Anritsu S251B User Manual

Site Master

Model S251B

Antenna and

Cable Analyzer

User's Guide

Hand-Held Tester for Transmission Lines

and other RF Components

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 defec tive during the warranty period. Buyers shall prepay transportation charges for equipment returned to Anritsu for warranty repairs. Obligation is limited to the origi nal 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 op eration 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 ACKNOWLEDGMENTS

MS-DOS, Windows, Windows 95, Windows NT, and Windows 98 are registered trademarks of the Microsoft Corporation. Anritsu and Site Master 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.

September 1999 10580-00032 Copyright ã 1999 Anritsu Co. Revision: A

Chapter 1 - General Information 1-1

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

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

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

Options ....................................1-2

Optional Accessories .............................1-2

Performance Specifications .........................1-3

Preventive Maintenance ...........................1-6

Calibration ..................................1-7

Annual Verification..............................1-7

Chapter 2 - Getting Started 2-1

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

Charging a New Battery ...........................2-1

Charging the Battery in the Site Master .....................2-1

Charging the Battery in the Optional Charger..................2-1

Battery Charge Indicator ..........................2-2

Discharging the NiMH Battery .......................2-3

Battery Life ..................................2-3

Important Battery Information .......................2-3

Chapter 3 - Functions and Operations 3-1

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

Front Panel Overview ............................3-1

Test Connector Panel.............................3-2

Keypad Controls ...............................3-3

Soft Keys ...................................3-6

Power Monitor Menu ............................3-20

Printing....................................3-21

Printing a Screen .................................3-21

Printer Switch Settings ..............................3-22

Symbols ...................................3-23

Self Test ...................................3-23

Error Codes .................................3-24

Self Test Errors ..................................3-24

Range Errors ...................................3-25

Using the Soft Carrying Case........................3-28

Chapter 4 - Measurements 4-1

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

Measurement Functions ...........................4-1

Power On Procedure .............................4-2

Calibration Procedure ............................4-2

Selecting the Frequency Range ..........................4-3

Performing a Calibration .............................4-3

Setting the Amplitude Scale ............................4-4

Saving the Setup ..................................4-4

Recalling a Setup ..................................4-4

Saving a Display to Memory ............................4-5

Recalling a Display From Memory ........................4-5

SWR (Return Loss) and Cable Loss Measurement ............4-9

Required Equipment ................................4-9

Device-Under-Test Specification..........................4-9

Procedure ......................................4-9

Selecting the Measurement Mode .........................4-9

Selecting the Frequency Range ..........................4-9

Performing a Calibration.............................4-10

SWR or Return Loss Measurement .......................4-11

Set the Amplitude Scale and Limit Line.....................4-11

Setting the Markers ................................4-13

Cable Loss Measurement ..........................4-14

Setting the Amplitude Scale ...........................4-14

Setting the Segment Limit LInes .........................4-14

DTF Measurement .............................4-16

Required Equipment ...............................4-16

Device-Under-Test Specification .........................4-16

Procedure .....................................4-16

Selecting the Measurement Mode ........................4-16

Performing a Calibration.............................4-17

DTF Measurement (Determining the Length of the Cable) ..........4-18

Setting the Amplitude Scale ...........................4-18

Setting the Marker ................................4-18

DTF Measurement (Determining the quality of the cable.) ..........4-20

Setting the Amplitude Scale ...........................4-20

Setting the Markers ................................4-20

Insertion Gain (Amplifier) Measurement .................4-22

Required Equipment ...............................4-22

Device-Under-Test Specification .........................4-22

Procedure .....................................4-22

Selecting the Measurement ............................4-22

Selecting the Frequency Range..........................4-22

Performing a Calibration.............................4-22

Amplifier Gain Measurement ..........................4-24

Setting the Markers ................................4-24

Activating the Bias Tee ..............................4-25

Setting the Amplitude Scale ...........................4-25

Making Power Measurements .......................4-27

Entering Power Monitor Mode..........................4-27

Zeroing the Power Monitor............................4-27

Measuring High Input Power Levels.......................4-27

Displaying Power in dBm and Watts ......................4-27

Displaying Relative Power ............................4-27

Chapter 5 - Software Tools Program 5-1

Description ..................................5-1

Requirements .................................5-1

Communication Port Setting.........................5-1

Changing COM Port Settings–Windows 95/98/NT ...............5-1

Software Installation .............................5-3

Plot Capture..................................5-3

Capture multiple traces to a database.......................5-4

Capture single or multiple traces to PC screen..................5-4

Custom Cable List Uploading and Downloading..............5-5

Uploading a Cable List to the Site Master Custom Cable Table ........5-5

Downloading a Cable List from the Site Master Custom Cable Table .....5-5

Saving a Custom Cable List ............................5-5

Program Operation..............................5-6

Fault Location Software ...........................5-6

Smith Chart Software ............................5-6

Saving a Plot as a Windows Metafile or as a Spreadsheet File ......5-7

Pasting a Plot in Graphic or Spreadsheet Format .............5-7

Saving Data to a Database ..........................5-7

“Drag-n-Drop” ................................5-7

Printing ....................................5-8

Appendix A - Reference Data A-1

Coaxial Cable Technical Data........................A-1

iii/iv

Chapter 1 General Information

Introduction

This chapter provides a description, performance specifications, optional accessories, pre ventive maintenance, and calibration requirements for the Site Master model S251B. Throughout this manual, the term Site Master will refer to the S251B.

Model

S251B 625 to 2500 MHz 2

Frequency Range Ports

Description

The Site Master is a hand held SWR/RL (standing wave ratio/return loss), transmission gain/loss and Distance-To- Fault (DTF) measurement instrument that includes a built-in synthesized signal source. All models include a keypad to enter data and a liquid crystal display (LCD) to provide graphic indications of SWR, RL or dB over the selected frequency range and SWR or RL over the selected distance. The Site Master is capable of up to 2.5 hours of continuous operation from a fully charged field-replaceable battery and can be operated from a 12.5 dc source. Built-in energy conservation features can be used to extend battery life over an eight-hour work day.

The Site Master is designed for measuring SWR, return loss, or one-port cable insertion loss and locating faulty RF components in antenna systems. Power monitoring is available as an option. Site Master model S251B includes transmission gain or loss (S21) measurements and an optional built-in bias tee. The displayed trace can be scaled or enhanced with frequency markers 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

The Software Tools PC-based software program provides a database record for storing measurement data. Site Master Software Tools can also convert the Site Master display to a Microsoft Windowsä 95/98/NT workstation graphic. Measurements stored in the Site Mas ter internal memory can be downloaded to the PC using the included null-modem serial ca ble. Once stored, the graphic trace can be displayed, scaled, or enhanced with markers and limit lines. Historical graphs can be overlaid with current data, and underlying data can be extracted and used in spreadsheets or for other analytical tasks.

The Site Master Software Tools program also performs DTF (Distance To Fault) and Fault Location.

1-1

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,

CDROM disk containing the Software Tools program. This program contains Fault Lo

cation (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 10A ¾ Add Bias Tee

Optional Accessories

Anritsu Precision N (m) Open/Short/Load, 42 dB, Part No. OSLN50LF

Anritsu Precision N (f) Open/Short/Load, 42 dB, Part No. OSLNF50LF

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

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

Armored Test Port Extension Cable, 1.5 meter, N (m) to N (f), Part No. 15NNF50-1.5A

1-2

Armored Test Port Extension Cable, 3.0 meter, N (m) to N (f), Part No. 15NNF50-3.0A

Armored Test Port Extension Cable, 5.0 meter, N (m) to N (f), Part No. 15NNF50-5.0A

Chapter 1 General Information

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

N (m), Part No. 15NN50-1.5A Armored Test Port Extension Cable, 3.0 meter, N (m) to

N (m), Part No. 15NN50-3.0A Armored Test Port Extension Cable, 5.0 meter, N (m) to

N (m), Part No. 15NN50-5.0A Armored Test Port Extension Cable, 1.5 meter, N (m) to

7/16 DIN (f), Part No. 15NDF50-1.5A Armored 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

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

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-414 Printer), Part No. 2000-10012

Thermal Paper (use with the DPU-411/DPU-414 Printer), Part No. 2000-755

Rechargeable Battery, NiMH Part No. 633-27

Battery Charger, NiMH only Part No. 2000-1029

Performance Specifications

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

1-3

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

Site Master: Frequency Range:

S251B 625 to 2500 MHz Frequency Accuracy (RF Source Mode): 75 parts per million @ 25°C* Frequency Resolution: 10 kHz SWR:

Range Resolution

Return Loss:

Range Resolution

**Distance-To-Fault (DTF):

Range (in meters) Resolution (in meters) (Rectangular Windowing)

Insertion Loss/Gain

Range: Resolution

RF Source

Frequency Power Output (nominal)

Wattmeter Power Monitor:

Range Offset Range

Resolution

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

up to the level of: RF Out

RF In

Maximum Input (Damage Level):

Test Port, Type N RF Detector

Measurement Accuracy: Measurement accuracy depends on calibration components. Precision calibration load provides a corrected directivity of 42 dB.

Cable Insertion Loss:

Range Resolution

1.00 to 65.00

0.01

0.00 to 54.00 dB

0.01 dB

0 to (Resolution x dp)

(. )( )15 108´ V

Where V the cable . dp is the number of data points (128, 256,

512). DF is F2 - F1 (in Hz.)

–120.00 to 100.00 dB

0.01 dB

625 to 2500 MHz @ 10 kHz step selectable, – 30 dBm or+6dBm

–80.0 to +80 dBm or

10.0 pW to 100.0 kW 0 to +60.0 dB

0.1 dB or

0.1 xW

+10 dBm, reflection + 30 dBc transmission

+22 dBm +20 dBm

0.00 to 54.00 dB

0.01 dB

is the relative propagation velocity of

Value

1-4

Chapter 1 General Information

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

Bias Tee

input voltage: output current:

General Internal Memory:

Trace Memory

Instrument config. RS-232

Electromagnetic Compatibility Meets European community requirements for

Power Supply:

External DC Input +12.5 to +15 Vdc, 1100 mA max.

Temperature:

Storage

Operation Weight: 1.82 kg (4.0 pounds) Dimensions: 25.4 x 17.8 x 6.1 cm

* ±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 interfering signal exactly at the same frequency (worst case situation). Typical immunity is better when swept frequency is used.

12.5 to 15.0 Vdc 270 ma maximum surge, 25 ms 240 ma maximum steady

200 maximum 10 setup locations with associated calibration 9 pin D-sub, three wire serial

CE marking

–20° C to 75° C

0° C to 50° C

(10x7x2.4inches)

1-5

Chapter 1 General Information

Preventive Maintenance

Site Master preventive maintenance consists of cleaning the unit and inspecting and clean ing 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 abra sive cleaners.

Clean the RF connectors and center pins with a cotton swab dampened with denatured alco hol. 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 the 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.

1-6

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) or Open-Short-Load-Through (OSLT) calibration should be per formed 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 right side of the LCD screen, that the in ternal temperature has exceeded a safety window, and the user is advised to perform an other OSL or OSLT calibration in order to maintain the integrity of the measurement.

NOTES: For best calibration results—compensation for all measurement uncertain ties—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 Site Master test port to the device under test, cable bending subsequent to the OSL or OSLT 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.

For optimum calibration, Anritsu recommends using precision calibration components.

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 on the following page.

The Site Master itself is self-calibrating, meaning that there are no field-adjustable compo nents. However, the OSL calibration components are crucial to the integrity of the calibra tion 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.

1-7

Chapter 1 General Information

Table 1-2. Anritsu Service Centers

UNITED STATES

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

1-800-ANRITSU

FAX: 408-776-1744

ANRITSU COMPANY 10 New Maple Ave., Unit 305 Pine Brook, NJ 07058 Telephone: (201) 227-8999,

1-800-ANRITSU

FAX: 201-575-0092

ANRITSU COMPANY 1155E. Collins Blvd Richardson, TX 75081 Telephone: 1-800-ANRITSU FAX: 972-671-1877

AUSTRALIA

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

BRAZIL

ANRITSU ELECTRONICALTDA. 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: 011065909237 FAX: 011065909236

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

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 CORPORATION LTD. #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 12 Surrey Square Office Park 330 Surrey Avenue Ferndale, Randburt, 2194 South Africa Telephone:01-11-787-7200 Fax: 01-11-787-0446

SWEDEN

ANRITSU AB Botvid Center S-1585 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

1-8

Chapter 2 Getting Started

Introduction

The Nickel Metal Hydride (NiMH) Battery supplied with the Site Master is shipped in a discharged state. Before using the Site Master, the internal battery must first be charged for three hours, either in the Site Master or in the optional battery charger (Anritsu part num ber: 2000-1029).

Charging a New Battery

New batteries normally require three to five charge and discharge cycles before attaining maximum performance. The NiMH battery supplied with the Site Master has already com pleted three charge and discharge cycles at the factory and full battery performance should be realized after your first charge.

Charging the Battery in the Site Master

The battery can be charged while still installed in the Site Master.

Step 1. Turn the Site Master off. Step 2. Connect the AC-DC adapter (Anritsu part number: 40-115) to the Site Master

charging port.

Step 3. Connect the AC adapter to a 120 VAC or 240 VAC power source as appropriate

for your application.

The green external power indicator on the Site Master will illuminate, indicating the presence of external DC power and the battery will begin charging. The indi cator will remain lit as long as the battery is charging. Once the battery is fully charged, the battery indicator will turn off. If the battery fails to charge, contact your nearest Anritsu service center.

Charging the Battery in the Optional Charger

Up to two batteries can be charged simultaneously in the optional battery charger.

Step 1. Remove the NiMH battery from your Site Master and place it in the optional

charger (Anritsu part number: 2000-1029).

Step 2. Connect the lead from the AC-DC adapter to the charger. Step 3. Connect the AC-DC adapter to a 120 VAC or 240 VAC power source as appro

priate for your application.

Each battery holder in the optional charger has an LED charging status indicator. The LED color changes as the battery is charged:

Red indicates the battery is charging Green indicates the battery is fully charged Yellow indicates the battery is in a waiting state (see below).

2-1

Chapter 2 Getting Started

A yellow light may occur because the battery became too warm during the charge cycle. The charger will allow the battery to cool off before continuing the charge. A yellow light may also indicate that the charger is alternating charge to each of the two batteries.

A blinking red light indicates less than 13 VDC is being supplied to the charger stand. Check that the correct AC charger adapter is connected to the charger stand.

If a battery fails to charge, contact your nearest Anritsu Service Center.

You can charge the battery anytime. However, NiMH battery will last longer and perform better if allowed to completely discharge before recharging. For maximum battery life, it is recommended that the NiMH battery be completely discharged and recharged once every three months.

Battery Charge Indicator

When the AC-DC adapter is unplugged from the Site Master, the battery indicator symbol will be continuously displayed at the top left corner of the Site Master display (Figure 2-1).

Battery Indicator

625.0

1384.45 MHz

2096.66 MHz

MODE

FREQ/DIST

Site Master S251B

2500.0

AMPLITUDE

SWEEP

START CAL

SAVE SETUP

LIMIT

SAVE DISPLAY

ON OFF

AUTO SCALE

RECALL SETUP

MARKER

RECALL DISPLAY

ESCAPE

CLEAR

ENTER

RUN

HOLD

SYS

Figure 2-1. Site Master Battery Indicator

A totally black bar indicates a fully charged battery. When

LOW BATT replaces the battery

indicator bar at the top left corner, a couple of minutes of measurement time remains. If a flashing

LOW BATT is accompanied by an audio beep at the end of each trace, the battery

has approximately one minute of useable time remaining.

2-2

Chapter 2 Getting Started

The battery status can also be checked by pressing the SYS key and the STATUS soft key. The Status table will display the remaining battery charge as a percent, as shown below.

STATUS

OSL CALIBRATION

FREQUENCY = 2.0 – 1000 MHz CAL TEMPERATURE (24–54° C)

CURRENT TEMPERATURE = 38° C BATTERY CHARGE = 75%

PRESS ESCAPE TO CONTINUE

Figure 2-2. Example Status Table Display

Once all the power has drained from the battery, the Site Master display will fade. At this point, your Site Master will switch itself off and the battery will need to be recharged.

Discharging the NiMH Battery

The NiMH battery will last longer and perform better if allowed to completely discharge before recharging. For maximum battery life, it is recommended that the NiMH battery be completely discharged and recharged once every three months.

To discharge the battery, leave the Site Master switched on until the battery is drained. The Site Master will display a gins to run low. Allow the battery to fully discharge until the Site Master switches itself off.

NOTE: Do not attempt to discharge the battery by any other means. Never short-circuit the battery terminals.

LOW BATT message and an audio warning when the battery be-

Battery Life

It is normal for NiMH batteries to self-discharge during storage. To minimize battery dis charge during storage, it is recommended that the battery be removed from the Site Master if the Site Master is not to be used for a long period of time.

It is normal for NiMH battery to degrade to 80% of original capacity after 12 months of continuous use.

The battery can be charged and discharged 300 to 500 times, but it will eventually wear out. The battery may need to be replaced when the operating time between charging is notice ably shorter than normal.

Important Battery Information

2-3

Chapter 2 Getting Started

With a new NiMH battery, full performance is achieved after three to five complete

charge and discharge cycles. Use only Anritsu approved battery packs.

Recharge the battery only in the Site Master or in an Anritsu approved charger.

When the Site Master or the charger is not in use, disconnect it from the power source.

Do not charge batteries for longer than 24 hours; overcharging may shorten battery life.

If left unused a fully charged battery will discharge itself over time.

Discharge an NiMH battery from time to time to improve battery performance and bat

tery life. The battery can be charged and discharged hundreds of times, but it will eventually wear

out. The battery may need to be replaced when the operating time between charging is notice

ably shorter than normal. Do not short-circuit the battery terminals.

Do not drop, mutilate or attempt to disassemble the battery.

Never use a damaged or worn out charger or battery.

Always use the battery for its intended purpose only.

Temperature extremes will affect the ability of the battery to charge: allow the battery to

cool down or warm up as necessary before use or charging.

Storing the battery in extreme hot or cold places will reduce the capacity and lifetime of the battery.

Do not dispose of batteries in a fire!

Batteries must be recycled or disposed of properly. Do not place batteries in garbage.

2-4

Chapter 3

Functions and Operations

Introduction

This chapter provides a brief overview of the Site Master functions and operations, provid ing the user with a starting point for making basic measurements. For more detailed infor mation, refer to Chapter 4, Measurements and Chapter 5, Software Tools.

The Site Master is designed specifically for field environments and applications requiring mobility. As such, it is a lightweight, handheld, battery operated unit which can be easily carried to any location, and is capable of up to 2.5 hours of continuous operation from a fully charged battery. Built-in energy conservation features allow battery life to be extended over an eight-hour workday. The Site Master can also be powered by a 12.5 Vdc external source. The external source can be either the Anritsu AC-DC Adapter (P/N 40-115) or 12.5 Vdc Automotive Cigarette Lighter Adapter (P/N 806-62). Both items are standard accesso ries.

Front Panel Overview

The Site Master menu-driven user interface is easy to use and requires little training. Mode, Frequency, Amplitude and Sweep function keys are located just below the display and are easily configured for optimum measurements. Selection of one of these keys brings up a function-specific menu on the right hand side of the display. The softkeys adjacent to the display provide access to the various menu items (See Figure 3-1).

625.0

1384.45 MHz

2096.66 MHz

MODE

FREQ/DIST

Figure 3-1. Site Master Soft Keys

Site Master S251B

2500.0

AMPLITUDE

SWEEP

START CAL

SAVE SETUP

LIMIT

SAVE DISPLAY

OFF

ESCAPE

CLEAR

AUTO SCALE

RECALL SETUP

MARKER

ENTER

RECALL

RUN

DISPLAY

HOLD

SYS

SOFT KEY

3-1

Chapter 3 Functions and Operations

Test Connector Panel

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

12.5-15VDC (1100 mA)

When using the AC-DC Adapter, always use a three-wire power cable connected to a three-wire power line outlet. If power is supplied without grounding the equip ment in this manner, there is a risk of receiving a severe or fatal electric shock.

Battery Charging

External Power

Serial Interface

RF Out RF output, 50 W impedance, for reflection measurements.

RF In RF input 50 W impedance for transmission loss or gain measurement.

RF Detector RF detector input for the Power Monitor.

12.5 to 15 Vdc @ 1100 mA input to power the unit or for battery charging.

WARNING

Illuminates when the battery is being charged. The indicator automatically shuts off when the battery is fully charged.

Illuminates when the Site Master is being powered by the external charging unit.

RS232 DB9 interface to a COM port on a personal computer (for use with the Anritsu Software Tools program) or to a supported printer.

3-2

Chapter 3 Functions and Operations

Keypad Controls

This section contains an alphabetical listing of the Site Master front panel keypad controls along with a brief description of each. More detailed descriptions of the major function keys follow.

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

LCD Contrast adjust. Use the Up/Down arrow key and play contrast.

AMPLITUDE Displays the amplitude or scale menu of the current operating mode.

NOTE: The AMPLITUDE and LIMIT keys are functionally identical.

AUTO SCALE

ENTER Implements certain menu and key selections.

ESCAPE

CLEAR

FREQ/DIST Displays the Frequency or Distance menu depending on the measurement mode.

LIMIT Displays the amplitude or scale menu of the current operating mode.

MARKER Displays the marker menu of the current operating mode.

Automatically scales the display for optimum resolution.

Exits the present operation 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.

ENTER to adjust the dis

MODE Opens the mode selection box (below). Use the Up/Down arrow key to select a

mode. Press the

MEASUREMENT MODE

FREQ - SWR

DTF - SWR

POWER MONITOR RF SOURCE

Figure 3-2. Mode Selection Box

ENTER key to implement.

RETURN LOSS

CABLE LOSS - ONE PORT INSERTION LOSS (+6 dBm) INSERTION LOSS (–30 dBm)

RETURN LOSS

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Chapter 3 Functions and Operations

OFF

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.

PRINT Prints the current display to the selected printer via the RS232 serial port.

RECALL DISPLAY

Recalls a previously saved trace from memory. When the key is pressed, a Re call Trace selection box appears on the display. Select a trace using the Up/Down arrow key and press the

To erase a saved trace, highlight the trace and select the

ENTER key to implement.

DELETE TRACE

softkey. To erase all saved traces, select the DELETE ALL TRACES softkey.

RECALL SETUP

Recalls a previously saved setup from memory location 1 through 10. When the key is pressed, a setup using the Up/Down arrow key and press the

RECALL SETUP selection box appears on the display. Select a

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. When in the Hold mode, the hold symbol (page 3-23) appears on the LCD. Hold mode conserves battery power.

SAVE DISPLAY

Saves up to 200 displayed traces to non-volatile memory. When the key is pressed,

TRACE NAME: appears in the lower left of the display. Save the dis-

play with up to 16 alphanumeric characters for that trace name and press the

ENTER key to implement.

SAVE SETUP

START CAL

Saves the current system setup to 1 of 10 internal non-volatile memory locations. When the key is pressed, a play. Use the Up/Down arrow key to select a setup and press the

SAVE SETUP selection box appears on the dis-

ENTER key to

implement.

Starts the calibration in SWR, Return Loss, Cable Loss, insertion loss, insertion gain, or DTF measurement modes. Follow the text in the lower left message area that instructs you to do the following:

CONNECT OPEN TO RF out PORT, Press ENTER

The Site Master then measures the calibration “open” that you must attach to the end of the test port or to the end of the test port cable attached to the RF Out port.

CONNECT SHORT TO RF out PORT, Press ENTER

The Site Master then measures the calibration “short” that you must attach to the end of the test port or to the end of the test port cable attached to the RF Out port.

CONNECT LOAD TO RF out PORT, Press ENTER

The Site Master then measures the 50W load that you must attach to the end of the test port or to the end of the test port cable attached to the RF Out port.

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Chapter 3 Functions and Operations

NOTE: The combined measurements of an open, a short, and a known-impedance load normalizes the measurement system to account for uncertainties intro

duced by measurement-system components (e.g., cables, connectors, etc.).

CONNECT LOADS TO RF Out PORT and RF In PORT, Press ENTER.

The Site Master then measures the isolation between the RF Out port and the RF In port, or between the test port cables attached to the RF Out and RF In ports.

CONNECT RF Out PORT to RF In PORT, Press ENTER.

The Site Master then measures the through path between the RF Out port and the RF In port, or between the ends of the test port cables connected to the ports.

SWEEP Displays the Sweep function soft key menu for the current operating mode.

SYS Displays the System menu softkey selections.

Up/Down Arrow Key

Increments or decrements a parameter value or chooses an item from a list which can then be selected with the

ENTER key.

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

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Chapter 3 Functions and Operations

Soft Keys

Each keypad key opens a set of soft key selections. Each of the soft keys has a correspond ing soft key label area on the display. The label identifies the function of the soft key for the current Mode selection.

NOTE: The AMPLITUDE and LIMIT keys are functionally identical.

Figures 3-3 through 3-8 show the soft key labels for each Mode selection.

FREQ/DIST

AMPLITUDE

TOP

BOTTOM

LIMIT

LIMIT BEEP

ON/OFF

EDIT

SEGMENT

SWEEP

RESOLUTION

SINGLE SWEEP

TRACE

MATH

TRACE

OVERLAY

ON/OFF

130

259

517

SCROLL

SEGMENT

SELECT

SEGMENT

BACK

Figure 3-3. Frequency Mode Soft Key Labels

FULL

SPAN

TOP OF

LIST

PAGE

DOWN

BOTTOM

LIST

DELETE

TRACE

DELETE

ALL

TRACES

SELECT

TRACE

BACK

3-6

MODE=POWER MONITOR:

Chapter 3 Functions and Operations

SOFTKEYS:

Figure 3-4. Power Monitor Mode Soft Key Labels

UNITS

REL

OFFSET

ZERO

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Chapter 3 Functions and Operations

FREQ/DIST

DTF AID

LOSS

PROP

VEL

CABLE

WINDOW

ON/OFF

EDIT

SEGMENT

SCROLL

SEGMENT

FULL SPAN

SELECT

SEGMENT

BACK

AMPLITUDE

TOP

BOTTOM

LIMIT

LIMIT BEEP

TOP OF

LIST

PAGE

DOWN

BOTTOM

LIST

SWEEP

RESOLUTION

SINGLE SWEEP

TRACE

MATH

TRACE

OVERLAY

ON/OFF

SELECT

TRACE

BACK

Figure 3-5. Distance to Fault Mode Soft Key Labels

3-8

DELETE

TRACE

DELETE

ALL

TRACES

+ 58 hidden pages

Anritsu S251B User Manual

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