Anritsu ML2430A User Manual

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ML2430A SERIES

POWER METER

OPERATION MANUAL

ANRITSU LTD (EMD) RUTHERFORD CLOSE STEVENAGE HERTS SG1 2EF

P/N: 10585-00001

REVISION: K

PRINTED: MARCH. 2000

WARRANTY

The ANRITSU product(s) listed on the title page is (are) warranted against defects in materials and workmanship for one year 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 ACKNOWLEDGMENTS

V Connector and K Connector are registered trademarks of ANRITSU Company. HP 436A, HP 437B, HP 438A, Deskjet, and HP 340 Deskjet are registered trademarks of Hewlett-Packard Company. Adobe Acrobat and Acrobat Reader are trademarks of Adobe Systems Incorporated.

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 malfunc tion, ANRITSU Company uses the following symbols to indicate safetyrelated information. For your own safety, please read this information care fully BEFORE operating the equipment.

Symbols used in manuals

DANGER

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

WARNING Indicates a hazardous procedure that could result in serious injury or

death if not performed properly.

CAUTION 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 information about safety items and opera tion precautions. Ensure that you clearly understand the meanings of the symbols and take the necessary precautions BEFORE operating the equipment.

This symbol indicates a prohibited operation. The prohibited operation is indicated symbolically in or near the barred circle.

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

This symbol indicates warning or caution. The contents are indicated sym bolically in or near the triangle.

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

These symbols indicate that the marked part should be recycled.

ML2430A OM 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 performance may be reduced. Moreover, this alert mark is sometimes used with other marks and de scriptions indicating other dangers.

WARNING

When supplying AC 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 cannot be repaired by the operator. DO NOT attempt to re move 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 un trained personnel. In addition, there is a risk of damage to precision com ponents.

WARNING

If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

SAFETY-2 ML2430A OM

Table of Contents

Chapter 1 - General Information

1-1 Scope of This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-3 Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-4 Identification Number . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1-5 Power Meter Models, Options, and Accessories . . . . . . . . . . . . . 1-2

1-6 Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3/1-4

Chapter 2 - Installation

2-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-2 Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-3 Sensor Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-4 Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-5 Environmental Requirements. . . . . . . . . . . . . . . . . . . . . . . 2-3

2-6 Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2-7 Battery Charging, Removal and Replacement . . . . . . . . . . . . . . 2-9

2-8 Storage and Shipment . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Chapter 3 - Connections

3-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3-2 Front Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3-3 Rear Panel Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Chapter 4 - Front Panel Operation

4-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-2 Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-3 Power-on Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-4 Sensor Menu4-5

4-5 Channel Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

4-6 Trigger Menu4-15

4-7 System Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20

4-8 Cal/Zero Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34

ML2430A OM i

Chapter 5 - Procedures

5-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2 Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-3 Zeroing the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-4 Sensor Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5-5 Sensor Zero/Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5-6 Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-7 Printer Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-8 GPIB Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-9 Serial Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5-10 RS232 Modem Support . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

5-11 Profile Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . 5-11

5-12 Source Sweep Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

5-13 Power vs. Time Mode . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

5-14 User Cal Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

5-15 Optimizing Readings. . . . . . . . . . . . . . . . . . . . . . . . . . 5-21

5-16 Operator Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 5-25

Chapter 6 - GPIB Operation

6-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-2 Typographic Conventions. . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-3 Data I/O Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-4 Query Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

6-5 GPIB PC Card Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

6-6 Using 488.1 GPIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6-7 Using 488.2 GPIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

6-8 Service Request Status (SRQ) . . . . . . . . . . . . . . . . . . . . . . 6-9

6-9 Functional Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

6-10 ML24XXA Native Commands . . . . . . . . . . . . . . . . . . . . . 6-12

6-11 GPIB Emulation Modes . . . . . . . . . . . . . . . . . . . . . . . . 6-84

6-12 ML4803A Emulation Commands . . . . . . . . . . . . . . . . . . . 6-85

6-13 HP 436A Emulation Commands . . . . . . . . . . . . . . . . . . . . 6-96

6-14 HP 437B Emulation Commands . . . . . . . . . . . . . . . . . . . 6-101

6-15 HP 438A Emulation Commands . . . . . . . . . . . . . . . . . . . 6-118

6-16 Programming Examples . . . . . . . . . . . . . . . . . . . . . . . 6-129

ii ML2430A OM

Appendix A - Specifications

A-1 Introduction A-1

A-2 System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A-3 System Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

A-4 System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . A-11

Appendix B - GPIB Quick Reference

B-1 Introduction B-1

B-2 ML24XXA Quick Reference . . . . . . . . . . . . . . . . . . . . . . . B-1

B-3 ML4803A Quick Reference . . . . . . . . . . . . . . . . . . . . . . . B-9

B-4 HP 436A Quick Reference . . . . . . . . . . . . . . . . . . . . . . . B-10

B-5 HP 437B Quick Reference . . . . . . . . . . . . . . . . . . . . . . . B-11

B-6 HP 438A Quick Reference . . . . . . . . . . . . . . . . . . . . . . . B-14

B-7 HP-IB Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-16

Appendix C - Menu Maps

C-1 Introduction C-1

C-2 Sensor Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

C-3 Channel Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

C-4 Trigger Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8

C-5 System Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9

C-6 Cal/Zero Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-15

Index

ML2430A OM iii/iv

Chapter 1 General Information

1-1

SCOPE OF THIS MANUAL

This manual provides installation and operation information for the Model ML2430A Series of ANRITSU Power Meters (Figure 1-1).

Figure 1-1. ML2430A Series Power Meters

1-2

1-3

INTRODUCTION

RELATED MANUALS

This chapter provides information to familiarize the user with the basic ML2430A Series Power Meter. Included is information about the equip ment identification number, models, options, and sensors.

This manual is one of a two manual set consisting of this Operation Man ual, and the 10585-00003).

These manuals are available on CD ROM as Adobe Acrobat™ (*.pdf) files. The files can be viewed using Acrobat Reader™, a freeware pro gram provided on the CD ROM. For price and availability, contact the nearest Anritsu Customer Service Center or visit our web site at:

www.global.anritsu.com.

ML2430A Series Maintenance Manual

(Anritsu part number

ML2430A OM 1-1

IDENTIFICATION NUMBER GENERAL

INFORMATION

1-4

1-5

IDENTIFICATION NUMBER

POWER METER MODELS, OPTIONS, AND ACCESSORIES

The ML2430A Series ID number is affixed to the rear panel (see Figure 3-2). Please use the complete ID number when ordering parts or corre sponding with the Anritsu Customer Service department.

The ML2430A Series Power Meter is available with either one or two sen sor inputs, and is delivered with a 1.5m sensor cable (ML2400A-20) for each input. Model numbers, options, and accessories are listed below.

Models

Model No. ML2437A Single Channel ML2438A Dual Channel

Options

Model No. ML2400A-01 Rack Mount, single unit ML2400A-03 Rack Mount, side-by-side ML2400A-05 Front Bail Handle

ML2400A-06 Rear Panel Mounted Input A ML2400A-07 Rear Panel Mounted Input A & Reference ML2400A-08 Rear Panel Mounted Inputs A, B, & Reference ML2400A-09 Rear Panel Mounted Inputs A & B

Number of Sensor Channels

Option

(Options -01 thru -05 are mutually exclusive.)

(Options -06 thru -09 are mutually exclusive.)

ML2400A-11 3000 mA-h, NiMH Battery

ML2400A-12 Front Panel Cover

(Can not be used with rack mounted units.)

ML2400A-13 External Battery Charger

Accessories

Part No. 760-206 Hard Sided Transit Case D41310 Soft Sided Carry Case with shoulder strap ML2419A Range Calibrator B41323 Serial Interface Cable MA2418A 50 MHz, 0 dBm Reference Source

Item

1-2 ML2430A OM

GENERAL SENSORS INFORMATION

1-6

SENSORS

The following sensors, sensor options, and sensor accessories are avail able for use with the ML2430A Series Power Meters:

Power Sensors (–70 to + 20 dBm) Model No. MA2468A 10 MHz – 6 GHz MA2469B 10 MHz – 18 GHz

MA2472A 10 MHz – 18 GHz MA2473A 10 MHz – 32 GHz MA2474A 10 MHz – 40 GHz MA2475A 10 MHz – 50 GHz

Thermal Sensors (–30 to + 20 dBm) Model No. MA2421A 100 KHz to 18 GHz MA2422A/B 10 MHz – 18 GHz MA2423A/B 10 MHz – 32 GHz MA2424A/B 10 MHz – 40 GHz MA2425A/B 10 MHz – 50 GHz

High Accuracy Sensors (–64 to +20 dBm) Model No. MA2442A 10 MHz – 18 GHz MA2444A 10 MHz – 40 GHz MA2445A 10 MHz – 50 GHz

Range

(–60 to +20 dBm, nominal bw 1.2 MHz)

Range

Universal Power Sensor

Model No. MA2481A 10 MHz – 6 GHz MA2480/01 Add Fast CW

Sensor Options MA2400A-10 Extra Cal Factor Freq., 0.01 – 40 GHz

Range

ML2430A OM 1-3

SENSORS GENERAL

INFORMATION

SensorAccessories

ML2400A-20 1.5m SensorCable ML2400A-21 0.3m SensorCable ML2400A-22 3m Sensor Cable ML2400A-23 5m Sensor Cable

ML2400A-24 10m Sensor Cable ML2400A-25 30m Sensor Cable ML2400A-26 50m Sensor Cable

NOTE

Theuseofsensorca blesgreaterthan10 metersinlengthisnot recommendedwhen measuringpulsesof lessthan10ms.

ML2400A-27 100m Sensor Cable ML2400A-29 Bulkhead Adapter

ML2400A-30 Extra Operation Manual ML2437/38A

ML2400A-33 Printer MA2499B Anritsu SensorAdapter MA2497A HP Sensor Adapter 1N75C 5WLimiter, 0.01 – 3GHz,Nm-f, 75W 1N50C 5W Limiter, 0.01 – 18GHz,Nm-f, 50W 1K50A 5W Limiter, 0.01 – 20GHz, Km-f, 50W 1K50B 3W Limiter, 0.01 – 26GHz, Km-f, 50W 42N75-20 5 WattAttenuator,Nm-f, 75W 42N50-20 5 WattAttenuator,Nm-f, 50W 42N50-30 50 WattAttenuator,Nm-f, 50W 42KC-20 5 WattAttenuator, Km-f, 50W

1-4 ML2430AOM

Chapter 2 Installation

2-1

2-2

2-3

2-4

INTRODUCTION

INITIAL INSPECTION

SENSOR HANDLING

POWER REQUIREMENTS

This chapter provides information for the initial inspection and preparation for use of the ML2430A Series Power Meter. Shipping and storage infor mation is also included.

Inspect the shipping container for damage. If the container or cushioning material is damaged, retain until the contents of the shipment have been checked against the packing list and the instrument has been checked for mechanical and electrical operation.

If the power meter is damaged mechanically, notify your local sales repre sentative or Anritsu Customer Service Center. If either the shipping con tainer is damaged or the cushioning material shows signs of stress, notify the carrier as well as Anritsu. Retain the shipping materials for the carrier's inspection.

The sensors are enclosed in a polycarbonate case to help prevent damage. The sensor connectors, however, are exposed and are a critical part of the microwave instrument. Refer to the MA24XXA Series Power Sensor manual (10585-00004) for detailed information on proper connector care.

The ML2430A Series Power Meter can be operated from either AC line power, external DC power, or from the optional internal battery. The ML2430A Series Power Meter is intended as an Installation (Overvoltage) Category II, Insulation Category I device.

At power-on, the power meter will perform a brief power-on self test (POST). If a POST error occurs, information and available options will be displayed on the screen (See Chapter 4, page 4-3). If the POST is suc cessful, the instrument will load the last used configuration, unless Secure mode has been selected (see Chapter 4, page 4-34, or Chapter 6, page 6-68).

AC Line Power

DC Power

The ML2430A Series Power Meter can operate on AC input power of 85-264V, 50-440 Hz, 40 VA maximum. The Power Meter automatically configures itself for the voltage applied. The AC line input is protected by an internal fuse.

The ML2430A Series Power Meter can also operate from a nominal external 12-24 VDC input in the ab sence of AC line power. DC line power is protected by

ML2430A OM 2-1

POWER REQUIREMENTS INSTALLATION

a fuse mounted inside the unit, on the main board. A grounding terminal is provided on the rear panel to ground the unit during operation from a DC supply.

Battery Power

The ML2430A Series Power Meter can be operated using the optional internal battery pack. During battery operation, an icon will be displayed on measurement screens indicating the state of charge. When the remaining capacity reaches less than 10%, the icon will flash, indicating that charging will soon be required. When running from battery power, an estimate of typical-use running time remaining can be viewed using the System menu (see Chapter 4, Front Panel Operation). Note that, due to power consumption con siderations, GPIB and serial remote operation are not available when the power meter is running from the battery.

The AUTO POWER OFF feature is also available through the System menu, and can be used to automatically switch the unit to standby after a specified period of inactivity to save battery power. The timer can be set for 10 to 240 minutes, and any key press will restart the timer. This same feature will automatically switch the unit to standby when the battery is fully discharged in order to minimize the risk of overdischarge.

NOTE

The ML2430A Series Power Meter uses a high-capacity Ni-MH battery (option ML2400A-

11). Over-discharge can result in a permanent loss of battery capacity of as much as 20%. If the unit is to be stored for an extended period (longer than one week), remove the optional battery pack so as to preclude over-discharge.

For optimum battery life, store the battery pack at –20 to +50° C (–4 to +122° F) for short periods and –20 to +35° C (–4 to +95° F) for long term storage.

The ML2430A Series Power Meter will operate from AC or DC main power with this battery removed. This battery is not used for the retention of nonvolatile memory functions. Refer to Section 2-7, Battery Charging, Removal and Replacement, for further infor mation.

2-2 ML2430A OM

INSTALLATION ENVIRONMENTAL REQUIREMENTS

2-5

ENVIRONMENTAL REQUIREMENTS

Fuses

Grounding

The ML2430A Series Power Meter is designed to operate within the temperature range of 0 to 50° C (32 to 122° F) with a maximum humidity of 90% at 40° C (104° F), non-condensing. Full accuracy is specified at 5 to 35° C (23 to 95° F).

Although not recommended, operation in temperatures to –20° C (–4° F) is possible. At these temperatures, however, the liquid crystal display may exhibit excessively slow response. The soft sided carry case (part number D41310) and optional front panel cover (option ML2400A-

12) can be used to help retain internally generated heat and may improve response.

The ML2430A Series Power Meter AC and DC input lines are protected by internally mounted fuses. These fuses should only be changed by qualified service per sonnel. Replace only with fuses of the same type and rating (AC fuse is 2A, 250V, slow-blow; DC fuse is 3A, 125V, slow-blow).

The ML2430A Series Power Meter must be properly grounded. Failure to ground the instrument could be hazardous to operating personnel. The meter is sup plied with a three-conductor power cord. The instru ment is properly grounded during AC line operation when the plug is connected to a properly installed three-prong receptacle. A grounding terminal is pro vided on the rear panel to ground the unit during op eration from a DC supply.

2-6

RACK MOUNTING

ML2400A-01 Rack

Mount Installation

The ML2430A Series Power Meter can be ordered with rack mounting hardware that allows the unit to be mounted into a standard 19-inch equipment rack. There are two rack mount option kits available:

The ML2400A-01 Rack Mount option allows the installation of a sin gle ML2430A in either the left or right side rack position.

The ML2400A-03 Rack Mount option allows side-by-side mounting of two ML2430A Power Meters.

The Power Meter itself must be ordered from the factory as a rack mount-ready unit. As such, it will be fitted with rack mount top and bottom cases. These cases have extra mounting holes so that the rack mount kits can be installed. Instructions for installing the rack mount kits follow.

This section describes the assembly procedure for fitting a single ML2430A Power Meter (PM) unit into an instrument rack. The PM must be fitted with rack mount top and bottom covers before the rack mount kit can be fitted. The proce dure involves fitting the support bracket to the PM. The PM can then be loaded and secured in the rack position desired.

ML2430A OM 2-3

RACK MOUNTING INSTALLATION

The required parts and tools are listed below:

Quantity

(each)

Description

HANDLE, PULL, CHASSIS, PLASTIC, HARDWARE

SPEED NUT

6-32, SST, WASHER, FLAT

M4, 8.00 MM, PHH, SCREW, FLAT HEAD

DECORATIVE SCREW

M3X8, POS, SST, PATCHLOCK, SCREW, METRIC, PAN HEAD

M3X5, POS, SST, PATCHLOCK, SCREW, METRIC, PAN HEAD

SNAP RIVET, PLASTIC

RACK MOUNT, SIDE, BRACKET

REAR SUPPORT, BRACKET, RACK MOUNT

RACK MOUNT, SUPPORT, BRACKET

BRACKET SUPPORT, BASE PANEL

FRONT FACE PLATE

POWER METER FITTED WITH RACK MOUNT TOP AND BOTTOM COVERS

Anritsu Part

Number

783-1055

790-319

900-345

900-795

900-821

905-68 .4lbf.in

905-72 .4lbf.in

788-575

C37276

C41449

D41473

49361

49362

ML2430A

Max. Torque

[45cN m]

Setting

Table 2-1 ML2430A-01 Rack Mount Kit Parts List

Tools Required: Small Phillips screw driver

Large Phillips screw driver Small Phillips torque screw driver 10cNm to 120cNm Assembly drawing “ML2400A/01 RACK MOUNTED LEFT OR RIGHT OPTION”

Assembly Procedure 1. Confirm the correct tools are available and the parts listed above are present. Re

fer to diagram on page 2-5 throughout this procedure.

2. Fit the two handles 783-1055 to front plate 49362 and the front rack bracket C37376 using 4 screws 900-795.

3. Lay the large support bracket D41473 next to the Power Meter as per the assem bly drawing. Note if the PM needs to be mounted on the left hand side of the rack, simply lay the bracket on the PM’s right side. i.e. a mirror image of the assembly drawing.

2-4 ML2430A OM

INSTALLATION RACKMOUNTING

Locate the support bracket on the four PM case pillars.Secure with 4 screws 905-68 and 4 washers 900-345.(See max.torque settings page 2-4.)

5.Locate the front rack mounting bracket C37276 at the front of the PM on the other side to the large support bracket with two screws 905-68 and two washers 900-345.(See max.torque settings page 2-4).

6.Locate the rear bracket C41449 at the back of the PM on the other side to the large support bracket with two screws 905-68 and two washers 900-345.See maximum torque settings above.Locate the rear bracket C41449 at the back of the PM on the other side to the large support bracket with two screws 905-68 and two washers 900-345.(See max.torque settings page 2-4).

7.Fit the front plate 49362 with 6 screws 905-72.(See max.torque settings page 2-4).

8.Position the base panel 49361 as shown in the drawing, and secure with 6 snap rivets 788-575.

9.Fit the four speed nut 790-319 to the rack in the correct place to allow mounting of the PM in the rack.

NOTE: FITCOMPLETED ASSEMBLYTORACKUSING DECORATIVESCREW900-821 X4ANDSPEEDNUT790-319 X4IN4CORNER POSITIONSASSHOWN

10.Slide the PM into the rack and secure with 4 decorative screws 900-821.

788-575 X6 SNAPRIVET PRESSDOWNCENTER

900-795 X4

PINUSINGAFLATEDGE

041473 SUPPORT BRACKET

905-72 X6 SCREW

49362 FRONTPLATE

49361 BASEPANEL

905-68 X8

900-345 X8

C41449 RACKMOUNT BRACKET REARSUPPORT

783-1055 HANDLE X2

C37276 RACKMOUNT SIDEBRACKET

ML2430AOM 2-5

RACK MOUNTING INSTALLATION

ML2400A-03 Rack

Mount Installation

This section describes the assembly procedure for fitting two ML2430A Power Meters (PM) into a instrument rack. The PM’s must be fitted with rack mount top and bottom covers for the rack mount kit to be fitted. The procedure involves fit ting support brackets, two front handles, and two rear support brackets, one to each PM. The two PM,s which are locked together can then be loaded and se cured in the rack position desired. This assembly procedure also provides assem bly instructions for fitting a ML2430A to a HP34401A Multimeter and a MF2412A Microwave Frequency Counter.

The required parts and tools are listed below:

Quantity

(each)

Description

HANDLE, PULL, CHASSIS, PLASTIC, HARDWARE

SPEED NUT

WASHER, 6-32UNC, OVERSIZE

M4, 8.00 MM, PHH, SCREW, FLAT HEAD

DECORATIVE SCREW

M3X8, POS, SST, PATCHLOCK, SCREW, METRIC, PAN HEAD

M3X6, POS, SST, PATCHLOCK, SCREW, METRIC, FLAT HEAD

WASHER, M4 SPLIT.

M4X12MM, SCREW, PAN HD

M3.5X8MM, SCREW, PAN HD

M4X10MM, SCREW, FLT HD

RACK MOUNT, SIDE BRACKET

RACK MOUNT, CENTRE, FRT, BRACKET

SPACER PLATE

RACK MOUNT, CENTER, FRONT, BRACKET

RACK MOUNT, SIDE, BRACKET

RACK MOUNT, CENTER, BRACKET

REAR SUPPORT, BRACKET, RACK MOUNT

POWER METER FITTED WITH RACK MOUNT TOP

Anritsu Part

Number

783-1055

790-319

900-345

900-795

900-821

905-68 .4lbf.in

905-69

900-807

900-806

905-103

905-63

49415

49413

49439

C37275

C37276

C37277

C37279

C41449

Max. Torque

Setting

[45cN m]

Table 2-2 ML2430A-03 Rack Mount Kit Parts List

2-6 ML2430A OM

INSTALLATION RACKMOUNTING

ToolsRequired: 1 Small Phillips screw driver

1 Large Phillips screw driver 1 Small Phillips torque screw driver 10cNm to 120cNm. 1 Assembly drawing “ML2400/03 SIDE BY SIDE OPTION”

Assembly Procedure 1.Confirm the correct tools are available and the parts listed above are present.Re

fer to diagram on page 2-8throughout this procedure.

2.On the two sides of the power meter to be joined together, fit the two rear brack ets 49413, C37279, and two front brackets C37275, C37277 using 8 screws 905-68 and 8 washers 900-345.(See max.torque settings page 2-6).

3.Slide the two PM units together and secure using 4 counter sink screws 905-69.

4.Fit the two handles 783-1055 to the front rack brackets using 4 screws 900-795.

5.Locate the two front rack brackets C37276 and 49415 at the front of each of the PM’s, one on each side with four screws 905-68 and four washers 900-345.See max, torque setting above.

6.Locate the two rear rack brackets C41449 at the back of each of the PM’s one on each side with four screws 905-68 and four washers 900-345.(See max.torque settings page 2-6).

7.Fit the four speed nuts 790-319 to the rack in the correct place to allow mounting of the two PM’s in the rack.

8.Slide the instruments into the rack and secure with the four decorative screws (900-821) provided.

ML2430AOM 2-7

RACK MOUNTING INSTALLATION

49415 RACKMOUNT SIDE BRACKET ( MULTI-F IT) . USE THIS BRACKET WHEN FITTING A HP34401A

905-63 x2

NOTE: FI T C OMPLETED ASSEMBLY TO RACK USI NG DECO RATI VE SCREW 900- 821 X4 AN D SPEED NUT 790- 319 X4 IN 4 CORNER POSI TIO NS AS SH OWN

905-68 x16

900-795 x4

C37275 RACKMOUNT BRACKET CENTER FRONT

905-69

905-63 x 4 USE THESE FIXING S WHEN FI TTING A HP 34401A TO A ML2430A O R MF 2412A

C37277 RACKMOUNT BRACKET CENTER INNER FRONT

900-345 x16

49439 X2 SPACER PLATE USE O N A HP 34401A ONLY, IN 2 POSITIONS WHEN FITTING TO A ML2430A O R MF 2412A. USE ALSO WITH SIDE BRACKET 49415

C37279 RACKMOUNT BRACKET CENTER INNER REAR

783-1055 HANDLE X2

49413 RACKMOUNT BRACKET CENTER REAR

C37276 RACKMOUNT SIDE BRACKET

900-807 X2 900-806 X2 USE THESE F IXIN GS WHEN FI TTIN G A MF2412A COU NTER T O A ML2430A POWER METER

900-103 X2 900-807 X2 USE THESE F IXIN GS W HEN FI TTING A HP34401A MULTIMET ER TO A ML2430A POWER METER

C41449 RACKMOUNT BRACKET REAR SUPPO RT X2 USE THESE BR ACKETS WHEN FI TTIN G A ML2430A TO ANO THER ML2430A POWER METER.

The procedure for fitting a ML2430A to a HP34401A Multimeter is as fol

lows:

1. Fit to the ML2430A Power Meter front brackets C37276, C37275 and rear bracket C41449 using 6 screws 905-68 and 6 washers 900-345. Do not tighten fully at this stage, only enough to allow the bracket to slide to its maximum position.

2. Fit the center rear bracket 49413 using 2 screws 905-63. (See max. torque settings page 2-6).

3. Fit to the HP34401A spacer plate 49439 in 2 positions with front brack ets C37277 and 49415 using 4 screws 905-63. (See max. torque settings page 2-6).

4. Offer up the HP34401A to the ML2430A unit ensuring the front bracket fixing holes ofboth units are in line. Slide the center rear bracket 49413 forward till it makes contact with the rear face of the HP34401A.

5. Gently remove the HP34401A unit and tighten the 49413 bracket fixings in its new position. (See max. torque settings page 2-6).

2-8 ML2430A OM

BATTERY CHARGING, REMOVAL AND REPLACEMENT INSTALLATION

2-7

OPEN

BATTERY CHARGING, REMOVAL AND REPLACEMENT

BATTERY

COVER

OPEN

The optional ML2430A Series Power Meter battery is a 12 Volt, 3000 mA-h nickel-metal hydride (Ni-MH) multi-cell pack, located in a compart ment on the bottom of the housing. The compartment cover is secured by fractional turn fasteners, as shown in Figure 2-1. Rotate the fasteners ap proximately ¼-turn counterclockwise to release the cover.

NOTE

ML2430A

BATTERY

COVER

FASTENERS

NOTE: Do not lubricate the battery cover fasteners.

Figure 2-1. Model ML2430A Series Battery Compartment

The battery is shipped with a partial charge only, and should be fully charged before use.

The battery can be completely charged in about two hours with the power meter in standby mode by selecting CHARGE from the System menu (page 4-30). This selection is available only when the instrument is being powered by AC line power or external DC power greater than 21 volts. Note that the instrument will shut down during the charging cycle, and re start automatically when the charging is completed. A series of 10 beeps signals completion of the charge cycle.

The external battery charger (option ML2400A-13) can completely charge the battery in 2.5 hours.

ML2430A OM 2-9

INSTALLATION BATTERY CHARGING, REMOVAL AND REPLACEMENT

CAUTION

To avoid excessive heat build

•

up, always remove the ML2430A from the optional soft sided carrying case (D41310) before selecting fast charging.

CAUTION

• The ML2430A battery pack can leak, explode, or catch on fire if it is opened, disassembled, or exposed to fire or very high temperatures. No attempt should be made to open, repair, or modify the battery package.

For optimal battery life, the battery should be fully discharged before re charging. Repeated partial charge/discharge cycles can result in a loss of battery capacity, recoverable by applying several “conditioning” (full charge/discharge) cycles. If the power meter determines that a battery conditioning cycle is required, a message stating this requirement will be displayed on the front panel, and will remain until the battery is fully condi tioned or replaced. A number of complete conditioning cycles may be nec essary to fully condition a battery.

The ideal battery temperature ranges are:

Discharging: –20 to +50° C (–4 to +122° F)

Charging: +10 to +45° C (+50 to +113° F)

Note that charging will be inhibited if the temperature falls outside these limits.

To remove the battery, first disconnect any AC or DC input line power. Open the battery compartment as illustrated and remove the battery. Replace the battery only with an identical battery or an equivalent as recommended by an Anritsu Service Center. Ensure that the battery is correctly connected and that the battery compartment cover is securely fastened.

Note that the battery is an optional component that is not used for the retention of nonvolatile memory functions, and is not required for the Power Meter to operate from either AC or DC line sources. Serial and GPIB remote operation, however, are not available when the power meter is running from battery power.

•

When a battery pack has reached the end of its func tional life, it should be re turned to the nearest Anritsu Service Center for proper re cycling or disposal. Do not treat a used battery as normal waste.

2-10 ML2430A OM

INSTALLATION STORAGE AND SHIPMENT

2-8

STORAGE AND SHIPMENT

Preparation for

Storage

Environmental

Requirements

Preparation for

Shipment

The following paragraphs describe preparing the power meter for storage and shipment.

Preparing the power meter for storage consists of cleaning the unit and packing it with moisture-absorbing desiccant crystals. Whenever the unit is to be stored for an extended period (longer than one week), it is advisable to remove the optional battery pack. Refer to Section 2-7, “Battery Charging, Removal and Replace ment,” for instructions.

Store the unit in a temperature controlled environment that is maintained be tween –40 and +70° C (–40 to +156° F), with a maximum humidity of 90% at 40° C (104° F), noncondensing. For optimum battery life, store the battery pack at –20 to +50° C (–4 to +122° F) for short periods and –20 to +35° C (–4 to +95° F) for long term storage.

To provide maximum protection against damage in transit, the power meter should be repackaged in the original shipping container. If this container is no longer available and the power meter is being returned to Anritsu for repair, advise Anritsu Customer Service Center; they will send a new shipping container free of charge. In the event neither of these two options is possible, follow the packaging instructions below.

Use a Suitable Container

Obtain a corrugated cardboard carton with a 275-pound test strength. This carton should have inside dimensions of no less than six inches larger than the instrument dimensions to allow for cushioning.

Protect the Instrume nt

Cushion the Instrume nt

Seal the Container

Address the Con tainer

Wrap the instrument to protect the finish.

Cushion the instrument on all sides by tightly packing dunnage or urethane foam between the carton and the instrument. Provide at least three inches of dunnage on all sides.

Seal the carton using either shipping tape or an industrial stapler.

If the instrument is being returned to Anritsu for service, mark the address of the appropriate Anritsu service center (Table 2-1), the Return Materials Authorization (RMA) number, and your return ad dress on the carton in a prominent location.

ML2430A OM 2-11

STORAGE AND SHIPMENT INSTALLATION

Table 2-3. ANRITSU Service Centers

UNITED STATES

ANRITSU SALES COMPANY 685 Jarvis Drive Morgan Hill, CA 95037-2809 Telephone: (408) 776-8300 FAX: (408) 776-1744

ANRITSU SALES COMPANY 10 Kingsbridge Road Fairfield, NJ 07004 Telephone: (201) 227-8999 FAX: (201) 575-0092

AUSTRALIA

ANRITSU PTY. LTD. Unit 3, 170 Foster Road Mt Waverley, VIC 3149 Australia Telephone: 03--9558--8177 FAX: 03--9558--8255

BRAZIL

ANRITSU ELETRONICA LTD Praia de Botafogo 440, Sala 2401 CEP 22250-040 Rio de Janeiro, RJ, Brasil Telephone: 021-527-6922 FAX: 021-53-71-456

CANADA

ANRITSU INSTRUMENTS LTD. 215 Stafford Road, Unit 102 Nepean, Ontario K2H 9C1 Telephone: (613) 828-4090 FAX: (613) 828-5400

CHINA

ANRITSU BEIJING SERVICE CENTER 416W Beijing Fortune Building 5 Dong San Huan Bei Lu Chao Yang Qu, Beijing 1000004, China Telephone: 011861065909237 FAX: 011861065909236

FRANCE

ANRITSU S.A 9 Avenue du Quebec Zone de Courtaboeuf 91951 Les Ulis Cedex Telephone: 016-44-66-546 FAX: 016-44-61-065

GERMANY

ANRITSU GmbH Grafenberger Allee 54-56 D-40237 Dusseldorf, Germany Telephone: 0211-67-97-60 FAX: 0211-68-33-53

INDIA

MEERA AGENCIES (P) LTD. Head Office A-23 Hauz Khas New Delhi 110 016 Telephone: 011-685-3959 FAX: 011-686-6720

ISRAEL

TECH-CENT, LTD Haarad Street No. 7 Ramat Haahayal Tel Aviv 69701 Telephone: 03-64-78-563 FAX: 03-64-78-334

ITALY

ANRITSU Sp.A Roma Office Via E. Vittorini, 129 00144 Roma EUR Telephone: 06-50-22-666 FAX: 06-50-22-4252

JAPAN

ANRITSU CORPORATION 1800 Onna Atsugi-shi Kanagawa-Prf. 243 Japan Telephone: 0462-23-1111 FAX: 0462-25-8379

KOREA

ANRITSU KOREA #901 Daeo building 26-5 Yeoido Dong, Youngdeungpo Seoul, Korea 150010 Telephone: 02-782-7156 FAX: 02-782-4590

SINGAPORE

ANRITSU (SINGAPORE) PTE LTD 3 Shenton Way #24-03 Shenton House Singapore 068805 Telephone: 226-5206 FAX: 226-5207

SOUTH AFRICA

ETESCSA 1st Floor Montrose Place Waterfall Park Becker Road Midrand, South Africa Telephone: 011-315-1366 FAX: 011-315-2175

SWEDEN

ANRITSU AB Box 247 S-127 25 Skarholmen Telephone: 08-74-05-840 FAX: 08-71-09-960

TAIWAN

ANRITSU CO., LTD. 8F, No. 96, Section 3 Chien Kuo N. Road Taipei, Taiwan, R.O.C. Telephone: 02-515-6050 FAX: 02-509-5519

UNITED KINGDOM

ANRITSU EUROPE LTD. 200 Capability Green Luton, Bedfordshire LU1 3LU, England Telephone: 015-82-41-88-53 FAX: 015-82-31-303

2-12/2-12 ML2430A

Chapter 3 Connections

3-1

3-2

INTRODUCTION

FRONT PANEL CONNECTORS

This chapter describes physical connections to the power meter on both the front and rear panels.

The front panel connectors are illustrated in Figure 3-1. Detailed descrip tions of each connector follow.

Calibrator Connector

Sensor A Connector

Sensor B Connector

(ML2438A only)

Figure 3-1. Model ML2430A Series Power Meter Front Panel Connectors

Calibrator

0.0 dBm Reference

ML2430A OM 3-1

This connector is a precision female N-Type, 50 Ohm connector that provides a precision, traceable 0.0 dBm, 50 MHz reference signal for absolute calibration of the sensors. The calibration signal can be turned on or off through the Cal/Zero menus (see Chapter 4, Front Panel Operation). Use only compatible 50 Ohm NType connectors.

REAR PANEL CONNECTORS CONNECTIONS

Sensor A

Connector

Sensor B

Connector

(ML2438A only)

An optional rear panel Calibrator connector is offered as an alternative (see Fig ure 3-2). If the rear panel connector option is installed, the front panel connector is not installed. Refer to Chapter 5, Procedures, for information on using the Cali brator output.

This connector is a 12-pin circular precision connector to be used in conjunction with power sensor cables. An optional rear panel Channel A connector is offered as an alternative (see Figure 3-2). If the rear panel connector option is installed, the front panel connector is not installed.

This connector is a 12-pin circular precision connector to be used in conjunction with power sensor cables. An optional rear panel Channel B connector is offered as an alternative (see Figure 3-2). If the rear panel connector option is installed, the front panel connector is not installed.

NOTE

Only MA2400A Series sensors can be connected directly to the ML2430A Series Power Meters. MA4700A and MA4600A Series sensors require the MA2499A or MA2499B Anritsu Sensor Adapter. MP-Series (10-pin) sensors require an MA4001A or MA4002B adapter and an MA2499B.

3-3

REAR PANEL CONNECTORS

The Rear Panel connectors are illustrated and described in Figure 3-2.

3-2 ML2430A OM

OPERATION REAR PANEL CONNECTORS

GPIB/ IEEE488 Connector

Standard General Purpose Inter face Bus connector used to con nect through GPIB to other test equipment and a host computer. The ML2430A Series is compatible with IEEE-488.1 requirements. Refer to Chapter 6, GPIBProgram ming for information on using GPIB.

RS232 Serial Connector

Serial control and data output commands are entered using the same format as the GPIB interface. Refer to Section 5-9 for more information on using Serial Remote Operation. Allows communication with an Anritsu 68/69000-series synthesizer in Source Sweep mode. Also allows service access for software upgrades, etc. The hardware handshake lines RTS and CTS are used to control the flow of data.

Sensor Connectors

Parallel Printer Port

Provides an interface to a stan dard parallel printer. Compatible printers include the Canon BJC80, HP 340 Deskjet, and most other 300 and 500 Series HP Deskjet printers.

ID Number Label

The ML2430A Series ID number is affixed to the rear

panel here. Please use the complete ID number when ordering parts or corre sponding with the Anritsu Customer Service depart ment.

85-264 VAC, 47-440 Hz, 40 VA maximum. The Power Meter automati cally configures itself for the voltage applied. Connecting AC power here will turn the instrument on. Subsequently, the instrument can be switched between the ON state and the STANDBY state using the front panel ON/OFF button. The optional battery can be fast charged when AC input voltage is applied through this connector and all other Power Meter func tions are off.

AC Main Power Input

Chassis Ground

Used as a convenient earth ground reference when DC line power is applied and an optional safety ground when operating from battery power.

DC Power Supply Input

Used for 12-24 VDC input in the absence of AC line power. The optional battery can be fast charged when the DC input voltage is greater than or equal to 21V and all other functions are off. Fast charge must be selected from the Sys- tem menu. The external DC Power Supply input line is protected by an internal fuse

Alternate Sensor input connec tors for Channels A and B. If the rear panel optional connectors are installed, the front panel connectors are not installed.

Calibrator Connector

Alternate Calibrator output con nector. If this rear panel connector option is installed, the front panel connector is not installed. Refer to Chapter 5, Procedures, for infor mation on using the Reference Calibrator output.

Figure 3-2. ML2430A Series Rear Panel

Output 2

Output 1

Multi-purpose BNC connector is user configurable for Modulation Output

(TTL), Analog Output 1 (volts/units), or Limits Pass/fail (TTL). Supports pass/fail testing for channels 1 and 2. Also configurable to output a real-time measurement signal from sensor input A, suitable for leveling purposes.

Multi purpose BNC connec tor is user configurable for Analog Output 2 (volts/units), Blanking Zero (TTL), or Lim its Pass/Fail (TTL). Supports pass/fail testing for channels 1 and 2. Also configurable to output a real-time measure ment signal from sensor in put B, suitable for leveling purposes.

Input 1, Digital

Multi purpose BNC con nector is user configur able for Blanking Input (used to ARM measure

ments in triggering

modes) or TTL Trigger Input.

Input 2, Analog

Multi-purpose BNC connector used for Volts per GHz connection. Supports 0 to

+20V nominal input voltage with software selectable scaling. V/GHz is used for automatic CAL FACTOR correction by applying an external voltage, scaled to fre quency. The correct calibration factor for this frequency is automatically interpo lated and applied when in V/GHz calibration factor mode. Different scaling may be applied to sensor A or B allowing for measurement of frequency translation de vices. Available simultaneously with channel A and/or B data, the data rate is as set on the channel. The default data rate is 20 ms in DEFAULT measurement mode (with the default settling time of 0.1%), and programmable in PROFILE operation mode and CUSTOM measurement mode.

ML2430A OM 3-3/3-4

Chapter 4 Front Panel Operation

4-1

4-2

INTRODUCTION

FRONT PANEL CONTROLS

The ML2430A Series Power Meter is controlled from the front panel using the five main menu keys; Sensor, Channel, Trigger, System, and Cal/Zero. This chapter explains the power-on procedure and the features and functions of each of the menus. Also refer to Appendix C for quick reference Menu Maps.

The front panel controls are shown and described in Figure 4-1. The following sections provide more detailed explanations of the Menus and soft keys.

NOTE

Where appropriate, related GPIB commands are listed in brackets under the menu selection. Refer to Chapter 6, GPIB Operation, for information on using GPIB commands.

NOTE

This manual is written for instruments fitted with software 3.00 or above.

ML2430A OM 4-1

FRONT PANEL CONTROLS OPERATION

Graphic LCD with Backlight

The LCD display settings are configured in the System menus. The backlight canbe turned on or off, or time delayed, as required to suit ambient conditions and battery drain. The backlight is controlled through the System menuswhen oper ating from the internal battery.

Numeric Keypad

Provides the means for entering numeric data in the appropriate menus as required for system configuration or calibration.

Soft Keys

Soft keys select submenus, toggle selections, control cursor position, and allow data entry. A flashing cursor indicates when numbers can be

entered using the numeric keypad. Refer to the following sections of this chapter for detailed in formation on using the soft keys.

Power On /Off

Switches the power meter from STANDBY to ON, or ON to STANDBY. Note that whenever AC power is applied, the power meter defaults to the ON state. Subsequently, the instrument can be switched between the ON state and the STANDBY state using this front panel Power On /Off key. When External or Internal (battery) DC power is first applied to the instrument (no AC present) the power meter defaults to the STANDBY state. It can then be switched to the ON state using the front panel Power On /Off key.

Figure 4-1. ML2430A Series Front Panel Controls

The clear (CLR) key performs various functions depending on when it is pressed. For example, when editing an entry in a menu, pressing the CLR key clears the digits. If in a menu screen, pressing the CLR key returns to the pre vious menu level. If the limits FAIL indicator HOLD audible alarm is sounding, pressing the CLR key stops the alarm. The FAIL indication is not affected by the clear key, and can only be cleared by turning fail hold off. If the GPIB box is on the screen and the system is not in a menu screen, and the system is in local mode (menus available), and no GPIB operations are pending, then pressing the CLR key clears the GPIB box off the screen.

Clear Key

Menu Keys

When pressed, the first level submenus appear on the display directly above the soft key for that menu function. Refer to the following sections of this chapter for detailed information on using the menu keys.

4-2 ML2430A OM

OPERATION POWER-ON PROCEDURE

4-3

POWER-ON PROCEDURE

At power-on, the power meter performs a brief power-on self test (POST). After the POST, the instrument loads the last used configuration and dis

play settings. If a POST error occurs, information and available options will be displayed on the screen.

The following tests are performed during the power-on self test, and also when the GPIB *TST? command is sent:

Table 4-1 Power-on Self Test

TEST SEQUENCE POSSIBLE STATUS

Flash EPROM code checksum Pass or Fail

Flash EPROM personality data checksum Pass or Fail

Flash EPROM calibration data checksum Pass or Fail

Volatile RAM tests Pass or Fail

Non-volatile RAM checksums Pass, Fail

WARNING - Software version changed - all non-vol stores reset

Current store failed - current store reset

Saved store(s) failed - failed store status changed to not saved

WARNING - Secure mode clear memory - all non-vol stores reset

Display Pass or Fail

Keyboard Pass or Fail

During the power-on self test, only failures and warnings will be displayed on the front panel. If all tests pass successfully, no self test information is displayed.

Failure and warning messages that can be displayed on the front panel are:

Flash code csum Personality csumVolatile RAM Cal data csum Non-Vol RAM Software version - this is only a warning Current Setup Saved Setups Secure - Mem clear - this is only a warning Display Keyboard DSP error # - followed by a 4-digit hexadecimal error code

ML2430A OM 4-3

POWER-ON PROCEDURE OPERATION

If any error, other than a DSP error, is encountered, the text:

“Press ANY key to continue”

will be displayed at the bottom of the screen. If only warnings are encountered, nothing will be displayed at the bottom of the screen, and the unit will continue to initialize.

If a DSP error occurs, the text:

"Restart unit. If error persists, con-tact Service Center."

is displayed and the unit will halt the self test. Make note of the hexadeci mal error code displayed and contact your nearest Anritsu Service Center (see Chapter 2, Table 2-1).

Self test error messages are also available over the GPIB, as a self test status string (see STERR command, page 6-74).

4-4 ML2430A OM

OPERATION SENSORMENU

4-4

TheMODEselectionis notavailableinProfile orSourceSweep modes.

SENSOR MENU

Setup Selects the data acquisition controls for the sensor.The followingsubmenusare

NOTE

The Sensor menu has controls for sensor data processing.

NOTE

When editing an entry in a menu, pressing theCLRkey clears the digits.If in a menu screen, pressing theCLRkey returns to the previous menu level.

displayed.

SENSOR

OPTION

MODE

[SENMM]

Model ML2438A (dual channel) only.Select the sensor to be con figured.Toggles between Channel A and Channel B for all sub menu functions.

Only displayed if a Universal Power Sensor with Option 01 is con nected to selected input channel.This key selects between True RMS sensor operation (for WCDMA measurements) and Fast CW (for TDMA/Pulse measurements).

Select either Default, Modulated Average, or Custom.

Default is the sensor mode setting following system preset.It is the ML2430A Series simplest operating mode.Measurement speed is automatically adjusted according to sensor response times and the user-adjustable Settling %.Triggering controls, except for GPIB trigger, are disabled when the sensor mode is set to Default.This is intended to simplify basic power measurement by avoiding the necessity of specific trigger settings.

Modulated Average mode is used to stabilize the front panel digital

NOTE

Whenmeasuringmod ulatedsignalswithadi odesensor,ensure ModulatedAverageis selectedormeasure menterrorsmayresult.

readout.It is a specialized sensor mode for either MA2440A or MA2470A Series power sensors.These sensors are fast enough to demodulate the amplitude modulation of many RF test signals.The Mod Average sensor mode is unnecessary for thermal power sensors.

The Custom sensor mode permits the highest measurement rates. Trigger controls are available with this sensor mode.Trigger Delay (the time between the ML2430A Series receipt of a valid trigger event and the start of sample integration) and Gate Width (the du ration of sample integration) controls are located in the Trigger menus.

When using universal power sensors only default mode is avail able unless OPTION is set to Fast CW.Fast CW can only be se lected for sensors supplied with option 01.

ML2430AOM 4-5

SENSOR MENU OPERATION

NOTE

The HOLD selection is not available when System/Setup/mode is set to Source Sweep. In this mode, AUTO ranging is used.

HOLD

[RGH]

Allows the operating range of the selected sensor to be set to the desired range. Select a Range Hold value of 1 to 5, or Auto. When in Auto, the range changes to take the best measurement automati cally. Auto is the default setting following system preset.

Typical Range Hold values for diode sensors are:

Range 1 above approximately –12 dBm

Range 2 –10 to –27 dBm

Range 3 –25 to –42 dBm

Range 4 –40 to –57 dBm

Range 5 below –55 dBm

NOTE

SETTLE% affects GPIB speed. Consider this when optimizing GPIB performance.

Calfactor Allows entry of the calibration correction factor. The calibration factor compen-

NOTE

Frequency or V/GHz are pre ferred methods as the sen sors have internal linearity correction which varies with frequency.

SETTLE %

[SENSTL]

Settle % per reading is available when the sensor mode is set to Default. The settling time allows some control over the tradeoff between speed and the extent to which a measurement has settled to its final value. A 1% settling value relates to approximately 0.04 dB,

0.5% relates to 0.02 dB and 0.25% to 0.01 dB. The default value after a system preset is 0.1%, or about 0.004 dB. Increasing the Settle percent to 1% or more will substantially increase measurement speed.

sates for mismatch losses and effective efficiency over the frequency range of the power sensor.

SENSOR

Model ML2438A (dual channel) only. Select the sensor to be con figured. Toggles between Sensor A and Sensor B for all submenu functions.

SOURCE

[CFSRC CFVAL]

Three selections are available, Frequency, Manual, and V/GHz.

Frequency

In this mode, correction data is read from the EEPROM in the sen sor and applied automatically to the measurement based on the us

er’s input frequency. The EEPROM correction data value nearest to the entered frequency is used to calculate the correction applied to the signal.

4-6 ML2430A OM

OPERATION SENSOR MENU

For greater accuracy, calibration factors are interpolated for settings that are between the calibration factor data provided in the sensor

NOTE

When the MA2499B Anritsu Sensor Adapter or the MA2497A HP Sensor Adapter are used, the input frequency should be set to 50 MHz irre spective of the measurement frequency. Linearity correc tion factors are not applied when the adapters are being used.

NOTE

You will see a live update of the Current Cal Factor only if that sensor is being used on a channel. For example: If you are editing the Cal Factor Frequency on Sensor B, but you only have channel 1 set to A and channel 2 off, you will not see the "Current Cal Factor" being updated.

NOTE

User defined Cal Fac

tor tables are available for applications where user-supplied calibra tion points are re

quired. Additional cal factor frequencies can be entered in a user ta ble and used in con

junction with the factory table.

FREQ

[CFFRQ]

USE TABLE

[CFUSEL CFUTBL CFUUSE CFUVLD]

EEPROM. For example, if calibration factors exist for 1 and 2 GHz, then the calibration factor applied for 1.5 GHz will be a value mid

way between the two.

Sensor linearity adjustments for temperature are also interpolated; If the correction factor for 1.5 GHz at 25° C is 1 dB, and for 35° C is

1.1 dB, then at 30° C a value of 1.05 dB will be used.

Manual Set

Allows manual correction of sensor data either as a percentage or a fixed dB value. An input frequency is also required to allow the correct linearity correction factors to be applied.

V/GHz

Most modern synthesized sources have a rear panel BNC connec tor which outputs a voltage proportional to the synthesized frequency. The V/GHz is supplied to the rear panel input connector of the ML2430A Series. The SETUP submenu has controls for customizing the voltage and frequency relationship.

When the Cal Factor source is set to Frequency or manual, enter the input signal frequency in GHz or MHz. The correct sensor calibration factor is automatically interpolated and applied to the displayed power reading.

Defines which calibration factor table is to be used. Can be set to Factory, table number 1-10, or Factory + table number. The maxi

mum number of tables available is displayed on the screen, and is never greater than 10. If a selected table has not been used before, the user will be prompted to CLEAR or PRESET the table, or can cel the selection. If a table is CLEARED, all entries are cleared ex

cept for a single entry of 100% @ 50 MHz. If a table is PRESET the factory defined calibration factor table is copied into the speci

fied user calibration factor table. The CLEARED or PRESET table is saved directly to the sensor. PRESET clears the ID string, while CLEAR leaves the ID string as currently set.

The number of tables available is defined by the frequency range of the sensor and the amount of factory calibration data stored.

Delete

Deletes the currently displayed table number.

ML2430A OM 4-7

SENSOR MENU OPERATION

Factory

Selects the Factory calibration factor table. Pressing Factory and

NOTE

Whichever set, or sets, of cal factors are used, the linearity and tem perature correction re mains active at all times. Ensure the power meter is pro grammed with the fre quency of the signal being measured.

%/dB

[CFUNITS]

the +/- key on the numeric keypad allows selection of a userdefined table in addition to the factory table. This allows full factory calibration to be active, and allows adjustments or corrections to be entered in the user-defined table. If user table 1 was selected, the menu would show ‘Factory+1’ and the Status box on the readout display would show a warning ‘*’ sign on the Cal Factor line (bottom text line in the box) to show that non-standard calibration is being applied (CAL *F or CAL *V).

Enter

Confirms the selection.

Toggles the Current Cal factor display format from percentage to dB, and back.

NOTE

Manual Cal Factor method only.

EDIT

[CFUADD CFUSAV CFUCT CFUPT CFULD CFURD CFUID]

FACTOR

[CFCAL]

CAL ADJUST

[CFADJ]

Edit any of the available user calibration factor tables in the sensor. Options available are CLEAR or PRESET the table, enter a new table identity string, change or delete existing frequency/cal factor data pairs, or enter new frequency/cal factor data pairs. All frequency/cal factor data pairs can have both frequency and calibration factor value modified, except for the data pair at 50 MHz, which can only have its cal factor value changed. All frequency/cal factor data pairs can be deleted, but there must always be one data pair remaining. If there is a data pair at 50 MHz, this will be the data pair that will remain.

The user must ensure that the maximum number of cal factor data pairs entered into a table is not exceeded. Sensors with a maxi

mum frequency of up to 40 GHz will hold 90 pairs, while sensors with a maximum frequency of 50 GHz will hold 110 pairs.

Once all changes have been made, the SAVE soft key saves the changed data to the sensor. If any user cal factor data is changed and not saved, any attempt to exit the cal factor menu or select a new table will result in a prompt to discard or save the changes.

When the Cal Factor Source is set to Manual, the operator is ex

pected to enter the calibration factor value in dB or % terms.

Sets a calibration factor to be used when performing a 0 dBm cali

bration and the calibration factor source is set to 'Manual.' This value is the only factor applied when performing a 0 dBm reference calibration. If the sensor calibration factor source is set to V/GHz or Frequency, the sensor internal EEPROM correction value at 50 MHz is used.

4-8 ML2430A OM

OPERATION SENSOR MENU

Averaging Sensor data averaging. The available soft keys depend upon the operating mode

NOTE

Automatic averaging also applies an algorithm to enhance settling at low power levels (e.g.,signal sources).

SETUP

[CVSTF CVSPF CVSTV CVSPV]

Sets up the Start and Stop frequencies and voltages when Source is set to V/GHz. This tells the ML2430A how to determine the fre quency of the swept signal based on the applied rear panel voltage.

selected.

In Readout and Power vs. Time modes, the following soft keys appear:

SENSOR

Model ML2438A (dual channel) only. Select sensor A or B, in Power vs. Time or Readout modes.

MODE

[AVG AVGM]

Select OFF, AUTO, MOVING or REPEAT, in Power vs. Time or Readout modes.

AUTOMATIC averaging uses a MOVING type of average and in creases the amount of averaging as the noise level increases. The display updates at approximately 100 ms intervals, however the data is available at the full rate. The display is slowed down to prevent jitter and allow the user to follow the update.

MOVING average allows the user to manually select the amount of averaging regardless of the signal level. The display is continually updated while averaging.

NUMBER

[AVG AVGM]

When selected, the following soft key becomes available:

Sweep averaging number (1 to 512).

ML2430A OM 4-9

SENSOR MENU OPERATION

REPEAT averaging also allows the user to manually select the

NOTE

GPIB trigger com mands automatically apply REPEAT averag ing after TR2 com mands to ensure ‘old’ samples are excluded from the measurement. However, the user should be aware that due to the high speed of the meter, other in struments in the ATE system may not be set tled.

LOW LEVEL

[AVGLL]

amount of averaging regardless of the signal level, however the dis play is updated only when the NUMBER of readings specified have been taken (1-512).

NOTE

Due to the nature of this method of operation, if the power level changes between updates, the display update will not reflect the true input power for one measurement only. When a channel is set to a ratio, e.g., A–B or A/B etc., the repeat method described above only operates if all sensors are set to the REPEAT mode.

Select OFF, LOW, MEDIUM, or HIGH, Low Level Averaging, in Power vs. Time or Readout modes. Sets the low level averaging window for the sensor. At resolution settings of 0.01 and 0.001 dB, digital readouts may flicker due to the high reading rate of the power meter. Low level averaging applies a low pass filter to postaverage data readings to achieve a more stable front panel display without slowing down the response of the meter to larger changes in level. The three windows for LOW, MEDIUM and HIGH low level averaging are ± 0.01, 0.02, and 0.05 dB.

For example: When a LOW setting of low level averaging is applied while stepping from 0 dBm to –1 dBm, the meter displays the final reading within 0.01 dB with no delay. The final settling of 0.01 dB will settle over a short subsequent period of time, leading to a stable high resolution readout.

With a HIGH setting of low level averaging, the settling window is increased (up to approximately 0.05 dB) and the settling time is longer.

With low level averaging OFF, the meter displays the final reading instantly with no further settling observed. Any jitter due to noise is reflected in the displayed reading, which may be inconvenient for high resolution readings.

In Profile and Source sweep modes, the following soft keys appear:

STATE

[GRSWS]

Graph averaging state, ON or OFF. When set to ON, the following additional soft keys appear:

A NUMBER B NUMBER (ML2438A only)

[GRSWP]

Sweep averaging number (1 to 512).

4-10 ML2430A OM

OPERATION SENSOR MENU

RESET

Sweep average reset. If the graph sweep averaging state is ON, this key resets the data points and restarts the sweep to sweep mode.

Offset Allows an offset, in dB, to be applied to sensor data for the selected sensor.

NOTE

Use Fixed or Table to compensate for a fixed attenuator on a sensor for measuring higher power levels. A better method is to apply a Fixed cal factor in the User tables as this is then taken into account in the Zero/Cal pro cess.

CURSOR

[GRSWR]

Between cursor averaging ON or OFF. When ON, a digital readout of the average power between the two cursors is displayed in the readout area of the PROFILE display.

SENSOR

Model ML2438A (dual channel) only. Used to select the sensor to be configured. Toggles between Channel A and Channel B for all submenu functions.

TYPE

[OFFTYP]

Selects the type of offset to be applied:

Off

No offset applied.

Fixed

A fixed dB offset VALUE is applied to the sensor data.

Table

The tables are a set of frequency-against-dB offsets. The offset value used from the table depends on the setting of the frequency correction source. If the source is FREQUENCY, the entered frequency is used to calculate the offset from the table. If the fre

quency correction source is V/GHz, the frequency value calculated from the supplied ramp input is used to calculate the offset from the table.

If the frequency does not match any frequency in the table, interpo

lation is used to calculate the correct offset.

NOTE

If the frequency is greater than the maximum frequency in the table, the offset value from the maximum table fre

quency is used. If the frequency is less than the minimum frequency in the table, the offset from the minimum table frequency is used.

VALUE

[OFFFIX OFFVAL]

Enter the offset value (dB) when Offset TYPE is set to Fixed. Valid range is –99.99 to +99.99.

ML2430A OM 4-11

SENSOR MENU OPERATION

TABLE

[OFFTBL OFFTBR OFFTBU OFFVAL]

Select the offset table number (1-5) when Offset TYPE is set to Ta ble. When a table is selected, additional soft keys become available:

EDIT

This will bring up all of the selected offset table’s entries, with their associated frequencies and offsets. Select an entry and enter the frequency and offset using the keypad.

CLEAR

[OFFCLR]

When an offset table is selected, CLEAR will set all of the table’s elements to zero.

Duty cycle Applies a duty cycle to the selected sensor. An offset will be applied based on the

entered value.

SENSOR

Model ML2438A (dual channel) only. Used to select the sensor to be configured. Toggles between sensor A and sensor B for all submenu functions.

STATE

[DUTYS]

ON or OFF

Rng Hold

[RGH]

NOTE

Rng Hold is not available when System|Setup|mode is set to Source Sweep. In this mode, AUTO ranging is

DUTY

[DUTYS]

Delete, Enter, or Cancel. An offset will be applied based on the entered value. For example, specifying a duty cycle of 50% will alter the displayed readings by approximately +3.01 dB.

This function will toggle the sensor between holding the present operating range and Auto Ranging. Auto Ranging automatically selects the best range to take the measurement.

If either sensor is auto ranging, this key will force both sensors to hold their pres ent operating ranges. If either sensor is held within an operation range, this key will force both sensors to Auto Range.

4-12 ML2430A OM

OPERATION CHANNEL MENU

4-5

CHANNEL MENU

Setup The setup menu allows the user to set up the configuration of the display chan

The Channel menu controls the operation of a display channel. There are two display channels, Channel 1 and Channel 2. Channel 1 appears at the top of the readout display and channel 2 at the bottom. If a channel input configuration is turned off, the remaining channel appears in the center of the screen.

NOTE

When editing an entry in a menu, pressing the CLR key clears the digits. If in a menu screen, pressing the CLR key returns to the previous menu level.

The Channel submenus are as follows:

nels. The setup parameters are:

CHANNEL

INPUT

[CHCFG]

Selects the channel to be configured. Toggles between Channel 1 and Channel 2.

This is the sensor, combination of sensors, or rear panel BNC input that is used to calculate the measured and processed value for this channel. For the Model ML2437A (single input) power meter, the available options are A, External Volts, or OFF. For the ML2438A (dual input) power meter, the options are A, B, A – B, B – A, A/B, B/A, External Volts, or OFF.

NOTE

Use MIN/MAX to track variations in a mea surement over time, or while adjusting exter nal devices or tuning over frequency.

UNITS

[CHUNIT]

RESOLUTION

[CHRES]

MIN/MAX

[MNMXS GMNMX]

The units can be dB(m), Watts, dBµV, or dBmV. If the External Volts input is selected, the units are fixed to Volts.

The number of decimal places in which the results are displayed in Readout mode, with certain limitations. If the units selected are in Watts or Volts, and the value goes down to pW or µV, the number of decimal places is forced to zero. If the number to be displayed is too large for the number of decimal places selected, the decimal places displayed will be reduced.

This selection turns on the Min/Max Tracking for the display chan nel selected. On the top line of the data display, when not in menu mode, the min and max of the channel data (after combination and unit conversion calculations) is displayed. The left hand set of data is for display channel 1 and the right hand set for display channel 2.

In Profile mode, the Min/Max is between cursors only, as controlled by selecting SINGLE or INFINITE through the System|Graphics|TRACKING menu. SINGLE (default) is the most useful as it provides a continuously updated readout of the Min/ Max points within the cursor window. The INFINITE setting is used when the results needs to be collated over a large number of samples.

ML2430A OM 4-13

CHANNEL MENU OPERATION

RESET

[MMRST]

Rel 1

[REL]

Rel 2

[REL]

Limits Pressing the Limits menu soft key displays the test limits for the selected channel.

After the relative power level is set by the operator, the Relative mode subtracts that value from the current measured power. If selected when in Relative mode, the relative operation for channel one is turned off.

Pressing the Rel 1 soft key when in Readout mode will subtract the last used relative value. Hold down the key to retake this value. The readout will display

0.00 dBr. This relative value will be used thereafter until it is replaced by another one in the same manner. This allows the user to refer to a previously referenced value, without the meter resetting itself back to a 0.00 display.

Relative mode control for Channel 2 is labeled Rel 2.

This menu sets individual high and low pass/fail limits for the two display chan nels. These limits drive the PASS/FAIL display flags and the PASS/FAIL TTL output if selected.

In Power vs. Time graphic mode and Readout digital mode, each fail of the limits produce a separate fail flag and fail beep (if ON) and also drive the rear panel BNC (if enabled) for each pass or fail reading. In PROFILE mode, each fail of the limits produce a fail beep (if ON) and hold the fail output if any point in a sweep fails. If FAIL indicator HOLD is ON, both the screen FAIL indicator and the BNC output are held in the fail state whenever the limits specified for the channel have been exceeded, regardless of whether the reading subsequently goes into pass or not. This state remains until FAIL indicator HOLD is turned OFF.

This function resets the Min/Max (when ON) for the channel selected.

CHANNEL

HIGH Limit

[HLIM]

The limits are set for the selected display channel unit type. The display channel units selected when the limit was originally set or turned on become the limit units. If the display channel units are changed, and the limits not altered, limit checking is turned off for that channel. If the display channel units are subsequently returned to the same units selected when the limit was entered or turned on, limit checking is turned on again.

Whenever the limit units are active, limit checking is applied as fol lows: If the channel value is greater than the high limit, and the high limit is turned ON, a FAIL is indicated. If the channel value is below the low limit, and the low limit is ON, a FAIL is indicated. Otherwise, if any limit is ON and a FAIL is not detected, PASS is indicated.

Sets the high limit. It is not necessary to enter the units as the limit value is checked against the displayed value. Therefore, if the limits

4-14 ML2430A OM

OPERATION CHANNEL MENU

have been set for –10 dBm and the display units are subsequently changed from dBm to Watts, the system still checks for the reading

NOTE

In Profile mode, the limit value is only checked against dB values as Profile mode only works in dB.

to rise above –10, even though the display units type has been changed. Enter a value from:

Units Min Max

dBm –99.99 +99.99

dBmV –53.00 147.00

dBµV

Watts 0.0 50.0

7.00 207.00

Setting a limit value automatically turns on the limit state, except when done via GPIB.

LOW Limit

[LLIM]

HIGH State

[HLIMS]

LOW State

[LLIMS]

FAIL HOLD

[FHOLD]

BEEP

[FBEEP]

Sets the low limit. It is not necessary to enter the units as the limit value is checked against the displayed value.

Select ON or OFF to enable or disable high limit checking.

Select ON or OFF to enable or disable low limit checking.

If FAIL HOLD is ON, both the screen FAIL indicator and the BNC output are held in the fail state whenever the limits specified for the channel have been exceeded, regardless of whether the reading subsequently goes into pass or not. This state remains until FAIL HOLD is turned OFF.

If BEEP is ON, and FAIL HOLD is OFF, whenever the limits speci fied for the channel have been exceeded, a single beep sounds.

If fail BEEP is ON and FAIL HOLD is ON, whenever the limits specified for the channel have been exceeded, a beep will sound once every second until FAIL HOLD is turned OFF, or the CLEAR key (CLR) is pressed.

The FAIL indication is not affected by the CLEAR key, and can only be cleared by turning FAIL HOLD off. If a limit fail happens again, the alarm will sound again.

ML2430A OM 4-15

TRIGGER MENU OPERATION

4-6

TRIGGER MENU

The Trigger function in the ML2430A allows the user to define under what condi tions measurements are taken, and the time period they are taken over. For in stance, the READOUT mode can be configured to display the average power of the ON period of a square wave, or an individual slot in a GSM burst.

The Trigger menus are always available in PROFILE operation mode, as selected from the System menu. If PROFILE cannot be selected within the System|Setup submenu, change the GPIB mode to ML24XX in the System|Rear Panel submenu.

In READOUT or POWER vs. TIME modes, the trigger setup menus are available if the channel input configuration SENSOR|Setup|MODE is set to CUSTOM.A display channel using more than one sensor (A–B for example) where either sen sor is in CUSTOM mode, is assumed to be in custom mode and can use trigger ing. Trigger setup is available only for the display channels that meet the above criteria.

In PROFILE mode, the display shows an ‘x’ marking the trigger point plus the display trigger delay time, updated for each new set of data. This trigger point mark rotates as the profile data is updated, changing between '´' and '+' on each data update. On rapid updates, the trigger point mark may appear like a star ( is rotating so quickly. In manual, external or GPIB triggered displays, the mark rotates at a slower rate and each true data update can be seen.

This point can be moved across the x axis by the pre trigger percentage. If the trigger source is either default, mod average or custom continuous, the trigger point has no meaning since the system is continuously triggering. The mark does not appear in the Power vs. Time or Source Sweep modes, as it is not applicable.

S), as it

Trigger icons indicate the type of triggering selected and appear level with the re lated channel on the far left of the screen. Trigger icons are not displayed if the system is in Profile, Power vs. Time, or Source Sweep operation modes, if all sensors used in a channel input configuration are in the DEFAULT measurement mode, or if the peakmeter is displayed.

NOTE

When editing an entry in a menu, pressing the CLR key clears the digits. If in a menu screen, pressing the CLR key returns to the previous menu level.

4-16 ML2430A OM

OPERATION TRIGGER MENU

The trigger icons appear as shown in Figure 4-2.

NOTE

External trigger is only effective at 800 KHz or lower.

Setup This menu is used to set up the trigger conditions for the display channels. In

Modulated Average

MOD

Continuous

Manual

Internal A

Internal B

External

Figure 4-2. Trigger Icons

Only when a channel input configuration includes a sensor with a measurement mode that requires an icon, will an icon be displayed.

readout display mode with sensor mode set to custom, the trigger can be set to display channel 1 and 2 separately, or together as channel 1 & 2.

MAN

Rising Edge Falling Edge

INT

TTL TTL

INT

The channels are triggered simultaneously if the trigger conditions are set to 1 &

NOTE

Simultaneous trigger channels guarantee identical sampling for both channels, essen tial for accurate ratio (A/B) measurements.

2. This guarantees the trigger conditions are the same, and therefore the read ings are taken at the same time. In Readout and Power vs. Time modes, if the menu is exited with the trigger selection at channel 1 & 2, this setup is used for trigger control. Otherwise, if the trigger setup display is left with channel 1 or channel 2 displayed, the individual trigger settings are used for trigger control.

CHANNEL

[TRGMODE]

SOURCE

[TRGSRC GTSRC]

Select display channel 1 or 2 (or 1&2 when setting trigger condi tions in Readout or Power vs. Time modes).

The trigger sources are CONTINUOUS, Internal A, Internal B (ML2438A only), EXTTTL, or MANUAL . When the trigger source is set to INT A or INT B (Internal A or B) the power meter triggers on

a rising or falling power level on the associated sensor. See LEVEL for the setting of the trigger power level.

ML2430A OM 4-17

TRIGGER MENU OPERATION

NOTE

The averaging function averages a number of gate WIDTHS, so for a given averaging number, larger WIDTHS will take longer to AVERAGE. Narrower widths will average faster (but may yield a less-settled measurement).

DELAY

[TRGDLY GTDLY]

WIDTH

[TRGGW GTGW]

In Profile mode, DELAY sets the time delay (after the display trigger delay) to when the system starts to take and display readings, rep

resented by the left most cursor. Enter 0.0 to 1.0 seconds, in ms or ms.

NOTE

Changing the left most cursor, or the trigger delay time, up dates the cursor or the delay time value accordingly. In Pro

file mode, moving the cursor only allows updates to the pixel resolution of the display. In Power vs. Time mode, the delay and width can be used to alter the update rate.

In Readout mode (CUSTOM sensor mode), the value entered for DELAY is applied after a trigger event, and before samples are taken. Enter 0.0 to 1.0 seconds, in ms or ms.

Enter 100 ns to 7.0 seconds (the default is 20 ms). In Profile mode, WIDTH is the gate time the system uses to perform a cursor aver

age measurement. The time interval is represented by the space between the left most cursor and the right most cursor. Changing either cursor, or the gate width value, updates both the cursors and the gate width value.

In Readout mode, this value defines the measurement gate width. A measurement is presented as the average of all data taken in this gate width.

In Power vs. Time mode, the delay and width can be used to alter the update rate or sample rate.

NOTE

Use Arming to synchro nize to other equipment or modulation/burst

EDGE

[TRGXTTL GTXTTL]

ARMING

[TRGARM GTARM]

When set to External TTL, the power meter triggers on a TTL level rising or falling. This selection sets the trigger for either a rising or falling edge.

Sets the trigger arming, unless the trigger source is set to EXTTTL. When ARMING is set to Blanking ON, only samples taken when the rear panel Digital Input BNC is active will be averaged in the measurement. The polarity of the rear panel Digital Input BNC sig nal can be set (high or low) using the System|Rear Panel|BNC|TTL LEVEL menu setting.

synchronization. This is a simple way to inhibit measurements during user-defined pe riods without entering

When ARMING is set to Blanking OFF, all samples are read irre spective of the level on this BNC.

Figure 4-3 shows a typical arming diagram.

actual time periods.

4-18 ML2430A OM

OPERATION TRIGGER MENU

-9

dBm

-50

TTL

Figure 4-3. Typical Arming Diagram

TYPE

[TRGTYP GTTYP]

GSM BURST

FROM GENERATOR

BURST TRIGGER SYNC

FROM GENERATOR

1. Connect to the rear panel digital input.

2. Select Trigger|Setup|ARMING|Blanking ON.

3. Set the polarity of the blanking (System menu)

Example power meter reading: –9.16 dBm.

The Type selection (RISE or FALL) sets the trigger for a rising or falling edge. When the trigger source is set to INTA or INTB (Internal A or B) the power meter triggers on a power level which is rising or falling.

NOTE

Effective range is to ap proximately –30 dBm and is only active in DC ranges 1 and 2.

LEVEL

[TRGLVL GTLVL]

The Level selection sets the internal trigger level. When the trigger source is set to either INTA or INTB (internal sensor A or B) the channel triggers on a power level (in dBm) given by the sensor. This value must not take any cal factors or offsets that the meter applies into account.

Trig 1

If Trigger Channel 1 SOURCE is set to Manual, this softkey initiates a measurement for channel 1.

Trig 2

If Trigger Channel 2 SOURCE is set to Manual, this softkey initiates a measurement for channel 2.

Trig 1&2

If Trigger Channels 1 and 2 SOURCE are set to Manual, this softkey triggers both channels simultaneously.

ML2430A OM 4-19

TRIGGER MENU OPERATION

Figure 4-4 shows a typical trigger timing diagram. Note that the display trigger delay is only present when in Profile operation mode, and helps in setting the ‘window’ position along the signal.

PRETRIGGER %

INCOMING SIGNAL FROM SENSOR

DISPLAY TRIGGER DELAY

(PROFILE MODE)

TRIGGER POINT

Figure 4-4. Sample Trigger in Graphic Mode

CURSOR1CURSOR

GATE

WIDTH

DELAY

DATA COLLECTION TIME

(PROFILE MODE)

The Data Collection Time (collection period) is only present when in Pro file operation mode (System|Profile|PERIOD), and is the period of time displayed on the profile graph.

The Gate Width is the section of the signal in which the measurements are performed. In Profile mode, this is the time between Cursor 1 and Cur sor 2 and is used to provide the Between Cursor Average measurement.

Display Trigger Delay (System|Profile|DELAY) is the delay after the trigger point.

NOTE

External trigger is only effective at 800 KHz or lower.

The Pretrigger % (System|Graphics|PRE TRG%) is only used in the Pro file mode, and shows a percentage of the data collection time as Pretrig ger information. If the display trigger delay is less than the pretrigger delay period, there will be no Pretrigger information as it will be before the trig ger point itself.

Setting the display trigger delay to the length of the data pulse causes a trigger on the first pulse, but displays the second pulse with valid “pretrig ger information.” This is the best method for repetitive signals and can be used to verify signal repetition intervals.

4-20 ML2430A OM

OPERATION SYSTEM MENU

4-7

When using the ML2430A Series Power Meter with an MA2499A or MA2499B Sensor Adapter, only Readout and Power vs. Time modes are allowed.

SYSTEM MENU

Setup This menu selects the operation mode, allows system setups to be saved or re

NOTE

The System menus control the operating modes, display visibility, sound, rear panel functions, and battery state of the ML2430A Series Power Meter. Note that the soft keys will appear differently depending upon the operation mode selected with the Setup soft key below.

NOTE

When editing an entry in a menu, pressing the CLR key clears the digits. If in a menu screen, pressing the CLR key returns to the previous menu level.

called, and provides two options to reset the system parameters to the default setup.

MODE

[OPMD]

SAVE

[*SAV SYSLD SYSRD SYSLNM]

RECALL

[*RCL SYSLD SYSRD SYSLNM]

Select between Readout, Power vs. Time, Source Sweep and Pro file operation modes. If only Readout is available, check the Sys tem|Rear Panel|GPIB|Mode setting. This setting must be ML24XX for Profile, Power vs. Time and Source Sweep modes to be available.

Save the current instrument setup in one of 10 memory locations.

Recall a saved instrument setup from one of 10 memory locations.

LINK

[LINK]

There are two trigger conditions saved; one for Profile mode and one for Readout mode. Normally, Profile mode trigger conditions can be changed without affecting the trigger conditions used in Readout mode. With LINK set to ON, the Profile mode trigger con ditions are used for both Profile and Readout modes.

In Profile mode, the user can view what is being measured with the selected trigger conditions, but only over a limited dynamic range, as it only uses the two DC ranges of the signal channel. Profile mode measurement rate is also limited by sweep speed.

ML2430A OM 4-21

SYSTEM MENU OPERATION

With LINK readout/profile trigger set to ON, switching to Readout

NOTE

With LINK set to ON, Readout mode is tem porarily forced to Cus tom mode, and the de fault and Mod Average modes are inhibited. To use these modes, de select LINK.

FAST

mode uses the same trigger conditions, but allows the full dynamic range of the meter to be used, as well as providing full GPIB speed on data acquisition.

When moving between Readout and Profile modes, with LINK en

abled, the value used for “sample delay” is modified using the “display trigger delay.” In Readout mode, the “sample delay” and “display trigger delay” values are combined as “sample delay,” whereas in Profile mode they are both available separately.

Fast recall of a saved instrument setup from one of the 10 memory locations. In FAST system recall mode, a single key press recalls a saved setup. A message across the lower area of the screen will prompt for keypad keys 1-9, or 0, to be pressed to recall setups 1-10 (if saved setup data is available in the selected location). The

-exit- softkey or any other menu key will exit fast recall mode.

Profile This soft key becomes available when the System|Setup|MODE is set to Profile.

NOTE

PERIOD sets the x-axis time.

NOTE

This is Display Trigger Delay in Figure 4-4.

PRESET

Resets the system parameters to the default setup (see Appendix A, Section A-3).

RESET

[*RST]

This selection will reset the system setup. The offset tables and the GPIB interface will not be affected.

FACTORY

[FRST]

This selection will reset the system setup, including the offset tables and GPIB interface.

Profile operation mode includes the following display controls:

CHANNEL

[GRMD]

Select Channel 1 or Channel 2. The channel selected will be dis played on the left of the screen, above the middle value of the y axis and is used for all Profile data displays.

PERIOD

[GRPRD]

Sets the time period over which the system collects data and scales the data into the profile graph after a trigger event. Enter the data collection period in ms or µs. See System|Graphics|Pretrig % to move the t=0 (trigger event position) of the displayed waveform.

DELAY

[DTRGD]

Specifies the period of time after a trigger event to delay the start of the display window. For the trigger to line up with the marked trigger point on repetitive waveforms, the delay period should be either zero, or set to integer multiples of 1/PRF (Pulse Repetition Fre quency). Enter the delay period in ms or µs.

4-22 ML2430A OM

OPERATION SYSTEM MENU

NOTE

Useful for tracking peak levels over a pe riod of time, or detect ing glitches.

Power vs. Time This soft key becomes available when the System|Setup|MODE is set to Power

DATA HOLD

[GRPIX]

This selects how the graph is displayed on the screen. Select from NORMAL, Min&Max, Min, or Max.

NOTE

If either Min&Max, Min, or Max is selected, the display will keep the “old” data and may appear stationary. The DATA HOLD mode in use is displayed on the left of the screen, below the middle value of the y axis.

With Min & Max selected, the minimum and maximum points for each sample are shown. If Connect Points is ON (default) (SYSTEM|Graphics|CONNECT), a vertical bar is drawn between these points. See CLEAR, under CONTROL to restart the process.

Min displays only the minimum for this sample position until reset by returning to NORMAL.

Max displays only the maximum for this sample position until reset by returning to NORMAL.

vs. Time mode. Power vs. Time mode displays measurements in a chart-like format showing history over a period of time. The measurements displayed are taken under the conditions of the Readout mode, and can therefore include all triggering and correction settings set up in that mode.

Power vs. Time operation mode includes the following display control:

CHANNEL

[GRMD]

Select Channel 1 or Channel 2. The channel selected will be dis played on the left of the screen, above the middle value of the y

axis.

DATA HOLD

[GRPIX]

TIME

[GRDDT]

Selects how the graph is displayed on the screen. Select from NORMAL, AVG, Min&Max, Min, or Max.

Sets the data hold time, from 1 minute to 24 hours.

Source sweep This soft key becomes available when the System|Setup|MODE is set to Source

Sweep. The Source Sweep mode provides interconnection between a signal

source/generator and the power meter. Using simple techniques, this can provide swept power-accurate measurements over any frequency range at very high speed. The sweep data is available over GPIB and can provide a simple low cost scalar analyzer function.

ML2430A OM 4-23

SYSTEM MENU OPERATION

Anritsu 68

HORIZ OUT

SEQ SYNC OUT

69000SynthesizedSweepGenerator

10MHz

REFOUT

REFIN

HORIZ

AUXI/O

OUT

SEQ SYNC OUT

EXT ALC IN

DWELL IN

SERIAL

V/GHz

I/O

OUT

CAUTION

>18kg

HEAVYWEIGHT

INPUT

90- 132VAC

180- 264VAC

48- 440Hz

NOTE:USE SLOW BLO FUSES ONLY

220V

2.5A 110V 5A

CAUTION

DONOT OPERATE WITHPOWER CORD

UNGROUNDED

IEEE-488GPIB

Figure 4-5. Source Sweep Mode Interconnection Example

If the source used does not provide a blanking output, the blanking signal may be disabled as follows: select System|Rear Panel|BNC. Select PORT until INPUT 1 (digital) is selected, then select TTL Level to alter the active state of the blanking signal expected. Setting the TTL Level to LOW will allow the Source sweep to progress without a Blanking signal. This is useful for third party sources or simple VTO systems. If a Source Sweep is later selected which does provide a blanking signal, remember to restore the polarity of this signal to HIGH or an incorrect display will result. Operating a source sweep which has BANDSWITCH blanking delays in it without an appropriate blanking signal may lead to glitches in the resulting measurement at the bandswitch points (simple VTO systems do not usually have bandswitch points).

110

220

LINE

SELECT

BNC Cables

ML2430A Series Power Meter

DIGITAL INPUT 1

ANALOG INPUT 2

NOTE

If either Min&Max, Min, or Max is selected, the display will keep the “old” data and may ap pear stationary. The DATA HOLD mode in use is displayed on the left of the screen, below the middle value of the y axis.

Source sweep operation mode includes the following display controls:

CHANNEL

[GRMD]

Select Channel 1 or Channel 2. The channel selected will be dis played on the left of the screen, above the middle value of the y

axis.

DATA HOLD

[GRPIX]

This selects how the graph is displayed on the screen. Select from NORMAL, Min&Max, Min, or Max.

With Min & Max selected, the minimum and maximum points for each sample are shown. If Connect Points is ON (SYSTEM|Graph

ics|CONNECT), a vertical bar is drawn between these points. Min

displays only the minimum for this sample. Max displays only the maximum for this sample.

MODE

[SRCMOD]

START

[SRCSTFRQ SRCSTPWR]

Source sweep mode: FREQUENCY or POWER.

Sweep start frequency (MHz or GHz) or power (dBm)

4-24 ML2430A OM

OPERATION SYSTEM MENU

STOP

[SRCSPFRQ SRCSPPWR]

Control The Control menu adjusts cursor position and toggles the readout display in Pro

file, Power vs. Time and Source Sweep modes, and provides control over display scaling.

SWAP << >>

[CUR]

Sweep stop frequency (MHz or GHz) or power (dBm)

NOTE

When the power meter is communicating with a signal source/generator over the serial interface, if the source fre quency power level or the frequency itself is changed, the source sweep display will be updated where appropriate.

SWAP selects which cursor to move. The presently selected cursor is defined by a triangular marker at the top of the cursor line. Press the << soft key to move the selected cursor left, and the >> soft key to move the selected cursor right. Trigger delay and Gate Width are related to the cursor positions. This feature aids in measurement of pulsed signals. Changing either cursor, or adjusting the Gate width value, updates both the cursors and the gate width value.

When enabled through the System|Sound|CURSOR menu selection, if a cursor is moved into an illegal space such as the edge of the screen or the end of valid data (trigger point on the left of the screen) a warning beep will sound.

SCALE

[GRYT GRYB]

READOUT

[GRDATA GRDRQ]

ACTIVE CURSOR

AVERAGE READING

BETWEEN CURSORS

Figure 4-6. Sample Readout Display, Profile Mode, Data Hold = NORMAL

Adjust the Y-axis of the graph using TOP dB Value and BOTTOM dB Value parameters in the SCALE submenu. AUTO scale is based on the min and max of the previous sweep.

The supplemental data readout is displayed or removed with the READOUT soft key. The readout provides display data depending on the graph mode and the data hold type selected, as shown below.

Profile Mode

Data hold = NORMAL:

1 -10.61 2 -12.63dBdB P

-0.00

-17.41

8.85

dB mS dB

ML2430A OM 4-25

SYSTEM MENU OPERATION

1 cursor 1 reading

2 cursor 2 reading

D P Power difference between cursor 1 and cursor 2

D t Time difference between cursor 1 and cursor 2

AV Between cursor average if ON

Data hold = MIN (or MAX) :

1 cursor 1 minimum reading, or maximum if MAX mode

2 cursor 2 minimum reading, or maximum if MAX mode

D P Power diff between cursor 1 and cursor 2 minimums

(or maximums if MAX mode)

D t Time difference between cursor 1 and cursor 2 minimums

(or maximums if MAX mode)

Data hold = MIN&MAX:

1 cursor 1 MIN reading

cursor 1 MAX reading

2 cursor 2 MIN reading

cursor 2 MAX reading

D t Time difference between cursor 1 and cursor 2

Power vs. Time Mode

Data hold = NORMAL or AVERAGE:

1 cursor 1 reading

2 cursor 2 reading

D P Power difference between cursor 1 and cursor 2

T1 Time at cursor 1

T2 Time at cursor 2

Data hold = MIN (or MAX) :

1 cursor 1 minimum reading, or maximum if MAX mode

2 cursor 2 minimum reading, or maximum if MAX mode

D P Power diff between cursor 1 and cursor 2 minimums

(or maximums if MAX mode)

T1 Time at cursor 1

T2 Time at cursor 2

Data hold = MIN&MAX:

1 cursor 1 MIN reading

cursor 1 MAX reading

2 cursor 2 MIN reading

cursor 2 MAX reading

D t Time difference between cursor 1 and cursor 2

Source Sweep mode

Data hold = NORMAL or AVERAGE:

1 cursor 1 reading

4-26 ML2430A OM

OPERATION SYSTEM MENU

2 cursor 2 reading

D P Power difference between cursor 1 and cursor 2

X1 X axis at cursor 1

X2 X axis at cursor 2

Data hold = MIN (or MAX) :

1 cursor 1 minimum reading, or maximum if MAX mode

2 cursor 2 minimum reading, or maximum if MAX mode

D P Power diff between cursor 1 and cursor 2 minimums

(or maximums if MAX mode)

X1 X axis at cursor 1

X2 X axis at cursor 2

Data hold = MIN&MAX:

1 cursor 1 MIN reading

cursor 1 MAX reading

2 cursor 2 MIN reading

cursor 2 MAX reading

CLEAR

[GPRST]

LINK CURSOR

[CURLK]

HOLD

[HOLD]

AUTO scale

[GRAUTO]

Available in Profile, Source Sweep and Power vs. Time modes when the DATA HOLD representation selection is not set to NORMAL (or AVERAGE for Power vs. Time). Pressing the CLEAR key restarts the min/max collection.

Links the screen cursors in Profile and Power vs. Time modes so that when one is moved, both are moved. When the cursors are linked, a horizontal bar is drawn between them on the screen. If one cursor is moved, the other cursor moves with it to maintain their relative positions and time interval between them. When the cursors are linked, the relative time positions are altered by adjust ing the gate width in the TRIGGER|SETUP|WIDTH submenu.

In Profile, Power vs. Time, and Source Sweep modes the graph HOLD function allows a graph to be held and printed. The key action is a toggle action, with the warning message Graph Display HELD displayed at the top of the screen when HOLD is active. Whenever measurement setup parameters are changed, graph hold will automatically be released.

Auto scale for all graphic modes (Profile, Source Sweep and Power vs. Time). In Profile and Source Sweep modes, auto scale will be based on the min and max of the previous profile or sweep.

Display Controls the characteristics of the LCD display.

BACKLIGHT

[DBLGHT]

Controls the LCD backlight during internal battery operation. Can be ON, OFF, or timed to go off after a specified period to save bat

tery life. The backlight is always on during AC or external DC power operation.

ML2430A OM 4-27

SYSTEM MENU OPERATION

Contrast DOWN

[DCONTD DCONT]

Contrast UP

[DCONTU DCONT]

TIMED

[DBLTIM]

PEAKMETER

[DPEAK]

FREQ

[FROFF]

Reduces the display contrast. Adjust to suit ambient conditions.

Increases the display contrast. Adjust to suit ambient conditions.

Sets the time limit when the backlight will turn off if the BACKLIGHT setting is set to TIMED. Enter a value from 0.0 to 100.0 minutes.

Turns on the peakmeter display for Sensor A, Sensor B, or both Sensors A and B. The peakmeter display will eclipse any trigger icons. The peak meter display range covers 12 dB. When above the displayed maximum or below the displayed minimum, the range is switched by 10 dB in the appropriate direction. Note that in the event that the channel is displaying an alternative measurement (for example, external volts from the rear panel BNC) the peak meter will continue to represent the Sensor A and/or B data. This is useful for monitoring an external voltage on the meter, while peaking up a response being monitored by a sensor, such as RF output.

Turns FREQuency offset display ON or OFF. When ON, a continuous indication of the frequency (used for Cal Factor) is displayed in small text at the top of the display along with any sensor offset (if applied).

TEXT

[TEXT TEXTS]

GPIB user TEXT display ON or OFF. When ON, a user-defined text string can be displayed at the top of the display area. The text string can only be defined over the GPIB.

Sound Controls system sounds.

KEY

[KEYCK]

EDIT

[ENTERR]

LIMIT 1

[FBEEP]

LIMIT 2

[FBEEP]

CURSOR

Turns the audible key click on or off.

Turns the audible edit error tone on or off.

Limit Fail beep on channel 1 on or off.

Limit Fail beep on channel 2 on or off.

CURSOR out of screen beep. If a cursor is moved into an illegal space, such as the edge of the screen or the end of valid data, a warning beep is sounded.

4-28 ML2430A OM

OPERATION SYSTEM MENU

[PRINT]

This selection prints the screen and various operational settings through the rear panel printer port.

ANRITSU Power Meter ML2437A s/n: 97180010

Firmware: 2.02

Sensor A: NOT FITTED

Sensor Measurement Setup

Measurement mode Cal factor Averaging mode & number Low level averaging Offset type & value Settle % per reading Range hold Sensor zeroed

Measurement Channel Setup

Trigger source Trigger sample delay Trigger gate width Trigger arm

A: Default

Frequency (50.00MHz) Auto Low Off

0.10% Off No

1: (A) 2: OFF

Continuous

1.00ms

20.00ms

Blanking OFF

Battery

High limit Low limit Limits test

Readout

Measured value

Figure 4-7. Sample ML2430A Series Printout

Off Off Off

------

Controls battery setup when the optional battery pack is installed.

AUTO

[BAUTS]

Enables or disables the automatic power off feature. Automatic power off can be used to conserve battery power when operating from the internal battery.

TIME

[BAUTT]

When operating from the internal battery, Time sets the number of minutes that the instrument will run before powering off in absence of any key activity. Enter a value of 10 to 240 minutes.

STATUS

Displays the installed battery type, remaining capacity (%), esti mated operating time remaining (minutes), and the battery’s full charge capacity (mAh).

ML2430A OM 4-29

SYSTEM MENU OPERATION

NOTE

Immediately after power-on, the “estimated operating time remaining” displayed may not be genuine, as the battery requires a few minutes to calculate the present rate of dis charge. An accurate indication will be displayed only after a few minutes of continuous operation.

Rear Panel Controls for rear panel connections are located in the Rear Panel submenu.

NOTE

BUFFER Enabled TRUE is the default. Use FALSE when pro gramming simple com mand sequences to read data, and you do not want to bother with decoding status or keeping track of multi ple results or readings.

CHARGE

Available only when the instrument is being powered by AC line power or external DC power greater than 21 volts. This selection starts the battery charging cycle. Note that the instrument will shut down during the charging cycle, and restart automatically when the charging is completed. A series of 10 beeps signals completion of the charge cycle.

GPIB

Sets the GPIB address and emulation modes.

ADDRESS

[ADDR]

Set the GPIB address for the power meter. The default is 13.

MODE

[EMUL]

Selects the power meter emulation mode. Select from ML24XX (native), HP 436A, HP 437B, HP 438A, or ML4803A modes.

BUFFER

[BUFF]

If BUFFER Enabled is TRUE (default): In the ML243X native mode,

488.2 GPIB operation, when a request for data is made the response is put in an output buffer ready to be read by the controller. If another data request is made and the previous data has not been read out of the output buffer; the new data is queued after the origi

nal request. In this mode of operation the GPIB response buffering enable is TRUE, and following the 488.2 specifications, the re

sponse should be read when ever a request for data is made.

If BUFFER Enabled is FALSE: In this mode when ever a request for data is made, (except by serial poll) the output buffer is cleared and

the only data in the output queue will be the response to the last data request made. The output buffer is cleared once a valid GPIB data request command has been recognized.

RS232

Sets the serial communication parameters.

MODE

[RSMODE]

Selects External Communication or Source IF. External Communi

cation allows GPIB type commands to be sent to the power meter over the serial interface from a local computer or a remote com

puter via a modem.

4-30 ML2430A OM

OPERATION SYSTEM MENU

Source IF allows the power meter to communicate with an Anritsu

NOTE

For the power meter to communi cate with Anritsu 68/69000-series synthesizers using Source IF, the synthesizer firmware must be later than the levels shown for the vari ous models below:

Model - firmware level 680xxB - 3.39 681xxB - 3.44 682xxB - 2.41 683xxB - 2.50 680x5B - 1.26 681x5B - 1.32 682x5B - 1.30 683x5B - 1.34 690xxA - 1.21 691xxA - 1.26 692xxA - 1.26 693xxA - 1.35 690x5A - 1.21 691x5A - 1.24 692x5A - 1.24 693x5A - 1.31

Contact your nearest Anritsu Ser vice Center for a firmware upgrade if necessary.

68/69000-series synthesizer when the operation mode is set to Source Sweep.

BAUD

Sets the serial port BAUD rate. Select from 1200, 2400, 4800, 9600 (default), 19200, or 38400. The other RS232 serial parameters are fixed at 8 bits, 1 stop bit, and no parity.

MODEM

This menu controls how a modem will react when the power meter attempts to connect to a remote computer. It allows entry of a PHONE number, redial COUNT and redial DELAY, and permits IN ITialisation of a connected modem.

PHONE number [MODPH] – The phone number can be up to 40 digits. When the number is being dialed, a dot (.) will be inter preted as a 2-second delay in the dialing sequence; a minus sign (–) will be interpreted as wait for another dialing tone.

Redial COUNT [MODRED] – If the dialed number does not connect, because it was not answered or was engaged, then the power meter will try to redial the same number according to the count specified. This has a minimum value of 0, maximum value of 10 and default value of 5.

Redial DELAY [MODDEL] – If the dialed number does not connect, and is to be redialed, this value specifies the delay in minutes before redialing. This has a minimum value of 1 minute, maximum value of 10 minutes and a default value of 5 minutes.

INITialize Modem [MODINIT] – This is a single shot command to reinitialize a connected modem. As at power on, if this command is executed with a PC connected directly to the power meter, then a string of modem commands will be seen by the PC.

[RSBAUD]

AUTO

Sets up the power meter to autodial if there is a LIMITS test failure, sensor RANGE error, or the instrument POWER is cycled.

LIMITS [MODLIM] – If this is set, and the limits fail, then the num ber specified in the “phone number” field will be dialed. Remote communications can then continue as normal.

RANGE [MODRNG] – If this is set, and there is a signal channel range error, then the number specified in the “phone number” field will be dialed. Remote communications can then continue as normal.

ML2430A OM 4-31

SYSTEM MENU OPERATION

POWER [MODPWR] – If this is set, and the power cycles on the meter, then the number specified in the “phone number” field will be dialed. When a connection is established, an SRQ will be sent to the host PC. Remote communications can then continue as normal.

BNC

[OBMD, OBCH, OBVST, OBVSP, OBDST, OBDSP, OBCH, OBPL, OBACM, OBCH, OBZL, IBBLP]

Configures the input and output rear panel BNC connectors.

PORT

Output 1 or 2: Select the output port to configure (see MODE below).

Input 1: Select what type of Blanking input you are providing (see TTL LEVEL below) on Input 1.

Input 2: Selects input 2 for V/GHz or External volts input. You cannot configure the V/GHz or External volts input port here. To configure V/GHz set Sensor|CalFactor|Source to V/GHz. To use the External Volts Input set Channel|Setup|Input to EXT V.

MODE (output ports only)

OFF (output set to ground) port 1 or 2

Analog OUT (analog scaled output) port 1 or 2 provides an output voltage proportional to the measurement.

RF Blanking (output 2 only) provides a logic level output during the ZERO process. This can be used to switch off RF from external sources.

PASS/FAIL port 1 or 2 logic level output

Signal channel A or B (port 1 or port 2) provides a real time output from the signal channel. Being real time, it shows modulation, etc., and is taken after the signal has been through range amplifiers. It is not directly proportional to the measurement.

Leveling A or B (range 1 or 2) (port 1 or 2). This is similar to the sig nal channel A or B outputs, except it connects to range 1 or 2 only of the signal channel. See below for more information on leveling.

4-32 ML2430A OM

OPERATION SYSTEM MENU

ACMod output (port 1 only) is a TTL signal synchronized to the in ternal chopper (when used) of the signal channel. This signal can be used for synchronization with external sources or when viewing AC range (chopped) signals.

Leveling outputs - To allow the power meter to be used in a leveling loop, the sig nal channel output is available on the rear panel. The leveling loop will be broken every time the signal channel autoranges. To overcome this, the outputs of ranges 1 and 2 can be made directly available on the rear panel BNC connector. This feature is only available as a NON DRAWN option. It can be selected from the System|Rear Panel|BNC menu - PORT 1 for sensor A and PORT 2 for sen sor B. Leveling A(1) selects range 1 on sensor A. If the hardware is not available, 0 volts will be set on the appropriate output when selected.

For signal levels below –25 dBm on a diode sensor, the leveling outputs will not be valid as the signal channel operates in chopping mode below this level.

TTL LEVEL (Input port 1 only)

When in Readout or Pwr vs. Time operation mode, this selects the blanking input type, HIGH active or LOW active, you are providing. The blanking input will be used if the Trigger|Setup|ARMING is set to Blanking ON and the Sensor|Setup|Mode is set to Custom.

When in Profile operation Mode, the blanking input is ignored.

Printe r

[PRNSEL]

When in Source Sweep operation Mode, if the Blanking input is set to HIGH, the ML24xxA uses the digital input to sync to. Your sweeper must provide a Sequential Sync output which is connected to the digital input of the meter.

If Blanking input is set to LOW, the ML24xxA does not use the digi tal input and therefore can be connected to a sweeper which does not provide a Sequential Sync output. The ML24xxA will use the Horizontal Ramp input only.

Configures the rear panel printer port. Select from the listed com patible printers which include, but are not limited to, the following:

HP DeskJet 340 Canon BJC80

Other 300, 500, 600 Series and later HP printers are typically compatible.

For proper operation with the ML2430A, the Canon BJC80 printer must be set to the EPSON LQ emulation mode. Refer to the printer manual for instructions on setting the emulation mode.

ML2430A OM 4-33

CAL/ZERO MENU OPERATION

Graphics This menu presents additional graphic display controls:

NOTE

These options allow ei ther the min/max of each sweep to be dis played (single) or the conventional method for tracking variation of levels over an ex tended period of time (infinite).

Secure

[SECURE]

CONNECT

[GRCP]

TRACKING

[GRTMM]

REF LINE

[GRFS]

PRE TRG%

[GRPTP]

Normally OFF. When the system is powered on the ML2430A Series returns to the state it was in when it was powered off. This includes all the offset tables, calibration adjust values, etc. If Secure is set to Clear memory, non-volatile memory is disabled and all stored values are reset to the factory defaults when the system is powered on. As long as this selection is set to Clear memory, the system will load the presets (see Ap pendix A, Section A-3) every time it is turned on.

This control is normally ON and causes the data between samples to be interpolated and lines drawn between sample points. When OFF, the sample points only are displayed as pixels.

The number of scans of graph data between resetting the tracked min and max when in graph mode. Select SINGLE or INFINITE.

Causes a dotted horizontal line to be drawn at the reference point on the graph screen; normally OFF.

Percentage of the screen that displays pretrigger information at the best resolution available. The display shows an ‘x’ marking the trig ger point on the time axis.

Data before the actual trigger event is not available. The trigger ref erence point (x) indicates the active trigger point after the DELAY setting in the System|Profile menu. Providing sufficient delay has been set, the PRE TRG% can be used to move this reference to anywhere on the screen. The amount of valid data displayed before the trigger reference point is dependent on the System|Pro- file|DELAY setting. Also see Figure 4-4, page 4-20.

4-8

Identity

[*IDN, OI]

CAL/ZERO MENU

Zero/Cal This function zeros and then sets the 50 MHz, 0.0 dBm reference of the con

Cal 0 dBm

[CAL]

Zero

[ZERO]

This selection will display the installed firmware version, the instrument serial number, and the instrument type (model number).

The Cal/Zero menu establishes the 0.0 dBm reference calibration and zeroing of the sensors. Refer to Chapter 5 for specific procedures.

nected sensor. In dual sensor systems with both sensors connected, sensor A or B must be selected.

References the connected sensor to 0.0 dBm at 50 MHz. In dual sensor systems with both sensors connected, sensor A or B must be selected.

Zeros the connected sensor. Zeroing a power sensor compensates for noise and thermal EMF of the device under test. It is recommended prior to taking important power readings in the bottom 20 dB of a power sensor’s dynamic range. In dual sensor systems with both sensors connected, sensor A or B must be selected.

4-34 ML2430A OM

OPERATION CAL/ZERO MENU

RF ON/OFF

[RFCAL]

Ext V

[VZERO]

Turns the RF calibrator ON or OFF.

Zeros the rear panel multi-purpose BNC connector used for Volts per GHz con nection (Analog Input). This will calibrate the units to read zero volts on this BNC. During this operation the connector should either not be connected to anything, or should be connected to a 0 Volt source.

The rear panel voltage can be viewed by selecting CHANNEL|INPUT|VOLTS, al though this does not have to be selected in order for the function to operate.

This calibration is non-volatile and does not normally need to be performed. In the case of offsets being introduced by the user’s setup, it is possible to leave the BNC cable connected to zero out system offsets, however the offset zero range is limited to approximately 100 mV.

ML2430A OM 4-35

Chapter 5 Procedures

5-1

5-2

5-3

INTRODUCTION

POWER MEASUREMENT

ZEROING THE SENSOR

This chapter presents some common procedures for use with the ML2430A Series Power Meter. These procedures refer to the ML2430A Series front and rear panel connectors and front panel keys and menus as explained in Chapter 3, Connections, and Chapter 4, Front Panel Op eration. The operator should be familiar with the front and rear panel lay outs and with the use of the keys and menus before attempting these procedures.

To perform a power measurement, follow these steps:

Connect the sensor(s) as described in Chapter 3, Connections.

Configure the meter for the application. Refer to Chapter 4, Front

Panel Operation, for specific configuration options. The simplest operation is obtained with SENSOR|SETUP|MODE set to DEFAULT. Power readings are continuous with the default setting.

q Zero the sensor(s) as described in Section 5-3 (optional).

Calibrate the sensor(s) as described in Section 5-4 (optional).

Measure power.

Zero the sensor before making power measurements, particularly when operating within the lower 20 dB dynamic range of the power sensor. If frequent low level measurements are being made, it is advisable to check the sensor zeroing often and repeat as necessary.

To zero the sensor, connect it to the UUT (Unit Under Test) test port, and remove RF power from the connection to a level 20 dB below the tangen tial noise floor of the power sensor. For –70 to +20dB dual-diode power sensors, this level is less than –100 dBm.

It is preferable to leave the sensor connected to the UUT test port so that ground noise and thermal EMF are zeroed out of the measurement. Alter nately, in order of preference, the sensor can be connected to:

A grounded connector on the UUT,

the ML2430A Series Calibrator connector,

disconnected from any signal source.

When a new sensor is attached, the message SENSOR x NOT ZEROED

(where then reconnected, the message is not displayed.

The sensor can either be zeroed, or zeroed and calibrated in the same operation.

= A or B as appropriate) is displayed. If a sensor is removed and

ML2430A OM 5-1

SENSOR CALIBRATION PROCEDURES

To zero the sensor without calibration, press the Cal/Zero front panel key and the Zero soft key, then select the appropriate sensor.

ML2430A

Cal/Zero Zero Sensor A

Sensor B

Figure 5-1. Sensor Zeroing Key Sequence

5-4

When a Universal Power Sensor with op tion 1 fitted is changed from T-RMS mode to F-CW mode the user should perform a new zero/cal

SENSOR CALIBRATION

NOTE

Note that if only one sensor is connected, the A-B selection is not dis played and the zeroing process begins immediately.

The message changes to SENSOR x ZERO . . . . On successful comple

tion of the zeroing operation, the buzzer sounds. Sensor calibration should be performed next.

If the sensor fails the zeroing operation, the message SENSOR x ZERO fail nxnnn is displayed. The hexadecimal error code ' detailed reason for the failure, which is usually due to excessive RF noise.

The sensors can also be zeroed using the GPIB ZERO command (see Chapter 6, “GPIB Operation”).

Referencing power sensors to the ML2430A Series 50 MHz, 0.0 dBm calibrator is recommended. Sensors should be zeroed before being calibrated, either as a separate operation (Section 5-3) or in conjunction with calibration (Section 5-5).

To reference the sensor, connect the sensor to the ML2430A Series 50

MHz, 0.0 dBm reference output connector labeled CALIBRATOR or an other 50 MHz, 0.0 dBm reference.

When the sensor is first attached, the message SENSOR x NOT ZE ROED (where zeroing procedure described in Section 5-3 to zero the sensor.

To calibrate the sensor after zeroing, press the Cal/Zero front panel key and the Cal 0 dBm soft key, then select the appropriate sensor.

= A or B as appropriate) is displayed. Perform the sensor

nxnnn

' indicates the

ML2430A

Cal/Zero 0 dBm Sensor A

Sensor B

Figure 5-2. Sensor Calibration Key Sequence

Note that if only one sensor is connected, the A-B selection is not dis played and the zeroing process begins immediately.

On successful completion of the calibration operation, the buzzer sounds.

If the sensor fails the calibration operation, the message SENSOR x CAL 0 dBm invalid is displayed.

5-2 ML2430A OM

PROCEDURES SENSOR ZERO/CAL

5-5

SENSOR ZERO/CAL

Any error conditions encountered during calibration, for example the pres ence of extraneous noise or RF signals, will result in an error message on the front panel display.

The sensors can also be calibrated using the GPIB CAL command (see Chapter 6, GPIB Operation).

Sensors must be zeroed before being calibrated. The Zero/Cal function completes both operations in sequence.

To zero and calibrate the sensor, connect the sensor to the ML2430A Se ries 50 MHz, 0.0 dBm reference output connector labeled CALIBRATOR.

When the sensor is first attached, the message SENSOR x NOT ZERO ED (where

Press the Cal/Zero front panel key and the Zero/Cal function key, then se lect the appropriate sensor. The message changes to SENSOR x ZERO . ..Note that the power meter automatically switches the reference calibra tor OFF during the zeroing operation.

ML2430A

Cal/Zero Zero/Cal Sensor A

= A or B as appropriate) is displayed.

Sensor B

5-6

PERFORMANCE VERIFICATION

Figure 5-3. Sensor Zero/Cal Key Sequence

If only one sensor is connected, the A-B selection is not displayed and the zeroing process begins immediately.

On successful completion of the zeroing operation, the calibration process begins.

On successful completion of the calibration operation, the buzzer sounds and the message is cleared.

If the sensor fails either operation, the message SENSOR x ZERO fail nxnnn or Sensor x Cal fail nxnnn is displayed. The hexadecimal error code ' cates the reason for the failure.

The sensors can also be zeroed and calibrated using GPIB commands (see Chapter 6,” GPIB Operation”).

The performance of the Power Meter’s individual signal channel inputs can be verified using an Anritsu ML2419A Range Calibrator. Refer to the

Range Calibrator Operation and Maintenance Manual

instructions.

(10585-00007) for specific

nxnnn

ML2419A

' indi

ML2430A OM 5-3

PRINTER CONNECTION PROCEDURES

5-7

5-8

GPIB remote operation is not available when the ML2430A Series Power Meter is operating from the internal battery.

PRINTER CONNECTION

GPIB REMOTE OPERATION

NOTE

See Chapter 3, Connectors, for the location of the parallel port connector on the rear panel. Connect a parallel printer cable from the ML2430A Series rear panel 25-pin D-sub connector to the printer.

Select System|Print to begin printing. See Chapter 4, Front Panel Operation, for specific printer connector configuration options.

Printing can also be initiated in ML24XXA (native) mode using the GPIB PRINT command (page 6-65).

The ML2430A Series Power Meter can be operated remotely through a General Purpose Interface Bus (GPIB) connection to a host computer/controller. See Chapter 3, Connectors, for the location of the GPIB connector. The GPIB connec tor is configured through the System|Rear Panel|GPIB submenu. See Chapter 4, Front Panel Operation, for specific GPIB connector configuration options that can be set from the front panel. Refer to Chapter 6, GPIB Operation, for a listing of the available GPIB commands.

If the ML2430A Series is addressed, and the Remote Enable and Local Lockout (REM and LLO) lines are not set, the front panel menus are still available, even if the unit is communicating. As long as the ML2430A Series is GPIB addressed, the GPIB status box will be displayed on the front panel whether the remote line is set or not.

If the GPIB box is on the screen and the system is not in a menu screen, and the system is in local mode (menus available), and no GPIB operations are pending, then pressing the CLR key clears the GPIB box off the screen.

5-4 ML2430A OM

PROCEDURES SERIAL REMOTE OPERATION

5-9

SERIAL REMOTE OPERATION

NOTE

Serial interface remote operation is not avail able when the ML2430A Series Power Meter is operat ing from the internal battery.

The ML2430A Series Power Meter can be operated remotely through the rear panel serial connector (See Chapter 3, Connectors, for the location of the serial connector). Whereas GPIB has restrictions on total cable length and cable length between instruments, RS232 serial communication is not as limited. The GPIB can also be prone to electrical interference and is not easily electrically isolated, while RS232 can be isolated using optical couplers. Serial interface remote oper

ation can be useful if the testing is to be done in the presence of high electrical fields and like environments.

While most standard serial cables will suffice, a 9-pin null-modem serial interface cable is available from Anritsu as an optional accessory (part number B41323).

Note that the hardware handshake CTS and RTS lines are used to control the flow of data in and out of the power meter and must be available in the cable as hardware handshaking is always enabled. The DTR and DSR lines are con

nected together within the meter.

The ML2430A Series Power Meter serial connector pinouts are:

PIN SIGNAL

NOT USED

RX data

TX data

DTR handshake signal

signal ground

DSR handshake signal

RTS handshake signal

CTS handshake signal

NOT USED

The serial interface baud rate can be set using the System|Rear panel|RS232 menu selection or the RSBAUD command (page 6-67). Available baud rates are: 1200, 2400, 4800, 9600 (default), 19200, and 38400. Other parameters are pre

defined as: 8 bits, no parity and 1 stop bit and cannot be changed.

Commands are entered as with the GPIB interface, conforming to the command format for the operation (emulation) mode selected. All GPIB commands are sup ported. There are some additional commands, specific to the serial interface, that are prefixed with an exclamation mark (!). In the emulation modes, when running under GPIB, the measured data is always available when the meter has been ad dressed to talk. In serial mode, the meter cannot be addressed to talk, but mea

surement data can still be obtained by using the GPIB trigger commands TR1 and TR2 in the HP 437 and HP 438 emulation modes, and T and I in the HP 436 emulation mode. All GPIB type commands and command strings should be ter

minated with a new line character (0A hex). The special serial mode commands do NOT require a termination character.

ML2430A OM 5-5

RS232 MODEM SUPPORT PROCEDURES

NOTE

It is recommended that there is only one serial command in each com mand string. Terminate each command with a newline character.

5-10

RS232 MODEM SUPPORT

NOTE

Requested data is returned in the same format as with GPIB, but with a preced ing 'R' and a terminating new line character. SRQs are available, and are output as SRQ message 'S' followed by a terminating new line character. When the SRQ message has been received, an "!SPL" command (equivalent to the GPIB serial poll) can be issued. The power meter will respond with the serial poll data message which is a single character preceded by 'P' and terminated by a new line character.

A device clear message !DCL can be sent to clear the power meter input and output message queues, and terminate any GPIB or serial actions pending.

At power on, factory reset, in response to the MODINIT command, and after the INIT key in the modem menu is pressed, the following sequences will be output:

1. +++ath\r\r

2. at&h1&r2x4v1q0f1s0=1e0\r\r

There will be a delay between the two sequences.

These sequences will initialize an attached Hayes-compatible modem. This is the only type of modem supported.

The ML2430A Series Power Meter can be operated remotely through a modem connected to the rear panel serial connector (See Chapter 3, Connectors, for the location of the serial connector) using the GPIB/RS232 command set. The menu selection System|Rear panel|RS232|MODE must be set to EXT COMMS.

Serial interface remote operation is not avail able when the ML2430A Series Power Meter is operat ing from the internal battery.

To initiate communications with the power meter from a remote computer, com

munications must be established between the two modems. Once this is done, the modems become transparent to the user, and GPIB/RS232 commands can be entered as if the power meter is connected directly to the remote computer.

The power meter can also be configured to automatically dial a specified number if one or more predetermined error conditions are met.

When an instrument state change occurs that initiates an AUTODIAL sequence, the power meter will send an escape sequence "+++" to the modem. It will then output commands to determine if there is a modem connected and, if there is, whether it is connected through to another modem. If a modem is found and it is not connected to a remote modem, the power meter will dial the number speci fied in the "phone number" field. When the connection to the remote computer is established, the power meter will send the serial SRQ message.

When an autodial sequence is initiated, different sets of characters will be seen on the remote PC depending on what is connected to the power meter serial port.

5-6 ML2430A OM

PROCEDURES RS232 MODEM SUPPORT

Connected Device Character Seque nce

Computer connected directly "+++at\r\rS\n"

Modem offline from phone network Sequence will be seen if remote connection established

Modem connected through to remote com puter

modem status data followed by "S\n"

"+++S\n"

GPIB/RS232 Modem

Commands

The following table lists the GPIB/RS232 Modem Commands and the special se rial interface only commands:

Command Parameter Definition

!BYE RS232-type command only, allows the remote PC to

instruct the power meter to tell its local modem to hang-up. This ensures that when communication is completed, the modems at both ends of the line can be disconnected and the telephone line released.

!DCL RS232 type command only. Clears all buffered

GPIB/RS232 messages waiting to be processed. Clears all buffered GPIB/RS232 data waiting to be output. Stops any pending actions.

!SPL RS232 type command only. Allows a GPIB type se-

rial poll to be requested in response to an SRQ from the power meter. This will return the instrument status register and clear the SRQ bit within that register. The *CLS command should be used to clear the rest of the register.

MODDEL <value> Modem redial delay time, 1 to 10 minutes (default =

5 min.)

MODINIT Initialize connected modem

MODLIM <TRUE|FALSE> Autodial enable for limits failure

MODPH <string> Phone number - up to 40 characters

MODPWR <TRUE|FALSE> Autodial enable for power on

MODRED <value> Modem redial count, 0 to 10 (default = 5)

MODRNG <TRUE|FALSE> Autodial enable for range failure

The RS232-type commands (!BYE, !SPL and !DCL) do NOT require terminating. All other commands or command strings require a new line character to terminate.

Refer to Section 4-7, System Menu, for information on using the front panel menus to configure modem operation. Refer to Section 6-10, ML24XX Native GPIB Commands, for information on using GPIB commands to configure modem operation.

ML2430A OM 5-7

RS232 MODEM SUPPORT PROCEDURES

Modem Compatibility and

Commands

Serial Interface

Remote Operation

Example

The ML2430A Series Power Meter firmware supports Hayes-compatible mo

dems. The commands used are as follows:

Command Definition

+++ modem escape sequence

atz reset modem to factory defaults

at&h1&r2x4v1q0f1s0=1e0 initialize modem for power meter use

atd”number” dial “number”

This section presents an example of Autodial using a terminal emulator on a re mote computer ( \n = newline, \r = carriage return).

Initialize local modem, using the same setup as the power meter:

at&h1&r2x4v1q0f1s0=1e0\r &h1 &r2 x4 v1 q0 f1 s0=1 e0

transmit data flow control - use CTS

receive data flow control - use RTS

full result code setting

result codes in verbal mode

result codes displayed

local data echo OFF

auto answer after 1 ring

local command echo off

The modem should respond:

OK\n\r

Dial power meter:

atd<phone number>\r

When the modem finally connects to the power meter modem, the response will be:

CONNECT\n\r

There might be additional information after “CONNECT” but before the line termination characters.

3. The remote computer is now connected to the power meter. The power meter can now

be asked to identify itself:

*IDN?\n

The response from an ML2438A operating in native mode will be:

RANRITSU,ML2438A,<serial number>,<firmware version>

5-8 ML2430A OM

PROCEDURES RS232 MODEM SUPPORT

4. To set a limit for channel 1 and to have the power meter autodial a remote computer when this limit fails, send the following sequence:

LLIM 1,-12DBM LLIMS 1,ON MODLIM ON MODPH <phone number> MODRED 3 MODDEL 2

Sets low limit on channel 1 to -12dBm

Turn low limit testing ON for channel 1

Set meter to autodial when any limits fail

Set phone number to be auto-dialed

Set redial count to 3

Set delay between each attempt to dial to 2 min.

5. Disconnect from power meter and wait for limit failure:

!BYE

Instruct power meter to hang-up its modem

Wait at least 1 second.

+++

wait at least another second.

The local modem will now respond:

OK\n\r

The local modem can now be told to hang up using the command:

ATH0\r

Again the local modem will respond

OK\n\r

6. When a limits failure occurs, the power meter will instruct its modem to dial the previously set up phone number. As the connection is being established through to the remote computer, a sequence of status messages will be reported by the modem to the computer, ending with a final message of:

CONNECT\n\r

There might be additional information after “CONNECT” but before the line termi nation characters.

7. After connection has been established, the power meter will send an SRQ to the remote computer. The SRQ message is:

S\n

To determine what has caused the SRQ, the status register in the power meter must be read. The status register in the meter is an 8-bit register. There are two ways to do this.

ML2430A OM 5-9

PROFILE OPERATION MODE PROCEDURES

a. Read the status register using the equivalent of a GPIB serial poll. Send the message:

!SPL

Note: There is NO terminator to this message.

The power meter will respond:

Px\n

x is the ASCII character determined by the value in the meter status register.

x = “B” gives a status register value of 01000010 binary. Comparing this with the status byte description in Section 6-7 of the manual will show that the SRQ and limits error bits are both set.

b. Alternatively the status register can be read directly using the command:

*STB?\n

5-11

PROFILE OPERATION MODE

This will respond:

Ry\n

y can be up to 3 digits and is the decimal representation of the status register.

y="66" gives a status register value of 01000010 binary. Comparing this with the status byte description in section 6-7 of the manual will show that the SRQ and limits error bits are both set.

8. Once the status register has been read, it must be cleared to allow further SRQ messages to be sent. Before the status register is cleared, further autodial actions (limits failure or sensor range error) should be disabled to prevent any un necessary autodial attempts by the meter when already connected to a remote PC. To clear the status register, use the command:

*CLS\n

The ML2430A Series Power Meter can be used to view signals in Profile, Read out, Power vs. Time and Source Sweep modes. This section describes setting up and viewing signals in the Profile mode. Profile mode allows the viewing of a sin gle channel (1 or 2 as set up in the Channel menu) plotted against time.

5-10 ML2430A OM

PROCEDURES PROFILE OPERATION MODE

To view the time profile of a signal, enter the PROFILE mode via

NOTE

To operate the Univer sal power sensors in profile mode Option 1 must be fitted. Activate option 1 mode before selecting profile mode under the SENSOR | Setup OPTION FAST CW menu.

NOTE

Dynamic range is limited in Profile mode to DC ranges only. For maximum dynamic range, measured signals need to be repetitive (not single-shot) when profiling over less than 30ms width. Above this, single-shot profiles can be mea sured over the full dy namic range.

SYSTEM|SETUP|MODE (toggles through READOUT, PROFILE and POWER vs. TIME ). Parameters needed to set up a PROFILE display are:

1. TRIGGER|SETUP provides access to a special TRIGGER configura tion options. The default mode is CONTINUOUS which provides for a non-synchronized, oscilloscope type display. This type of display is useful for general monitoring of a signal and showing its variation over time. The settings for the DELAY and gate WIDTH provide the points at which the measurement is triggered and read out of the cursor. The other options are similar to other triggering modes.

2. SYSTEM|PROFILE sets up the channel (1 or 2 ) to be displayed and the time-axis, as well as the way that the data is displayed (for exam ple, monitoring the minimum or maximum data over time). Note that in all cases, the PROFILE|CHANNEL selection (1 or 2 ) relates to a measurement channel set up in the CHANNEL menu, not directly to the A or B sensors.

NOTE

If the DATA HOLD mode is set to display min or max data, as opposed to the default (NORMAL), the display will continue to track the min/max until the DATA HOLD mode is returned to NORMAL.

3. SYSTEM|CONTROL provides control over the readout and CURSORs as well as the scaling of the display. From the CURSOR menu (using the << and >> arrows) the positions of the readout cursors can be ad justed. The cursors directly relate to the DELAY and gate WIDTH pa rameters in the TRIGGER|SETUP menu, but allow for visual move ment of the parameters on the display itself. The TRIGGER|SETUP menu requires direct entry of the actual parameters when the timing criteria is known.

TYPICAL SETUP A typical situation with no triggering (CONTINUOUS):

1. Select SYSTEM|SETUP|PRESET to reset the instrument to the standard de fault conditions (see Appendix A, Section A-3 for a listing of the system defaults).

2. Connect sensor A to the signal source.

3. Select SYSTEM|SETUP and press MODE to select PROFILE.

4. Press CLR or any other menu key to return to the display screen. The display now shows a power profile of sensor A on channel 1.

5. Press SYSTEM|CONTROL to get access to the cursor. Press << and >> to move the selected cursor, and SWAP to select the other cursor.

ML2430A OM 5-11

PROFILE OPERATION MODE PROCEDURES

NOTE

With a CONTINUOUS trigger such as this, there will most likely not be specific points of interest, so the movement of the cursors is rather arbitrary. If modulation is applied to the signal, or its power level al tered, the signal should change on the display. The signal may not be visible if it is not in the default range which covers +20 to –50 dBm.

SCALING In the example above, if the measured power signal is not visible because the

power is too high or low, the scaling can be altered as follows:

1. Press SYSTEM|CONTROL|more|SCALE. There are now soft keys for TOP and BOTTOM dB levels, referring to the top and bottom of the screen, and AUTO SCALE, which will optimize the displayed graph.

2. Enter new values so that the measured power signal is visible. The TOP value must always be higher than the BOTTOM value.

3. When finished, press another soft key or CLR to return to the display.

CURSOR READOUT To display the CURSOR READOUT box on the screen, press

SYSTEM|CONTROL|more|READOUT (see page 4-25). This is a toggle action and will display or remove the cursor data readout box from the display.

The readout shows a digital representation of data at the two cursor positions on the currently displayed channel, along with the differences in power (D p) and time (D t). The value of D p represents the selected cursor reading minus the other cursor reading, and D t represents the time difference between the two cur sors. If SENSOR|AVERAGING|between CURSOR averaging is on, the average reading between the cursors is displayed at the bottom of the readout.

NOTE

If continuous trigger is selected, or the display is changing while trying to read the readout, select TRIGGER|MAN UAL to stop the display update. The readouts are updated whenever the signal trace is updated, or if the cursors are moved. It is possible to link the movement of the cursors so they move at the same time. This is useful if measurements need to be taken at specific times between the cursors, as with channeled signals.

To link the cursors, select SYSTEM|CON TROL|more|more|LINK CURSR. When the cursors are linked, a line is drawn on the display connecting the two cursors and they will move together as one. This is dis

5-12 ML2430A OM

PROCEDURES PROFILE OPERATION MODE

cussed more fully in the Triggered Measurements section below.

Triggered

Measurements

Range Hold may be selected (see page 4-6) to limit dy namic range and prevent small range change distur bances on very high speed signals. Use Range Hold 1 for measurements down to –25 dBm, and Range Hold 2 up to –25. If the display update is turned off via GPIB, only the average is updated.

Since non-triggered measurements are of limited use in the PROFILE mode, most applications require triggering. For example:

1. Provide a 1 kHz square wave modulated signal to sensor A, and set TRIGGER|SETUP|MODE to Internal A (Int A). This causes the PROFILE sweep to wait until a certain power level is present on the sensor before starting the sweep.

2. The DELAY and WIDTH parameters, as discussed above, are the positions of the two CURSORS. These can be set to specific locations; for example, if the signal is a 1 kHz square wave, setting the DELAY to 250 µs places the cursor in the first cycle at the midpoint of one of the phases. Setting the WIDTH to 500 µs sets the other CURSOR to exactly one half-cycle later, thus allowing display of the power levels in the two phases of the signal.

NOTE

If the modulation is turned off, then the trigger conditions will not be met and the sweep will not continue to be updated. This is useful to ‘freeze’ a display. To display a CW signal again, re-select CONTINUOUS trigger in TRIG GER|SETUP|MODE.

In some conditions, it is useful to view triggered signals independent of signal levels. In these cases, provide an external trigger source into the rear panel TRIGGER input to trigger such a measurement.

3. The dynamic range in PROFILE mode should extend to the maximum specifi cation of the meter, to approximately –40 dBm (diode sensors only). If the dis played range is restricted, check that RANGE HOLD is not applied.

NOTE

If RANGE HOLD 1 is applied, the lower limit will be ap proximately –30 dBm. If RANGE HOLD 2 is applied, the maximum level will be limited to approximately –10 dBm. In most triggered situations, range hold should be set to AUTO.

ML2430A OM 5-13

PROFILE OPERATION MODE PROCEDURES

The unique method of range changing applied in this mode means that the change between range 1 and 2 is effected in less than 2 ms. In most cases it is not notice able, although there may be a slight discontinuity.

Due to the range-change method, if a triggered signal is not repetitive the range change may not settle instantly, and the displayed result may be in error. This is generally true for x-axis times of less than 6 ms where it takes more than one pass to completely update the display.

Control of

x-axis - Width of

Profile - Sample Time

The control of the time-frames over which the PROFILE is gathered is very pre cise, but there are certain restrictions. With care it can be used to display the pro file of signals down to typically 100 ms or better.

1. Select SYSTEM|PROFILE. The first two items in the menus have already been covered (selection of channel 1 or 2, and the method of display, min max). The last two selections control the data collection PERIOD (the time span of the win dow). The default period is 10 ms, and it can be adjusted down to 100 ms and below. If you are still displaying the 1 kHz square wave, enter a period of 3 ms. The display will zoom in to show more detail of the pulses.

NOTE

Thermal sensors have rise and fall times of <4 ms. Do not use a thermal sensor for fast signal profiles.

Typical MA2470A and MA2440A Series sensors have rise times of <4 ms. Fall time is typically <10 ms, except at low power levels. Consider this when looking at fast signals.

2. Note that the cursors have remained at their set positions in time, that is, when altering the time axis the cursors stay at their set positions in terms of time - NOT POSITION ON THE SCREEN. This is very important when measuring specific points or peaks in a signal.

3. By altering the DELAY parameter, the PROFILE can be made to look at a seg ment of time long after or very close to the trigger point. That is, by setting the DELAY to 100 ms, the PROFILE will show the 100th pulse (and onwards) of a 1 kHz square wave. By setting to ZERO, the profile will show data immediately after the trigger has occurred. This is the DISPLAY TRIGGER DELAY and is denoted by a small ‘x’ on the PROFILE display. This marks the point on the display where data is taken at the time DISPLAY TRIGGER DELAY is placed. For example, for the 1 kHz square wave, the pulse edge would occur at the ‘x’ point whenever the DISPLAY TRIGGER DELAY is a multiple of 1 ms. The x-axis nomenclature al ways denotes this point with a time of ZERO (t=0), this allows the user to always consider time intervals relative to the display trigger which is usually the point of interest.

5-14 ML2430A OM

PROCEDURES PROFILE OPERATION MODE

NOTE

For smaller values of display trigger delay, it is possible that the display will cover time intervals (on the left of the display) for which there is no data. In these conditions, the cursors are normally prevented from displaying data taken there as it will be in error (there is no data). The position of ‘x’ is nominally 10% of the screen. This can be altered to any percentage the user requires in the SYSTEM|more|more|GRAPHICS preferences menu as the PRETRIGGER percentage. It can also be set to ZERO to remove pretrigger data and prevent confusion in cases of small display trigger delays. Profile can display A, B, or A–B measurements. Note that in the case of a ratioed measurement (A–B), the data is calculated as a straight dB difference (not a LINEAR mw difference). This is not the same as a MODULATED POWER AVERAGE measurement.

Advanced Triggering

and Setup Options

4. As well as the CURSOR readouts described above, the POWER AVERAGE method can be used to display the average power between the two cursors. This is performed as a TRUE AVERAGE and is the actual average of all the data points between and including the cursors. By placing the cursors on the top of a pulse, the flat top power can be measured. By placing the cursors with a period of the pulse, the average power of the pulse is calculated. This is more accurate than a simple duty cycle calculation which makes assumptions about the pulse shape. Use the SENSOR|AVERAGE menu to enable this readout method.

NOTE

The display resolution is 200 pixels. Consider this effect on the resolution of timing data. For example, a 1 millisecond PROFILE window would have a cursor resolu tion on the display of 5 microseconds. The LIMITS test functions on PROFILE data, and can be configured to BEEP on fail conditions.

The other aspects of triggering allow for fine tuning of the trigger conditions. This includes:

1. Selection of HIGH or LOW going edge in External TTL.

2. Level setting on Internal A or B trigger, as well as polarity - HIGH or LOW going.

3. ARMING via an External BLANKING input. When ARMING is set to Blanking ON, only samples taken when the rear panel Digital Input BNC is active will be averaged in the measurement. The polarity of the rear panel Digital Input BNC signal can be set (high or low) using the System|Rear Panel|BNC|TTL LEVEL menu setting. When ARMING is set to Blanking OFF, all samples are read.

4. In the SYSTEM|more|more|GRAPHICS menu, there are options for:

ML2430A OM 5-15

SOURCE SWEEP MODE PROCEDURES

(a) CONNECT points. With this ON (default) the data points are connected with vectors to resemble a real time trace. When OFF, the data points are displayed as data points only, with no connecting line. This can give a faster display update, however, it may be confusing as near vertical lines will have very few points de fined within them.

(b) If Tracking min/max is selected for the CHANNEL being used for the PROFILE, it is possible to configure the tracking min/max to display the min and max values for all the data BETWEEN THE CURSORS. This provides easy ac cess to peak values within a time-window; for example, the top of a pulse.

When set to SINGLE it is updated EACH SWEEP and reflects the min and max values only within that sweep.

When set to INFINITE, it maintains the min/max from the point it is started until it is reset, updating the MAX if it sees a HIGHER measurement within the CURSOR window, and updating the MIN readout if or when it sees a lower value than that which it has already. This option, in the SYSTEM menu, is only a prefer ences option and not the main control for the feature.

5-12

SOURCE SWEEP MODE

The control for the min/max remains in the CHANNEL menu (CHANNEL|SETUP|-more-|MIN/MAX |RESET). The user should select the way he wants to work and leave it. In most cases the SINGLE (default) is the most useful as it provides a continuously updated readout of the min and max points within the cursor window. The INFINITE setting is used when the results need to be collated over a large number of samples. In order to RESET the INFINITE configuration, use the CHANNEL menu.

NOTE

In the triggered modes, such as Internal A or B and Ex ternal TTL, the SENSOR|SETUP|Range HOLD feature can still be applied to restrict dynamic range if required.

This feature allows the ML2430A Series Power Meter to be synchronized to an RF source using the Horizontal ramp (to Analog Input) output on the RF source. The ML2430A Series can also optionally use a Sequential Sync (to Digital Input) output on the RF source.

To enable the Seq Sync input for RF sources that do provide this output (the de fault), set the System|Rear Panel|BNC|Input Port 1|TTL LEVEL to HIGH. This way the device will use both the Horizontal Ramp and Seq Sync inputs to sync to the sweep.

To disable the Seq Sync input for RF sources that do not provide this output, set the System|Rear Panel|BNC|Input Port 1|TTL LEVEL to LOW. This way the de vice will only use the Horizontal Ramp to sync to the sweep.

5-16 ML2430A OM

PROCEDURES SOURCE SWEEP MODE

Frequency Sweep

Mode

Power Sweep Mode In this mode the Ramp input is scaled to Start and Stop power settings. The start

When the sensor/cal factor source is set to V/GHz in Source Sweep mode, the start and stop voltages are assumed to be 0 and 10V, and the start and stop fre quencies are taken from the System|Source sweep menu.

Calibrate the V/GHz setup by setting 0 and 10v and the frequencies (F1 and F2) that these voltages correspond to (sweep width). This method activates real-time cal factor correction on a swept basis (including any user cal factor tables) provid ing swept power measurements. Note that V/GHz output should not be used, as this limits the range of the signal applied to the meter when sweeping narrow widths. The fixed 0-10V ramp should be used to ensure correct sweep operation.

In normal operation, leave the CalFactor|SOURCE set to V/GHz as this instructs the meter to apply cal factor correction proportional to the input ramp, and en sures that the whole sweep of data is cal factor corrected in real time at every data point. If the CalFactor|Source is set to Manual or Frequency, a single fre quency cal factor will be applied through the sweep (or a manually entered value). This may be useful for some applications where the sweep signal is used for others purposes (for example, power sweep, etc.).

and stop voltages are assumed to be 0 and 10V, and the start and stop power settings are taken from the System|Source sweep menu.

Make sure the Sensor|CalFactor|SOURCE is set to Frequency or Manual.In power sweep mode V/GHZ is not used.

Source Sweep Graph The annotation at the bottom of the screen is manually entered (there is currently

no digital connection between the power meter and the source), and these can be entered through the SYSTEM|Source sweep|-more- Start and Stop softkeys. Note that the scaling for the 10V ramp input is not directly applied to the bottom of the screen; the user is able to enter this directly and may include effects of fre quency translation devices.

The other controls remain similar to the Profile graphic mode. SYSTEM|Control provides access to most other functions used during measurement, such as CURSOR movement and control, SCALING, and READOUT from the cursor. Note that the “between cursor average” has no meaning in Source Sweep mode, and in place of this the frequency of the measurement is indicated instead (x1 and x2). The readout is only updated while the system is sweeping.

Averaging may be applied by selecting SENSOR|Averaging and setting the STATE to ON. An averaging number may then be applied for either sensor inde pendently. Averaging is ‘EXPONENTIAL’ in character so changes in response (for example, adjusting tuning of a filter) will gradually settle to their final measure ment value over a period of time. A larger number will take longer to settle. Good measurements may be achieved down to –45 dBm (65 dB dynamic range) with an average value as low as 4. Values up to 64 and higher produce significantly lower noise readings. All averaging is performed on a true linear basis.

ML2430A OM 5-17

POWER vs. TIME MODE PROCEDURES

System|Source Sweep|Data Hold can be used to select the way in which data is plotted. Using Min/Max variation (both minimum and maximum) can be shown on the display. Using Max effectively provides a peak hold. If the display of swept power is not what is expected, check the setting of AVERAGE and the DATA HOLD mode in case it is affecting the data processing.

NOTE

Using the Anritsu

68/69000 Synthesizer

As with other graphic modes, improved speed can be achieved in ATE sys tems by disabling the graphic draw function for the LCD through the menus using SYSTEM|-more-|-more-|Graphics|CONNECT. Setting CONNECT to OFF displaces the line-drawing between samples, and improves update rate. Similarly, for ATE systems, the READOUT should be disabled for fast est throughput as this can all be handled within the controller (PC). Sensor range hold is not available in this mode of operation as auto ranging is selected.

The ML2430A Series can be connected directly to the Anritsu 68/69000-Series Synthesized Signal Generators (models 68XXXB and 69XXXA) using a special RS232 cable (Anritsu part number C37399). To use this remote connection, the

System|Setup mode must be set to Source sweep, and the System|Rear panel|RS232 mode must be set to SOURCE IF. The RS232 mode can also be

changed using the GPIB command RSMODE (page 6-68).

When set up in this manner, all sweep frequency and power parameters will be communicated from the source to the meter. If the source frequency power level or the frequency itself is changed, the source sweep display will be updated where appropriate.

To communicate with an Anritsu 68/69000-series synthesizers, the synthesizer firmware must be later than the levels shown below for each model: 680xxB - 3.39, 681xxB - 3.44, 682xxB - 2.41, 683xxB - 2.50, 680x5B - 1.26, 681x5B - 1.32, 682x5B - 1.30, 683x5B - 1.34, 690xxA - 1.21, 691xxA - 1.26, 692xxA - 1.26, 693xxA - 1.35, 690x5A - 1.21, 691x5A - 1.24, 692x5A - 1.24, 693x5A - 1.31

Contact your nearest Anritsu Service Center for a firmware upgrade if necessary.

5-13

POWER vs. TIME MODE

The ML2430A Series Power vs. Time mode is a graphical chart display of one of the display channels, as selected in the SYSTEM|PWRvsTIME menu. The trig gering setup is as set for Readout mode operation.

Power vs. Time mode provides a chart display on a timed basis where the x-axis of the graph is defined in units of time. The user specifies the sweep period and, within this sweep period, each pixel depicts all the measurements taken within a 200th of the sweep period.

5-18 ML2430A OM

PROCEDURES USER CAL FACTORS

5-14

This feature is also available when using Anritsu MA4700A/ MA4600A sensors with the Anritsu MA2499B Sensor Adapter. Since the MA4700A/ MA4600A sensors do not contain an EEPROM, the user cal factors are stored in the MA2499B adapter EEPROM.

USER CAL FACTORS

NOTE

The data can be displayed as a maximum value only, a minimum value only, max imum and minimum values, the average of all the readings during the time slot period, or the latest measured value. These display modes are selected in the SYSTEM|PwrVsTime menu, DATA HOLD representation. Measurement setup, i.e., trigger, etc., is selected the same way as in Readout mode. The minimum sweep time is 1 minute, and the maximum sweep time is 24 hours.

All MA24XXA Power Sensors have an internal EEPROM containing correction and calibration factors programmed into the sensor at the factory. This “cal factor” data is used when the power meter is set up to use frequency or volts per GHz calibration factors. The correction is in linearity (across the dynamic range) and sensitivity (across frequency).

The ML2430A Series has the capability to define sets of calibration factor data and store them in the sensor. A user-defined cal factor table can be used on its own, or in conjunction with the factory-defined cal factor table. Linearity correction is not affected provided the meter cal factor frequency is set correctly.

Depending on the amount of factory calibration data stored in the sensor, there can be up to 10 user-defined cal factor tables. A “user” cal factor table consists of up to 90 frequency/cal factor data pairs for sensors up to 40 GHz or 110 frequency/cal factor data pairs for sensors up to 50 GHz, plus a 7-character identity text string. User cal factor tables are fully interpolated, and can be used to apply correction for attenuators placed in front of the sensor. In this situation, determine the attenuation factors and use them in addition to the Factory cal factors. The number of frequency/cal factor data pairs in the factory defined table depends on the sensor being used.

NOTE

A * in the displayed sta tus box by the Cal Fac tor indicator, signifies User Cal Factors are active.

User Cal Factors are maintained in the sen sor.

The cal factor tables for a particular sensor are not maintained by the meter, but are held in the sensor. This means that when moving a sensor (perhaps with an associated attenuator or calibration record) from one meter to another, the cali bration stays valid. It is not necessary to re-setup the new meter.

The first time a sensor is used with the ML2430A Series, a slight delay may be experienced when the sensor is first plugged in. This is caused by the firmware preparing the sensor to accept user cal factor tables. After first initialization, user cal factor tables will have only a single entry at 50 MHz, 100%.

ML2430A OM 5-19

USER CAL FACTORS PROCEDURES

Cal factor tables are accessed through the Sensor|CalFactor|USE TABLE front panel menus (Chapter 4), or through GPIB commands (Chapter 6).

ML2430A

Sensor CalFactor -more-

USE TABLE %/dB EDIT

Figure 5-4. Cal Factor Table Key Sequence

Example Procedure

Readout Mode In Readout mode, the bottom text line in the Status box indicates what type of

Use the key sequence Sensor|Cal Factor|EDIT to get to the table edit menu. Use the TABLE key to select the table, then the EDIT key to edit that table. Press the INSERT key to enter frequency and cal factor data pairs.

For example, in order to enter the frequency/cal factor pairs 1 GHz @ 100%, 2 GHz @ 101%, 3 GHz @ 98% and 4 GHz @ 98%, step through the keys in the following sequence:

FREQ, 1, GHz.Entr FACTOR, 100, % FREQ, 2, GHz. Entr FACTOR, 101, % FREQ, 3, GHz. Entr FACTOR, 98, % FREQ, 4, GHz. Entr DONE

The frequency/cal factor pairs can be entered in any order. Each time a new fre quency is entered, a new data pair is formed. As the data pairs are entered, they are sorted into frequency ascending order.

calibration factors are being used. At any time, if anything other than the factory supplied cal data is applied, the Status box display shows a warning ‘*’ sign on the Cal Factor line to show that non-standard calibration is being applied. For example:

CAL F = frequency cal factors using factory defined table CAL V = volts per GHz cal factors using factory defined table CAL M = manual cal factor CAL *F = frequency cal factors employing a user defined table CAL *V = volts per GHz cal factors employing a user defined table

This is because the application of user cal factors can completely change the calibrated response of the Sensor.

5-20 ML2430A OM

PROCEDURES OPTIMIZING READINGS

5-15

OPTIMIZING READINGS

This section presents information on how to get the fastest readings from the ML2430A Series power meter when operating under GPIB control. Refer to Chapter 6, GPIB Operation, for specific command descriptions.

Measurement speed depends greatly on the type of measurements being taken, the power level, and the amount of settling used.

NOTES

All results shown in this section are from DOS programs running on a 200 MHz controller using IEEE 488.2 GPIB function calls. The timings (readings/second) presented in this section are for illustrative purposes only.

Using the default system set up (system preset), the “O 1” (page 6-57) command is used to retrieve one reading from channel 1 ten times (channel 1 = Sensor A).

C code example:

/* Reset the unit */ Send(0, 13, “*RST”, 4L, NLend);

/* Ask for 10 readings */ for(i=0; i<10; i++) {

Send(0, 13, “O 1”, 3L, NLend); Receive(0, 13, buffer[i], 20, STOPend);

}

Settling (%) Power Level (dBm) Readings/Second

0.1 0 150

0.1 –30 150

10.0 –30 150

There are, however, methods of improving the speed of the measurement without having to change the power level or settling time.

DISP

ON/OFF

Using the DISP command (page 6-33), the readout display can be turned OFF, yet data can still be acquired from the readout channels.

command

C code example:

/* turn display off */ Send(0, 13, “DISP OFF”, 8L, NLend);

/*Ask for 10 readings */ for(i=0; i<10; i++)

{

ML2430A OM 5-21

OPTIMIZING READINGS PROCEDURES

Send(0, 13, “O 1”, 3L, NLend); Receive(0, 13, buffer[i], 20, STOPend);

}

Settling (%) Power Level (dBm) Readings/Second

0.1 0 160

0.1 –30 160

10.0 –30 160

The 0.1% settling on –30 dBm power level results were not improved because of the amount of time needed to settle to 0.1% on –30 dBm.

FAST

ON/OFF

command

Using the FAST command (page 6-37) limits the types of measurements that can be taken. As some processes are turned off, higher measurement speeds can be achieved. FAST will not operate when sent via RS232. When THE FAST ON command is selected, the readout display is also turned OFF.

NOTE

Using FAST mode only increases speed when asking for one measurement at a time, using the ‘Receive’ command.

C code example:

/* send fast mode ON*/ Send(0, 13, “FAST ON”, 7L, NLend);

/* Setup the power meter into talk addressed. In this mode */ /* we can read from power meter without readdressing each */ /* time. */

Receivesetup(0,13);

/* Now read 10 readings */ for (loop = 0; loop < 10; loop++)

{

RcvRespMsg(0,buffer,STOPend);

}

Settling (%) Power Level (dBm) Readings/Second

0.1 0 150

0.1 –30 150

10.0 0 610

10.0 –30 250

The 0.1% settling on –30 dBm power level results were not improved because of the time needed to settle to 0.1% at –30 dBm.

5-22 ML2430A OM

PROCEDURES OPTIMIZING READINGS

Using

Buffered

Requests

Using the buffered Output channel ON command (page 6-64), even faster meas urement speeds can be achieved. By using the ON command instead of the O command

number of times, extra processing is removed, resulting in improved

speed.

NOTE

Using FAST mode here will not increase the speed as this mode only works when asking for one measurement at a time (i.e., the ‘O’ command only.)

C code example:

/* Reset unit and ask for 200 buffered readings n channel 1 */ Send(0, 13, “*RST; ON 1, 200”, 15L, NLend);

/* use a large buffer size (4K for 200 readings) */ Receive(0, 13, buffer, 4096, STOPend);

Settling (%) Power Level (dBm) Readings/Second

0.1 0 216

0.1 –30 202

Changing

measurement modes

By changing the sensor measurement mode to Custom, the ML2430A Series can be precisely configured to meet the needs of the specific application.

In this example, the Trigger Gate Width (page 6-79) has been reduced to 1 ms, Channel 1 is set to Sensor A, and Channel 2 is off.

C code example:

/* reset unit. Custom measurement mode, 1 ms TRGGW */ /* Auto averaging Sensor A Channel 2 off*/ /* Use FAST mode*/ Send(0, 13, “*RST; FAST ON; SENMM A,

CUSTOM; TRGGW 1ms”, 51L, NLend);

Receivesetup(0,13);

/* Fast mode, therefore do not send ‘O 1’ for data, just read.*/ for(i=0; i<10; i++)

RcvRespMsg(0,buffer,STOPend);

Power Level (dBm) Readings/Second

0 240

–30 240

ML2430A OM 5-23

OPERATOR MAINTENANCE PROCEDURES

AN EXAMPLE

PROGRAM IN C

#include <stdio.h>

/* include the NI 488.2 GPIB include file */ #include “DECL.H”

/* LINK with MCIB.LIB */

/* Compiled with BorlandC++ 2.0 */

void main() {

int i; char buffer[10][20];

/* clear buffer */ memset(buffer,0,200);

SendIFC(0); if ( ibsta & ERR ) {

printf(“GPIB error\nibsta: %0x\niberr: %i\n\n”, ibsta, iberr); exit(1);

}

5-16

OPERATOR MAINTENANCE

/* Setup ML2430A at address 13 */ /* FAST mode (output readout channel 1) Send(0, 13, “*RST; FAST ON”, 13L, NLend);

/* Loop 10 times and store readings */

for(i=0; i<10; i++)

Receive(0, 13, buffer[i], 20, STOPend);

/* display readings.. */ for(i=0; i<10; i++)

printf(“Reading %i = %s”, i+1, buffer[i]);

}

The ML2430A Series does not require any operator maintenance. All re pairs must be performed by qualified service personnel only. Refer to Ta ble 2-1 for the nearest Anritsu Service Center.

5-24 ML2430A OM

Chapter 6 GPIB Operation

6-1

6-2

Command mnemonic

Command function

Command Syntax String

Allowable values for the command argument(s), if any.

INTRODUCTION

TYPOGRAPHIC CONVENTIONS

CFFRQ Cal Factor Frequency value SENSOR

This chapter provides alphabetically-ordered listings and descriptions of all ML2430A Series GPIB programming commands. The majority of the GPIB com mands have equivalents in the front panel menu settings. Note that GPIB opera tion is not available when the power meter is running from the internal battery (option ML2400A-11). The ML2430A Series Power Meter supports the IEEE

488.2–1992 GPIB standard in ML24XXA (native) mode (HP emulation com mands are not GPIB 488.2 compliant). For further information about GPIB pro gramming, refer to the IEEE 488.1/2 Standards documents.

The typographic conventions, abbreviations, and syntax legend used throughout this chapter to define the GPIB commands are described in Figure 6-1.

Syntax:

value:

Remarks:

Related Com

mands:

CFFRQ <s>, <value>[units]

A or B 1 kHz to 140 GHz

An expanded description of the command, how to use the command, and programming hints or restrictions.

Commands that impact or relate to this command.

Indicates the Command's “Functional Group” (ML24XXA native mode commands only)

Example:

Query:

Figure 6-1. Typographic Conventions for Command Listings

6-3

DATA I/O FORMATS

An example of the command in use.

The associated query command and returned string, if any.

All ML24XXA (native) GPIB 488.2 commands that use parameters must have a space between the command header and the first parameter, and all subsequent parameters must on the same line, but must be separated by a semicolon (;).

The format for ML2430A Series (native) GPIB commands is:

<command header><space><parameter 1>,<parameter

be separated by a comma (,). Multiple commands may be sent

>,...

ML2430A OM 6-1

DATA I/O FORMATS GPIB OPERATION

HP and ML4803 emulation commands on the other hand, do not have to have a space between the command header and the parameter, or commas between the parameters.

The format for HP emulation commands is:

<command header><parameter 1><parameter

>...

The end of the command text must be terminated with either a line feed character (0Ah, decimal 10) or a GPIB End of Transmission State (EOI), or both.

Data input and output formats and templates referred to throughout this chapter are delimited with the less-than and greater-than characters (< >). Optional pa

rameters and suffix characters are delimited with brackets ([ ]). These characters are not part of the data and are only used in this text to distinguish the data ele

ments they represent.

All the commands which allow a level to be set as a value argument are floating point values which can use the E-0x convention or a suffix multiplier. The GPIB standard [units] convention (i.e., MS for milliseconds, etc.) IEEE codes and formats have been implemented for the suffix units and multipliers. The suffix unit is always allowed but is not required and is shown in brackets where appropriate.

Table 6-1 lists the numeric data suffix mnemonics for the ML2430A Series Power Meter. These mnemonics are used when entering numeric data with GPIB commands (use of these codes is optional).

Commands which are not floating point, but integer, are:

Suffix Multipliers Suffix Units

Definition Mnemonic Definition Mnemonic

1E18 EX Decibels DB

1E15 PE dB ref to 1 mW DBM

1E12 T dB ref to 1 mVDBUV

1E9 G Mega Hertz MHZ

1E6 MA Percent PCT

1E3 K Seconds SEC

1E-3 M Seconds S

1E-6 U Volts V

1E-9 N Watts W

1E-12 P Hertz HZ

1E-15 F

1E-18 A

Table 6-1. Numeric Data Suffix Mnemonics

6-2 ML2430A OM

GPIB OPERATION DATA I/O FORMATS

All of the Status enable type commands (*SRE for example)

Stored numbers (i.e., 0, 1, 2, 3, 4, 5)

Offset table numbers (i.e., 1, 2, 3, 4, 5, 6...)

GPIB addresses (1 to 30)

User Averaging number in the AVG command (1 to 512)

Display contrast number (1 to 12).

The ML2430A Series data formats are summarized below:

<NR1> This notation represents ASCII integer values. A comma (,) is used to separate

multiple values sent in a single command input or output string. Examples of values that can be represented by <NR1> notation: 1 0 –29,179

<NR2> This notation represents ASCII floating point values in decimal point format. A

comma (,) is used to separate multiple values sent in a single command's input or output string.

Examples of values that can be represented by <NR2> notation:

1.0 –0.00015

12.743, –180.07

<NR3> This notation represents ASCII floating point values in exponential format (scien-

tific notation). A comma (,) is used to separate multiple values sent in a single command's input or output string. Examples of values that can be represented by <NR3> notation:

1.0E9

7.056E3

9.0E2,3.42E2

<NRf> This notation is used to signify that data can be in either <NR1>, <NR2>, or

<NR3> format as described above. Examples of values that can be represented by <NRf> notation:

1.0E9

10.005 83,4.5E2,234.9901

<String> This notation represents a string of 7-bit ASCII characters (including non print

able characters) that is delimited (surrounded) with either single quotes (' ') or double quotes (“ ”). The string can include text formatting characters such as line feed, space, or carriage return. Note that if a double quote character must be sent as part of the string, then it must be followed by an additional double quote. Alternatively, the string can be sent using single quotes as shown in the “cal_file” example below. Examples of data represented by <String> notation are:

ML2430A OM 6-3

QUERY COMMANDS GPIB OPERATION

“1/15/98" ”Save “”cal_file"" now." 'Save “cal_file” now.'

<Arbitrary ASCII> This notation represents undelimited 7-bit ASCII text. The end of the text must be

terminated with the line feed character (0Ah, decimal 10) or a GPIB End of Trans mission State (EOI), or both. This requirement makes it necessary for <Arbitrary ASCII> text to be transmitted only at the end of a program or response message, that is, at the end of a multiple input or output statement. Example of data represented by <Arbitrary ASCII> notation: Anritsu,2410A,123456,1.0<0A^EOI> The example shows a sample response from the *IDN?, 488.2 common query. In the example, the instrument identifies it self as an Anritsu 2410A, with serial number 123456, and software version 1.0 in stalled. Note that decimal 10 (0Ah character) must be sent with the EOI to signal end of transmission.

<Arbitrary Block> This notation represents data transmitted as 8-bit data bytes (00-FF hex, 0-255

decimal, notation is <DAB>). Useful for transmitting large blocks of formatted ASCII or binary data or unformatted binary data. The data stream is immediately preceded by a variable length ASCII header that is encoded with the number of data bytes to be sent. The header always starts with the (#) character.

6-4

QUERY COMMANDS

Many ML24XXA (native) GPIB commands have an equivalent query command that will return a current value or setting. Query commands and their returned strings are provided with each command where applicable.

A complete listing of valid query commands and returned strings is provided in Appendix B, Section B-2.

6-4 ML2430A OM

GPIB OPERATION GPIB PC CARD SETUP

6-5

GPIB PC CARD SETUP

The following GPIB driver configuration set up is recommended for reliable GPIB communication with the ML2430A Series power meter. The set up is expressed in the terms used by the National Instruments GPIB ISA and PCI cards and driv ers for WIN95 and DOS.

GPIB Device Template The ML2430A Series default primary address is 13. Separate device templates

for the primary address of each device can usually be set up separately. The set tings for the device template for the ML2430A Series are:

Terminate read on EOS NO

Set EOI with EOS on write YES

Type of compare on EOS 8 bit

EOS byte 0x0A (10 decimal)

Send EOI at end of write YES

Readdressing YES

Secondary address NONE

GPIB Card Settings The recommended GPIB card settings for use with the ML2430A Series are:

Terminate read on EOS NO

Set EOI with EOS on writes YES

Type of compare on EOS 8 bit

EOS byte 0x0A (10 decimal)

Send EOI at end of write YES

System controller YES

Assert REN when SC YES

Enable Auto Serial polling NO

NI card. Cable length for HS488 OFF

ML2430A OM 6-5

USING 488.1 GPIB GPIB OPERATION

6-6

USING 488.1 GPIB

Commands

Device CLear (DCL)

and Selected Device

Clear (SDC)

Device trigger (GET) This command triggers a GPIB device. An action predefined by the setup of the

IEEE 488.1 level commands are in the form of data byte codes with the attention (ATN) line set. A separate function is normally provided to drive these commands from a GPIB program. A typical GPIB driver library call for 488.1 and 488.2 is given for each of the following commands. Refer to the IEEE 488.1 and IEEE488.2 device driver manuals for full definitions of the responses, and to find the actual command format for your GPIB driver library.

These commands clear the GPIB device interface and have the following effects:

All buffered messages waiting to be processed are cleared.

All buffered data waiting to be read from the device is cleared.

Stop any pending actions.

For example, if a request for data has been sent, and the system is waiting for the reading to be triggered, the system would wait until the reading has been pro vided before any further GPIB commands can be processed. The device clear will clear the data request so further GPIB commands after the device clear has completed can be actioned.

Typical device library calls are 488.1 'ibclr' and 488.2 'DevClear'.

device being triggered will take place. On the ML2430A Series, the device trigger provides a trigger of the type defined by the GTn commands previously sent and a reading put into the output buffer for each display channel that is not OFF. In Profile mode, the profile display for the selected channel only is output.

Typical device library calls are 488.1 'ibtrg' and 488.2 'Trigger'.

Goto local (GTL) This command forces the device out of remote mode and into local operation

mode. The local operation keys and menus are now available.

Typical device library calls are 488.1 'ibloc' and 488.2 'EnableLocal'.

Interface clear (IFC) This is part of the GPIB initialization and forces the board to the controller in

charge.

Typical device library calls are 488.1 'ibsic' and 488.2 'SendIFC'.

Local lockout (LLO) Sends the local lockout to all devices. The local lockout disables the 'LOCAL' key

on all the devices.

Typical device library calls are 488.1 'ibconfig' plus correct option and 488.2 'SendLLO'.

Serial poll This command will clear any SRQ's and read the status byte of the device.

6-6 ML2430A OM

GPIB OPERATION USING 488.2 GPIB

Typical device library calls are 488.1 'ibrsp' and 488.2 'ReadStatusByte'.

6-7

USING 488.2 GPIB

The IEEE 488.1 GPIB standard was updated in 1987 to 488.2 to better enforce standardization of GPIB communication. This section explains the fundamentals of 488.2 GPIB operation and how it is implemented in the ML2430A Series Power Meter. Refer to the full IEEE 488.2 standard for more detailed information.

488.2 Command

All commands should follow the basic format:

Format

<white space> = Normally a space character, but can be any of the white space characters listed in the 488.2 manual.

<terminator> = A line feed character (for example, \n in ‘C’ or VBLF in Vis ual Basic). An EOI ( End Of transmission Interrupt ) can be used as the last character instead of the line feed.

Example: AVG A,MOV,64

A number of commands can be put into one program message by separating the commands with semicolons. Example:

CHCFG 1,A;CHCFG 2,B-A;CHUNIT 1,W;CHUNIT 2,DBM;OPMD DIGIT

Status Byte The 488.2 standard added two extra predefined bits to the status byte, these bits

are the Event Status Bit (ESB) and the Message AVailable bit (MAV).

Event Status Bit (ESB)

PON

URQ

CMD

EXE

DDE

QYE

RQC

Power On bit. This bit is set on power up of the device only.

Not used in the ML2430A Series

Command error. Received an illegal command.

Execution error. Could not execute a command. For example, a parameter is out of the allowable range, or requesting graph data while in readout mode.

Device Dependent Error. The specific error can be found by using the ERRLST command.

Query Error.

Request Control. GPIB controllers only.

In 488.2 there is an event status register (ESR) that allows the state of the GPIB interface to be monitored. All the bits in this regis ter are defined. These bits are:

Event Status Register (ESR)

ML2430A OM 6-7

USING 488.2 GPIB GPIB OPERATION

OPC

Operation Complete. When a program message that includes the *OPC com mand has been completed, and the GPIB interface is idle, with any responses read out of the output buffer this bit is set. For example, if the last command in a configuration sequence is *OPC, the OPC bit in the event status register will be set when that configuration list has been completed.

Also refer to Figure 6-2, page 6-13,

IEEE 488.2 Standard Status Structures

If an event causes a bit in the ESR to be set and the corresponding bit in the Event Status Enable byte (ESE) is set, the ESB bit in the status byte will be set. This can cause an SRQ (see Section 6-8) if the ESB bit in the Status Register Enable byte (SRE) is set. For example, to get an SRQ on an unrecognized com mand do the following:

1. Set the CMD bit in the event status enable byte, and set the ESB bit in the status register enable byte. Send:

*ESE 32;*SRE 32

2. Now if an unrecognized command is sent to the ML2430A, an SRQ will be given. Send:

asdf

An SRQ will be indicated.

3. To clear the SRQ do a serial poll, this should return the decimal value 96, bit 6 for the SRQ and bit 5 for the ESB. The SRQ will be cleared.

4. To read the Event Status Register (ESR), send:

*ESR?

This will put 32 (or 160 if PON is set) in the output buffer to be read.

Message Available Bit (MAV)

This bit is set if there is any data in the output buffer waiting to be read, and can be used to ensure that only the latest reading is used. Upon receiving a request for data, the next reading taken is put in the output buffer. The data in the output buffer should always be read when data is available to ensure that old data is never left behind. The advantage of this method is that if the MAV bit is not set, the controller can not read old data, therefore data can only be read after it has been requested. Example:

1. In Readout display with the output buffer empty and the MAV bit not set, config

ure the ML2430A to give an SRQ on data becoming available by setting bit 4 in the Status Register Enable byte (SRE):

*SRE 16

6-8 ML2430A OM

GPIB OPERATION SERVICE REQUEST STATUS (SRQ)

(

)

2. Request data from display channel 1 by sending:

The SRQ will be set with the new reading which will now be in the output buffer ready to be read. The data should now be read so that the MAV bit will be cleared. If the data is not read, or the output buffer not cleared, and another re quest for data is made this data will be buffered after the previous data.

Getting a Reading The 488.2 standard requires that the data can only be read from the device after

it has been requested. Any data requested from the device is made available to be read, and is stored in an output buffer.

As long as there is data in the output buffer to be read, the Message AVailable (MAV) bit in the status byte is set. This bit allows data to be requested and, as soon as the data is available, the MAV bit is set, from which a service request can be produced (SRQ).

The ML243X allows this output buffer to be turned off using the BUFF OFF command. In this mode of operation, if a number of data requests are made with out reading the data after each request, only the last data requested is available. Note that this does not include the serial poll request which is handled independently.

6-8

SERVICE REQUEST STATUS (SRQ)

RGH If a sensor goes over or under the operating range, this bit is set. This bit can be

LIM If a channel pass/fail limit fails, this bit will be set. This bit can be used to set an

MAV If data is available in the output queue, this bit is set. This bit can be used to set

The System Service Request Status byte available over GPIB by a serial poll is defined as follows:

76543210

Over/Under Range bit (RGH)

Limit Fail bit (LIM)

Message Available in output queue (MAV)

Event Status bit

used to set an SRQ by setting the same bit in the SRE register using the *SRE command (page 6-102). For more detail, see the STATUS command (page 6-72). This bit can only be cleared by sending a *CLS command (pages 6-12, 6-100).

SRQ by setting the same bit in the SRE register using the *SRE command. For more detail, see the STATUS command. This bit can only be cleared by sending a *CLS command.

an SRQ by setting the same bit in the SRE register using the *SRE command. This bit is only cleared when there is no data waiting to be transmitted.

ESB

ML2430A OM 6-9

FUNCTIONAL GROUPS GPIB OPERATION

ESB If any of the event register bits are set and the corresponding event status enable

bits are set the ESB bit in the status byte will be set. This bit can be used to set an SRQ by setting the same bit in the SRE register using the *SRE command. The ESB bit is cleared when the ESR is read by using the *ESR? command (pages 6-14, 6-54, 6-101).

6-9

FUNCTIONAL GROUPS

BNC Commands in this group are used to configure the rear panel BNC inputs and

CALIBRATION The CALIBRATION group commands are used for the 0.0 dBm reference calibra-

CHANNEL The CHANNEL command group controls the configuration of the two channels.

DATA

OUTPUT

DISPLAY These commands control characteristics of the display, including the peakmeter

Throughout the ML24XXA (native) mode section of this chapter, the distinctive, white on black text, in the upper corner of each command description area, indi cates the Functional Group to which the command belongs (Figure 6-1). All ML24XXA (native) commands are presented by Functional Group in Appendix B, GPIB Quick Reference.

The Functional Groups are:

outputs.

tion and zeroing of the power sensors.

When both channels are activated, Channel 1 appears at the top of the display and Channel 2 at the bottom. If one channel is turned off, the remaining channel appears in the center of the screen.

Commands in this function group are used to place data on the GPIB to be read by the controller.

reading display and contrast adjustments.

GPIB 488.2 This group contains the GPIB 488.2 mandatory commands. Refer to the IEEE

488.2-1987 Standards documents for further information.

GPIB SETUP The commands in this group control the GPIB Address, GPIB command set emu

lation mode (ML24XXA, ML4803A or HP Emulation), and other parameters.

GPIB

TRIGGER

PROFILE

SETUP

Commands in this group are used to configure GPIB triggering and setup the GPIB Group Execute Trigger (GET) and TR commands (TR0, TR1, TR2, TR3). Note that these commands are exclusive to GPIB, and do not have equivalent front panel operations.

The PROFILE SETUP function group commands change how the profile is dis played on the screen. Note that the Display Trigger configuration commands (DTRGD and GRPRD) in this group do not change how the system triggers, only where the graph is drawn after a trigger has occurred. Refer to the TRIGGER group functions to configure the measurement triggering.

6-10 ML2430A OM

GPIB OPERATION FUNCTIONAL GROUPS

SENSOR The SENSOR group commands select the data acquisition controls for the se

lected sensor.

SYSTEM The SYSTEM group commands control the overall functionality of the ML2430A

Series Power Meter, including the system operation mode, cursor control, display configuration, sound, printing, battery control and status, rear panel configuration, graphics, system security, and system identity.

TRIGGER The TRIGGER group functions are used to program the triggering of measure

ment data. TRIGGER group commands are available in PROFILE operation mode, and in READOUT mode if the SENSOR|SETUP|MODE submenu is set to CUSTOM.

In CUSTOM, the channels are triggered simultaneously if the trigger conditions are set to 1 and 2. This guarantees the trigger conditions are the same, and therefore the readings are valid if taken at the same time.

Changes to the trigger configurations can be made using these GPIB commands regardless of the power meter operating mode, but will not come into play until the unit is configured to use triggers.

ML2430A OM 6-11

ML24XXA NATIVE COMMANDS GPIB OPERATION

6-10

ML24XXA NATIVE COMMANDS

*CLS Clear GPIB status bytes

This section provides an alphabetical listing of the GPIB commands (mnemonics) used to program the Model ML2430A Series Power Meter in ML24XXA (native) mode. The emulation mode can be set through the front panel SYSTEM|more|more|Rear panel|GPIB|MODE menu (see Chapter 4, Operation) or through the GPIB command EMUL (page 6-35).

All ML24XXA (native) GPIB commands that use parameters must between the command header and the first parameter, and all subsequent pa rameters must the same line, but must be separated by a semicolon (;).

The format for ML24XXA (native) GPIB commands is:

<command header><space><parameter 1>,<parameter

The end of the command text must be terminated with a line feed character (0Ah, decimal 10) or a GPIB End of Transmission State (EOI), or both.

Syntax:

Remarks:

*CLS

This command performs a status data structure clear command. The event status register and the status register are cleared except for the MAV bit. *CLS does not clear the output buffer.

have a space

be separated by a comma (,). Multiple commands may be sent on

>,...

GPIB 488.2

*ESE Event Status byte Enable

Syntax:

Remarks:

*ESE <val>

val:

8-bit mask

Sets the Standard Event Status Enable Register bits (see Figure 6-2): Bit 7: Power ON, when there has been a transition from a power OFF state to a power ON state. Bit 5: Command Error. This bit is set when an incorrect GPIB code is sent to the power meter. Bit 4: Execution Error. This bit is set when incorrect data is sent to the power meter, e.g., ADDR 57 would result in an Execution Error as the al lowable address value range is 1 to 30. Bit 3: Device Dependent Error (DDE). This bit is set true whenever a meas urement error occurs. Device Dependent Errors are:

ZERO fail - Zero attempted for a sensor and failed. CAL 0 dBm fail - 0 dBm value to far out. Display channel number goes out of displayable range -

Displayable range is +99.999 to –99.999 dBm.

Illegal log calculation for a channel - When a channel input

GPIB 488.2

6-12 ML2430A OM

GPIB OPERATION ML24XXA NATIVE COMMANDS

configuration combines sensors, the combination is done in linear units. If the result of the combination produces a

negative linear value and the displayed units are log

(i.e., dB) this would be an illegal logarithmic operation.

Printer error - A print was requested and this error was

returned.

Request for data from a channel with no sensor connected.

Bit 0: Operation Complete. This bit is set when the *OPC command com

pletes and can be used to tell the controller the unit has completed those commands just sent. See *OPC and *OPC? for more details.

All other bits are not used. The bits above are 488.2 common bits. The ERRLST command will return an error list giving the state of the DDE causes.

Commands:

Power On

User Request

Query Error

Device Dependent Erro

Execution Error

Command Error

76543210

Logical OR

76543210

*ESR?, *ESE?, ERRLST

Operation Complete

Request Control

Standard

Event Status Register

*ESR?

Standard

Event Status Enable

*ESE <NR >

*ESE?

Queue

not empty

Output Queue

Service

Request

Generation

RQS

ESB MAV

Logical OR

MSS

3210

7 543210

read by Serial Poll

Status Byte Register

read by *STB?

Service Request

Enable Register

*SRE <NR >

*SRE?

Figure 6-2. IEEE 488.2 Standard Status Structures

ML2430A OM 6-13

Anritsu ML2430A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual