR Seach Speed (1 :x1 2:x2 3:x6

4:x10) [Ent]=_
The current selection is highlighted.

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4Ċ2-50 VCR Equipped Units Only: VCR Search Speed Test (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

c. Type a 1. Display = VCR Seach Speed (1:x1 2:x2 3:x6

4:x10) [Ent] = _
The 1:x1 selection is highlighted.

d. Press the
e. Press the unmarked blue key on RT

6000/RT 6800 front panel.

f. Press theLkey on RT 6000/RT 6800. Tape searches backward at normal speed. (As

g. Press the Stop key, then press the R key Tape searches backward at normal speed.

on the RT 6000/RT 6800.

h. Repeat steps b through g, substituting

2, 3 and 4 for 1 in step c. This selects the x2,
x6 and x10 search speeds, respectively.

4-2-51 2D Image Size Test

This control function changes the size of the 2D image on the screen during B/MĊmode.

a. Press the BĊmode key on RT 6000/RT 6800. 2D (BĊmode) sector image appears on screen.
b. Press

c. Type a 2. Display= 2D Size Program (1:2/3 2:1/3 3:3/2~1/3)

ENTER

CONTROL

key. The x1 realtime VCR search speed is enabled.

seen on monitor).

Operator Action Verifiable RT 6000/RT 6800 Action

andMkeys. Display= 2D Size Program (1:2/32:1/33:3/2-1/3)

[Ent] =_
The current selection is highlighted.

[Ent]=
The 2:1/3 selection is highlighted.

2

d. Press

4-2-52 SECTOR/PRGM Test

a. Press the B/MĊmode key. BĊmode display fills one third of screen.

b. Press the Sector/Program key on Full size MĊmode image appears.

c. Press the Sector/Program key again. 1/3 BĊmode image; 2/3 MĊmode image

ENTER

RT 6000/RT 6800.

key. New 2D size factor is entered into memory.

Operator Action Verifiable RT 6000/RT 6800 Action

4-33

MĊmode display fills two thirds of screen.

appears.

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4-2-52 SECTOR/PRGM Test (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

d. Press the Sector/Program key again. Full size MĊmode image reappears.
e. Turn RT 6000/RT 6800 power off, then on. Sector/Program operation is disabled. BĊmode

image appears.

4-2-53 Acoustic Power Display Test

This control function allows you to display the Acoustic Power level on the image screen. Note that Acoustic Power
toggle returns to its default on or off condition on powerdown.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press

b. Press

c. On upper panel, turn Acoustic Power AP:xx in display increases to 100 (dB); decreases

4-2-54 Error Display Time Test

Variouserror messages are displayed when the wrong key is pressed, etc. This control function allows you to set the
length of time these messages are displayed on the screen.

a. Press

b. Type a 2 for a five second error display.
c. Press
d. lf RT6000/RT6800 is equipped with a

CONTROL, O

ENTER

pot clockwise, then counterclockwise. to 0 (dB)

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, O

ENTER

VCR, turn VCR power off via its power
switch. Otherwise, continue to next step.

and

A1,

keys. Display =

[Ent]=

key . Depending on the last selection, the Acoustic

Power will be on (displayed) or off (not displayed).
Display = AP:xx EE:xx GM:xx LMT:xx

andEkeys. Display = Change Error Display Time (0:Off

The current selection is highlighted.

key. The error display time is entered into memory.

Acoustic Power Display (0:Off 1:On)

The current selection is highlighted.

:3 2:5 3:7) [Ent] = _

e. Press Play key on RT 6000/RT 6800 . Error message is displayed.

Verify error message is displayed for five
seconds.

f. lf RT6000/RT6800 is equipped with a

VCR, turn VCR power back on.

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4-2-55 Doppler Units: Doppler Frequency Marker Test

This control function allows you to display the frequency marker on the Doppler Waveform.

Operator Action Verifiable RT 6000/RT 6800 Action

a. lf not connected, connect a doppler Combination BĊmode/Pulse Doppler image

probe to the RT 6000/RT 6800; appears.

press the BĊmode/PD key.

b. Press

c. Press

d. Press

4-2-56 2D Transducer Parameter Test

This control function programs the system settings for each transducer in 2D mode. It also programs the
for recalling these settings.

a. Press the BĊmode key. BĊmode (2D) image is displayed.
b. Press the Dynamic RangeYkey until

c. Press

d. Press

CONTROL, O

ENTER

display.

CONTROL, O, F 0

Operator Action Verifiable RT 6000/RT 6800 Action

DR: 60 is displayed on the CRT.

CONTROL, P

ENTER

(alpha) &

key. Doppler frequency is displayed. Verify doppler fre

and

andBkeys. Display = Preset Xducer Parameter (B:2B M:M

key. The current BĊmode (2D) image parameter of

F1

keys. Display = Frequency Marker (0:Off 1 :On) [Ent] =

The current selection is highlighted.

quency is displayed in lower left corner of doppler

ENTER

keys. Doppler frequency display disappears.

D:D) [Ent]=

60 dB dynamic range FOR SELECTED PROBE
ONLY is entered into memory.

B

AUTO

Key

e. Turn RT 6000/RT 6800 off, then on. The new default dynamic range setting should

read DR: 60.

4-2-57 MĊMode Parameter Preset Test

This control function programs the system settings for each transducer inĊM mode. This also programs the
key for recalling these settings.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press B/MĊmode key. BĊmode/MĊmode images appear.
b. Set Dynamic Range for 60 dB as

displayed on CRT.

c. Press

CONTROL, P

andMkeys. Display = Preset Xducer Parameter (B:B M:M

D:D) [Ent] =

4-35

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4-2Ċ57 MĊMode Parameter Preset Test (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

d. Press

e. Turn RT 6000/RT 6800 off, then on. The default dynamic range setting on CRT should

f. Press the Dynamic Range▼key to

g. Press

h. Press

i. Turn RT 6000/RT 6800 off, then on. The default dynamic range setting on CRT should

4-2-58 Doppler Units: Doppler Parameter Preset Test

Use this control function to program the system settings for each Doppler transducer in 2D mode. This also
programs the AUTO key for recalling these settings.

ENTER

Select B/MĊmode. equal 60 dB FOR SELECTED ATTACHED PROBE

select 54 dB dynamic range as displayed
on the CRT.

CONTROL, P

ENTER

Select B/MĊmode. equal 60 dB FOR SELECTED PROBE ONLY.

key. The current MĊmode parameter of 60 dB

dynamic range FOR SELECTED PROBE is
entered into memory.

ONLY.

andMkeys. Display = Preset Xducer Parameter (B:B M:M

D:D) [Ent]=

key. The current BĊmode (2D sector) image

parameters are entered into memory FOR
SELECTED PROBE ONLY.

Operator Action Verifiable RT 6000/RT 6800 Action

B

a. Press the B/PDĊmode key. BĊmode/Pulse Doppler mode display appears.
b. b. Press the

pot in the Doppler controls to set the
sample volume length to 7 mm, or
(The sample box changes size as you turn
the unmarked pot).

c. Press the Wall Filter key. Adjust the

unmarked pot in the Doppler controls
for a 400 Hz cutoff frequency (WF:400).

d. Press

e. Press

f. Turn RT 6000/RT 6800 off, then on. The default settings = previously programmed

CONTROL, P

ENTER

Press B/PDĊmode key.

SVL

key. Use the unmarked

SVL

:7.

andDkeys. Display = Preset Xducer Parameter (B:B M:M

D:D) [Ent]=

key. The current Doppler mode image parameters are

entered into memory FOR SELECTED PROBE
ONLY.

AUTO

4-36

key settings.

D

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4-2-59 Dotted Line Between Measurement Cursors Test

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press

b. Press
c. Operate trackball. Dots should appear as trackball is rotated.
d. Press

4-2-60 Register Abbreviations Test

Use this control function to program in any abbreviations. Once you have done this, you can use the COMMENT
function to display them on the screen.

a. Press
b. Press

c. Type abbreviation. For example:
d. Press
e. Press

CONTROL Q

ENTER

CONTROL, Q1

to turn off dot line display function.

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, R
ENTER

ENTER
CONTROL

and1keys. Display = Dot Line Display (0:Off 1 :On)

key.

and

ENTER

andAkeys.

key. Display = Reg./Abbreviation (Cap./Abbr.)

S/Stenosis.

key. The word

key. The word

keys

[Ent] = _
The current selection is highlighted.

[Ent] =

S/Stenosis
S/Stenosis

A

appears.
appears.

f. Press

4-2-61 Register Footswitch Test

Use this control function to program the footswitch to activate the FREEZE function, play the VCR or operate the
SCR.

a. Press

b. lf 1:Freeze is not highlighted, type a 1.

c. Press
d. Scan a phantom in any mode.

COMMENT

the

SHIFT

Otherwise, proceed to step c.

key and press

Operator Action Verifiable RT 6000/RT 6800 Action

CONTROL, R

ENTER

key, then hold down The word

S.

andFkeys. Display = Reg./Foot SW. (1:Freeze 2:VCR P.

key. Freeze footswitch fucntion is enabled.

S/Stenosis

3:SCR DRV.)
The current selection is highlighted.

appears.

4-37

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4-2-61 Register Footswitch Test (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

e. Press footswitch one time. Image freezes.
f. Press footswitch again. Image becomes real time again.

4-2-62 35 mm Polaroid/35 mm Equipped Units Only: Register Record by Polaroid/35 mm T est

This control functions permits footswitch control of recording by Polaroid camera (using 667 Polaroid film) or 35 mm
camera.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press

b. T ype a 1, if unit is PolaroidĊequipped;

c. Press
d. Press footswitch. A click is heard, indicating the camera shutter has

4-2-63 P attern Package T est

This control function programs in either the Cardiac or Body Pattern Package. Then use the Land R keys along with
the trackball to select the patterns to be displayed on the image screen.

a. Press CONTROL , R and J keys. Display = Reg./Pattern Package (1 :Cardiac

b. Type a 2. Body pattern package is selected.
c. Press
d. Press

R, G

and

ENTER

a 2 if it is 35 mm-equipped.

ENTER

ENTER
CONTROL

key .

Operator Action Verifiable RT 6000/RT 6800 Action

key. Body pattern package is entered into memory.

keys. Display = Reg./Rec Gamma (1:Polaroid 667

key.

2:35 mm Film) [Ent] = _

The current selection is highlighted.

operated.

2:Body) [Ent]=_

The current selection is highlighted.

CONTROL LED

lump goes off.
e. Press dual B-mode key twice. Dual B-mode display appears.
f. PressLin Pattens block of keys. Menu appears on left side of screen. Menu reads:

Supine, R. OBLQ, L. OBLQ, Left, Neck, R Neck,
L Neck, Man.

g. Press BĊmode key. B-mode display appears.

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4Ċ2Ċ63 Pattern Package Test (continued)

Operator Action Verifiable RT 6000/RT 6800 Action

h. Press dual BĊmode key twice. Dual BĊmode display appears.
i. PressRin Pattens block of keys. Menu appears on right side of screen. Menu

reads: Supine, R. OBLQ, L. OBLQ, Left, Neck, R
Neck, L Neck, Man.

j. Rotate trackball to display the eight

body patterns.

k. Repeat steps a through j. Type a 1

to select the standard cardiac pattern
package. (This is the default patterns
display).

4-2-64 M-Mode Peak Hold Control Test

Use this control function to prevent blurring of a fast moving object such as a heart valve during two-channel
MĊmode display.

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press B/MĊmode key. BĊmode/MĊmode appears.
b. Press

c. Press
d. Press

4-2-65 2D Edge Enhancement Test

a. Press BĊmode key. BĊmode image appears.
b. Press

c. Type in a number 6(1 = no (0 dB) edge

d. Press

CONTROL, W

ENTER
W, 0

MĊmode peak hold function.

CONTROL, X

enhancement 6 = greatest (6 dB) edge
enhancement)

ENTER

key. lf Peak Hold is toggled on.

and

Operator Action Verifiable RT 6000/RT 6800 Action

key. Six dB edge enhancement factor is entered into

and1. Display = MĊmode Peak Hold (0:Off 1 :On)

ENTER

to disable the

andBkeys. Display = lmage Edge Enhancement for B

[Ent] =_

The current selection is highlighted.

(1 to 6) [ENT]=_

memory.

e. Observe edge enhanced 2D (BĊmode) lmage should appear sharper, more defined.

image.

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4-2-66 MĊMode Edge Enhancement Test

Operator Action Verifiable RT 6000/RT 6800 Action

a. Press B/M key; then press the

BĊmode/Prog. key until only MĊmode
display appears.

b. Observe MĊmode display as you scan

a phantom.

c. PressXandMkeys. Display = Image Edge Enhancement for M

(1 to 6) [Ent]=_

d. Type in a 6. 1 = no edge enhancement

6 = greatest edge enhancement

e. Press

f. Observe MĊmode display as you scan Image should appear sharper, more defined than

4-2-67 SCR Equipped Units Only: SCR Edge Enhancement Test

a. Turn on SCR power. Press

b. After 10 seconds, press

c. Press

d. Type in a 6. 1 = no edge enhancement

e. Press

ENTER

a phantom with a probe. before change.

on RT 6000/RT 6800 lower panel as
you scan a Phantom with a probe.

again. Tear off strip for later comparison.

CONTROL, X

ENTER

key. Display =

into memory.

Operator Action Verifiable RT 6000/RT 6800 Action

STRIP

STRIP

andLkeys. Display = Image Edge Enhancement for SCR

key. Six dB edge enhancement factor is entered into

key

key

6 = greater edge enhancement

memory.

Control

Six dB edge enhancement factor is
entered

(1 to 6) [Ent]=_

_

f. Press

STRIP

with a probe. Press it again after 10 seconds. contrast than old stripchart.
Compare stripcharts.

key as you scan a Phantom New stripchart should be sharper and have more

4-40

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5-1 INTRODUCTION

The RT 6000/RT 6800 is an ultrasound cardiac scanner. Cardiac imaging is done with a narrow beam, narĆ
row aperture transducer, while a wide aperture beam is used for imaging the abdominal region. Wide aperĆ
ture scanning is also suitable for imaging circulatory organs, embryos, neonates and the kidneys.

5-1-1 Cardiographic Scanner

The RT 6000/RT 6800 Cardiographic Scanner is equipped with a sophisticated, high performance Doppler
system that employs Continuous Dynamic Aperture (CDA) and Continuous Dynamic Focus (CDF) to proĆ
vide superior image quality. The RT 6000/RT 6800 also has color flow mapping as an option that will enĆ
hance the diagnostic capabilities of the standard system with doppler only. The standard RT 6000/RT 6800
transducers can operate over a wide range of center frequencies.

5-1-2 Scanning Functions

Besides the functions described above, the RT 6000/RT 6800 is capable of:

a. High frequency MĊmode imaging, ECG and PCG processing;
b. Cardiac performance measurements and calculations by means of optional Cardiac MeasureĆ

ment and Calculation software;
c. Impulse, burst wave, and continuous wave Doppler imaging.
d. High Pulse Repetition Frequency (HPRF) operations;
e. P ulse Doppler/Continuous Wave Doppler operations using the same probe.
f. Color flow mapping capabilities in 2D M and doppler modes.

5-2 PRINCIPLES OF ULTRASOUND IMAGING

Ultrasound imaging is based on the sonar principle. A short, high voltage sound pulse is transmitted from
the transducer's piezoelectric element into a medium of known density and propagation velocity, in this
case, soft tissue.

5-2-1 Ultrasound Vave Travel

As the sound travels out and back, an electronic device is used to measure the travel time, i.e., the ultraĆ
sound imaging circuitry. Knowing the travel time (goĊreturn time) and the velocity of the ultrasound wave,
the distance traveled can be calculated and displayed on a CRT display monitor.

5-2-2 Reflection

The propagation velocity of an ultrasound wave traveling through different types of body tissue averages
1540 meters per second and is fairly consistent. However, signal reflection from soft tissue averages less
than 1 %, while soft tissueĊbone interface signal reflections increase to about 48 %. Strong signal reflecĆ
tions appear as lighter images, while weaker signal reflections appear as darker images.

5–1

THEORY

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5-2-3 Ultrasound Display Types

Echoes are displayed as a function of distance by one of five methods:

a. Amplitude (A) Mode: (Not available on RT 6000/RT 6800). This is simply a one-dimensionaI

oscilloscope type display showing echo return amplitude on the vertical axis versus body depth

on the horizontal axis. (See Illustration 5Ċ1a). If transducers were only equipped with one piĆ

ezoelectric element and no mechanical positioners, this would be the only display available.

However, The RT 6000/RT 6800 transducers contain arrays of up to 64 piezoelectric elements

to develop the BĊMode and MĊMode displays discussed below.

b. Brightness (B) Mode: (Available on RT 6000/RT 6800). This two-dimensionaI display mode

permits the operator to see ultrasound images of body tissue, bones and organs. These are

the standard displays shown in Illustration 5Ċ1b. They are cross sectional views of the body

organs beneath the transducer displayed at their relative depth as measured in centimeters.

(The deepest area scanned appears at the bottom of the CRT; the skin next to the transducer

appears at the top).

The B Mode display is obtained by plotting, or mapping, echo source locations and intensities

as display pixels.The brightness of each pixel represents the strength or amplitude of the reĆ

turning echoes. Normally, the brighter the pixel, the stronger the returning echo.

This display method requires a transducer with an array of piezoelectric elements. The eleĆ

ments in the array are sequentially pulsed and the returning echoes are processed to obtain an

image.

c. Motion (M) Mode: (Available on RT 6000/RT 6800). This display is formed by plotting brightness

mode information on the vertical axis versus time on the horizontal axis (See Illustration 5Ċ1

c). Motion studies are used to detect fetal heart rates, heart valve functions and other cardiac

functions.

d. Continuous Wave (CW) Mode: (Available on RT 6000/RT 6800). This doppler mode was develĆ

oped for echocardiographic blood flow surveys. In this mode, echo returns from all body

depths are sampled and converted to video. Good focus at all body depths permits the operaĆ

tor to measure the high blood flow velocities typical in cardiac pathology.

e. Pulse Echo (PE) Mode: (Available on RT 6000/RT 6800). Anotherdoppler mode display used

in echocardiography. This mode isolates problem areas, measuring blood flow in a specific

vein or artery. Depth of focus is shallow. Only echo returns from a specific body depth are

sampled.

f. Color Flow Mapping (CFM) Mode: (Available as an option on RT 6000/RT 6800). CFM Mode

uses the same principles as doppler, however the system will assign a color value correspondĆ

ing to the blood flow direction. Different mapping modes can be used to display direction only,

direction and flow velocity, or direction, flow velocity and variance (turbulent flow). The CFM

Mode is useful to survey a large cardiac region and can display flow direction, velocity and turĆ

bulence simultaneously.

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5-2-3 Ultrasound Display Types (continued)

ILLUSTRATION 5-1a

ILLUSTRATION 5Ċ1b ILLUSTRATION 5Ċ1 c

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5-2-4 Beam Focusing

Ultrasound energy from a group of elements is formed into a beam for scanning purposes. This beam must
be focused, or narrowed, down, to a specific area called the focal zone to obtain a sharp image at the body
depth under examination. Focal zone depth depends on four factors:

a. Ultrasound signal frequency, which varies according to transducer type.
b. Aperture size of transducer array (the number of piezoelectric transducer elements). This is

another reason for the need for different transducer types.
c. Radius of curvature of each group of piezoelectric elements. (Each group of elements is

shaped like a parabola to focus its beam at a certain body depth).
d. The type of electronic focusing method employed. The RT 6000/RT 6800 utilizes phase delay

techniques to optimize focus at specific body depths.

Transducer Types

Since a narrow beam is necessary to resolve small anatomical detail, it would be ideal to produce a uniformĆ
ly narrow ultrasound beam able to penetrate to any body depth. Unfortunately, this is currently impossible.
Therefore, different transducers have been designed to optimize focus at specific body depths.

5-2-5 Echo Signal Processing

Echo returns vary in amplitude, frequency and return time. Not only is this caused by varying acoustic imĆ
pedances of different types of body tissue and bone, it is also caused by the attenuation of the ultrasound
signal as it travels through the body.
Typically, a dynamic range of more than 100 dB exists between the strongest near field echoes and the
weakest far field echoes just above the noise threshold. The strong near field echo returns must be IogarĆ
hythmically compressed prior to signal detection to compensate for increased signal attenuation of echoes
returning from deeper body depths. This permits a uniform display of the echo source, regardless of body
depth. Signal compression is done by the Log Amplifier Assy.

5-2-6 Time Gain Compensation (TGC)/Tirne Frequency Compensation (TFC)

TGC varies echo gain to compensate for the greater attenuation occurring to echoes from greater body
depths.

1. On power up, RT 6000/RT 6800 software assigns default values for ten TGC gain levels to echoes from
ten body depth zones. The operator can modify these settings by means of ten TGC slider potentiomeĆ
ters on the front panel.

2. Time frequency compensation (TFC) varies the bandpass frequency of the detector in the analog reĆ
ceiver circuitry. This compensates for shifts in the bandpass center frequency spectrum of echoes reĆ
turning from greater body depths.

5-2-7 Doppler Operation

This function is performed by the l Doppler, Audio, and FFT cards in the card cage. Continuous Wave (CW)
and Pulse Echo Doppler modes are available. (A special two element CWB doppler probe is required for CW
operation).

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5-2-7 Doppler Operation (continued)

Doppler mode monitors venal, arterial, and/or cardiac blood flow volume and velocity, two important carĆ
diac parameters. It operates on the Doppler principal, where the sound made by a traveling object (such as
blood) shifts in frequency as it moves past the dopplertransducer. The FFTcards samples frequency and
amplitude shifts in the doppler signal to measure blood flow volume and velocity.

5-2-8 Optional Color Flow Operation

This function is performed by the optional color flow module (CFMP1 and CFMP2) in the card cage. Color
2D, color MĊMode, and color doppler modes are available. CFM can be performed with all standard RT
6000/RT 6800 sector transducers.

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5-2-8 Optional Color Flow Operation (continued)

COLOR FLOW MAPPING SUBSYSTEM

ILLUSTRATiON 5-2(a)

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5-2-8 Optional Color Flow OperatIon (continued)

COLOR FLOW MAPPING SUBSYSTEM

ILLUSTRATION 5-2(b)

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5-3 RT 6000/RT 6800 SYSTEM DESCRIPTION

The RT 6000/RT 6800 is divided into the major components shown below:

①
②
②
④
⑤
⑥
⑦
⑧
⑨

Monitor CRT (12" diag.)
Keyboard
Camera Unit (Optional)
VTR (Video Tape Recorder) (Optional)
SCR (Strip Chart Recorder) (Optional)
Power Supplies
Console
T ransducers
Card Cage

RT 6000/RT 6800 MAJOR COMPONENTS

ILLUSTRATION 5-3

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5-3-1 RT 6000/RT 6800 Card Cage

The card cage contains up to 21 PC Boards that control, monitor, and process the transmit and receive
echographic signals. Table 5Ċ1 lists these PC Boards and their corresponding card slots in the card cage:

TABLE 5-1

PC BOARD LOCATIONS

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5-3-2 System Block DIagram

Illustration 5Ċ4 is a system block diagram of the RT 6000/RT 6800 Ultrasound System. To simplify the sysĆ
tem, the circuit Board assemblies have been grouped together in several subsystems. Table 5Ċ2 shows
these subsystems, their functions, and their PC Boards. PC Board descriptions follow Table 5Ċ2.

TABLE 5-2

RT 6000/RT 6800 SUBSYSTEMS

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This page is left blank intentionally.

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5-3-2 System Block Diagram (continued)

RT 6000/RT 6800 SYSTEM BLOCK DIAGRAM

ILLUSTRATION 5-4(a)

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5-3-2 System Block Diagram (continued)

RT 6000/RT 6800 SYSTEM BLOCK DIAGRAM

ILLUSTRATION 5-4(b)

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5-4 PC BOARD ASSY DESCRIPTIONS

5-4-1 Transmitter (TRA) Assy

Function : Based on RTC inputs, develops transmit pulses; steers transmit pulses to

proper transducer elements for different image modes.

Controlled By : Real Time Controller (RTC) Assy via USC Bus.

Inputs Come From : HV Power Supply; RTC Assy, IOP Assy.

Outputs Sent T o : Connector Assy, Color Doppler Assy , etc.

Functional Description

Referring to Illustration 5Ċ5, the Transmitter Assy Block Diagram, this PC Board can be divided into two
sections:

a. Transmit Wave Generator;
b. Beam Steering Section;
c. Switch and Safety Circuit;
d. Transmit Clocks Section

1. Transmit Wave Generator: Generates the SINE and SINC transmit waves. The basic pulse repetition
frequency (PRF) is determined by Carrier Frequency Select (CF 0Ċ2) from the RTC Assy. Burst NumĆ
ber (BN1Ċ3) from the RTC Assy defines the number of transmit pulses fired during one transmit periĆ
od.

2. Beam Steering Section: This section has three functions.

a. First, its shift registers steer the transmit pulse to the proper element in the transducer array

during using TDSD bus delay signals from the RTC Assy.

b. Second, the HlC stage amplifies the transmit wave using +/- MVE 15 VDC HV Assy signals.

These signals are summed with 35 VĊ89 V HV transmit voltage at a transformer secondary
within the HlC to produce the 64 (maximum) transmit pulses sent to the transducer elements.

c. Third, it low pass filters transmit pulses during Continuous Wave (CW) Doppler mode.

3. Switch and Safety Circuit: This section disables HV transmit voltage and disables transmit wave transĆ
mission when HV voltage exceeds specified limits for the operating mode, the CPU overruns (HARTY
high), or the probe is not connected (POPEN true). TINH/(Transmit Inhibit) goes low true to disable
the transmit pulses.

4. Transmit Clocks Section: This section produces the clock signals required by the TransmitterAssy and
the TRlG and TRIG/clocks sent throughout the RT 6000/RT 6800 System.

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5-4-1 Transmitter (TRA) Assy (contInued)

TRANSMITTER ASSEMBLY BLOCK DIAGRAM

ILLUSTRATION 5-5

5-4-2 High Voltage Power Supply Assy

Function : Supplies the variable +/Ċ 35 Ċ 89 VDC

transmit pulse voltage to the Transmitter Assy.

Controlled By : IOP Assy via the I/O Connector Assy.

Outputs Sent To : Transmitter Assy

Functional DescrIptIon

Referring to Illustration 5Ċ6, the HV Assy Block Diagram, this PC Board can be divided into four functional
blocks:

a. HV Regulated DC Power Supply;
b. DA Converter;
c. Isolator;
d. HV Disable Circuit.

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5-4-2 High Voltage Power Supply Assy (contInued)

1. HV Regulated DC Power Supply: This section converts the +/- 1 00VAC input from the secondary
of the power transformer into a +/- 35 to +/- 89 V (Approx) transmit pulse supply voltage. The exact
voltage produced depends on factors such as ultrasound mode and transducerfrequency and type.
In doppler mode, pulse repetition frequency and focus zone also help determine the transmit pulse
supply voltage level.

2. lsolator: This section AC isolates the PVOLT, HVS, HART and SHTDWN signals.

3. D/A Converter: The PVOLT bus, which is generated by the IOP Assy, determines the level of the transĆ
mit pulse supply voltage. A digital to analog converter converts the digital value to complementary posĆ
itive and negative analog control voltages. This occurs when HVS/f rom the lOP Assy goes true. These
voltages control the +HV and ĊHV pass FETsin the HV Regulated DC Power Supply to control output
of transmit power.

4. HV Disable Circuit: In case of a power failure or catastrophic system failure, SHUTDOWN/and/or
HART/signal from the lOP Assy goes low true. This causes this circuit and transistors Q2 and Q3 in
the HV Regulated DC Power Supply section to ground the HV outputs.

HIGH VOLTAGE (HV) POWER SUPPLY BLOCK DIAGRAM

ILLUSTRATION 5-6

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5-4-3 Primary Delay Sum (PDS) Assy

Function : This Board removes the strong body surface echo component and amplifies the

echo returns from the Transducer. It also sums adjacent echo return (ES) chan-

nels and variably delays the ES signals to produce a 32 channel delayed output

from the 64 channel ES input.

Controlled By : RTC Assy via the USC bus.

Inputs Come From : Connector (CONN) Assy, RTC Assy.

Outputs Sent To : Continuous Dynamic Aperture & Focus (CDAF) Assy.

Functional Description

Referring to Illustration 5Ċ7, the PDS Assy Block Diagram, the PDS Assy is divided into two functional
blocks:

a. R-Module
b. Summing and Delay Section

1. RĊModule: This section contains a Iimiterfor removing strong body surface echoes and a Pre Gain
Amplifier for performing firstĊstage amplification.

2. Summing and Delay Section: This section sums adjacent echo channels of the 64 channel echo input;
then variably delays the paired echo returns to roughly align far field and near field echo returns for
later processing.

PRIMARY DELAY SUM (PDS) ASSY BLOCK DIAGRAM

ILLUSTRATION 5-7

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5-4-4 ContInuous Dynamic Aperture & Focus (CDAF) Assy

Function : Receives the 32 Channel Echo Return SUM bus from the PDS Assy to process

them with the continuous dynamic aperture (CDA) and continuous dynamic fo
cus (CDF) circuitry.

Controlled By : RTC Assy via the USC bus.

Inputs Come From : PDS Assy and RTC Assy.

Outputs Sent To : Crosspoint Switch (XPSW) Assy.

Functional Description

Referring to Illustration 5Ċ8, the CDAF Assy Block Diagram, the CDAF Assycan be divided into four funcĆ
tional blocks:

a. Summing Section;
b. CDA Module;
c. CDF Module;
d. Impedance Matching Section.

1. Summing Section: Summing op-amps sum the SUM and SUMR return echo signal inputs from the
PDS Assy.

2. CDA Module: This section controls the aperture of the transducer array, progressively disabling chanĆ
nels on either end of the array for near field imaging to reduce echo sidelobes. These sidelobes would
appear as false images, or artifacts, on the monitor.

3. CDF Module: This section enables received signals to optimize the focus over several focal zones by
means of variable delay lines consisting of fixed inductors and variable capacitors. The Ċ2.5 V to +2.5
V CDFF signal controls the amount of delay applied.

4. Impedance Matching Section: This section compensates for the variable impedance induced by the
variable delay lines by means of a variably resistant diode bridge. Thus, the output of the CDAF Assy
is impedance matched to that of the Crosspoint Switch (XPSW) Assy.

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5-4-4 Continuous Dynamic Aperture & Focus (CDAF) Assy (continued)

CDAF ASSY BLOCK DIAGRAM

ILLUSTRATiON 5-8

5-4-5 Crosspoint Switch (XPSW) Assy

Function : This PC Board sums the delayed 32 echo return channels into one channel. It also

provides a rough secondary delay that complements the fine delay provided by
the PDS Assy.

Controlled by : RTC Assy.

Inputs Come From : CDAF and RTC Assemblies.

Outputs Sent To : Log and optional Color Doppler Assemblies.

Functional Description

Referring to Illustration 5Ċ9, the XPSW Block Diagram, the XPSW Assy can be divided into two functional
blocks:

a. Crosspoint Switch Section;
b. Delay and Summing Section.

1. CrosspointSwitch Section: This section utilizes several banks of multiplexers to reorganize the 32 echo
channels for output, depending on scanline information. CHA0Ċ4from the RTC Assy selects the
multiplexer outputs.

2. Delay and Summing Section: This section provides 48 levels of coarse delay, varying from 0 nsec to
9200 nsec in 200 nsec increments. This coarse delay complements the fine (20 nsec) incremental
delay provided by the PDS Assy. It is produced by decoding the SDSD bus from the RTC Assy. This
section also parallel to serial converts the echo signals, which are sent to the Log Assy as differential
ECHO +/Ċ signal.

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5-4-5 Crosspoint Switch (XPSW) Assy (continued)

CROSS POINT SWITCH (XPSW) ASSY BLOCK DIAGRAM

ILLUSTRATION 5-9

5-4-6 Logarithmic Amplifier (LOG) Assy

Function . This PC Board Log compresses, detects (rectifies), and performsother signalpro

cessing on the echo signal from the XPSW Assy.

Controlled By : RTC Assy.

Inputs Come From : XPSW Assy, RTC Assy.

Outputs Sent To : CVDO Assy, RSC Assy.

Functional Description

Referring to Illustration 5Ċ10, the LOG Assy Block Diagram, the Log Assy can be divided into two functional
blocks:

a. Image Function Generator Section;
b. Test Signal Section.

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5-4-6 Logarithmic Amplifier (LOG) Assy (continued)

1. Image Function Generator Section: The incoming echo signal is:

a. Dynamically filtered to compensate for any shifts in center frequency;
b. Sidelobe canselled to minimize image artifacts;
c. Log compressed to equalize weak far field and strong near field echoes;
d. Detected, or rectified;
e. Assigned a dynamic range;
f. Processed by a brightness compensatorto boost relatively weak far field echoes. SGC, or

Side Gain Control signal controls gain on either side of the image. TGC, or Time Gain ComĆ

pensation signal, increases echo gain as a function of depth;
g. Voltage limited to make it compatible with subsequent stages;
h. AntiĊalias filtered to enhance the image.

2. Test Signal Section: This section can generate a 10 mV or 100 mV test echo signal, as well as apply
power from the HV Assy for self diagnostic power voltage checks.

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5-4-6 Logarithmic Amplifier (LOG) Assy (continued)

LOGARITHMIC AMPLIFIER (LOG) BLOCK DIAGRAM

ILLUSTRATION 5-10

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5-4-7 Color Scan Converter Controller (CSCC) Assy (A17)

Function : Using frame memory RAMs, this card converts digitized echo data to pixels that

form a BĊmode sector representing the final video image. The CSCC Assy pro
cesses BĊmode echo signals only. MĊmode and dopplermode signals are pro
cessed by the FM3 Assy.

Controlled By : MST, IOP and CVDO assemblies.

Inputs Come From : CVDO, MST and IOP assemblies.

Outputs Sent To : CVDO, MST and CBFM assemblies

Functional Description

The CSCC receives a 6-bitdigitized grayscale echo data word from the CVDO Assy. The scan converted
output of the CSCC Assy is returned to the CVDO Assy for digital to analog conversion and summing with
whitescale physiological and/or software displays. Referring to Illustration 5Ċ11, the Color Scan Converter
Controller Assy Block Diagram, this PC Board can be divided into seven functional blocks:

a. BĊMode Line Buffer section;
b. BĊMode Line Buffer Address Generator section;
c. Frame Averaging RAM section;
d. Frame Memory section;
e. Frame Memory Write Address Generator section;
f. Frame Memory Read Address Generator section;
g. Frame Memory Write Enable & Control section;
h. USC Register; CPU Register Control section.

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5-4-7 Color Scan Converter Controller (CSCC) Assy (A17) (continued)

CSCC ASSY BLOCK DIAGRAM

ILLUSTRATION 5-11(a)

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5-4-7 Color Scan Converter Controller (CSCC) Assy (A17) (continued)

CSCC ASSY BLOCK DIAGRAM (continued)

ILLUSTRATION 5-11(b)

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5-4-7 Color Scan Converter Controller (CSCC) Assy (A17) (continued)

BĊMode Line Buffer Section

This buffer Iinearly interpolates echo data to fill in the missing pixels in the lower, wider portion of the pie
shaped BĊ mode sector image.

B Line Buffer Address Generator Section

Write addresses are supplied by the LBWRADD bus from the CVDO Assy. For the SHOWA, TAISHO, MEIZl
and KEIO line buffers, read addresses come from the R bus, which is generated by the VECROM (Vector
ROM).

Frame Averaging RAMs

RAM ICs U 1B and U2B contain a frame averaging lookup table, or LUT. To produce an averaged echo word,
it averages Six bits of new data (BLB OUT from the line buffers) with Six bits of old data (BFM OUT) stored in
frame memory.

1. Strong echoes above a selectable voltage threshold are not averaged. Thus, frame averaging lowers
the noise level by averaging normal signal levels without affecting strong echoes.

2. The echo signal voltage threshold is defined by the CPU ADR bus from the MST Assy. The averaged
data in the addressed lookup table is sent to the Frame Memory over the Six bit BFM IN bus.

BĊMode Frame Memory (BFM) Section

This section contains 512 bit x 128 bit x 6 bit RAMs. These RAMs store the echo data as pixels for the final
video output. The RAMs receive BFM IN, the frame averaged, six bit grayscale BĊmode echo word that
defines one pixel: it must be assigned to a particular xĊyĊz frame memory address in six planes of
memory.

1. The 512 bit RAM dimension corresponds to theY axis on the TV monitor. The 128 bit dimension correĆ
sponds to the X axis. The 6 bit deep RAM planes correspond to the Z (pixel intensity) axis, which is
automatically defined by the xĊy axis address. The binary value of the BFM IN word defines one of
64 shades of grayscale.

2. Each of the six BFM IN bus bits is sent to its assigned RAM plane at the same relative xĊy matrix locaĆ
tion. Thus, one grayscale pixel is formed when the data is written out serially and D/A converted to a
pixel in the CVDO Assy.

BĊMode Frame Memory Write Address Generator SectIon

This section supplies x and y axis write addresses to the frame memory RAMs. The data transfer rate is 85
nsec. The write addresses are stored as Iookup tables in the Vector ROMs (VECROMs) shown in block diaĆ
gram Illustration 5Ċ11. VECROM Iookup tables are updated once per scanline by addresses on the ScanĆ
line (SLN) bus.

Frame Memory Write Control Circuit

The BĊMode Frame Memory Write Enable (BFMWE) signal is controlled by several signals decoded by
BFM write control. Condition signals 1,2, 2C, 3 and 3C must be high to enable writing. These signals monitor
the status of the SLN bus, R bus, and other important system operation indicators. BFRZ, SYSFRZ, and
OVR/MINUS high signals disable writing. (BFRZ and SYSFRZ signals freeze the image. OVR/MINUS high
signal indicates an overflow in the X axis write address.) SYSRST/ low presets a type D flipĊflop to enable
BFMWE output.

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5-4-7 Color Scan Converter Controller (CSCC) Assy (A1 7) (continued)

Frame Memory Read Addressing

Normally, the XRDADD bus supplies the X axis read address; the YRDADD bus supplies the Y axis read
address. However, a 18 bit xĊy axis read address from the MST CPU can be enabled for test purposes
when CPU RD/WR/ signal is low.

USC Register; CPU Register Control Section

The bits 0Ċ6 of the UD (Ultrasound Data) bus are latched through DĊregister U24L, U26K to produce the
SLN (Scan- line) bus by UA signal and SLNWE signal. (This is derived from the output of PALs U25L, which
is addressed by the Ultrasound Address (UA) bus.) Ultrasound Freeze (UFR) is latched out of register U27K.
It is ORed with VFRZ from the CPU DATA bus to produce SYSFRZ when either is true. SYSFRZ freezes the
image.

Color BĊMode Frame Memory (CBFM) Sub Assy (A17)

Function : This PC Board contains RAMs for scan converting digitized velocity data and tur

bulence data for color BĊMode data. It also contains the line buffers required for
velocity and turbulence data storage and out.

Controlled By : CSCC assembly.

Input Come From : CSCC assembly.

Output Sent To : CSCC assembly.

CBFM ASSY BLOCK DIAGRAM

ILLUSTRATION 5-12

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5-4-8 Frame Memory 3 (FM3) Assy

Function : This PC Board contains RAMS for storing digitized echo data in the MĊMode and

doppler format. It also contains the line buffers and address generators required
forMĊMode and doppler data storage and output. This board also processes
the color MĊMode and color dopplerwith inputs from the CFMP1 and CFMP2
Boards.

Controlled By : MST and IOP Assemblies.

Inputs Come From : CVDO, MST and IOP Assemblies.

Outputs Sent T o : CVDO Assy.

Functional Description:

Referring to Illustration 5Ċ13, the Frame Memory 3 Assy Block Diagram, this PC Board can be divided into
five functional blocks:

a. Peak Hold section;
b. Line Buffer section;
c. Line Buffer Address Generator section;
d. Frame Memory section;
e. FM Address Generator section.

1. Peak Hold Section: This section compares signal amplitude of the latest and previous digitized
MĊMode doppler data words, and stores the peak sample. This prevents blurring of a fast moving
object such as a heart valve during dual channel MĊMode or doppler operation.

2. Line Buffer Section: This section has two sets of line buffers for echo data, which is digitized by an ND
converter on the CVDO Assy and sent over on the PL OUT bus. Doppler data, which comes from the
FFT Assy, is app!ied directly to the frame memory.

3. Line Buffer Address Generator Section: This section generates the read and write addresses for the
Line Buffer section, synching their output to its internal 25 MHz clock.

4. Frame Memory Section: This section receives and stores MĊMode data and Doppler data from the
optional FFT Assy. The 64Kx6bitMFMRAMisdivided into two channels. One channel loads data
while the other channel sends data to the CVDO card, and viceĊversa.

5. FM Address Generator Section: in conjunction with the MST CPU, this section generates the MFM read
and write addresses. It is controlled by the MST Assy and the MĊMode Line Buffer Address Generator
section.

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