Tektronix NetTek YBT250 Rev A User manual

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NetTek®YBT250 Field Transmitter & Interference Tester

ZZZ

Quick Start User Manual

Revision A

www.tektronix.com

071-2409-01

Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Speciﬁcations and price change priv ileges reserved.

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

NetTek is a registered trademark of Tektronix, Inc.

Contacting Tektronix

Tektronix, Inc. 14200 SW Karl Braun Drive P.O . B o x 5 0 0 Beaverton, OR 97077 USA

For product information, sales, service, and technical support:

In North Am erica, call 1-800-833-9200. Worldwide, visit www.tektronix.com to ﬁnd contacts in your area.

Warranty 2

Tektronix warrants that this product will be free from defects in materials and workman ship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. Parts, modules and rep lacement products used by Tektronix for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.

In order to obtain servic e under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance o f service. Customer shall be responsible for packaging and shipping the defective product to the s ervice center designated by Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warra nty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modiﬁed or integrated with other products when the effect of such modiﬁcation or integration increases the time or difﬁculty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WIT H RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

Table of Contents

General Safe ty Summary .. . ............................................................................................................... iii

Environmental Considerations ............................................................................................................. vi

Preface..................................................................................................................................... vii

Key Features......................................................................................................................... vii

Documentation....................................................................................................................... viii

Software Upgrades ................................................................................................................... ix

Conventions Used in This Manual.................................................................................................... ix

Preventing Personal Injury from Lightning ............................................................................................ x

Installation .................................................................................................................................. 1

YBT250 Standard Accessories ....................................................................................................... 1

Operating Considerations ............................................................................................................ 2

Connecting the AC Adapter . ......................................................................................................... 4

Charging the Batteries................................................................................................................ 5

Powering On and Off the Instrument, and Functional Veriﬁcation................................................................... 6

Touch Screen Concepts .............................................................................................................. 7

Calibrate the Touch Screen........................................................................................................... 8

Starting the YBT250 Application..................................................................................................... 10

Setting Display Colors ............................................................................................................... 11

Enabling Signal Standards .......................................................................................................... 12

Table of Contents

NetTek

YBT250 Quick Start User Manual i

Table of Contents

Getting Acquainted with Your Instrument ................................................................................................. 15

Operating Basics .......................................................................................................................... 27

Instrument Elements................................................................................................................. 15

PowerOn/Standby and Status Panel ............................................................................................... 16

Input/Output Co nnectors (NetTek Y400 Platform) . ................................................................................. 17

NetTek YBT 250 Module Signal Connectors. ........................................................................................ 18

Microsoft WindowsCE Elements . ................................................................................................... 18

The User Interface ................................................................................................................... 19

The Command Bar...................................................................................................................20

The Tuning Controls ................................................................................................................. 21

The External Signal Status Buttons ................................................................................................. 22

The Measurement Mode Buttons.................................................................................................... 23

The Parameter Entry Controls.......................................................................................................24

Getting Help.......................................................................................................................... 25

Setting Up to Take a Measurement ................................................................................................. 27

Signal Measurements................................................................................................................ 32

Spectrum Measurements............................................................................................................34

Interference Measurements ......................................................................................................... 45

Displaying Multiple Measurements..................................................................................................57

Speciﬁcations.............................................................................................................................. 59

Certiﬁcations and Compliances ..................................................................................................... 88

Index

ii NetTek

YBT250 Quick Start User Manual

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to t his product or any products connected to it.

To avoid potential hazards, use this product only as speciﬁed.

Only qualiﬁed personnel should pe rform service procedures.

While using this product, you may need to access other parts of a larger system. Read the safety sections of the other component manuals for warnings and cautions related to operating the system.

To Avoid Fire or Personal Injury

Use Proper Power Cord. Use only the power cord speciﬁed for this product and certiﬁed for the country of use.

Observe All Terminal Ratings. To avoid ﬁre or shock hazard, observe all ratings and markings on the product. Consult the

product manual for further ratings information before making connections to the product.

The inputs are not rated for connection to mains or Category II, III, or IV circuits.

Power Disconnect. The power cord disconnects the product from the power source. Do not block the power cord; it must remain

accessible to the user at all times.

Do Not Operate Without Covers. Do not operate this product with covers or panels removed.

Do Not Operate With Suspected Failures. If you suspect that there is damage to this product, have it inspected by qualiﬁed

service personnel.

General Safety Summary

NetTek

Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present.

Replace Batteries Properly. Replace batteries only with the speciﬁed type and rating.

YBT250 Quick Start User Manual iii

General Safety Summary

Recharge Batteries Properly. Recharge batteries for the recommended charge cycle only.

Use Proper AC Adapter. Use only the AC adapter speciﬁed for this product.

Do Not Operate in an Explosive Atmosphere.

TermsinthisManual

These terms may appear in this manual:

WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.

CAUTION. Caution sta tements identify conditions or practices that could result in damage to this product or other property.

Symbols and Terms on the Product

These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the marking.

WARNING indicates an injury hazard not immediately accessible as you read the marking.

CAUTION indicates a hazard to property including the product.

iv NetTek

YBT250 Quick Start User Manual

The following symbol(s) may appear on the product:

General Safety Summary

NetTek®YBT250 Quick Start User Manual v

Environmental Considerations

This section provides information about the environmental impact of the product.

Product End-of-Life Handling

Observe the following guidelines when recycling an instrument or component:

Equipment Recycling. Production of this equipment required the extraction and use of natural resources. The equipment may

contain substances that could b e harmful to the environment or huma n health if improp erly handled at th e product’s end of life. In order to avoid release of such substances into the environment and to reduce the use of natural resources, we encourage you to recycle this product in an appropriate system that will ensure that m ost of the materials are reused or recycled appropriately.

This symbol indicates that this product complies with the European Union’s requirements according to Directive 2002/96/EC on waste electrical and electronic equipment (WEEE). For information about recycling options, check the Support/Service section of the Tektronix Web site (www.tektronix.com).

Restriction of Hazardous Substances

This product has been classiﬁed as Monitoring and Contro l equipment, and is outside the scope of the 2002/95/EC RoHS Directive.

vi NetTek

YBT250 Quick Start User Manual

Preface

This manual describes the installation and basic op eration of the NetTek YBT250 Field Transmitter & Interference Tester. For more detailed information on individual measurements, tap the underlined link text on measurement screens to open the online help for those topics.

Key Features

The N etTek YBT250 is a rugged, multi-standard measurement and interference location tool optimized for ﬁeld use. Key features include:

Multi-standard frequency spectrum analyzer

Interference hunting functions that help ﬁnd interference quickly

Spectrogram display for detection and logging of intermittent signals

Signal strength, AM/FM demodulation, and noise ﬂoor measurements

Scanners or code analyzers for GSM/GMSK/EDGE, UMTS/W-CDMA/HSDPA, cdmaOne, cdma2000, 1xEV-DO, TD-SCDMA, and iDEN signals

Multipath signal analyzer for W-CDMA signals

User-deﬁned channels for taking general measurements and channel scans

Preface

NetTek

YBT250 Quick Start User Manual vii

Preface

Documentation

To read about Use these documents

Installation and operation (overviews) NetTek YBT250 Field Transmitter & Interference Tester Quick Start User Manual.The

Help using the application

quick start user manual contains general info rmation about how to put your instrument into service, guides to user interface controls, and application examples.

Online H elp. The online help is context sensitive, displaying information appropriate for the active screen or the selected help text. (See page 25, Getting Help.)

viii NetTek®YBT250 Quick Start User Manual

Software Upgrades

Periodic software upgrades may become available. The software is operational only if you have a valid option key for the speciﬁc application module and serial number.

To check for upgrades:

1. Go to the Tektronix Web site (www.tektronix.com).

2. Click Software Downloads on left side of the screen to link to the Software Downloads Web page.

3. Enter the product name or model number in the Search by keyword ﬁeld and click Go.

4. Scroll through the list and select the appropriate link for your instrument to show more information or to download the software.

The instructions to perform the software upgrade are in the readme.txt ﬁle that is part of the software down load.

Conventions Used in This Manual

The following icons are used in this ma nual:

Preface

Sequence Step

NetTek®YBT250 Quick Start User Manual ix

Front panel power

Connect power

Preface

Preventing Personal Injury from Lightning

WARNING. To prevent perso nal injury from the effects of lightning, exercise the following precautions when using this product:

Before connecting this produ ct to any source

Check your local weather forecast for the possibility of thunderstorms or lightn ing.

If weather conditions could allow thunderstorms or lightning to develop, be sure to visually check t he sky and weather conditions in your area frequently.

If you c an hear thunder or if you see lightning, do not connect this product to any source which m ay be exposed to the effects of lightning.

Use your own good judgement and common sense. You must protect yourself from the effects of lightning.

You must a ssume that hazardous voltages will be present on exposed surfaces of this product if it is connected to a source exposed to lightning. The insulation of this product will not protect you from these hazardous voltages.

x NetTek

YBT250 Quick Start User Manual

Do not connect this product to any source which might be subject to the effects of lightning

If thunderstorms or lightning are in your vicinity:

When weather conditions that could lead to lightning activity exist in your area, you could be at risk of a lightning strike before the cloud is close enough for you to hear thunder or see lightning.

When lightning strikes a structure or facility, current travels through rebar, concrete, pipes, cables, vent stacks, and electrical system.

Lightning can induce electric and magnetic ﬁelds into structures and portions of wiring. The length of a conductor affected by the magnetic ﬁeld of a lightning strike may exceed two miles.

Be alert and aware of the effects of lightning

When lightning strikes a conductor, which in turn introduces the current into an area some distance from the ground strike point, equipment can be damaged and personnel injured if they become an indirect path in the completion of the ground circuit.

Conductors such as the braided shields of cables or unshielded wires will have signiﬁcant transient currents ﬂowinginthem in regions exposed to the electric ﬁeld effect of lightning.

Induced voltages may cause breakdown of insulation in wiring at connectors and in electrical components or brea k down of air.

Preface

NetTek

YBT250 Quick Start User Manual xi

Preface

xii NetTek®YBT250 Quick Start User Manual

Installation

Carefully unpack your instrument and verify that it includes the standard accessories.

YBT250 Standard Accessories

Accessory Tektronix part number

NetTek YBT250 Field Transmitter & Interference Tester Application Module

NetTek YBT250 Field Transmitter & Interference Tester Quick Start User Manual

BNC Connector cover (2)

N Connector cover (1)

Spacer (1)

Your instrument may also include optional accessories. Verify that the optional accessories you ordered are included with your instrument. For a current list of accessories, upgrades, and options, including service options, available for your instrument, visit the Tektronix Web site, www.tektronix.com.

Installation

YBT250

071-1901-XX

200-0678-XX

200-4696-XX

016-2464-XX

NetTek

YBT250 Quick Start User Manual 1

Installation

Operating Considerations

Dimensions (installed on Y400)

Weight

Temperature Range

Humidity

Altitude

RF Signal Input Input frequency range: 30 MHz to 2500 MHz

Height: 25 cm. (9.75 in) Width: 33 cm. (13 in) Depth: 9 cm. (3.5 in)

1.42 kg (3.13 lbs) module only

Operating: 0 °C to +50 °C speciﬁed performance, –10 °C to +50 °C typical

Nonoperating: –40 °C to +60 °C

Operating: 5% to 95% Relative Humidity (RH), noncondensing: up to +30 °C

Nonoperating: 5% to 45% Relative Humidity (RH), noncondensing: +30 °C up to +50 °C

Operating: Up to 4,600 m (15,092 ft.)

Nonoperating: Up to 15,240 m (50,000 ft.)

Coupling: AC

Input impedance: 50 Ω (nominal)

Maximum input power without damaging instrument: 50 W CW or peak envelope power

2 NetTek®YBT250 Quick Start User Manual

Installation

Cleaning

Clean the exterior surfaces of the instrument with a dry lint-free cloth or a soft-bristle brush.

Use a cloth or swab moistened with deionized or distilled water, or a 75% isopropyl alcohol solution for more stubborn stains, to clean the instrument or touch screen; use just enough moisture to dampen the cloth or swab.

Use a gentle amount of force when cleaning the touch screen.

CAUTION. Do not get moisture inside the instrument during exterior cleaning.

Do not wash the front-panel On/Stan dby switch. Cover the switch while washing the instrument.

Do not spray liquids d irectly on the instrument or touch screen.

Do not use abrasive cleaners, or chemical cleaning agents that contain benzene, toluene, xylene, acetone, or similar solvents; they can damage the instrument or touch screen. Do not use commercial glass cleaners to clean the touch screen.

Do not scrub the touch screen with excessive force while cleaning.

NetTek®YBT250 Quick Start User Manual 3

Installation

Connecting the AC Adapter

1. Lift the instrument strap to expose the

power adapter conn ector.

2. Connect the AC power adapter to th e

instrument.

3. Connect the AC adapter to a

properly-grounded AC power source using the provided power cord.

4. Charge the batteries before using the

instrument on battery power for the ﬁrst time. (See page 5, Charging the Batteries.)

4 NetTek®YBT250 Quick Start User Manual

Charging the Batteries

Charge the batteries before using the instrument on battery power for the ﬁrst time. Batteries are partially ch arged and calibrated at the factory. A calibrated battery allows the instrument to more accurately estimate how long the application modules can operate before the instrument automatically powers off. The front-panel BATTERIES charge status indicator turns off when charging is complete.

Approximate charge time

Number of batteries Instrument powered on Instrument powered off

1 8 hours 3 hours

2 16 hours 6 hours

NOTE. These are typical numbers for batteries that are low but not completely discharged. Newer-model instruments can contain

higher-capacity batteries, resulting in increased run time and longe r charge time.

For more information on battery charging, battery calibration, and instrument power management, see the instrument Online help: Start > Help > Tektronix Basics > Power Management.

Installation

NetTek

YBT250 Quick Start User Manual 5

Installation

Powering On and Off the Instrument, and Functional Veriﬁcation

1. Tap th e On/Standby button to power on

the instrument.

The instrument WindowsCE Status bar shows the Battery icon when the instrument is operating on battery power and the External Power Connected icon when the instrument is operating with an external adapter.

To power off the instrument, tap the On/Standby button again.

For information on the instrument on/standby power modes, see the Online help: Start > Help > Tektronix Basics >

Shutting Down the Instrument.

2. For functional veriﬁcation, watch the

screen. Verify that the instrument does not display any power-on diagnostic error messages.

6 NetTek®YBT250 Quick Start User Manual

Touch Screen Concepts

The instrument user interface is based on touch-screen technology. Instead of using physical button and knob controls to select functions, set values, and take measurements, you tap (touch) virtual controls on the instrument screen. Virtual controls behave the same way as physical controls.

The following are touch screen terms used in this manual:

Term Description Equivalent mouse operation

Stylus

Tap

Drag Press gently o n the screen with the stylus, drag the stylus to a

The physical object you use to touch the screen. A stylus is either your ﬁnger or an appropriate plastic-tipped stylus. Do not use any metal-tipped objects or pens for a stylus, as they can damage the touch screen.

Touch the scree n brieﬂy with the stylus. Selects the item on the screen.

new position, and then raise the stylus from the scree n. Moves an item or selects an area.

Installation

The mouse pointer.

The left mouse button.

Drag (hold down the left mouse button, move the mouse, and then release the button).

NetTek®YBT250 Quick Start User Manual 7

Installation

Calibrate the Touch Screen

Before using the instrument for the ﬁrst time, calibrate the touch screen display to respond correctly to your ta ps.

1. Tap Start > Settings > Control Panel to

open the Control Panel screen.

2. Double-tap the Stylus icon on the Control

Panel screen.

3. In the Double-Tap tab, double-tap the

checkerboard grid at a comfortable spee d with your stylus or ﬁnger to set the tap rate.

4. Double-tap the test icon to verify your

settings.

8 NetTek®YBT250 Quick Start User Manual

5. Tap the Calibration tab and read the

instructions.

6. Tap the Recalibrate button to open the

Cursor Position target screen.

7. Follow the target screen instructions.

When the position target disappears, touch anywhere on the screen to return to the Calibration tab.

8. Tap OK to save calibration settings.

Installation

NetTek®YBT250 Quick Start User Manual 9

Installation

Starting the YBT250 Application

Use either of the following methods to start the application:

Double-tap the YBT250 icon on the

instrument screen

Select Start > Programs > NetTek >

YBT250

The instrument opens the YBT250 application. The Microsoft WindowsCE taskbar displays a button for each running application. To bring the application to the front of the screen, tap the YBT250 button in the taskbar.

10 NetTek®YBT250 Quick Start User Manual

Setting Display Colors

You can change the color scheme used in the instrument display. The color schemes optimize the display colors for use in different environments (outdoors or indoors) and for better printing quality on black and white (monochrome) printers.

1. Select Tools > Options.

2. Tap th e Preferences tab.

3. Tap t he Color Scheme list ﬁeld and select

a display color scheme.

4. Tap OK.

5. Select File > Exit to close the application.

6. Restart the application to enable the

changed color scheme.

Installation

NetTek®YBT250 Quick Start User Manual 11

Installation

Enabling Signal Standards

Before you begin using the instrument, you must enable (select) the signal standards that you want to measure. You can only take measurements on enabled standards.

1. Select Tools > Options.

2. Tap t h e Signal Standards tab.

3. Tap the name of the standard in the Signal Standards supported list that you want

to enable. Drag the stylus to select two or more contiguous standards.

12 NetTek®YBT250 Quick Start User Manual

4. Tap t he Add >> button to add the selected

standard(s) to the Signal Standards

selected list.

5. Tap OK. The enabled standards are now

selectable from the main window Signal Standards drop-down list.

NOTE. Limiting the number of enabled standards to just those that you regularly test makes it easier and faster to select a

standard from the Signal Standard drop-down list.

Installation

NetTek®YBT250 Quick Start User Manual 13

Installation

14 NetTek®YBT250 Quick Start User Manual

Getting Acquainted with Your Instrument

Instrument Elements

1. NetTek Y400 Analyzer Platform.

2. Battery compartment.

3. NetTek YBT250 Application Module.

4. Input/Output ports. (See page 17,

Input/Output Connectors (NetTek Y400 Platform).)

5. PCMCIA card ports.

6. Power and Status panel. (See page 16,

Power On/Stan dby and Status Panel.)

7. External adapter power connector. (See

page 4, Connecting the AC Adapt er.)

8. Touch screen.

GettingAcquaintedwithYourInstrument

NetTek®YBT250 Quick Start User Manual 15

Getting Acquainted with Your Instrument

Power On/Standby and Status Panel

1. Power On/Standby button. Push to

power on or off the instrument. For more information, access the online help:

Start > Help > Tektronix Basics > Shutting Down the Instrument.

2. Reset button. Performs a hardware reset;

all programs and data loaded into volatile memory are erased. Generally only used to recover from a system lock-up. Use a thin p robe to push the reset button.

3. Power/Display status. Green indicates that the instrument is powered on. Amber indicates that the instrument is powered o n but the display is turned off (to conserve power).

4. Battery status. Green indicates that the instrument is connected to an external power source and is charging installed batteries. Red indicates a low battery. No color indicates that the batte ries are charged.

16 NetTek®YBT250 Quick Start User Manual

Input/Output Connectors (NetTek Y400 Platform)

1. Microphone input

2. Headphone jack

3. Ethernet conn ector (RJ-45)

4. Serial RS-232 connector

5. PS/2 keybo ard connector

6. USB Host connector

7. USB Slave connector

See the Y400 NetTek Analyzer Setup Reference document (Tektronix part number 071-1430-XX) for more information on the NetTek Y400 Analyzer Platform.

GettingAcquaintedwithYourInstrument

NetTek

YBT250 Quick Start User Manual 17

Getting Acquainted with Your Instrument

NetTek YBT250 Module Signal Connectors

1. Timing Input. Co nnects to an external

timing reference signal, such as a BTS Even Second Clock signal, or the timing signal from a Tektronix YBGPS1 GPS Timing Reference.

2. Frequency Reference Inpu t. Use an external frequency reference signal to improve measurement accuracy.

3. RF Input. The RF Input connects the RF input signal source or measurement antenna to the instrument.

Microsoft WindowsCE Elements

The Microsoft WindowsCE user interface is similar to other Microsoft Windows operating systems. You use standard Microsoft Windows operations to start (run) applications, select and move objects, and open folders or ﬁles. For more Microsoft WindowsCE information, access the online help: Start > Help > WindowsCE Basics.

The S tatus area, located at the bottom right of the screen, contains icons that display important information about the instrument power status. For an explanation of all status area icons, access the online help: Start > Help > WindowsCE Basics > Understanding Taskbar Icons.

18 NetTek

YBT250 Quick Start User Manual

The User Interface

1. Command bar. (See page 20, The

Command Bar.)

2. Tuning controls. (See page 21, The

Tuning Controls.)

3. Measurement results. Shows the

waveform displays and measurement results. The appearance of this area changes depending on the selected measurement mode and measurement type.

4. External signal status buttons.(See

page 22, Th e External Signal Status Buttons.)

5. Measurement mode bu ttons.(See

page 23, The Measurement Mode Buttons.)

6. Parameter entry controls. (See page 24,

The Parameter Entry Controls.)

GettingAcquaintedwithYourInstrument

NetTek®YBT250 Quick Start User Manual 19

Getting Acquainted with Your Instrument

The Command Bar

Contains the applica tion menus, as well as buttons for saving measurement results, opening the application setup dialog box, and running/pausing the application.

Element Description

Menus. S ee the Online help topic Menus for information about the menu functions.

Save Results button. Saves the current measurement acquisition to a ﬁle. See the Online help topic The Save & Export Tab for how to set ﬁle save parameters.

Edit button. Opens the Setup dialog box that contains instrument settings tabs. See the Online help topic Setup Tabs for information on the setup dialog tabs.

Open button. Shows the Open dialog box that lists saved instrument setup ﬁles to load and conﬁgure instrum ent settings. See the Online help topic The Setup Menu Tab for directions on how to switch the button between the Edit and Open modes.

Run/Pause button. Runs or Pauses the current measurement acquisition.

Help button. Opens the online help. Online help is context-sensitive and normally displays a help topic related to the current measurement mode or screen. If the current screen is not context-sensitive, the instrument opens the Online help at the main help menu. Use the index, or do a word search, to locate speciﬁc information.

20 NetTek®YBT250 Quick Start User Manual

The Tuning Controls

Selects the signal standard, signal direction (uplink or downlink), measurement channel, and measurement frequency.

Element Description

GettingAcquaintedwithYourInstrument

The Signal Standard drop-down list displays the enabled signal standards from which you select a standard to measure. (Se e page 12, Enabling Signal Standards.)

The Downlink and Uplink buttons change the Freq (MHz) setting to the forward link (downlink) or reverse link (uplink) frequency of the cu rrent signal standard and channel. For W-CDMA signals, the se buttons set th e corresponding forward or reverse channel number.

The C hannel button sets the channel number. The ﬁeld next to the button shows the current channel number. Tapping the button opens the numeric keypad, with which you enter a channel number.

The current signal standard deﬁnes the available channel numbers. Setting the channel number se ts the instrument measurement frequency to the appropriate value for the selected signal standard and up or downlink mode setting.

The Freq (MHz) button sets the Measu remen t Frequency. The ﬁeld next to the button shows the frequency. Tapping the button opens the numeric keypad, with which you enter a frequency value.

NetTek®YBT250 Quick Start User Manual 21

Getting Acquainted with Your Instrument

The External Signal Status Buttons

Indicates status and sets GPS, measurement reference frequency source, and input signal attenuation or ampliﬁcation values.

Element Description

The GPS sta tus button indicates the GPS signal lock status of an attached GPS r eceiver. The color indicates the GPS receiver signal lock status. Tap this button to open the GPS setup tab. See the Online topic The GPS Tab for more information.

The Measurement Reference Frequency status button indicates the measurement frequency reference source. Tap this button to open the Inputs tab. Use this button if you connect an extern al measurement reference frequency source to the instrument.

The ava ilable measurement reference frequency sources are the internal instrument frequency reference (F INT), an external reference (F E XT), or a GPS-derived timing reference from the Tektronix YBGPS1 GPS Timing Reference (F GPS). See the Online topic The Inputs Tab for more information.

The RF Input Signal Gain/Loss status button shows the external attenuator or ampliﬁer status. Tap this button to open the Inputs tab where you can set the input signal ampliﬁcation or attenuation values. Use this button if you connect an attenuator or ampliﬁer to the input signal. See the Online topic The Inputs Tab for more information.

22 NetTek®YBT250 Quick Start User Manual

The Measurement Mode Buttons

The Measurement Mo de buttons select the type of measurement or operation to perform.

Element Description

Select th e Signal Measurements button to take signal measurements including RF power, signal quality, occupied bandwidth, carrier frequency, power vs. time, and others.

Select the Spectrum Measurements button to take spectrum and spectrogram measurements.

Select t he Interference Measurements button to take signal strength, audio demodulation, noise ﬂoor, EMF, and signal scanner measurements.

Select the Measurement Sequencer button to display multiple measurements.

GettingAcquaintedwithYourInstrument

NetTek®YBT250 Quick Start User Manual 23

Getting Acquainted with Your Instrument

The Parameter Entry Controls

The Parameter Entry controls (keypad and knob) let you en ter or change numeric values in selected ﬁelds. You can use either tool to enter or change a value.

Element Description

The input control ﬁeld shows the label for the ﬁeld and the curren t value of the selected ﬁeld or object.

Tapthekeypadbuttontodisplayakeypadinwhichtoenteravalueintheselectedﬁeld. The keypad conten t changes to show the available entry functions for the selected item.

The knob control lets you scroll through and select from all available values.

1. Drag the knob circle left or right to quickly scroll through all available values and select a value.

2. Tap the arrows on the top half of the knob icon to step the value in large increments. The

increment value depends on the value type (channel or frequency).

3. Tap th e arrows on the bottom half of the knob icon to step the value in single unit increments.

24 NetTek®YBT250 Quick Start User Manual

Getting Help

The ap plication includes a comprehe nsive Online help system. You access Online help using the following methods:

Online help element Description

Contents Index Online h elp Content and Index links. Every Online help topic includes a Contents and Index link.

GettingAcquaintedwithYourInstrument

Help button. Located at the top right of the screen, this button is available all the time. Tap this button to display a help topic that is relevant to the c urrent measure m ent screen.

If the current screen is not context-sensitive, the application opens the Online help at the main help menu. Use the index link, or do a word search, to locate speciﬁc information.

Help link text. On measurement screens, u nderlined blue text is help link text. Bold help link text at the top of a measurement screen opens a topic describing how to take that measurement. Help link text that is located next to a measurement or setting opens a topic relevan t to that particular measurement or setting.

If the topic does not contain the information you were seeking , use these links to locate speciﬁc information.

Tab or dialog box help button. This button is displayed at the bottom of ma ny setup tabs or dialog boxes, and opens an Online help topic relevant to that tab or dialog b ox.

NetTek®YBT250 Quick Start User Manual 25

Getting Acquainted with Your Instrument

26 NetTek®YBT250 Quick Start User Manual

Operating Basics

Setting Up to Take a Measurement

Perform the following steps to set up the instrument to take a measurement. These steps apply for most types of measurements.

1. Connect a signal to the instrument.

2. Tap t h e Signal Standard List arrow button

to open the signal standard list.

3. Tap a signal standard to select it. This

signal standard is used for measurements until you change to a different signal standard. (See page 12, Enabling Signal Standards.)

4. Tap the appropriate signal Uplink or

Downlink butto n for the measurement that

you are taking.

Operating Basics

NetTek®YBT250 Quick Start User Manual 27

Operating Basics

Entering a Channel:

NOTE. You only need to enter a channel or a frequency; you do not need to enter both values.

5. Tap the Channel button to open the keypad.

6. Enter a channel number.

7. You can also tap the List button to display

a list of available channels from which to select a value. Channel numbers are deﬁned by the current signal standard.

If there is a corresponding frequency for the entered channel number, the instrument displays that frequency in the Freq (MHz) ﬁeld.

If you enter a channel number outside the valid range, the instrument sets the channel number to the closest valid number.

8. Tap OK to close the keypad or channel list and set the channel value.

28 NetTek®YBT250 Quick Start User Manual

Entering a Frequency:

NOTE. You only need to enter a chan nel or a frequency; you do not need to enter both values.

9. Tap the Freq (MHz) button to open the

keypad.

10. Use the keypad to enter a frequency v alue .

This sets the cente r frequency of the measurement.

If there is a corresponding channel number for the entered frequency, the instrument displays that channel number in the Channel ﬁeld.

11. Tap a frequency unit button (such as GHz

or MHz) to close the keypad and set the frequency value.

Operating Basics

NetTek®YBT250 Quick Start User Manual 29

Operating Basics

Selecting a Measurement Mode:

12. Tap a measurement mode button. (See

page 23, The Measurement Mode Buttons.)

13. For Spectrum and Interference measurements, select the tab of the measurement that you want to take.

14. For Signal measurements, tap the Select Measurement button, then tap the

measurement that you want to take.

30 NetTek®YBT250 Quick Start User Manual

Setting Additional Measurement Parameters:

15. Tap the Edit button to open the Setup

dialog box.

16. Tap the tab of the measurement parameters

that you want to set.

17. Select or enter the m easurement parameter

values.

18. Tap OK to close the Setup dialog box

and enable the measure ment parameter settings.

Operating Basics

NetTek®YBT250 Quick Start User Manual 31

Operating Basics

Signal Measurements

Taking a Signal Measurement

Signal measuremen ts include RF channel power, peak/average, carrier frequency, occupied bandwidth, signal quality, code power, codograms, and pilot power. Available measurements depend on the current signal standard.

1. Set the instrument to measure a signal of interest. (See page 27, Setting Up to Take a Measurement.)

2. Tap t h e Signal Measurement button.

3. Tap th e Select Measurement button to open the Select Signal Standard and Measurement dialog box.

4. Tap the measurement button for which

you want to take measurements. The instrument opens the s elected measurement screen.

32 NetTek®YBT250 Quick Start User Manual

5. Make any nece ssary setting changes on

the m easurement screen (if available). For example, the cdma2000 Signal Quality measurement lets you select the signal type to use for measuring Signal Quality (Pilot only or Auto detect active codes).

6. Tap the Edit button to open the Setup

dialog box and set additional measuremen t parameters in the dialog box tabs. Available parameters depend on the current signa l standard and measurement type. Not all measurements have setup parameters.

Operating Basics

NetTek®YBT250 Quick Start User Manual 33

Operating Basics

Spectrum Measurements

Displaying a Spectrum Waveform

1. Set the instrument to measure a signal of

interest. (See page 27, Setting Up to Take a Measurement.)

2. Tap t he Spectrum button.

3. Tap th e Spectrum tab.

4. Tap t he AutoLevel button.

5. Tap the Span controls to change the

displayed frequency span to show the waveform area of interest.

34 NetTek®YBT250 Quick Start User Manual

Operating Basics

6. Tap t he Ref Lvl ﬁeld or the Vertical Scale

ﬁeld to select it.

7. Use the Parameter Entry controls to enter

or change the scale setting.

8. Use markers to take measurements

between different parts of the waveform. (See page 3 6, Spectrum Waveform Markers.)

NOTE. Ta p t h e Edit buttontoopentheSetup dialog box and set additional measurement parameters. Available parameters

depend on the current signal standard and measurement type. Not all measurements have setup parameters.

NetTek®YBT250 Quick Start User Manual 35

Operating Basics

Spectrum Waveform Markers

Markers are visual icons that you position on a spectrum waveform to measure signal frequency and level values. You use the markers to measure the value at a particular point on a waveform or to measure the difference between two markers (Marker 1 minus Marker 2). The markers follow the waveform level changes.

Each marker icon has an associated marker readout, displayed at the bottom of the Spectrum display. The marker readout shows the marker icon symbol, the marker name, and the frequency and level values for the marker.

There are three markers available: the Trace marker (Trace), M1, and M2. The Trace m arke r changes the measurement frequency to the location you select on the waveform. The M1 and M2 markers read the waveform frequency and level at the location they are placed.

TurningMarkersOnandOff.

1. Tap View.

2. Tap Markers to turn marker display on or

off.

3. Markers consist of a marker icon that is placed on a waveform, and a marker readout that shows the signal frequency and level at the marker icon position.

36 NetTek®YBT250 Quick Start User Manual

Adding or Moving a Marker on a Waveform.

1. Tap the marker readout of the marker that

you want to add or move on the spectrum waveform. The marker read out border darkens to indicate that it is selected.

2. Tap the waveform where you want to add or

move the marker. The marker is positioned on the waveform and the readou t shows the signal values at the new location.

3. If necessary, use the Parameter Entry

controls to position the marker on the waveform by changing the marker frequency.

Operating Basics

NetTek®YBT250 Quick Start User Manual 37

Operating Basics

Comparing Spectrum Waveform Traces

You can compare two live waveforms (derived from the single RF input signal), a live signal and a saved waveform, or two saved waveforms.

Selecting a Waveform Trace.

1. Tap t he Traces button to toggle between Trace 1 and Trace 2.

Comparing Live Waveform Traces.

1. Set the instrument to display the spectrum

waveform of interest. (See page 34, Displaying a Spectrum Waveform.)

2. Tap t h e Traces button to select Trace 1.

38 NetTek®YBT250 Quick Start User Manual

3. Tap the Trace 1 list button and then tap

a trace type to select it. The instrument applies the selected operation to the RF input signal and displays the results as the trace 1 waveform.

4. Tap the Traces button again to select

Trace 2.

5. Tap th e Trace 2 list button and then tap a

trace type to select it.

The instrument applies the selected operation to the input signal and displays the result as the trace 2 wavefo rm, along with the trace 1 waveform. The ﬁgure shows Trace 1 as a Normal waveform and Trace2asaMin Hold waveform.

Operating Basics

NetTek®YBT250 Quick Start User Manual 39

Operating Basics

6. To make measurements between the waveforms, use the View menu to set which markers are on which trace.

40 NetTek®YBT250 Quick Start User Manual

Operating Basics

Comparing a Live Waveform to a Saved Waveform.

NOTE. The current instrument measurement settings must match the instrument settings used to capture the saved waveform.

1. Set the instrument to display a spectrum

waveform of interest. (See page 34, Displaying a Spectrum Waveform.)

2. Tap t he Traces button to select Trace 1.

3. Tap th e Trace 1 list button and then tap a

trace type to select it.

4. Tap t he Traces button to select Trace 2.

NetTek®YBT250 Quick Start User Manual 41

Operating Basics

5. Tap t h e Trace 2 list button and tap Saved to open the Trace 2 & Mask setup tab.

6. Tap Saved Trace.

7. Enter a ﬁle path and name of a saved

waveform ﬁle, or tap the Browse button to navigate to and select the saved waveform to open.

8. Tap OK. The instrument displays the saved waveform as th e Trace 2 waveform. You can use markers to make measurements between the waveforms.

42 NetTek®YBT250 Quick Start User Manual

Operating Basics

Comparing Two Saved Waveform Traces.

NOTE. Waveform traces are saved with the s etting s in effect at the time the trace is saved. When a saved trace is displayed, the

stored se ttings values are shown for reference, though no actual instrument settings ch ange. As soon as you tap the Run button to return to making new acquisitions, the display settin gs are restored to what they were before the saved trace was opened.

1. Select File > Compare Saved.

2. Navigate to and select the ﬁrst wave form

ﬁle to load.

3. Tap OK to open the Select second result

ﬁle to compare dialog box (it looks exactly thesameastheﬁrst dialog box).

4. Navigate to and select the second

waveform ﬁle to load.

5. Tap OK to select the second ﬁle and close

the dialog box. The instrument displays both waveforms.

6. After viewing the waveforms, tap the Run

button to return the instrument to taking measurements.

NetTek®YBT250 Quick Start User Manual 43

Operating Basics

Displaying a Spectrogram

A spectrogram shows how the signal level changes over time. It can be very useful in ﬁnding intermittent signal level variations.

1. Set the instrument to display the spectrum waveform of interest. (See page 34, Displaying a Spectrum Waveform.)

2. Tap t h e Spectrogram tab. The Spectrogram display updates from the bottom to the top of the display.

3. Tap the Updates button to display a dialog box where you can change the spectrogram measurement update rate and enable automatic saving of data when a screen is full (80 data record acquisitions).

4. The Data Record readout shows the time and date sta mp of the spectrogram record located at the record cursor (white horizontal line). To change the record cursor position, tap the Data Record ﬁeld and use the keypad or knob to move the record cursor.

44 NetTek®YBT250 Quick Start User Manual

Interference Measurements

The Interference measurement capabilities provide functions to help identify interference signals, demodulate AM or F M audio signals, assess the strength of an interfering signal, measure the noise ﬂoor on receive channels, and display PN offset or scrambling code data for spe ciﬁed chan nels.

Tab Description

Identify Display information on the likely modulation type of a selected signal. Identify can differentiate

between CDMA, W-CDMA, GSM, IS-136, and analog signal modu lation types. (See page 46, Identifying a Signal.)

Strength Locate an interfering signal by using a directional antenna and listening to an audio tone that

corresponds to the signal level. (See page 48, Locating the Direction o f a Signal.)

Audio

Noise

EMF

Scan Display PN offset or scrambling code data for speciﬁed channels. (See page 53, Channel

Demodulate an AM or FM signal to help identify trafﬁc type. (See page 49, Listening to the Audio Content of a Signal.)

Measure the noise ﬂoor on receive channels. (See page 51, Taking a Noise Floor Measurement.)

Measure RF ﬁeld strength, such as when assessing the strength of an interfering signal. (See page 52, Measuring EMF.)

Scanners.)

Operating Basics

NetTek®YBT250 Quick Start User Manual 45

Operating Basics

Identifying a Signal

1. Set the instrument to display the spectrum

waveform of interest. (See page 34, Displaying a Spectrum Waveform.)

2. Tap t h e Interference button, and then tap the Identify tab.

46 NetTek®YBT250 Quick Start User Manual

3. Tap the trace of the interfering signal to

set the measurement frequency. Try to set the measurement frequency to the center of the signal. You can also enter the frequency value.

4. The Speciﬁed Channels list displays

any signal standards that have channels deﬁned at the measurement frequency.

5. Tap Measure. The instrument performs a

series of measurements to identify which signal standard the signal’s characteristics most closely match and displays possible matches in the Measurements suggest results box. The signals are sort ed by frequency, with the signal that most closely matches the measurement frequency located at the top of the list. The instrument also lists bandwidth and level information above the Measure button.

Operating Basics

NetTek®YBT250 Quick Start User Manual 47

Operating Basics

Locating the Direction of a Signal

1. Connect a directional antenna to the

instrument.

2. Set the instrument to display the spectrum waveform of interest. (See page 34, Displaying a Spectrum Waveform.)

3. Tap t h e Interference button, and th en tap the Strength tab.

4. Tap the trace of the interfering signal to set the measurement frequency. You can use the keypad or knob to adjust the measurement frequency.

5. Point the directional antenna in different directions. As you change the direction of the antenna, the audible tone and beep (if selected), and th e Strength bar graph change to indicate signal strength. The signal of interest is located in the direction that results in the strongest signal.

6. Tap Fast Update to improve audio tone response, at the expense of a reduced screen update rate.

48 NetTek®YBT250 Quick Start User Manual

Listening to the Audio Content of a Signal

1. Set the instrument to display the spectrum

waveform of interest. (See page 34, Displaying a Spectrum Waveform.)

2. Tap th e Interference button, and then tap

the Audio tab.

Operating Basics

NetTek®YBT250 Quick Start User Manual 49

Operating Basics

3. Tap the trace of the interfering signal to set the measurement frequency. You can use the keypad or knob to adjust the measurement frequency.

4. Tap the different Demodulation types and listen to the resultant audio (if any). A station ID can be particularly helpful when the interfering signal is a radio or broadcast television station. You may also be able to discriminate between possible sources by listening to the characteristic sounds of paging, video, control signals or the harmonics of other common signals.

50 NetTek®YBT250 Quick Start User Manual

Operating Basics

Taking a Noise Floor Meas urement

Noise ﬂ oor measures all the RF Power coming into the receive antenna within the frequency band of the selected channel. The noise ﬂoor is the power integrated across the selected channel. To make an accurate measurement, you must measure the noise ﬂoor on a disabled channel (a channel that is not carrying live trafﬁc).

1. Connect a signal from a BTS receiver test

port to the instrume nt.

2. Set the instrument to display the spectrum

waveform of interest. (See page 34, Displaying a Spectrum Waveform.)

3. Tap th e Reverse (up) link button.

4. Tap th e Interference button, and then tap

the Noise tab.

5. Tap the trace of the interfering signal to

set the measurement frequency. You can use the keypad or knob to adjust the measurement frequency.

NetTek®YBT250 Quick Start User Manual 51

Operating Basics

Measuring EMF

EMF ﬁ eld strength is a measure of the absolute electromagnetic power of a signal at a particular frequency and bandwidth at the antenna, without reference to signal modulation.

1. Connect a hand-held antenna and ﬁlter (if used) to the instrument.

2. Set the instrument to display the spectrum waveform of interest. (See page 34, Displaying a Spectrum Waveform.)

3. Tap t he Downlink button.

4. Tap t h e Interference button, and th en tap

the EMF tab.

52 NetTek®YBT250 Quick Start User Manual

Operating Basics

Channel Scanners

Channel scanner measurements display channel-speciﬁc measurements on GSM, cdma200, 1xEV-DO, and W-CMA standards. Scanner measurements are for off-air reception using an antenna, and measure only downlink signals.

1. Connect a hand-held antenna (and ﬁlter

if used) to the instrument RF INPUT connector.

2. Set the instrument to measure a signal of

interest.(Seepage27,Setting Up to Take a Measurement.)

3. Tap th e Downlink button.

4. Tap th e Interference button, and then tap

the Scan tab.

NetTek®YBT250 Quick Start User Manual 53

Operating Basics

Scanner displays consist of two parts. The upper display is a plot of channel, scrambling code, or PN offset codes and signal strength. The lower display provides more information on individual channels, scrambling code, or PN offsets.

5. Use available controls to set measurement functions.

NOTE. To make accurate measurements, use a receive ante nna with a frequency response and ba ndwidth that is appropriate for

the channel you are measuring. Use a high quality, low-loss Band Pass Filter (BPF) to reject signals outside the signal band. If you take measurements near a high-power transmitter, such as commercial TV or radio, a BPF may be necessary for the scanner to produce usable results.

54 NetTek®YBT250 Quick Start User Manual

Operating Basics

Scanner Tadd/Tdrop Markers. Tadd and Tdrop are horizontal markers that you can set on 1xEV-DO and cdma2000 PN

Scanner measurements to visually indicate add or drop signal power levels. Using these markers lets you quickly identify PN codes that are within deﬁned add or drop ranges. The Tadd/Tdrop horizontal markers are visual aids only, and do not cause the instrument to display warnings when signals are above or below the set levels.

1. Select View > PN Scanner Tadd/Trop

Markers to display the markers on the

scanner measurement graph.

2. Tap the Tadd or Tdrop readout and use

the keypad or knob control to change the marker level value.

NetTek®YBT250 Quick Start User Manual 55

Operating Basics

Custom Scanner Code Labels. The Scanner Code Label Editor lets you add unique labels to the graphs of 1xEV-DO and

cdma2000 PN scanners, and the W-CDMA scrambling code analyzer. Once you have created labels, tapping a bar graph of a PN offset or scrambling code displays the label assigned to that PN offset or scrambling code, directly be low the graph. Using labels lets you quickly iden tify the source of a particular code.

1. Select View > PN Offset Labels or View > Scrambling CodeLabels to enable

viewing scanner labels on the scanner measurement graph.

2. Tap a bar graph plot to display the custom label assigned to that PN offset or scrambling code.

See the Online help topic Scanner Code Labels Overview for information on creating, saving a nd using custom scanner code labels.

56 NetTek

YBT250 Quick Start User Manual

Displaying Multiple Measurements

The Measurement Sequencer mode lets you display one or more signal measurements for a single standard an d channel/frequency. The instrument sequences through each of the selected measurements and displays the results on the Sequencer screen.

1. Set the instrument to measure a signal of

interest.(Seepage27,Setting Up to Take a Measurement.)

2. Tap th e Sequencer button.

3. Tap t he Select Measurements button.

4. Select which measurements to display in

the Sequencer screen, and then click OK. Available measurements depend on the current signal standard.

Operating Basics

NetTek®YBT250 Quick Start User Manual 57

Operating Basics

5. The instrument displays the selected measurements, sequentially updating the measurement values.

6. Out-of-limit me asurements are marked by aredblockwithanupordownarrow.

7. Messages may appear in the measurement name gray bar to indicate measurement errors or conditions.

Saving and Loading Sequencer Measurements and Results

You can save measurement sequences for each standa rd and then recall these sequences later for reu se. To save a measurement sequence, tap Setup > Save, enter a name, and tap OK.

You can use the ﬁle menu to save, export, or print the numeric Sequencer data, including error information and the timestamp (the time of the last individual measurement taken). Note that if yo u export a screen, a picture of only what shows on the screen is exported. If there is a scroll bar visible, then some measurement results are hidden and are not exported. To avoid this proble m , use File > Export Results As, or scroll down and export a second view of the screen.

To load a saved sequence, tap Setup > Open, navigate to and select a saved sequence settings ﬁle, and tap OK.

58 NetTek

YBT250 Quick Start User Manual

Speciﬁcations

This section lists the electrical, environmental, and physical speciﬁcations of the NetTek YBT250. All speciﬁcations are guaranteed unless labeled “typical”. Typical speciﬁcations are provided for your convenience and are not guaranteed.

Table 1: G eneral characteristics

Characteristic Description

RF Input

Input F reque ncy Range 30 MHz – 2500 MHz

Input Impedance

Signal Amplitude for Modulation Measurements

Signal Amplitude for Spectral Display, typical

Input Overload Detect >1 W (+30 dBm) CW or pea k envelope power

Maximum Input Power without Damaging Instrument

Coupling AC for all measurements and spectral display modes

Speciﬁcations

50 ohms (nominal)

–50 dBm to +30 dBm for CW-like or peak envelope power

Measurements may be outside this range but accuracy is not guaranteed

CW or peak envelope power:

–144 dBm to +30 dBm, 200 MHz to 2.0 GHz –142 dBm to +30 dBm, 2.0 GHz to 2.2 GHz –139 dBm to +30 dBm, 2.2 GHz to 2.5 GHz

Levels apply wh en using 100 Hz resolution bandwidth

50 W CW or peak envelop e power

NetTek®YBT250 Quick Start User Manual 59

Speciﬁcations

Table 1: General characteristics (cont.)

Characteristic Description

External Frequency Reference Input

Maximum Working Voltage

Spurious In put Signals To meet modulation measu rement speciﬁcations:

Impedance

Input Connector 50 ohm BNC

Frequency Range

Level Range –15 dBm to +15 dBm

15 V (DC + peak AC)

(Total power of interest - Total power in spurious) > 35 dB

| Center frequency of signal of interest - center frequency of spurious signal | > 1.4 MHz

and

(Total power of interest - Total power in all spurious) ≥ –3 dB

1500 ohms (nominal)

Anymultipleof1MHzupto15MHzinclusive,±1ppm

Any multiple of 1.2288 MHz up to 19.6608 MHz inclusive, ± 1 ppm

2.048 MHz ± 1 ppm

4.8 MHz ± 1 ppm

dBm levels assume 50 oh m source

60 NetTek®YBT250 Quick Start User Manual

Table 1: General characteristics (cont.)

Characteristic Description

Maximum Input Level without Damage

Coupling AC

Working Voltage

Lock Time < 15 seconds

Timing Input

Impedance

Minimum High Threshold 2.0 V

Maximum Low Threshold 0.8 V

Minimum H igh Time 10 ns

Minimum Low Time 10 ns

Maximum Input Level without Damage

Coupling DC

Timing Error ± 10 ppm

± 3 V peak continuous

3 V (DC + peak AC)

10 kΩ

± 5 V peak continuous

Speciﬁcations

NetTek®YBT250 Quick Start User Manual 61

Speciﬁcations

Table 1: General characteristics (cont.)

Characteristic Description

Internal Time Base Characteristics

Signal Path Characteristics

Error

Phase Noise

Noise Figure 1 kHz resolution bandwidth:

Displayed Average Noise Level (DANL), typical

± 0.5 ppm drift from 0 ° C to 50 °C

± 1.0 ppm aging/year

Ten minute warm-up period required to meet accuracy speciﬁcation.

Users can conne ct the External Reference input to a freq uency source and obtain a user correction value. This value will be used to correct time base errors in measurements to the accuracy of the external reference. The internal time base will continue to drift with temperature and age as speciﬁed above.

≤ –75 dBc/Hz @ 20 kHz carrier offset

≤10 dB, 200 MHz to 2000 MHz ≤12 dB typical, 2000 MHz to 2200 MHz ≤15 dB typical, 2200 MHz to 2500 MHz

10 Hz RBW: –152 dBm, 200 MHz to 2000 MHz

100 Hz RBW: –145 dBm, 200 MHz to 2000 MHz

1 kHz RBW: –135 dBm, 200 MHz to 2000 MHz

62 NetTek®YBT250 Quick Start User Manual

Table 2: Measurement characteristics

Measurement Description

External Attenuation

Code Domain Power (cdmaOne, cdma2000, W-CDMA)

Units dB relative to Pilot Power or Total Power

Resolution 0.1 dB

Accuracy

User Selectable ON/OFF

Attenuation=–30dBto+80 dB

Measures the power in each of the Walsh cod es (64 in cdmaOne, 12 8 in cdma2000) used in a CDMA signal.

Measures the power in each of (up to 512) OVSF codes used in a W-CDMA signal.

cdmaOne and cdma2000: ± 1 dB code domain power level > –20 dB relative to total power, using the recommended TIA/EIA-IS-97-D pilot level of –;7.0 dB (20%) relative to total power.

W-CDMA: ± 1 dB Code domain power level > –20 dB relative to total power, using W-CDMA 3GPP Test Model 3.

Reference information: ± 2.5 dB for –27 dB < CDP < –20 dB relative to total power in band classes 0-6 (cdmaOne, cdma2000). ± 2.5 dB for –27 dB < CDP < –20 dB relative to total power (W-CDMA).

Speciﬁcations

NetTek®YBT250 Quick Start User Manual 63

Speciﬁcations

Table 3: Spectral analysis

Characteristic Description

Measurement Frequency

Frequency Span Sets the freque ncy range covered by the spectral display.

Resolution Bandwidth (RBW)

Sets the measurement frequency of the display. The measurement fre quency can be set by either entering a speciﬁ c frequency or by selecting a channel number.

Units

Resolution 1 kHz 1 channel

Range 30 MHz to 2500 MHz

Units

Resolution 1 kHz

Range 10 kHz to 2470 MHz, continuously variable or 1-2-5 steps

Units

Resolution Uses 1-3 steps to cover the range

Range 10Hzto6MHz

MegaHertz (MHz) or Channel Number

kiloHertz (kHz), MegaHertz (MHz)

Width of the resolution bandwidth ﬁlter

Hertz (Hz), kiloHertz (kHz), MegaHertz (MHz)

When in Auto mode, the instrument automatically sets the RBW. The RBW is set a s a combination of 1-3 steps at the 1, 2, 5 span settings, and a linear range between 1, 2, 5 span settings, for a nominal value of approximately span/125.

64 NetTek®YBT250 Quick Start User Manual

Table 3: Spectral analysis (cont.)

Characteristic Description

Reference Level The power level indicated by the top line of the spectral display

Units dBm

Resolution 1 dBm

Range –100 dBm to +30 dBm

Spectral Display Amplitude

Units

Resolution 0.1 dB

Accuracy ± 1.25 dB, –20 dBm to +30 dBm

dB relative to Reference Level

± 2.0 dB, –80 dBm to –20 dBm ± 2.75 dB, –120 dBm to –80 dBm ± 5 dB –134 dBm < Input < –120 dBm, typical

Accuracy speciﬁcations apply only for spans less than 1000 MHz and to CW-like signals.

Speciﬁcations

NetTek®YBT250 Quick Start User Manual 65

Speciﬁcations

Table 3: Spectral analysis (cont.)

Characteristic Description

Vertical Scale Factor

Units 1 dB to 10 dB in 1 dB increments

Display Modes Normal: updates display with each new result

Max Hold: updates displayed point only if new point > old point Min Hold: updates displayed point only if new point < old point Max/Min Hold: displays a bar between Max Hold and Min Hold Average: displays average of N (speciﬁed by user) results

Reference information: Average is calculated as follows: Th e last N values are saved in memory; when a new result is available, the earliest result of the N stored values is discarded, the new average is calculated from the stored values. If the number of results is less than N, then all of the results are averaged together.

Number of Averages

Spurious Free Dynamic Range (external signal related)

1 ≤ N ≤ 99

IM3 better tha n –70 dBc typical, 100 MHz to 2500 MHz

2nd Harmonic better than –60 dBc, typical

66 NetTek®YBT250 Quick Start User Manual

Table 3: Spectral analysis (cont.)

Characteristic Description

Residual Spurious Signals

–125 dBm at BTS Rx frequencies (776–794, 806–849, 872–940, 1453–1465, 1525–1549, 1710–1785, 1840–1910,1920–1980) MHz and GPS frequencies (L1 1570.3–1580.5, L2

1222.5–1232.8, L5 1171.4–1181.6) MHz

–115 dBm at BTS Tx frequencies (746–764, 832–834, 840–960, 1477–1513, 1805–1880, 1930–1990, 2110–2170) MHz

–95 dBm at frequencies not listed above, except from 1155–1168 MHz: -20 dBm in spans above 10 MHz, 1155 MHz–1175 MHz

Table 4: Interference analysis characteristics

Characteristic Description

Noise Floor Measurement

Units dBm

Resolution 0.1 dB

Accuracy ± 3 dB typical

AM Demodulation

Measurement Frequency

Measures the interference power that is coming into the receiver antenna for any standard. Measurement defaults to uplink channel when speciﬁed by channel number.

Provides an audio output signal after AM demodulation of the user-selected signal to use for identifying a signal.

30 MHz to 2500 MHz with 1 kHz resolution

Speciﬁcations

NetTek®YBT250 Quick Start User Manual 67

Speciﬁcations

Table 4: Interference analysis characteristics (cont.)

Characteristic Descrip tion

FM Demodulation

Input Signal Level

Measurement Bandwidth

Audio Output Bandwidth

Run Time 4 seconds per activation

Measurement Frequency

Input Signal Level

Maximum Signal Deviation

Measurement Bandwidth

Audio Output Bandwidth

Run Time 4 seconds per activation

–100 dBm minimum

8kHz

4kHz

Provides an audio output signal after FM demodulation of the user-selected signal to use for identifying a signal.

30 MHz to 2500 MHz with 1 kHz resolution

-100 dBm minimum

Up to 100 kHz

8 kHz, 15 kHz, 75 kHz, 200 kHz; selected by user

4 kHz for Measurement BW = 8 kHz, 15 kHz

15 kHz for Measurement BW = 75 kHz, 200 kHz

68 NetTek®YBT250 Quick Start User Manual

Table 4: Interference analysis characteristics (cont.)

Characteristic Description

Signal Strength Indicator Provides an audio tone and a visual display that vary with the strength of the selected signal.

Measurement Frequency

Input Signal Level

Measurement Bandwidth

Tone Type Variable beep rate, based on signal strength

30 MHz to 2500 MHz with 1 kHz resolution

–110 dBm minimum

Up to 10 MHz, dependent on span setting

Variable frequency tone, based on signal strength

Table 5: Scanner characteristics

Characteristic Description

W-CDMA Scrambling Code Analyzer

Input Signal Range

Units and Resolution Io , Ec: dBm

Detects scrambling codes and pilot channel power levels of received co-channel W-CDMA downlink signals.

–117 to +30 dBm, typical

Ec/Io: dB

0.1 dB

Speciﬁcations

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Speciﬁcations

Table 5: Scanner characteristics (cont.)

Characteristic Descrip tion

cdma2000 PN Scanner Detects PN Offset, Tau (Timing Error) and Pilot Channel power levels of multiple co-channel

Accuracy Ec:

±2 dB for Ec ≥ –102 dBm and Ec/Io ≥ –12 dB, typical ±3 dB for Ec ≥ –112 dBm and Ec/Io ≥ –14 dB, typical

Display C ont rols Sort by Power (descending Ec value)

Sort by Scrambling Code (ascending SC index)

Lock (set) current Scrambling Code set

cdmaOne and/or cdma2000 forward link signals.

Input Signal Range

Units Io, Ec: dBm

Resolution

–120 to +30 dBm, typical

Ec/Io: dB

PN Offset: PN index (0 to 511)

Tau: chips

Ec, Io, Ec/Io: 0.1 dB

PN Offset: 1 PN

Tau: 0.1 chip

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Speciﬁcations

Table 5: Scanner characteristics (cont.)

Characteristic Description

Accuracy Ec:

±2 dB for Ec ≥ –95 dBm and Ec/Io ≥ –8 dB, typical ±3 dB for Ec ≥ –110 dBm and Ec/Io ≥ –12 dB, typical

Tau:

0.5 chip, of highest power multipath component of each detected PNOS, relative to input timing reference (ESC or YBGPS1), typical.

Display C ontrols Sort by Power (descending Ec value)

Sort by PN offset (ascending offset values)

Lock (set) current PN Offset values

1xEV-DO PN Scanner Detects PN Offset, Tau (Timing Error) and Pilot Channel power levels o f multiple co-channel

1xEV-DO f orward link signals. Up to 10 PN offsets are displayed.

Io: The total received power in the pilot intervals of the signal, within the signal bandwidth (1.23 MHz).

Ec: The absolute power level of the detected pilot at the indicated PN Offset, in dBm.

Input Signal Range

Units Io, Ec: dBm

–120 to +30 dBm, typical

Ec/Io: dB

PN Offset: PN index (0 to 511)

Tau: c h i ps

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Speciﬁcations

Table 5: Scanner characteristics (cont.)

Characteristic Descrip tion

GSM Channel Scan ner The GSM channel scanner displays channel powe r and related information on a maximum of 128

Resolution

Accuracy, typical Ec:

Display C ont rols Sort by Power (descending Ec value)

Input Signal Range

Ec, Io, Ec/Io: 0.1 dB

PN Offset: 1 PN

Tau: 0.1 chip

± 2.5 dB for Ec ≥ –95 dBm and Ec/Io ≥ –8 dB ± 3.5 dB for Ec ≥ –110 dBm and Ec/Io ≥ –12 dB

Tau: ±0.5 chip, of highest power multipath component of each detected PNOS, relative to input timing reference (ESC or YBGPS1)

Sort by PN offset (ascending offset values)

Lock (set) current PN Offset values

GSM forward link signals.

Displays Chan nel, Frequency, Peak Power, Trafﬁc Type, C/I, and BSIC

The scann er is intended for off-air reception using an antenna, and measures only forward (down) link signals. This measurement requires that YBT250 option GS1 is installed.

–120 to +30 dBm, typical

72 NetTek®YBT250 Quick Start User Manual

Table 5: Scanner characteristics (cont.)

Characteristic Description

Units Frequency: MHz

Peak Power: dBm

C/I: dB

Resolution Frequency: 0.001 MHz

Peak Power: 0.1 dBm

C/I: 0.1 dB

Accuracy, typical

Display C ontrols AutoLevel (graph)

± 1 dB, –20 dBm to +30 dBm, ± 0.75 dB for identiﬁed GSM channels

The center frequency is derived from the channel number.

C/I is derived from EVM using the following equation:

C/I = –20 * log10(EVM/100)

Sort table by power or frequency

Start and stop channel select

Peak hold

Speciﬁcations

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Speciﬁcations

Table 5: Scanner characteristics (cont.)

Characteristic Descrip tion

TD-SCDMA Scanner Detects Sync code index, and DwPts Channel power levels of multiple co-channel TD-SCDMA

forward link signals. Up to 10 Sync codes are displayed.

Io: The total received power in the DwPts of the signal, within the signal bandwidth (1.6 MHz), in dBm.

Ec: The absolute power level of the detected DwPts a t the indicated Sync Code, in dBm.

Input Signal Range

Units Io, Ec: dBm

Resolution

Accuracy, typical Ec:

Display C ont rols Sort by Power (descending Ec value)

–120 to +30 dBm, typical

Ec/Io: dB

Sync Code: Sync Code index (0 to 31)

Ec, Io, Ec/Io: 0.1 dB

Sync Code index: 1 code index offset

± 2.0 dB for Ec ≥ –85 dBm and Ec/Io ≥ –8 dB ± 3.5 dB for Ec ≥ –105 dBm and Ec/Io ≥ –12 dB

Sort by Sync Code (ascending offset values)

Lock (set) current Sync Code values

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Speciﬁcations

Table 6: Signal measurem ent characteristics

Characteristic Description

RF Channel Power Measures the average RF power in a user-deﬁned channel. The default value of channel bandwidth

is taken from the selected standard. The acceptable values for channel numbers are taken from the selected standard. The user can input the channel center frequency instead of the channel number.

Units and Resolution

Accuracy ± 0.75 dB: –20 dBm to +30 dBm, ± 0.5 dB typical

RF Power (GSM/EDGE) Measures the average RF power of the useful part of a GSM or EDGE burst (GMSK or 8-PSK

Units and Resolution

Accuracy

Watts (W), dBm

3 signiﬁcant digits fo r W; 0.1 dB for dBm units

±1.25dB:–80dBmto–20dBm,±1.0dBtypical

Reference information: Accuracy is guaranteed fo r input signals between –80 and +30 dBm total power (CW or peak envelope). Accuracy speciﬁcat ion is typical down to –120 dBm total power.

modulation), as determined by the location of the burst Training Sequence.

dBm: 0.01 dB for dBm units

For GSM or EDGE (GMSK or 8-PSK modulation) burst signals, the RF power measurement accuracy is:

± 1.0 dB: –20 dBm to +30 dBm, ± 0.75 dB typical

± 1.5 dB: –80 dBm to -20 dBm, ± 1.25 dB typical

Reference information: Burst timing is determined from the location of the burst Training Sequence. If Burst timing cannot be found, the power measurement will be done on an arbitrarily selected segment of the signal equal to the useful part of a slot.

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Speciﬁcations

Table 6: Signal measurement characteristics (cont.)

Characteristic Description

RF P ower (1xEV-DO) Measures the RF power in the Pilot, MAC, and Data intervals of a 1xEV-D0 timeslot.

RF Power (TD-SCDMA) Measures the average RF power on individual timeslots (excluding the guard period) as determined

Units and Resolution

Accuracy For burst signals, the RF power measurement accuracy is:

Units and Resolution

Accuracy For burst signals, the RF power measurement accuracy is:

dBm: 0.01 dB for dBm units

± 1.0 dB: –20 dBm to +30 dBm, ± 0.75 dB typ ica l

± 1.5 dB: –80 dBm to –20 dBm, ± 1.25 dB typical

by the location of the downlink pilot timeslot (DwPTS).

dBm: 0.01 dB for dBm units

± 1.0 dB: –20 dBm to +30 dBm, ± 0.75 dB typ ica l

± 1.5 dB: –80 dBm to –20 dBm, ± 1.25 dB typical

Reference information: Burst timing is determined from the power envelope proﬁle of the DwPTS. If the DwPTS cannot be found, an error message is displayed.

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Table 6: Signal measurement characteristics (cont.)

Characteristic Description

RF Channel Carrier Frequency

Units and Resolution

Accuracy

Accuracy using YBGPS1 GPS Timing Reference

Measures the frequency of the carrier in the user selected channel. The user can enter a channel number or frequency.

MegaHertz (MHz): 1 Hz

± (10 Hz + Time Base Error), 99% conﬁdence interval

W-CDMA: ± (12 Hz + Time Base Error), 99% conﬁdence interval

Note: The carrier frequency mus t be within 10 kHz of the expected value, except: W-CDMA, 1xEV-DO, and GSM/EDGE: within 5 kHz IS-136: within 1.5 kHz

W-CDMA3GPPTestModel4

± (10 Hz + 0.015 ppm), typical

Note: The carrier frequency mus t be within 10 kHz of the expected value, except: W-CDMA, 1xEV-DO, and GSM/EDGE: within 5 kHz IS-136: within 1.5 kHz

The GPS antenna and the instrument antenna should be stationary for speciﬁed accuracy. Doppler shift of BST frequency is ± 0.09 p pm when the instrument antenna is moving at 60 mph (100 km /hr).

Speciﬁcations

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Speciﬁcations

Table 6: Signal measurement characteristics (cont.)

Characteristic Description

FM Deviation

PN Offset Measures the PN Offset of the cdmaOne or cdma2000-1x signal. The user can select the CDMA

Pilot Time Alignment Error (Tau)

Measures the maximum one-side frequency deviation of the analog FM cellular carrier selected by the user after demodulation. The user can enter a channel number or frequency.

Units and Resolution

Accuracy

Units and Resolution PN Index: 1 PN Index, where each PN Index is 64 chips

Accuracy

Units and Resolution

Accuracy ± 250 ns typical

kiloHertz (kHz): 0.1 kHz

± 10% for 2 kHz ≤ Deviation ≤ 10 kHz

Maximum measurable deviation is 15 kHz peak.

Maximum modulation frequency is 3 kHz.

signal of interest by a channel number or frequency.

Displayed PN Index must match the PN Offset of the CDMA signal.

Measures the time offset between the PN sequence of the input signal and the External Even Second Clock (on Timing Input connector).

Microsecond (μs), Chips: 0.1 μs (1 chip)

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Table 6: Signal measurement characteristics (cont.)

Characteristic Description

Waveform Quality (Rho, ρ)

Units and Resolution None: 0.0001

Accuracy ± 0.005, 0.9 ≤ρ≤1.0; Usable range 0.5 ≤ρ≤1.0

Waveform Quality (Rho Pilot, Rho MAC, Rho Data) (1xEV-DO)

Units and Resolution None: 0.0001

Measures the waveform quality as deﬁned by IS-97-D using a pilot-only CDMA (or cdma2000-1x) signal.

Degradation due to adjacent channel CDMA carriers (having equivalent power): add ±0.015.

Reference information: The Rho me asureme nt is only spe ciﬁed for a pilot-only CDMA signal. The accuracy speciﬁcation given here applies only to measurements made on a pilot-only CDMA signal, with the instrument set to use the pilot-only method. For measurements on signals that are not pilot-only, see the Estimated Waveform Quality measurement.

Rho (ρ) for 1xEV-DO signals provides an indication of the signal to distortion ratio for the transmitted signal. This quality measure is an indication of how similar the transmitted signal is to a perfect signal. Rho can vary between 0.0 and 1.0, where 1.0 represents a perfect signal.

Rho Pilot is only computed on chips in the Pilot intervals. Pilot Rho is measured on the pilot interval of 20 half slots.

Rho MAC is only computed on chips in the MAC interval. Rho MAC is measured on the MAC interval of 20 half slots.

RhoDataisonlycomputedonchipsintheDatainterval. RhoDataismeasuredontheDatainterval of 20 half slots.

Speciﬁcations

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Speciﬁcations

Table 6: Signal measurement characteristics (cont.)

Characteristic Description

Estimated Waveform Quality

Error Vector Magnitude (EVM) (cdmaOne and cdma2000)

Accuracy ± 0.005, 0.9 ≤ρ≤1.0; Usable range 0.5 ≤ρ≤1.0

Degradation due to adjacent channel CDMA carriers (ha ving equivalent power): add ±0.015.

Measures waveform quality as deﬁned by IS-97-D using any CDMA signal.

Units and Resolution None: 0.0001

Accuracy

Units and Resolution

Accuracy

±0.01forrho≥ 0.9, typical

Reference information: The Rho measurement as given in IS-97-D is only speciﬁed for a pilot-only CDMA signal. This measurement makes an estimate of the Rho value on any CDMA signal.

The no rmalized RMS of all of the vectors that extend from the intended constellation points to the actual symbol points in a record of symbols.

Percent: 0.01%

±1%; EVM ≤ 31%

Degradation due to adjacent channel CDMA carriers (having equivalent power): add 10%

Residual error: 5% < 1000 MHz; 7% < 2000 MHz

Reference inf ormation: These measurements are accurate for both pilot-only and in-service CDMA signals.

80 NetTek®YBT250 Quick Start User Manual

Table 6: Signal measurement characteristics (cont.)

Characteristic Description

ErrorVectorMagnitude (EVM) (W-CDMA)

Units and Resolution

Accuracy (W-CDMA composite)

(W-CDMA EVM16QAM)

Synchronization Channel Power (W-CDMA)

Units and Resolution dBm, W: 0.1 dBm

Carrier Feed through Measures the offset of the constellation from zero power.

Units and Resolution

The normalized RMS of all of the vectors that extend from the intended constellation points to the actual symbol points in a record of symbols.

Percent: 0.01%

±2.5%; 12.5% ≤ EVM ≤ 22.5%

Residual error: 6% < 1000 MHz; 8% < 2500 MHz

Reference information: The W-CDMA composite refers to a signal with one or mo re channels using QPSK modulation, or a combination of QPSK and 16QAM modulation. The EVM measurement readout d isplays the EVM for the composite signal. W-CDMA 3GPP Test Model 4.

±1.5%; 6.5% ≤ EVM16QAM ≤ 22.5%, typical

Residual error: 4%

Reference information: The EVM16QAM measurement read out displays the symbol EVM for the code channels using 16QAM modulation.

Measures the Primary Synchronization Channel (P-SCH) and Secondary Synchronization Channel (S-SCH) power.

dB relative to full carrier power: 0.1 dB

Speciﬁcations

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Speciﬁcations

Table 6: Signal measurement characteristics (cont.)

Characteristic Description

Pilot Power

Sync Power Measures the absolute power of the W-CDMA sync channel (SCH), without regard to whether

Occupied Bandwidth The Occu pied Bandwidth measurement displays the frequency bandwidth within which 99% of the

Accuracy

Units and Resolution

Accuracy ± 1 dB, –20 dBm to +30 dBm

Units and Resolution

Accuracy

cdmaOne and cdma2000: ± 2 dB

Residual ﬂoor: –50 dBc

Reference information: For cd maOne and cdma2000, the carrier feedthrough me asurement is valid only for a pilot-only signal.

Measures the absolute power of the pilot, without regard to whether other codes are present. (P-CPICH for W-CDMA.)

dBm, Watts (W): 0.1 dB

± 1.5 dB, –50 dBm to –20 dBm

Reference information: W-CDMA 3GPP Test Model 2.

other codes are present.

dBm, Watts (W): 0.1 dB

power transmitted on a single channel lies. This measurement can be properly made only if the channel being measured has no channels adjacent to it.

Hertz (Hz): Three signiﬁcant digits

5% of the reading, typical

Reference information: For TD-SCDMA signals, OBW is measured for each timeslot.

82 NetTek®YBT250 Quick Start User Manual

Table 6: Signal measurement characteristics (cont.)

Characteristic Description

Adjacent Channel Leakage power Ratio (ACLR) (W-CDMA)

Units and Resolution dB: 0.01 dB

Accuracy

ErrorVectorMagnitude (EVM) (GSM/EDGE)

Units and Resolution

Accuracy

Phase Error (GSM/EDGE)

Units and Resolution

Accuracy ± 1.0, 2 ≤ Phase Error < 12. Residual error: 2.0

Measures the ratios of the mean RRC ﬁltered power in the 5 MHz BW assigned channel to the mean RRC ﬁltered power in each of the nearest 5 MHz BW 1st and 2nd adjacent upper and lower channels. Adjacent channel centers are offset in multiples of 5 MHz from the assigned channel center. The user can enter the channel center frequency instead of the channel number.

±1.5dB,20≤ ACLR < 48 dB, typical

±2.5dB,48≤ ACLR < 53 dB, typical

–30 dBm to +20 dBm (power in assigned cha nnel)

Reference information: WCDMA Test Model 1 signal (3G PP TS25 .141). The ﬁlter response is Root-Raised Cosine (RRC), alpha = 0.22, and 3 .84 MHz noise BW (3GPP TS25.104).

Error Vector Magnitude is the normalized RMS va lue of all of the vectors that extend from the intended constellation points to the actual symbol points in a record of symbols. The EVM measurement is made over one GSM or EDGE burst.

Percent: 0.01%

±1.5%,4%≤ EVM < 10%. Residual error: 4.0%

Phase Error is the RMS value of the differences between the phase angles of the received signal and those of an ideal reconstructed signal. The Phase Error measurement is made over one GSM or EDGE burst.

Degrees: 0.01°

Speciﬁcations

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Speciﬁcations

Table 6: Signal measurement characteristics (cont.)

Characteristic Description

Origin Offset (GSM/EDGE)

Carrier to Interference (C/I) (GSM/EDGE)

Origin Offset is the ratio of unmodulated signal power to modulated signal power. The unmodulated signal component causes the signal constellation center to be offset from the ideal location. The Origin Offset measurement is made over one GSM or EDGE burst.

Units and Resolution dB: 0.01 dB

Range –15 dB to -60 dB

Carrier t o Interference (C/I) is the ratio of desired signal (carrier) to undesired signal (interference). The C/I measurement is derived from the EVM result and gives an estimate of the power-b ased C/I value. The C/I measurement is made o ver one GSM or EDGE burst.

Units and Resolution dB: 0.01 dB

Range 0 dB to 50 dB

Reference information: C/I is derived from EVM using the following equation: C/I = -20 * log10( EVM/100 )

84 NetTek®YBT250 Quick Start User Manual

Tektronix NetTek YBT250 Rev A User manual

Specifications and Main Features

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