AEA Technology Liberator Series User manual

Operation Manual

Liberator Series

Bravo MRI 3000 Analyzer

Testing Made Simple!

_ Technology, Inc.

Proprietary Information

Reproduction, dissemination, or use of information contained herein for purposes other than

operation and/or maintenance is prohibited without the written authorization from AEA Technology,

Inc.

without the written consent from AEA Technology, Inc.

The AEA Logos are trademarks of AEA Technology, Inc.

Acknowledgements:

Windows 7, Windows 10, and Power Point are registered trademarks of Microsoft Corp. WD-40 is

a registered trademark of WD-40 Company

409 cleaner is a registered trademark of Clorox Corporation

6055-3020 October, 2021

WARNING

DC Port and A/C Adapter

Connecting and Operating the Analyzer while using the A/C or D/C adapters can create external

sparks during connection. Connecting or use of these power sources in an explosive atmosphere is

dangerous and should never be attempted. Always connect the MRI-3000 away from any explosive

atmosphere. Use ONLY internal battery power if the presence of explosive fumes is a potential

hazard.

Coax Test Ports

Thepresenceofanyvoltage,fromanappliedsourceorstaticbuild-uponcablesor antennas, particularly

vacant cables with no terminations or grounding, can cause an ignitionsparkwhentheyareconnected

tothe MRI Analyzer. Cautionshouldbetakento ensurecablesarefreeofanyvoltagesorstaticcharge

priortoconnectingtheinstrumentin a potentially explosiveatmosphere.

Operating Precautions

Although the Bravo MRI 3000 is a rugged instrument, care should be taken to avoid exposing it to

excessive external RF or a Magnetic Field. Do not connect the Bravo MRI to an active transmitter.

The Bravo MRI Should Not be allowed to get closer than 3 feet (1 meter) with a 1.5T Coil, and 5 feet

(1.5 meter) with a 3T Coil

The MRI Analyzer, when in its Belt Case, is splash resistant and designed to work for relatively long

periods in rain depending on intensity. It is not designed to be immersed in water. See Cleaning

Instructions in the appendix.

The Test Port is limited to +15dBm input power. Power exceeding this level could damage sensitive

input components.

Batteries

Due to the strong magnetic fields involved with MRI servicing, the use of batteries is not

recommended. Both the Bravo MRI unit and the MRI unit under test could be more susceptible to

damage if batteries were installed. for convenience we provide a 20 ft long DC extension cord to use

with the Ac adapter plug, if you must use batteries follow operating precautions instruction and keep

the analyzer a min of 3 feet (1 meter) away from the magnet

When batteries are required you can use Alkaline, NI-MH, LiION "AA" Batteries in the MRI Analyzer,

but when installed go to the Battery Menu and change the Battery Type to ALKALINE, Rechargeable

or NON.

Please note rechargeable batteries can't be charged inside the unit.

Cleaning

Under ordinary operating conditions, it should only be necessary to occasionally wipe the VIA Bravo

MRI with a soft, water moistened cloth. Avoid using solvents which may attack the plastic.

iii

Battery Precautions

Failure to carefully observe the following procedures and precautions can result in leakage of battery

fluid (electrolyte), heat generation, bursting, fire and serious personal injury.

Never dispose of batteries in a fire or heat them. Doing so may cause them to burst.

Do not connect the + (positive) and - (negative) terminals of batteries together with electrically

conductive materials, including lead wires.

Never disassemble batteries.

The + (positive) and - (negative) terminals of batteries are predetermined, observe polarity.

WARNING

1. Keep batteries or the equipment out of the reach of infants and small children.

2. Do not use batteries if the outer tube/label is scratched or damaged.

CAUTION

1. Do not use old and new batteries mixed together, or batteries at different charge levels. Do not

use Ni-MH batteries mixed together with a dry cell or other battery of a different capacity, type, or

brand name.

2. After they have been removed from equipment, store batteries in a dry place and within the

recommended storage temperature range.

Electrostatic Discharge (ESD) Precautions

The SWR Analyzer was constructed in an ESD protected environment. This is because most of the

semiconductor devices used in this instrument are susceptible to damage by static discharge.

Static charges are generated in numerous ways, such as simple contact, separation of materials, and

normal motions of persons working with the SWR Analyzer. To prevent instrument damage, practice

industry accepted techniques for handling static sensitive devices when using the SWR Analyzer. Very

often, coaxial cables and antennas also build up a static charge, which, if allowed to discharge by

connecting to the SWR Analyzer, may damage the instrument input circuitry. To avoid such damage, it is

recommended to dissipate any static charges by temporarily attaching a short to the cable or antenna

prior to attaching to the instrument.

If this instrument does become subject to ESD, be advised that the instrument may reset itself in this

event, and re-entry of the sweep parameters may be necessary.

The MRI Analyzer is designed to be safely operated in normal testing environments. Instrumentisnottobe

usedincriticalapplicationswherefailureof the instrument or inaccuracies in data might cause personal

injury or property damage. Use in such applications is not recommended

If you have any questions concerning the use of the MRI Analyzer or other AEA Technology, Inc.

instruments please contact us at:

Tel: 1-800-258-7805 or +1-760-931-8979 or Email: techsupport@aeatechnology.com

MRI-3000 Literature Introduction

There are two literature items available for the MRI Analyzer:

Quick Start Guide is a laminated tri-fold held in the Belt Case’s inside pocket. This provides a light-

weight condensed guide to calibration, measurement functions and menus

Operator Manual instructional guide which has three purposes:

1. Gives a concise description of the instrument, keypad, menus and measurement

screens.

2. Provides user instructions in more detail than the Quick Start Guide including a section on

Measurement Information and Helpful Tips.

3. Provides specifications, troubleshooting guides, and accessories lists.

Both these items are available on line or the enclosed CD in PDF format ready for printing.

NOTES:

1.In addition to digital files of this literature the enclosed CD also contains MRI Analyzer PC

Vision™ software and a training Power Point presentation.

2.All these items and technical support is also available on our website: www.aeatechnology.com

Table of Contents

Proprietary Information.......................................................................................................................................... i

WARNING .............................................................................................................................................................. ii

DC Port and A/C Adapter................................................................................................................................ ii

Coax Test Ports............................................................................................................................................... ii

Operating Precautions..................................................................................................................................... ii

Batteries .......................................................................................................................................................... ii

Cleaning .......................................................................................................................................................... ii

Battery Precautions........................................................................................................................................ iii

Electrostatic Discharge (ESD) Precautions.................................................................................................... iii

MRI-3000 Literature Introduction ......................................................................................................................... iv

NOTES:.................................................................................................................................................. iv

MRI Analyzer Description ...................................................................................................................................... 1

General............................................................................................................................................................1

Instrument Front Panel Layout

............................................................................................................................ 2

Screen Layouts................................................................................................................................................2

General....................................................................................................................................................2

VNA Wide Format....................................................................................................................................2

VNA Narrow Format ................................................................................................................................4

SWR/RL Wide Format.............................................................................................................................4

SWR/RL Narrow Format..........................................................................................................................5

S21 Screen format...................................................................................................................................6

Keypad Operations

............................................................................................................................................... 6

Power ON/OFF

..............................................................................................................................................6

POWER ON.............................................................................................................................................6

NORMAL POWER DOWN......................................................................................................................6

HARD POWER DOWN ...........................................................................................................................7

Soft Reset........................................................................................................................................................7

Menu Keys

........................................................................................................................................................7

Function Keys

....................................................................................................................................................7

Help Key..................................................................................................................................................7

SWR/RL...................................................................................................................................................7

VNA Key..................................................................................................................................................7

FREQ Key ...............................................................................................................................................8

SCALE Key..............................................................................................................................................8

SWEEP/CW Key .....................................................................................................................................8

Menus

................................................................................................................................................................... 11

Menu Navigation............................................................................................................................................11

Meter Menu ...................................................................................................................................................11

BACKLIGHT..........................................................................................................................................11

COLOR SCHEME .................................................................................................................................11

KEYPAD BEEP .....................................................................................................................................12

BATTERY MENU ..................................................................................................................................12

DATE/TIME ...........................................................................................................................................12

Mode Menu....................................................................................................................................................13

On a two-port MRI-3000, you will see this screen:................................................................................13

. 13

VNA MODE (Dual Port Models Only)....................................................................................................14

CALIBRATIONS....................................................................................................................................14

BROADBAND CAL................................................................................................................................14

SWEEP ENABLE ..................................................................................................................................14

GRAPH SELECT...................................................................................................................................14

GRID LINES..........................................................................................................................................14

MORE OPTIONS...................................................................................................................................15

OTHER OPTIONS Menu...............................................................................................................................15

RLC MODEL..........................................................................................................................................15

SYSTEM Z0...........................................................................................................................................15

RE-ENABLE SWEEP............................................................................................................................15

MEMORY OPERATIONS..............................................................................................................................15

DATA SAVE ..........................................................................................................................................15

DATA RECALL.....................................................................................................................................16

SAVE SETTINGS..................................................................................................................................16

RECALL SETTINGS..............................................................................................................................16

Measurement and Support Screens ..................................................................................................................... 16

General Information.......................................................................................................................................16

Measurement Screens ..................................................................................................................................17

SWR Screen..........................................................................................................................................17

Return Loss Screen...............................................................................................................................18

CW –Continuous Wave Screen............................................................................................................18

Cable Null Screens................................................................................................................................18

Calibration Sequence Screens..............................................................................................................19

MRI-3000 VNA Measurements ............................................................................................................................ 19

General Information.......................................................................................................................................19

S11 VNA SCREEN................................................................................................................................19

S21 VNA Screen (Two-Port Model only)...............................................................................................20

Calibration, Measurement Information and Helpful Tips ..................................................................................... 20

Calibration Processes....................................................................................................................................20

Broadband Calibration Process.............................................................................................................21

Frequency Specific Calibration Process................................................................................................21

SWR (Standing Wave Ratio a.k.a. Voltage Standing Wave Ratio-VSWR)...................................................23

Return Loss...................................................................................................................................................23

SWR and Return Loss Measurement Steps..................................................................................................24

MRI PC Vision™.................................................................................................................................................... 25

Abstract .........................................................................................................................................................25

Installing MRI PC Vision................................................................................................................................25

Running MRI PC Vision.................................................................................................................................25

Display Screen ......................................................................................................................................27

S11 Single-Port Operation.....................................................................................................................28

Graphs in Detail.....................................................................................................................................30

Z-Plot.....................................................................................................................................................31

Smith Chart............................................................................................................................................31

vii

Limit Lines .............................................................................................................................................32

S21 Operation (Two-port units only).....................................................................................................33

Naming Your Chart................................................................................................................................33

Saving Traces........................................................................................................................................34

Check Connection.................................................................................................................................34

Instrument File Management.................................................................................................................35

Warranty, Maintenance, and Troubleshooting Guides ........................................................................................ 37

Limited Warranty ...........................................................................................................................................37

Maintenance..................................................................................................................................................37

Battery Replacement Instructions..................................................................................................................37

Cleaning ........................................................................................................................................................38

Instrument Troubleshooting Guide................................................................................................................39

Factory Reset................................................................................................................................................39

Used to recover any program faults and then restores the factory defaults..................................................39

Appendix A .......................................................................................................................................................... 40

Specifications ................................................................................................................................................40

Appendix B .......................................................................................................................................................... 41

MRI Analyzer Model and Accessories...........................................................................................................41

Included items Part Number.........................................................41

MRI Analyzer Description

General

The MRI-3000 analyzer measures complex impedances of electrical components. In

particular, its design has been focused on making these measurements on the circuitry used in

MRI machines. The results of the measurements are displayed graphically, with some numeric

detail. You may choose to display the impedance from among several formats. The MRI-3000

sweeps across a range of frequencies, or operates at CW, either way the display is continuously

updated with new measurement results. This unit has many applications, including, but not

limited to:

1. Tune/align MRI coils (transmit and receive)

2. Measure Z, Phase Angle, Resistance, and/or Reactance of a load

3. Portable and economic replacement for network analyzer applications that measure S11.

4. Find resonant frequency and response curve

5. CW signal generator

6. Two plots may be simultaneously viewed on the same graph.

The MRI-3000 communicates with your PC via the MRI PC Vision™ application software allowing the

user to remotely control the instrument or view results on the PC's much larger display, in either X-Y or

Smith Chart plot format. The impedance altering effects of coax cable can be nulled out, so that the

load at the end of the coax is displayed. The MRI-3000 operates over a wide range of characteristic

impedances, so you are not limited to measuring 50 ohm systems.

Operator conveniences include: Non volatile storage, back lit display, display brightness adjustment,

versatile output displays, and USB port communications. Internal Batteries (8 AA batteries, not

included) power the MRI-3000 in situations where wall power is not available.

Instrument Front Panel Layout

Single Port Model Dual Port Model

Instrument Top Panel Layout

Screen Layouts

General

The MRI-3000 has two operating modes, VNA and SWR/RL. Each single-port mode has two

possible screen layouts, Wide and Narrow. Dual port mode (S21) is displayed in Wide only. This

gives a total of five possible screen layouts, which will be described here.

The MRI-3000's measurement screens are divided into two sections: The chart or graph section, and

the sidebar section. The Graph section is where the instruments measurements are graphically

represented by plots on a chart. This graph will display a different number of points depending on the

width selected. The sidebar section to the left of the chart, numerically indicates measurements at

center frequency. The size and content displayed also varies depending on the graph size selected.

The sidebar indications ALWAYS represent their respective measurements at center frequency (f0).

VNA Wide Format

Shown above is the VNA mode screen, in wide chart format. Features of interest are as follows:

Left & Right Scale indicators: These labels, in the upper corners of the chart area, indicate which

measurement that scale is for, and, more importantly, which trace is using that scale. The color of the

frame drawn around the label is always the same color as the trace using that scale.

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