Anritsu S251A User Manual

Site Master ™

S251A

Antenna and

Cable Analyzer

User's Guide

Hand-Held Tester For Antennas, Transmission

Lines And Other RF Components

Color Cover P/N: 00986-00022

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 the environmental specifications of the product. No other warranty is expressed or implied, and the remedies provided herein are the Buyer's sole and exclusive remedies.

TRADEMARK ACKNOWLEDGEMENTS

MS-DOS, Windows, Windows for Workgroups, Windows NT, and Windows 95 are registered trademarks of the Microsoft Corporation. Site Master and Cable Mate are trademarks of Anritsu Company.

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.

General Information ..........1-1

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

Description ..................1-1

Standard Accessories.............1-2

Options ....................1-3

Optional Accessories .............1-3

Performance Specifications .........1-5

Preventive Maintenance ...........1-8

Calibration ..................1-9

Annual Verification .............1-10

Connectors and Controls .......2-1

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

Test Panel Connectors ............2-1

Keypad Controls ...............2-2

Soft Keys and Menus .............2-7

Determining Remaining Battery Life . . . 2-26

Printing....................2-27

Printer Switch Settings ................2-27

Printing a Screen ...................2-28

Symbols ...................2-29

Self Test ...................2-29

Error Codes .................2-29

Self Test Errors ....................2-29

Range Errors .....................2-29

Replacing the Battery ............2-29

Using the Soft Carrying Case........2-35

Operation ................3-1

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

Operating Functions .............3-1

Making Common Function Selections ...3-3

Applying Power ....................3-3

Setting Options .....................3-3

Setting Markers ....................3-3

Setting Scale/Limits ..................3-4

Return Loss (SWR) and Cable Loss

(One Port) Measurement ..........3-5

Required Equipment..................3-5

Device-Under-Test Specification ...........3-5

Procedure ........................3-5

Selecting the Measurement Mode ...........3-5

Selecting the Frequency Range ............3-7

Performing a Calibration ...............3-7

Cable Return Loss Measurement ...........3-9

Setting the Limit Line .................3-9

Setting the Markers ..................3-9

Saving Display to Memory ..............3-11

Cable Loss Measurement...............3-11

Scaling the Display ..................3-11

Saving Display to Memory ..............3-12

DTF Measurement .............3-13

Required Equipment .................3-13

Device-Under-Test Specification...........3-13

Procedure .......................3-13

DTF Parameters Setup ................3-13

Performing a Calibration...............3-15

DTF Measurement (Determining the Length

of the Cable) .....................3-16

DTF Measurement (Determining the Quality

of the Cable) .....................3-18

Insertion Gain (Amplifier) Measurement . 3-20

Required Equipment .................3-20

Device-Under-Test Specification...........3-20

Procedure .......................3-20

Insertion Gain Mode Selection ............3-20

Selecting the Frequency Range ...........3-21

Performing a Calibration...............3-21

Amplifier Gain Measurement ............3-24

Setting the Markers..................3-24

Activating the Bias Tee ................3-27

Scaling the Display ..................3-27

Saving Display to Memory ..............3-28

Making Power Measurements .......3-29

Entering Power Monitor Mode ...........3-29

Zeroing the Power Monitor .............3-29

Measuring High Input Power Levels ........3-29

Displaying Power in dBm and Watts ........3-30

Displaying Relative Power ..............3-30

RF Source Operation ............3-31

Generating a CW Frequency.............3-31

Software Tools Program........4-1

Description ..................4-1

Requirements .................4-1

Communication Port Setting.........4-2

Changing COM Port Settings–Windows 3.1 .....4-2

Changing COM Port Settings–Windows 95 .....4-4

Software Installation .............4-6

Plot Capture..................4-8

Capture multiple to database .............4-8

Capture multiple traces to PC screen.........4-9

Single trace capture..................4-10

Program Operation .............4-11

Fault Location Software ..........4-11

Smith Chart Software............4-12

Saving a Plot as a Windows Metafile....4-12

iii

Saving Data to a Spreadsheet........4-13

Saving Data to a Database .........4-13

“Drag-n-Drop” ...............4-14

Printing....................4-14

Appendix A Reference Data .....A-1

Description ..................A-1

How to Use this Manual

The operation of the Site Master ™ is straightforward and intuitive. However, you may find it helpful to review the operation of the keys and menus prior to first-time use.

Descriptions of the keys and menus are provided in Chapter 2; measurement procedures are found in Chapter 3.

First-time users and maintenance supervisors will benefit from perusing the material in Chapter 1. This chapter describes the instrument and provides listings of options, accessories, and performance specifications.

Please Recycle

This product contains a rechargeable nickelcadmium battery. Spent nickel-cadium batteries are valuable resources, do not throw them away. Arrange for proper return for recycling in your locality. If you do not have access to proper disposal methods, return the battery to your Anritsu service center. Anritsu service centers will dispose of the unit at no charge. Anritsu service centers are listed in Table 1-2 (page 1-11).

Figure 1-1. Site Master System

1-0

Site Master S251A

Chapter 1 General Information

Introduction

This chapter provides a description, performance specifications, optional accessories, preventive maintenance, and calibration requirements for the Site Master model S251A. Throughout this manual, the term Site Master will refer to the model S251A.

Model Frequency Range

S251A 625 to 2500 MHz

Description

The Site Master (Figure 1-1) is a hand held S21(transmission gain or loss), SWR/RL (standing wave ratio/return loss), and Distance-ToFault (DTF) measurement instrument that includes a built-in synthesized signal source and an optional power monitor. It uses a keypad to enter data and a liquid crystal display (LCD) to provide a graphical indication of S Site Master has a built-in distance-to-fault (DTF) capability. It is capable of up to two hours of continuous operation from a fully charged internal battery and can be operated from a 12.5 dc source (which will also simultaneously charge the battery). Built-in energy conservation features can be used to extend battery life over an eight-hour work day.

, SWR, or RL over the selected frequency range. The

The Site Master is designed for measuring transmission gain/insertion loss, SWR, return loss, or cable insertion loss and locating faulty RF

1-1

Chapter 1 General Information

components in antenna systems. Power monitoring and bias tee capabilities are available as options. The displayed trace can be scaled and/or enhanced with settable frequency markers and/or a limit line. A menu option provides for an audible “beep” when the limit value is exceeded. To permit use in low-light environments, the LCD can be back lit using a front panel key.

Standard Accessories

A PC based software program (called Software Tools) provides an online database record for storing measurement data. Site Master Software Tools can also convert the Site Master display to a Microsoft Windows 95 graphic. Measurements stored in the Site Master internal memory are down-loaded to the PC using the included serial cable. This null-modem serial cable connects between the Serial Interface connector on the Site Master and a Com Port on a DOS/Windowsbased PC. Once stored, the graphic trace can then be displayed, scaled, and/or enhanced with markers and limit lines. Historical graphs can be overlaid with current data by using the PC's mouse in “drag-n-drop” fashion. The underlying data can be extracted and used in spreadsheets or for other analytical tasks.

The Software Tools program also performs DTF (Distance To Fault) or Fault Location by clicking on the appropriate icon.

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Chapter 1 General Information

The following items are supplied with the basic hardware.

Soft Carrying Case

•

AC-DC Adapter

•

Automotive Cigarette Lighter 12 Volt DC Adapter,

•

3 1/2-inch floppy disk containing the Software Tools program.

•

This program contains Fault Location (DTF) and Smith Chart functions

Serial Interface Cable (Null Modem Type)

•

One year Warranty (includes battery, firmware, and software)

•

User's Guide

•

Options

• Option 5 — Add RF Wattmeter Power Monitor

•

Option 10 — Add Bias Tee

Optional Accessories

•

Anritsu Precision N (m) Short/Open, Part No. 22N50

•

Anritsu Precision N (f) Short/Open, Part No. 22NF50

•

Site Master Precision N (m) Load, 42 dB, Part No. SM/PL

•

Site Master Precision N (f) Load, 42 dB, Part No. SM/PLNF

•

7/16 (m) Precision Open/Short/Load, Part No. 2000-767

•

7/16 (f) Precision Open/Short/Load, Part No. 2000-768

•

Adapter, Precision N (m) to N (m), Part No. 34NN50A

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Chapter 1 General Information

Adapter, Precision N (f) to N (f), Part No. 34NFNF50

•

Adapter, 7/16 (f) to N (m), Part No. 510-90

•

Adapter, 7/16 (f) to N (f), Part No. 510-91

•

Adapter, 7/16 (m) to N (m), Part No. 510-92

•

Adapter, 7/16 (m) to N (f), Part No. 510-93

•

Adapter, 7/16 DIN (m) to 7/16 DIN (m), Part No. 510-96

•

Adapter, 7/16 DIN (f) to 7/16 DIN (f), Part No. 510-97

•

Armoured Test Port Extension Cable, 1.5 meter, N (m) to

•

N (f), Part No. 15NNF50-1.5A

• Armoured Test Port Extension Cable, 3.0 meter, N (m) to

N (f), Part No. 15NNF50-3.0A

• Armoured Test Port Extension Cable, 5.0 meter, N (m) to

N (f), Part No. 15NNF50-5.0A

• Armoured Test Port Extension Cable, 1.5 meter, N (m) to

N (m), Part No. 15NN50-1.5A

•

Armoured Test Port Extension Cable, 3.0 meter, N (m) to N (m), Part No. 15NN50-3.0A

•

1-4

Armoured Test Port Extension Cable, 5.0 meter, N (m) to N (m), Part No. 15NN50-5.0A

Armoured Test Port Extension Cable, 1.5 meter, N (m) to 7/16 DIN (f), Part No. 15NDF50-1.5A

Armoured Test Port Extension Cable, 1.5 meter, N (m) to 7/16 DIN (m), Part No. 15ND50-1.5A

RF Detector, 1 to 3000 MHz, N(m) input connector, 50 Ohms, Part No. 5400-71N50

Chapter 1 General Information

Transit Case for Site Master, Part No. 760-215

•

HP Deskjet 340 Printer, Part No. 2000-766

•

Serial-to-Parallel Converter Cable (use with the HP 340

•

Printer), Part No. 2000-753 Seiko DPU-414 Thermal Printer, Part No. 2000-754 (U.S.) or

•

2000-761 (Europe) US Adapter (use with the DPU-414 Printer),

•

Part No. 2000-1002 Europe Adapter (use with the DPU-414 Printer)

•

Part No. 2000-1003 Battery Pack (use with the DPU-414 Printer)

•

Part No. 2000-1004

• Serial Interface Cable (use with the DPU-411 Printer),

Part No. 2000-XXX

• Thermal Paper (use with the DPU-411/DPU-414 Printer),

Part No. 2000-755

Performance Specifications

Performance specifications are provided in Table 1-1, on the following page.

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Chapter 1 General Information

Table 1-1. Performance Specifications (1 of 2)

Specifications are valid when the unit is calibrated at ambient temperature after a 5 minute warmup.

Description Value

Frequency Range: 625 to 2500 MHz Frequency Accuracy (RF Source

Mode) Frequency Resolution 100 kHz SWR:

Range Resolution

Return Loss:

Range Resolution

Cable Insertion Loss:

Range Resolution

Insertion Loss/Gain:

Range Resolution

**Distance-To-Fault (DTF):

Range Resolution (in meters) (Rectangular Windowing)

Bias Tee:

Input Voltage Output Current

75 parts per million @ 25°C*

1.00 to 65.00

0.01

0.0 to 54.00 dB

0.01 dB

0.0 to 54.00 dB

0.01 dB

–120.0 to 100.0 dB

0.01 dB

0 to (Resoution x 129) ( . )( )15 10

Where propagation velocity.

12.5 - 15 Vdc 200 mA max

Frequency

is the cable's relative

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Chapter 1 General Information

Table 1-1. Performance Specifications (2 of 2)

Wattmeter Power Monitor:

Range Offset Range

Resolution

Test Port, Type N 50 Ohms ***Immunity to Interfering signals

up to the level of +10 dBm, Reflection

Maximum Input (Damage Level):

Test Port, Type N RF Detector

Measurement Accuracy: Measurement accuracy depends on calibration components. Precision calibration components have a directivity of 42 dB.

Temperature:

Storage

Operation Weight: 3.0 pounds (1.36 kg) Size: 8x7x2

–50.0 to +20 dBm

10.0 nW to 100.0 mW 0 to +60.0 dB

0.1 dB

0.1 xW

+30 dBc, Transmission

+22 dBm +20 dBm

–20° Cto75° C

0° Cto50° C

inches

(203.2 x 177.8 x 57.2 mm)

±2 ppm/D°C from 25°C

** Fault location is accomplished by inverse Fourier Transformation of data taken with the Site Master. Resolution and maximum range depend on the number of frequency data points, frequency sweep range and relative propagation velocity of the cable being tested.

*** Immunity measurement is made in CW mode with incoming intefering signal exactly at the same frequency (worst case situation). Typical immunity is better when swept frequency is used.

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Chapter 1 General Information

Preventive Maintenance

Site Master preventive maintenance consists of cleaning the unit and inspecting and cleaning the RF connectors on the instrument and all accessories.

Clean the Site Master with a soft, lint-free cloth dampened with water or water and a mild cleaning solution.

CAUTION: To avoid damaging the display or case, do not use solvents or abrasive cleaners.

Clean the RF connectors and center pins with a cotton swab dampened with denatured alcohol. Visually inspect the connectors. The fingers of the N (f) connectors and the pins of the N(m) connectors should be unbroken and uniform in appearance. If you are unsure whether the connectors are good, gauge the connectors to confirm that their dimensions are correct.

Visually inspect the test port cable(s). The test port cable should be uniform in appearance, not stretched, kinked, dented, or broken.

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Chapter 1 General Information

Calibration

The Site Master is a field portable unit operating in the rigors of the test environment. An Open-Short-Load (OSL) calibration should be performed prior to making a measurement in the field. A built-in temperature sensor in the Site Master advises the user, via an icon located on the left side of the LCD screen, that the internal temperature has exceeded a safety window, and the user is advised to perform another OSL calibration in order to maintain the integrity of the measurement.

NOTES: For best calibration results—compensation for all measurement uncertainties—ensure that the Open/ Short/Load is at the end of the test port or optional extension cable; that is, at the same point that you will connect the antenna or device to be tested.

For best results, use a phase stable Test Port Extension Cable (see Optional Accessories). If you use a typical laboratory cable to extend the port to the device under test, cable bending subsequent to the OSL calibration will cause uncompensated phase reflections inside the cable. Thus, cables which are NOT phase stable may cause measurement errors that are more pronounced as the test frequency increases.

Site Master

test

For optimum calibration, Anritsu recommends using precision calibration components.

1-9

Chapter 1 General Information

Annual Verification

Anritsu recommends an annual calibration and performance verification of the Site Master and the OSL calibration components by local Anritsu service centers. Anritsu service centers are listed in Table 1-2 beginning on the following page.

The Site Master itself is “self calibrating”, meaning that there are no field-adjustable components. However, the OSL calibration components are crucial to the integrity of the calibration and therefore, must be verified periodically to ensure performance conformity. This is especially important is the OSL calibration components have been accidentally dropped or over-torqued.

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Chapter 1 General Information

Table 1-2. Anritsu Service Centers (1 of 2)

UNITED STATES

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

ANRITSU 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 ELECTRONICA LTDA. Praia de Botafogo 440, Sala 2401 CEP 22250-040,Rio de Janeiro,RJ, Brasil Telephone: 021-28-69-141 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 Beijing Fortune Building 416W, 5 Dong San Huan Bei Lu Chaoyang qu Beijing 100004, 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: 0211-96 85 50 FAX: 0211-96 85 555

INDIA

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

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Chapter 1 General Information

Table 1-2. Anritsu Service Centers (2 of 2)

ISRAEL

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

ITALY

ANRITSU Sp.A Rome 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 (AWK) #901 Daeo Bldg. 26-5 YeoidoDong, Youngdeungpo Seoul Korea 150 010 Telephone: 02-782-7156 FAX: 02-782-4590

SINGAPORE

ANRITSU (SINGAPORE) PTE LTD 3 Shenton Way #24-03 Shenton House Singapore 0106 Telephone: 022-65-206 FAX: 022-65-207

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 Botvid Center S-145 84 Stockholm, Sweden Telephone: (08) 534-717-00 FAX: (08)534-717-30

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

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Chapter 1 General Information

This page intenionally blank.

1-13

Site Master S251A

Figure 2-1. Site Master Controls and Connectors

2-0

Chapter 2 Connectors and Controls

Introduction

This chapter provides a description of each Site Master control and connector. In addition, this chapter contains listings of the LCD icon symbols and error messages and instructions for printing a screen.

Test Panel Connectors

The connectors and indicators located on the test panel are listed and described below.

12.5-15VDC (600 mA)

Battery Charging

External Power

Serial Interface

Provides input for battery charging the unit. Input is

12.5 to 15 Vdc @ 600 mA.

Indicator light to show that the battery is being charged. (Indicator automatically shuts off when the battery is fully charged.)

Indicator light to show that the Site Master is being powered by the external charging unit.

Provides an RS232 DB9 interface with a Com Port on a personal computer (for use with the Anritsu

2-1

Chapter 2 Connectors and Controls

Software Tools program). Also provides an interface to a HP Deskjet 340 printer or a Seiko DPU-411/ DPU-414 Thermal printer.

Refl Test Port

Trans Test Port

RF Det Provides RF detector input for the Power Monitor.

Provides RF output, 50W impedance.

Provides RF input, 50W impedance.

Keypad Controls

The next five pages contains an alphabetical listing of the Site Master front panel keypad controls along with a brief description of each.

Turns the liquid crystal display (LCD) back-lighting ON or OFF. (Leaving back lighting off conserves battery power.)

AUTO SCALE

CAL Displays the calibration configuration—the type of

Automatically scales the display for optimum resolution.

calibration, the frequency range, the valid temperature range of the calibration, and the current temperature.

ENTER Implements certain menu and key selections.

2-2

Chapter 2 Connectors and Controls

ESCAPE CLEAR

MARKER Calls up the Markers Menu, described on page 2-23.

OFF

PRINT Prints the current display to the selected printer.

RECALL DISPLAY

RECALL SETUP

Exits the present operation and/or clears the display. If a parameter is being edited, pressing this key will clear the value currently being entered and restore the last valid entry. Pressing this key again will close the parameter. During normal sweeping, pressing this key will move up one menu level.

Turns the Site Master on or off. When turned on, the system state at the last turn-off is restored. If the ESCAPE/CLEAR key is held down, the factory preset state is restored.

Recalls a previously saved trace from memory location 1 through 50. When the key is pressed, “Recall display:” appears on the display. Select an appropriate number from the keypad and press the ENTER key to implement.

Recalls a previously saved setup from memory location 0 through 4. When the key is pressed, “Recall Setup:” appears on the display. Select an appropriate number using the Up/Down Arrow key and press the ENTER key to implement. Setup 0 recalls the factory preset state.

RUN

HOLD

When in the Hold mode, this key starts the Site Master sweeping and provides a Single Sweep Mode

trigger; when in the Run mode, it pauses the sweep.

2-3

Chapter 2 Connectors and Controls

When in the Hold mode, the hold symbol (Table 2-1, page 2-30) appears on the left side of the LCD. (HOLD conserves considerable battery power.)

+/– When in the Gain/Insertion Loss measurement mode,

the +/– key is used in conjunction with the Scale Menu to toggle the top, bottom, and limit numerical value sign. A negative numeric value is generated by pressing the +/– key after the number is entered.

SAVE DISPLAY

CAUTION:The selected memory location will be over-

written by the SAVE DISPLAY operation. No warning is given.

Saves the displayed trace to 1 of 50 internal non-volatile memory locations. When the key is pressed, the next available empty memory location appears on the display (i.e. "Save display 3”). Press ENTER to save to the current empty memory location or select an appropriate number from the keypad or use the Up/Down Arrow key and press the ENTER key to implement. Use the keypad or the Up/Down Arrow key to manually enter the Time, Date, and Trace Designator for each saved display.

To erase saved displays select 0 and press ENTER. Individual displays may be selected and erased by entering the display number and pressing ENTER. Selecting display 0 will erase all saved displays.

2-4

Chapter 2 Connectors and Controls

SAVE SETUP

Saves the current system setup to 1 of 4 internal non-volatile memory locations. When the key is pressed, “Save Setup:” appears on the display. Select an appropriate number using the Up/Down Arrow key and press the ENTER key to implement.

CAUTION:The selected memory location will be overwritten by the SAVE SETUP operation. No warning is given.

SCALE Calls up the Scale Menu, described on page 2-14.

START CAL

Follow the text in the message area that instructs you to do the following:

q Connect OPEN to REFL port, Press ENTER

The Site Master then measures the calibration “open” that you must attach to the end of the Refl test port.

Connect SHORT to REFL port, Press ENTER

The Site Master then measures the calibration “short” that you must attach to the end of the Refl test port.

Connect LOAD to REFL port, Press ENTER

The Site Master then measures the 50W termination (load) that you must attach to the end of the Refl test port.

2-5

Chapter 2 Connectors and Controls

Connect LOAD to REFL and TRANS ports,

press ENTER

The Site Master then measures the isolation (50W termination load) that you must attach to the end of the Refl test port and the Trans test port.

Connect REFL port to TRANS port, Press

ENTER

The Site Master then measures the through "transmission” that you must attach from the Refl test port to the Trans test port.

NOTE: The combined measurements of an open, a short, a known-impedance load, a through, and an isolation normalizes the measurement system, to account for uncertainties introduced by measurement-system components (e.g., cables, connectors, etc.).

Up/Down Arrow Key

Increments or decrements a parameter value.

NOTE: At turn on, before any other keys are pressed, the Up/Down Arrow Key may be used to adjust display contrast.

2-6

MODE

Display Area

M essage A rea

FREQ

SCALE

Chapter 2 Connectors and Controls

AUTO SCALE

CAL

RECALL SETUP

MARKER

RECALL DISPLAY

PRIN T

ESCAPE

RUN/HOLD

OPT

START CAL

SAVE SETUP

SCALE

SAVE DISPLAY

ON OFF

CLEAR

ENTER

+/-

Soft Key

Labels

Soft Keys

Figure 2-2. Site Master Front Panel Display Layout

Soft Keys and Menus

Each of the soft keys has a corresponding soft key label area on the display. The label identifies the function of the soft key for the current menu selection.

Figure 2-3, on the following page, shows the menu structure, the soft key labels for each menu selection, and the page where a description of the menu can be found.

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+ 78 hidden pages

Anritsu S251A User Manual

Table of Contents