Anritsu ME7840A User Manual

MODEL

ME7840A

POWER AMPLIFIER TEST SYSTEM

OPERATION AND

MAINTENANCE MANUAL

490 JARVIS DRIVE - MORGAN HILL, CA 95037-2809

P/N: 10410-00225

REVISION: A

PRINTED: JUNE 2000

WARRANTY

The ANRITSU product(s) listed on the title page is (are) warranted against defects in materials and workmanship for three years from the date of shipment.

ANRITSU’s obligation covers repairing or replacing products which prove to be defective during the warranty period. Buyers shall prepay transportation charges for equipment returned to ANRITSU for warranty repairs. Obligation is limited to the original purchaser. ANRITSU is not liable for consequential damages.

LIMITATION OF WARRANTY

The foregoing warranty does not apply to ANRITSU connectors that have failed due to normal wear. Also, the warranty does not apply to defects resulting from improper or inadequate maintenance by the Buyer, unauthorized modification or misuse, or operation outside of the environmental specifications of the product. No other warranty is expressed or implied, and the remedies provided herein are the Buyer’s sole and exclusive remedies.

TRADEMARK ACKNOWLEDGEMENTS

V Connector and K Connector are registered trademarks of ANRITSU Company. GPC-7 is a registered trademark of Amphenol Corporation. Ink Jet and Think Jet are registered trademarks of Hewlett-Packard Co. MS-DOS is a registered trademark of Microsoft Corporation.

NOTICE

ANRITSU Company has prepared this manual for use by ANRITSU Company personnel and customers as a guide for the proper installation, operation and maintenance of ANRITSU Company equipment and computer programs. The drawings, specifications, and information contained herein are the property of ANRITSU Company, and any unauthorized use or disclosure of these drawings, specifications, and information is prohibited; they shall not be reproduced, copied, or used in whole or in part as the basis for manufacture or sale of the equipment or software programs without the prior written consent of ANRITSU Company.

Safety Symbols

To prevent the risk of personal injury or loss related to equipment malfunction, ANRITSU Company uses the following symbols to indicate safety-related information. For your own safety, please read the informa tion carefully BEFORE operating the equipment.

Symbols used in manuals

DANGER

This indicates a very dangerous procedure that could result in serious injury or death if not performed properly.

WARNING This indicates a hazardous procedure that could result in serious in

jury or death if not performed properly.

CAUTION This indicates a hazardous procedure or danger that could result in

light-to-severe injury, or loss related to equipment malfunction, if proper precautions are not taken.

Safety Symbols Used on Equipment and in Manuals

(Some or all of the following five symbols may or may not be used on all ANRITSU equipment. In addition, there may be other labels attached to products that are not shown in the diagrams in this manual.)

The following safety symbols are used inside or on the equipment near operation locations to provide infor mation about safety items and operation precautions. Ensure that you clearly understand the meanings of the symbols and take the necessary precautions BEFORE operating the equipment.

This indicates a prohibited operation. The prohibited operation is indi cated symbolically in or near the barred circle.

This indicates a compulsory safety precaution. The required operation is indicated symbolically in or near the circle.

This indicates warning or caution. The contents are indicated symboli cally in or near the triangle.

This indicates a note. The contents are described in the box.

These indicate that the marked part should be recycled.

ME7840A OMM Safety 1

For Safety

WARNING

Always refer to the operation manual when working near locations at which the alert mark, shown on the left, is attached. If the operation, etc., is performed without heeding the advice in the operation manual, there is a risk of personal injury. In addition, the equipment perfor mance may be reduced. Moreover, this alert mark is sometimes used with other marks and de scriptions indicating other dangers.

WARNING

When supplying power to this equipment, connect the accessory 3-pin power cord to a 3-pin grounded power outlet. If a grounded 3-pin outlet is not available, use a conversion adapter and ground the green wire, or connect the frame ground on the rear panel of the equipment to ground. If power is supplied without grounding the equipment, there is a risk of receiving a severe or fatal electric shock.

Repair

WARNING

This equipment can not be repaired by the operator. DO NOT attempt to remove the equipment covers or to disassemble internal components. Only qualified service technicians with a knowledge of electrical fire and shock hazards should service this equipment. There are high-voltage parts in this equipment presenting a risk of severe injury or fatal electric shock to untrained personnel. In addition, there is a risk of damage to precision components.

WARNING

Use two or more people to lift and move this equipment, or use an equipment cart. There is a risk of back injury, if this equipment is lifted by one person.

Safety 1 ME7840A OMM

Chapter 1 General Information

SCOPE OF THIS MANUAL...............................1-1

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

RELATED MANUALS .................................1-1

CONVENTIONS.....................................1-2

SERIAL NUMBER ...................................1-2

ONLINE MANUALS ..................................1-2

PATS SYSTEM OVERVIEW ..............................1-2

HARDWARE DESCRIPTION..............................1-2

SYSTEM DESCRIPTION ................................1-5

DRA Scorpion ....................................1-5

MS4782X Test Set .................................1-6

Connectors and Ports ................................1-7

K FACTOR........................................1-9

ADAPTIVE P STOP ...................................1-9

SOFTWARE DESCRIPTION ..............................1-9

TEST EXECUTIVE ...................................1-9

SOFTWARE STRUCTURE ..............................1-11

MS7840A OPTIONS ..................................1-12

OPTIONAL ACCESSORIES..............................1-12

PREVENTIVE MAINTENANCE ...........................1-13

USER SUPPLED TEST SET .............................1-13

PERFORMANCE SPECIFICATIONS.........................1-13

RECOMMENDED ITEMS...............................1-15

USER SUPPLIED ITEMS ...............................1-15

Chapter 2 Installation

INTRODUCTION ....................................2-1

EQUIPMENT COMPLEMENT .............................2-1

UNPACKING and INSPECTION............................2-1

INSTALLATION - HARDWARE ............................2-2

INSTALLATION - SOFTWARE.............................2-7

ME7840A OMM i

Installation .....................................2-7

What else is on the CD?...............................2-7

Uninstalling the software..............................2-7

SERVICE CENTERS ..................................2-8

Chapter 3 Operations, General

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

PREPARING THE SYSTEM ..............................3-1

Unused Connections ................................3-2

USING PATS SOFTWARE ...............................3-4

Software

Organization.....................................3-4

COLLATERALFUNCTIONS ..............................3-5

File..........................................3-5

Help .........................................3-6

Tools .........................................3-7

Chapter 4 Operations, Calibration

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

OPERATION, GENERAL ................................4-1

PROGRAM FILES....................................4-1

TEST EQUIPMENT...................................4-2

GENERAL ........................................4-3

POWER LEVEL .....................................4-4

HOTS22.........................................4-8

S-PARAMETERS CAL .................................4-11

CAL FILE SETUP ...................................4-15

Chapter 5 Operations, Measurement

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

OPERATION, GENERAL ................................5-1

MEASUREMENT CALIBRATION ...........................5-1

GENERAL ........................................5-1

Calibration(s) Completed ..............................5-1

Calibration(s) Not Completed ...........................5-2

S-PARAMETER TESTS: S

S-PARAMETER TEST: K FACTOR...........................5-7

POWER SWEEP, TWO TONE.............................5-10

Single Frequency Power Sweep ..........................5-10

Multiple Frequency Power Sweep.........................5-14

21,S11,S22,S12

,ALL.....................5-4

ii ME 7840A OMM

Gain and IMD Power Sweep ...........................5-18

POWER SWEEP, ONE TONE .............................5-22

Single Frequency Power Sweep ..........................5-22

IMD...........................................5-26

HARMONICS .....................................5-29

HOTS22........................................5-32

Chapter 6 Performance Verification Procedure

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

CONVENTIONS.....................................6-1

TEST

EQUIPMENT ......................................6-1

SOURCE OUTPUT ACCURACY ............................6-2

Setup: ........................................6-2

Test Procedure ...................................6-2

RETURN LOSS CONFIDENCE TEST.........................6-3

Setup.........................................6-3

Test Procedure: ...................................6-4

SYSTEM DYNAMIC RANGE .............................6-6

Test Procedure: ...................................6-6

RECEIVER DISPLAY LINEARITY ..........................6-8

Setup: ........................................6-8

Chapter 7 Preamplifier Operations

INTRODUCTION ....................................7-1

USE OF EXTERNAL PREAMPLIFIERS........................7-1

Alternative 1 ....................................7-1

Alternative 2 ....................................7-1

Appendix A Calibration Specification Files

INTRODUCTION ....................................A-1

FILE TYPES.......................................A-1

OPEN FILES ......................................A-1

TECHNICAL DETAILS.................................A-1

POWER LEVE.TXT ..................................A-11

CAL FILES SETUP.TXT................................A-11

HOT S

.TXT ......................................A-13

S-PARAMETERS. TXT ................................A-14

ME7840A OMM iii/iv

Figure 1-1. Model ME7840A Power Amplifier Test System (PATS)

Chapter 1 General Information

1-1 SCOPE OF THIS

MANUAL

This manual provides operating and maintenance information for the ME7840A Power Amplifier Test System (PATS, Figure 1-1). The follow ing topics are discussed:

Equipment Description

Equipment Installation and Connection

Software Description

Software Installation

Calibration

System Operation

Test Procedures and Test Results Interpretation

System Performance Verification

The procedures described in this manual presume a working knowledge of vector network analyzers and RF power amplifier testing procedures. Refer to the other manuals supplied with the ME7840A (see below) for more detailed explanations of the system equipment and procedures.

1-2 INTRODUCTION This chapter provides information to familiarize the user with the basic

ME7840A Power Amplifier Test System. Included is information about re lated manuals, and the available models and options.

1-3 RELATED

MANUALS

The ME7840A manual set consists of the following manuals: The operat ing and programming manuals are supplied with the equipment; the maintenance manuals are optional items that may be purchased.

Manual Description ANRITSU Part Number

ME7840A Operating & Maintenance Manual (OMM)

MS462XX Operating Manual (OM) 10410-00203 MS462XX Programming Manual (PM) 10410-00204 MS462XX Maintenance Manual (MM) 10410-00205 (Optional) MS4782X Test Set Maintenance Manual (MM) 10410-00218 (Optional))

10410-00225

ME7840A OMM 1-1

CONVENTIONS GENERAL INFORMATION

1-4 CONVENTIONS Throughout this manual, the ME7840A Power Amplifier System may be

referenced as PATS or ME7840A; the MS462XC may be referenced as Scorpion or MS462XC; and the MS4782X Test Set may be referenced as Test Set or MS4782X.

1-5 SERIAL NUMBER All ANRITSU instruments are assigned a unique six-digit serial number,

such as “940101.” This number is affixed to a decal on the rear panel of each unit. In any correspondence with ANRITSU Customer Service, please use this number.

1-6 ONLINE MANUALS This manual is available on CD ROM as an Adobe Acrobat™ (*.pdf) file.

The file can be viewed using Acrobat Reader™, a free program that is also available on the CD ROM. This file is “linked” such that the viewer can choose a topic to view from the displayed “bookmark” list and “jump” to the manual page on which the topic resides. The text can also be word-searched. CD ROM part numbers are available on ANRITSU’s Internet home page (http://www.global.anritsu.com/ library/). You can also contact ANRITSU Customer Service for price and availability.

1-7 PATS SYSTEM

OVERVIEW

1-8 HARDWARE

DESCRIPTION

The ANRITSU ME7870A Power Amplifier Test System (PATS) is intended for the measurement and real-time graphical display of the following parameters of a power amplifier in the frequency range of 10 MHz to 6 GHz:

S-Parameters including Hot S

K Factor

Gain Compression and Phase Distortion

Intermodulation Distortion

Harmonics

Drain Current and Power Added Efficiency (PAE)

PATS is designed to facilitate alignment, tuning and pass/fail testing of the components, modules and subassemblies of a power amplifier as well as the completed amplifier.

The ME7840A hardware (Figure 1-1) consists of a MS462XC, Direct Re ceiver Access (DRA) Scorpion, a MS4782X Test Set, a customer supplied Personal Computer (PC), and an optional current probe (refer to Chapter 2, Figure 2-4 ). The MS462XC is available in two frequency ranges: 10 MHz to 3 GHz or 10 MHz to 6 GHz.

The Test Set is available in two configurations, as described in Table 1-1 The MS4782D is standard, and the MS4782A is Option 2. A block dia gram of the PATS is shown in Figure 1-2 and the Option 2 system in Fig ure 1-3.

1-2 ME 7840A OMM

GENERAL INFORMATION HARDWARE DESCRIPTION

SOURCE 2 SOURCE 1

MS4782D Test Set

ACCESS

SCORPION

DIRECT RECEIVER

OPTIONAL EXTERNAL

PREAMPLIFIERS

ATTENUATORS 70dB, 10dB/step

RF3

COMBINER

-30dB

STEP

RF1

REVERSE

FORWAR

TRANSFER SWITCH

GPIB

ANALOG IN

SYSTEM

CONTROLLER

(PC)

GPIB

RECEIVERS

EXT I/O

KKKN

LIMITER

STEP

ATTENUATOR

70dB, 10dB/step

KKN

RF2

-30dB

CONTROL LINES

EXTERNAL

100 W

TERMINATION

CIRCULATOR

OPTIONAL

SPECTRUM

ANALYZER

OPTIONAL

MODULATION

SYNTHESIZER

OPTIONAL

EXTERNAL

PRE-AMP

-30dB

AUT

POWER

METER

POWER SUPPLY

CURRENT PROBE

Indicates coaxjumper in the as-shipped configuration

Figure 1-2. Overall Functional Block Diagram of the Basic Power Amplifier Test System (PATS) with MS4782D Test Set

ME7840A OMM 1-3

HARDWARE DESCRIPTION GENERAL INFORMATION

SOURCE 2 SOURCE 1

ACCESS

SCORPION

DIRECT RECEIVER

OPTIONAL EXTERNAL

PREAMPLIFIERS

ATTENUATORS 70dB, 10dB/step

RF3

COMBINER

STEP

RF1

REVERSE

FORWAR

TRANSFER SWITCH

GPIB

ANALOG IN

SYSTEM

CONTROLLER

(PC)

GPIB

RECEIVERS

EXT I/O

KKKN

KKN

RF2

CONTROL LINES

-30dB

LIMITER

POW

OPTIONAL

SPECTRUM

ANALYZER

POWER

METER

POWER SUPPLY

MS478A Test Set

OPTIONAL

MODULATION

SYNTHESIZER

OPTIONAL

EXTERNAL

PRE-AMP

HIGH

STEP

ATTENUATOR

-30dB

70dB, 10dB/step

-30dB

TERMINATION

AUT

CURRENT PROBE

Indicates coaxjumper in the as-shipped configuration

Figure 1-3. Overall Functional Block Diagram of the Option 2 Power Amplifier Test System (PATS) with MS4782A Test Set

1-4 ME 7840A OMM

GENERAL INFORMATION SYSTEM DESCRIPTION

Table 1-1. Test Set Configurations

Model

MS4782A 800 to 1000 50 Yes Internal MS4782D 800 to 2400

Notes:

1. This frequency range does not account for any restricting effects caused by use of external circulator.

2. This Max AUT power assumes a minimum isolation of 23 dB provided by external circulator(s). Two circulators may have to be used to provide the required isolation.

Frequency Range

(MHz)

(Note 1)

1-9 SYSTEM

DESCRIPTION

Max AUT Power Output

(Watts)

100 (Note 2)

Reverse Measurements

, Hot S22,S12Possible)

Yes External

(at AUT Output Path)

Circulator

Brief descriptions of the DRA Scorpion (MS462XC) and MS4782X Test Set are given below.

DRA Scorpion The Scorpion Direct Receiver Access (DRA) version Vector Network Mea-

surement System (VNMS) (Figure 1-2) functions under control of the software residing in the PC through GPIB commands. The software supports tuning and alignment operations by generating real time graphic displays of the measured data on the PC screen.

Under software control, 3

rd,5th

and 7thorder IMD products can be measured and displayed. Also, the Upper and Lower Side Band (USB & LSB) components of the IMD products are measured and displayed separately.

The DRA Scorpion includes the following capabilities:

Two internal, independent RF sources. Each source has a range of –15 dBm to +10 dBm. A 0dB to 70dB step attenuator (10 dB / step) is provided for each source resulting in a Power Output range of –85 dBm to +10 dBm from each source.

NOTE

After test set losses, the maximum net power at the input of the amplifier under test (AUT) is +5 dBm.

Complete built-in capability for IMD measurements. A combiner is provided in the Test Set.

Internal Transfer Switch enabling S22and Hot S22measurements. The reflectometer set-up is provided in the Test Set.

Direct access to each of the four receiver channels (two reference channels and two test channels) for maximum flexibility in measur ing forward and reverse S-parameters over a wide range of AUT output power.The Test Set provides incident and reflected signal separation.

ME7840A OMM 1-5

SYSTEM DESCRIPTION GENERAL INFORMATION

MS4782X Test Set The Series MS4782X Test Set contains a Wilkinson type combiner that

combines the two RF signals from Ports 1 and 3 (RF1 & RF3) of the Scor pion. External preamplifiers can optionally be provided at the combiner input to boost the input RF power to the amplifier-under- test (AUT). The combiner has power input rating of 30-Watts maximum when terminated with a VSWR of 1.2:1. For an open or short at the combiner output, the combiner input power rating is 0.5 Watts maximum.

The output of the combiner is fed to a source selection switch that enables one of the following to be applied to the AUT:

The combined signal from the Scorpion sources.

A modulated signal from an optional external modulation synthe

sizer.

A provision for the insertion of an optional external pre-amplifier (after the combiner and source selection switch) is also provided. Refer to Chap ter 7, “Preamplifier Operations,” for details.

The test set includes a bi-directional coupler at the input of the AUT that separates the incident signal from the reflected signal. The power rating of this bi-directional coupler is 100 watts average. The –30 dB portion of the incident and reflected signals are applied to the Scorpion reference port a1 and test port b

, respectively, for S11measurement. The S11mea-

surement determined by the DRA Scorpion is simply the ratio of the reflected signal to the incident signal.

The amplified output of the AUT is fed to a high power coupler in the test set. The power rating of this coupler is also 100-watts average. The –30 dB coupled arm of this coupler is routed to the test port b

of the Scorpion

througha6dBresistive divider and a 0-dB to 70-dB step attenuator (10dB/step). A limiter is also provided in this path provide added protec

tion for the Scorpion reference channel . The divider enables the connections of a power meter or Spectrum Ana

lyzer, when desired, to measure the AUT b

output.

The through arm of the 100-W coupler is routed to a high power (100-Watt) termination through a circulator. In the MS4782A Test Set, the circulator is internal and has a rating of 100 watts average. This circulator has an isolation specification of 20-dB minimum. This means that the AUT output power is attenuated by 20 dB (plus other losses) be fore reaching the Scorpion port 2. Since the maximum (no-damage) power level for this port is 27 dBm (0.5 watt), this establishes the maximum AUT output power at 50 watts.

In the MS4782D Test Set, the circulator is external as shown in Figure 1-2. In selecting an external circulator, the following criteria should be used.

Power rating: Should be no less than the power output of the ampli fier-under-test (AUT). It should be noted that a 100 watt termina

tion is provided in the Test Set for the termination port of the exter nal circulator.

1-6 ME 7840A OMM

GENERAL INFORMATION SYSTEM DESCRIPTION

Bandwidth: Should be sufficiently wide to cover the frequency band

of the AUT. Isolation: Should be no less than (Po-27 dB), where Pois the

power output in dBm of the AUT. Thus for Po = 47 dBm (50 watts), a 20 dB isolation is required. For a P dBm (100 watts), two circulators in series can be used.

Where S

or Hot S22measurements are not required, power amplifiers

with up to 100 watts average output power can be tested with the MS4782D Test Set without any circulator by connecting the through arm of the output coupler directly to the 100 watt termination (Port C1 con nected to Port C2 on the rear. The unit is shipped from the factory with this loop jumper.)

greater than 47 dBm up to 50

Connectors and Ports

CAUTION

Connecting the external circulator incorrectly or placing a direct connection between C1 and C3 on MS4782D rear panel will cause permanent damage to MS462XC.

For S

measurements, the transfer switch located within the Scorpion

routes the source 1 output signal to the output port of the AUT via Port 2 (RF2) of the Scorpion. A separate 100-watt coupler in the test set applies the –30 dB portion of this incident signal to the Scorpion reference port a

. The –30 dB portion of the signal reflected from the AUT output port is

applied to the Scorpion test port b

by means of the AUT output coupler.

The PATS calibration is performed with the test set in place, at the connectors where AUT will be connected directly. Therefore, the test set components and cables are included in the calibration loop and their effects are calibrated out, resulting in correct and accurate measurements of the AUT.

The software supplied by ANRITSU supports operator control of the source selection switch and step attenuator in the test set. This control is achieved through the parallel TTL control lines available at the Scorpion rear panel “External I/O” connector. The GPIB commands from the PC to the Scorpion set the TTL control lines to the desired states.

On the front panel of the Model MS4622/3C DRA Scorpion three Type N (female) connectors are provided for Ports 1, 2 and 3.

Port 1 provides RF source 1 when the transfer switch is in the forward position, and is terminated in 50 ohms to ground when the transfer switch is in the reverse position.

Port 2 provides RF source 1 when the transfer switch is in the reverse po sition, and is terminated in 50 ohms to ground when the transfer switch is in the forward position.

Port 3 is allocated to RF source 2. Under independent control, port 3 pro vides RF source 2, or is terminated in 50 ohms to ground.

On the rear of the unit, four SMA connectors (Figure 1-4) are provided for Reference ports a

and a2and Test Ports b1and b2. The front of the unit

as well as all other mechanical specifications is the same as the model MS4623B.

On the MS4782D Test Set, three additional SMA connectors provide for connecting an external circulator. If reverse measurements (S

and Hot

ME7840A OMM 1-7

SYSTEM DESCRIPTION GENERAL INFORMATION

WARNING

NOOPERATOR SERVICE-

ABLEPARTS INSIDE.

REFERSERVICING TO QUALIFIEDPERSONNEL.

IEEE 488.2

GPIB

Dedicated

GPIB

Serial Port

Ethernet

N274

Noise

+28V

Noise

Figure 1-4. MS462XC Rear Panel Showing Ports a1,a2,b1, and b

VGA

LPT LinePrinter

Ext

Analog

Trigger

Output

CAUTION

FORCONTINUED FIRE

PROTECTIONREPLACE

ONLYWITH SPECIFIED

TYPEAND RATED FUSE.

b1b

CAUTION

DONOT OPERATE

WITHPOWER CORD

UNGROUNDED

SCSI-2

REPLACE FUSEONLY WITH

ExtAnalogInExt

Ext I/O

47-440 Hz 85-264VAC

SAME TYPEAND RATING

Ext 10MHz

Source

Control

N274

WARNING

NO OPERATORSERVICE-

ABLE PARTSINSIDE.

REFER SERVICING TO QUALIFIED PERSONNEL.

Output

Ext Preamp

CAUTION

DO NOT OPERATE

WITH POWER CORD

UNGROUNDED

Input

50 dBm

Max

b2To

AUT

TestPort 2

External

Circulator

a2To

C2C1

27 dBm

VNMS Port 2

50 dBm

Max

100W

Termination

(Internal)

Max

LINE INPUT

85-240 VAC

47-63 Hz

100 VAmax

FUSE 250 V 1.6A T

CAUTION

FOR CONTINUED FIRE PROTECTION REPLACE ONLYWITH SPECIFIED TYPEAND RATED FUSE

Figure 1-5. MS4782A Rear Panel Showing Circulator Connections C1, C2, and C3

1-8 ME 7840A OMM

GENERAL INFORMATION K FACTOR

S22) are not desired, then a circulator is not required. Instead, a through line should be connected between connectors C1 and C2 (Figure 1-5). The MS4782A is shipped from the factory with this through line in place.

1-10 K FACTOR K factor is a parameter which is sometimes used to indicate the stability

of an amplifier. K factor is a function of all four S parameters and is de fined by the formula

--+1

Where D =S The necessary and sufficient condition for unconditional stability is that

K>1 and K factor is available as the sixth choice in the S parameters menu (first

five choices are: S setup as S-parameter measurements including a full 12-term calibration applies to this measurement. The result is “dynamic” meaning that the above formula is applied at each point for each sweep as the S parameters are reported to the PC over the GPIB.

11S22-S12S21

D<1

11 21

11,S22,S21,S12

and ALL). The same conditions and

1-11 ADAPTIVE P STOP Adaptive P stop lets users enter a gain compression value at which the

value during a power sweep. For exam-

1-12 SOFTWARE

DESCRIPTION

program will adjust the final P ple, if user sets 3 dB P-stop, the program commands the execution of one sweep, find P crement, and reset this as the upper bound of the power sweep.

The ME7840A software exhibits an open architecture that has been de veloped using standard C++ and Visual Basic languages. The software is compiled as an Active X exe module.

The software resides in the System Controller (PC), and communicates with the Direct Receiver Access (DRA) Scorpionâ Vector Network Mea surement System (VNMS) via the GPIB bus. Optionally, the ME7840A software can also interface with additional GPIB capable test equipment, such as a multimeter or a power meter.

value where 3 dB gain compression occurs, back up 1 in

1-13 TEST EXECUTIVE The Test Executive is an optional layer of test management software. The

ANRITSU measurement and display software does not require a separate Test Executive, even though it can operate in conjunction with one such as the National Instruments TestStand or customer’s proprietary Test Executive. In the absence of a separate test executive, the ANRITSU soft ware can be operated on a stand-alone basis or can be called directly by a Microsoft Windows 95/98/2000 or NT program such as Word, Excel or Ac cess that supports Visual Basic function calls.

ME7840A OMM 1-9

TEST EXECUTIVE GENERAL INFORMATION

The functions of the Test Executive, if supplied by ANRITSU or by the customer, would include:

Test Sequence development and management

Part number and serial number management

Interface with the Database

1-10 ME 7840A OMM

GENERAL INFORMATION SOFTWARE STRUCTURE

1-14 SOFTWARE

STRUCTURE

The software structure is illustrated in Figure 1-6 (below).

Test Executive:

Automated Testing,

Test Plan Development

( optional item )

GUI/EXE

Measurement, Calibration & Tuning

Anritsu

Modules

VNA PowerTools

V4.00

DLL/GUI

DLL

MS Access

Local/Network Database

Scorpion VNMS

Figure 1-6. PATS Software Structure

GPIB

RF Power

Meter

(Optional)

MultiMeter

(Optional)

Te st St at i on

Test Instruments

ME7840A OMM 1-11

MS7840A OPTIONS GENERAL INFORMATION

1-15 MS7840A OPTIONS The following options are available:

Table 1-2. MS7840A Options

Model Option Number Description

ME7840/1 1 Replaces MS4623C with MS4622C (3 Ghz option) ME7840/2 2 Replaces MS4782D Test Set with MS4782ATest Set ME7840/3 3 Delete Test Set (Note: The ND43425 Accessory and Inter

1-16 OPTIONAL

ACCESSORIES

connect Kit will also be deleted with this option.)

The accessories described below are available from ANRITSU.

Model ML2430A Power Meter

Model MG3672A Digital Modulation Signal Generator/with

MG0314A W-CDMA Modulation Unit Model MS2602A Spectrum Analyzer

Model MS8607A Digital Mobile Radio Transmitter Tester

AC/DC Current Probe (for AUT drain current and power-added-efficiency (PAE) measurements) (See below).

Max Current

100 mV/A: 10A

10 mV/A: 100A

1 mV/mA: 1A

10 mV/A: 80A

Accuracy (at lesser cur-

rent range setting)

3% of reading ±50 mA 2000-1067

2% of reading ±5 mA 2000-1085

ANRITSU Part Number

Circulators to be used externally with the MS4782D Test Set (see below).

Frequency Band Isolation Max AUT Power

800 to 1000 MHz 20 dB min 50 watts 1000-50

1.8 to 2.5 GHz 20 dB min 50 watts 1000-52

1.8 to 2.5 GHz 22 dB min 79 watts 1000-53 Note: All circulators have 3 SMA female connectors.

15SS50-0.35B Cable Assembly. Three of these cables can be used to

ANRITSU Part

Number

connect any one of the external circulators offered above to the

1-12 ME 7840A OMM

GENERAL INFORMATION PREVENTIVE MAINTENANCE

MS4782D Test Set. The same cable is also used to connect the Test Set to the MS462XC receivers on the rear panel.

1-17 PREVENTIVE

MAINTENANCE

1-18 USER SUPPLED

TEST SET

1-19 PERFORMANCE

SPECIFICATIONS

The ME7840A Power Amplifier Test System does not require any preven tive maintenance.

The ANRITSU MS4782X is the recommended test set for PATS; however, users supply their own test set. To ensure that such a test set will func tion properly with the PATS, a set of specifications and caveats is pro vided in Appendix B.

Specifications for the M7840A Power Amplifier Test System are provided in Table 1-3.

ME7840A OMM 1-13

PERFORMANCE SPECIFICATIONS GENERAL INFORMATION

Table 1-3. Performance Specifications for ME7840A Power Amplifier Test System

Characteristic Value Notes

100 W maximum With MS4782D Test Set and with23 dB

Amplifier Under Test Power Output

50 W maximum With MS4782A TestSet

isolation between AUT power output and MS4623C, Port 2

Bandwidth through Test Set

Amplifier Under Test Input Power range available from PATS

IMD 3rd Order Dynamic Range 70 dB min With 10 Hz IF Bandwidth @300 kHz tone

Port Power Accuracy

Drift over 60 hours 0.15 dB maximum, peak to peak Dynamic Range 80 dB minimum Overall system, including test set

Port Match (test ports 1 and 2)

Directivity 40 dB minimum Corrected value

Environmental

800 MHz to 2.4 GHz With MS4782D Test Set (Note 1) 800 MHz to 1.0 GHz With MS4782A TestSet

-85 to +5 dBm At AUT input

separation and -20 dBm tone levels ±0.1 dB maximum With flat power calibration ±1 dB maximum Without flat power calibration

40 dB minimum Corrected value 13 dB minimum Uncorrected value

Storage Temperature Range 40° Cto+75° C Operating Temperature Range 0° Cto+50° C Range Over Which Specifications Apply 23 ±3° C Relative Humidity 5% to 95% at +40° C Height 152.5 mm (6 in.)

Physical, MS4782X Test Set

Note 1: This frequency range does not take into account any restricting effects of the external circulator (if one is used for reverse

measurements)

Width 444 mm (17.4 in.) Depth 500 mm (19.7) Weight 10 kg (22 pounds) or less

1-14 ME 7840A OMM

GENERAL INFORMATION RECOMMENDED ITEMS

1-20 RECOMMENDED

ITEMS

Table 1-4. Recommended Test Equipment

Item Critical Specification/Notes Manufacturer/Model

Power Meter GPIB capable ANRITSU Model ML243XA

Power Sensor 10 MHz to 6 GHz ANRITSU Model MA247XA N connector Calibration Kit Type N Open, Short, Broadband Load ANRITSUModel 3653 or 3753LF Offset Termination 6 dB ANRITSU Model SC5237 Offset Termination 20 dB ANRITSU Model SC5270 Power Divider ANRITSU Model 11N50B Cable 50 Ohm, N-male to N-male ANRITSU Model 3670NN50-2 Adapter 50 Ohm, N-male to N-male ANRITSU Model 34NN50Ar GPIB Cable None ANRITSU 2100-2 SMA/3.5 mm Connector Calibration Kit Required if amplifier-under-test (AUT)

Table 1-2 provides a list of test equipment and other items needed for cal ibration and performance verification.

ANRITSU 3750LF

has SMA/3.5 mm connectors

1-21 USER SUPPLIED

ITEMS

Item Critical Specification

Personal Computer (PC) Pentium II or better, 200 MHz or faster, with WindowsÒ 95/98/2000 or NT operating

GPIB Cable None

The following items required for the operation of the ME7840A Power Amplifier Test System must be supplied by the user.

system and National Instruments GPIB card installed.

ME7840A OMM 1-15/1-16

Chapter 2 Installation

2-1 INTRODUCTION This chapter describes the installation, connection and set-up of the

equipment that comprises the ME7840A Power Amplifier Test Station.

2-2 EQUIPMENT

COMPLEMENT

2-3 UNPACKING and

INSPECTION

The ME7840A is made up of the following pieces of equipment:

Scorpionâ Vector Network Measurement System (VNMS), Direct

Receiver Access (DRA) version: Model MS4622C (10 MHz to 3 GHz) or Model MS4623C (10 MHz to 6 GHz)

Model MS4782X Power Amplifier Test Set

System measurement software

Current probe(s) (optional item)

One or more external circulators (optional item, for use with

MS4782D Test Set

Accessory Kit: Includes interconnect cables and 50W terminations for Aux ports

The ME7840A equipment has been securely packaged. The packaging material and container should be retained in case the equipment must be re-shipped or placed into storage.

The MS4622C or MS4623C DRA Scorpionâ VNMS and the MS4782X Test Set are each packed within heavy cardboard boxes.

Step 1. Carefully cut the sealing tape on the top box surface with a

packing knife.

Step 2. Open the box lids, and remove the upper layer of foam mate

rial.

Step 3. Lift the equipment from the boxes. Two persons should do

this, as the equipment is heavy and bulky.

ME7840A OMM 2-1

INSTALLATION - HARDWARE INSTALLATION

A listing of the non-optional-accessories always supplied with PATS is listed below. The cables and terminators are shown in Figures 2-3 and 2-2, on page 2-3.

Item Part No. Quantity

Broadband Termination 28N50LF 2 Control Cable 803-49 1 RF Cables, Type N connectors (front) 15NN50-0.25B 3 RF Cables, SMA connectors (rear) 15NN50-0.35B 4

2-4 INSTALLATION -

HARDWARE

System hardware is set-up is a straight-forward process. Follow the steps below in sequence to ensure a trouble free installation.

Step 1. Place the MS462XC on top of the MS4782X Test Set. Figure

2-1 shows how the green colored feet on the case of each unit stack on each other.

Foot

Figure 2-1. ME7840A Component Assembly

Step 2. Install the three front RF interconnect cables. Figure 2-3 (fol

lowing page) shows the installation of the RF interconnect ca bles between the front panel of the MS462XC and the front panel of the Test Set. Table 2-1 lists the applicable connectors by designation or function.

2-2 ME 7840A OMM

INSTALLATION INSTALLATION - HARDWARE

PORT 3

AUX OUT

EXTERNAL

SOURCE

INSTALL 50 OHM TERMINATIONS

ON UNUSED PORTS

INSTALL 50 OHM TERMINATIONS

ON UNUSED PORTS

PORT 1

PORT 2

PORT 1PORT 2PORT 3

TEST PORT 2

TEST PORT 1

AUT

Figure 2-3. ME7840A Front RF Cable Connections (through-line shown between test port 1 and test port 2)

GPIB CONNECTOR

GPIB CABLE

EXTERNAL I/O CONNECTOR

DEDICATED

GPIB CONNECTOR

(Used during

power level calibration)

AC POWER CORD

CONTROL CABLE

RF CABLES (4ea)

CONTROL IN CONNECTOR

AC POWER CORD

EXT PREAMP

OUTPUT

INPUT

CONTROL CABLE

CIRCULATOR

Figure 2-2. ME7840A Rear Cable Connections

ME7840A OMM 2-3

INSTALLATION - HARDWARE INSTALLATION

Step 3. Install the four RF cables between the rear of the MS462XC

and the Test Set. Torque the cables to 8 inch-pounds (SMA Connectors) or 12 inch-pounds (Type N connectors). Table 2-1 lists the applicable connectors by designation or function.

Table 2-1. RF Cable Connection

VNMS - FRONT

PORT 1 “TO PORT 1” PORT 2 “TO PORT 2” PORT 3 “TO PORT 3”

TEST SET - FRONT

TEST PORT 1 DUT INPUT TEST PORT 2 DUT OUTPUT

VNMS - REAR

PORT a1 PORT a1 PORT a2 PORT a2 PORT b1 PORT b1 PORT b2 PORT b2

MS4782D TEST SET - REAR

C1 Circulator 1 or C2 C2 Circulator 2 or C1

(See Figure 1-2 for a block diagram)

Connects To:

Connects To

TEST SET - FRONT

DEVICE UNDER TEST

MS4782X -REAR

CIRCULATOR

C3 Circulator 3 or Open

Step 4. Install the control cable between the External I/O connector

on the rear panel of the MS462XC and the Control In connec tor on the rear panel of the Test Set.

Step 5. Connect the GPIB cable from IEEE-488.2 connector on the

rear panel of the MS462XC to the PC/System Controller. (Note: This cable is not supplied with the ME7840A PATS.)

Step 6. Connect an AC power cord to each of the three-prong connec

tors on the rear panel of the Test Set and the MS462XC.

Step 7. (Optional, for drain current PAE measurements) Connect the

current probe cable BNC connector to the Ext. Analog In con nector on the rear of the MS462XC as shown in Figure 2-4 (page 2-5).

2-4 ME 7840A OMM

+ 96 hidden pages

Anritsu ME7840A User Manual

Table of Contents

Chapter 1 General Information

Chapter 2 Installation