Page 1 User Manual NetTek YBT250 Field Transmitter & Interference Tester 071-0856-14 This document supports firmware version 1.654 and above. www.tektronix.com...
Page 2 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.
Page 3 Tektronix, shipping charges prepaid, and with a copy of customer proof of purchase. 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.
Page 5: Table Of Contents
Table of Contents General Safety Summary ......Environmental Considerations ......Preface .
Page 6 Table of Contents Attaching Accessories ....... . 1- - 16 Setting Up the Tilt Stand .
Page 7 Table of Contents Changing Settings for Saved Files ..... . 2- - 45 Where to Set File Options ......2- - 45 Setting the Filename Prefix .
Page 8 Table of Contents Specifying Units for Marker Display ....3- - 17 Using Markers on a Single Trace ....3- - 18 Using Markers with Two Traces .
Page 9 Table of Contents Setting 1xEV-DO RF Power Averaging ....3- - 84 1xEV-DO Transmission Envelopes on the RF Power Screen ........3- - 85 Measuring TD-SCDMA RF Power .
Page 10 Table of Contents Pilot Dominance and Multipath Power ....3- - 135 Multiple Measurements Sequencer ..... . 3- - 136 Limit Testing .
Page 11 Table of Contents Appendix E: Functional Verification Procedure ..E- - 1 Self Tests ......... . E- - 1 Functional Tests .
Page 12 Table of Contents YBT250 Field Transmitter & Interference Tester User Manual viii...
Page 13: General Safety Summary
General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. While using this product, you may need to access other parts of the system.
Page 14 General Safety Summary Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel. Do Not Operate in an Explosive Atmosphere. Safety Terms and Symbols Terms in This Manual. These terms may appear in this manual: WARNING.
Page 15: Environmental Considerations
(WEEE). For information about recycling options, check the Support/Service section of the Tektronix Web site (www.tektronix.com). Battery Recycling. This product may contain a lithium ion (Li- - ion) rechargeable battery, which must be recycled or disposed of properly.
Page 16 Environmental Considerations Restriction of Hazardous Substances This product has been classified as Monitoring and Control equipment, and is outside the scope of the 2002/95/EC RoHS Directive. This product is known to contain lead, cadmium, mercury, and hexavalent chromium. YBT250 Field Transmitter & Interference Tester User Manual...
Page 17: Preface
Preface The NetTek YBT250 Field Transmitter & Interference Tester is part of the NetTek Base Transceiver Station (BTS) Field Tool family: a high performance, portable, field-ready tester optimized for fast trouble resolution and easy BTS performance verification. It is based on the familiar and easy-to-use Windows CE operating system, so you will spend less time learning the instrument and more time troubleshooting the network.
Page 18: Additional Information
Preface Additional Information The YBT250 Field Transmitter & Interference Tester contains online help to enable you to quickly get explanations of how to use your YBT250. The online help is the first place you should look for information about operating the YBT250. Important information about configuring and operating the NetTek Analyzer Platform is contained in the Getting Started section of this manual.
Page 19: Getting Started
Getting Started...
Page 21: The Nettek Analyzer Platform
Getting Started This section describes the Y400 NetTek Analyzer Platform, on which the NetTek YBT250 operates. The NetTek Analyzer Platform Figure 1- - 1 shows the NetTek Analyzer Platform layout. Figure 1- - 2 shows the front-panel controls and indicators. Figure 1- - 3 shows the input and output ports.
Page 22 Getting Started Figure 1- 2: Front Panel Controls 1. Power/Suspend Switch. Push on; push off. See pages 1- - 11 and 1- - 12 for additional information. 2. Reset Switch. Push to perform a hardware reset if a lock-up occurs. All programs and data loaded into volatile memory since power on are lost.
Page 23 Getting Started Figure 1- 3: I/O ports (Y400 NetTek Analyzer Platform) 1. Microphone input 2. Headphone jack 3. Ethernet connector (RJ-45) 4. Serial port (RS-232) 5. PS/2 keyboard connector 6. USB Host connector 7. USB Slave connector YBT250 Field Transmitter & Interference Tester User Manual 1- 3...
Page 24: Installing And Removing A Module
Getting Started Installing and Removing a Module If you purchased the YBT250 Application Module as a separate item, you must install the module on a NetTek Analyzer platform before you can take measurements. Refer to Figures 1- - 4 and 1- - 5 to install or remove an application module.
Page 25 Getting Started Attach bus Tighten thumb cover screws (4) Application module Bus connector Figure 1- 5: Attaching a module NOTE. Tighten the screws by pressing in slightly on them and turning them in a clockwise direction. Use the coin slot in the top of the thumb screw if you require additional torque.
Page 26: Connecting External Power Supplies
Getting Started Connecting External Power Supplies To power the NetTek Analyzer Platform from AC mains or DC vehicle voltage, or recharge installed batteries, connect the Desktop Power Supply or the In-Vehicle Adapter to the NetTek Analyzer Platform as shown in Figure 1- - 6. The Desktop Power Supply operates from 100 VAC to 240 VAC mains.
Page 27: Batteries
Getting Started Batteries Installing or Removing a Battery The NetTek Analyzer Platform comes standard with a single battery, which is not installed when the instrument is shipped. Refer to Figures 1- - 7 through 1- - 9 for battery installation or removal steps. NOTE.
Page 28 Getting Started 2. Rotate the battery retainer upward 1. Push the battery retainer tab down and towards the back of instrument, then lift Figure 1- 8: Opening the battery retainer Lift battery by strap Battery retainer in open position Install battery in any available slot Figure 1- 9: Installing/removing a battery YBT250 Field Transmitter &...
Page 29: Charging A Battery
Install the battery in either slot. You can add a second battery to increase the operating time. Replace a battery with the specified type only. To purchase a battery from Tektronix, please contact your Tektronix Service Center for the correct part number.
Page 30: Maximizing Battery Operating Time
There may be specific legal requirements in your community for battery collection and disposal. Contact your local electronics recycler, relevant legal authority, or your Tektronix representative for assistance in recycling batteries. YBT250 Field Transmitter & Interference Tester User Manual...
Page 31: Powering On The Instrument
Getting Started Powering On the Instrument To power on the NetTek Analyzer Platform, press the large blue oval front-panel switch in the lower-left corner. The green status indicator to the right of the switch lights and the system begins its power-on process.
Page 32: Setting The Stylus Centering
Getting Started Setting the stylus centering 1. Select Start > Settings > Control Panel. 2. Open the Stylus icon. 3. In the Calibration tab, select Recalibrate. 4. Follow the on-screen instructions to set the location and amount of pressure needed for the touch-screen to respond to your taps. Apply pressure to the touch-screen for approximately 5 seconds at each position, until the target moves.
Page 33: Shutdown Mode
For information on how to save these items to nonvolatile memory: 1. Select Start > Help. 2. In the Help window select Tektronix Basics. 3. Select Store Data in Nonvolatile Memory. The next time you press the front-panel power switch, the NetTek Analyzer Platform cycles through the complete power up process, taking about 30 seconds to completely power up.
Page 34: Front-Panel Power Switch
Getting Started Front-Panel Power Switch Depending on the current state of the NetTek Analyzer Platform, pressing the front-panel power switch performs one of the following functions: H If the NetTek Analyzer Platform is shut down: powers on the instrument. H If the NetTek Analyzer Platform is operating: initiates Suspend mode.
Page 35: Be Alert And Aware Of The Effects Of Lightning
Getting Started H Use your own good judgement and common sense. You must protect yourself from the effects of lightning. H You must assume that hazardous voltages will be present on exposed surfaces of this product if it is connected to a source exposed to lightning.
Page 36: Attaching Accessories
Getting Started Attaching Accessories Setting Up the Tilt Stand For floor or desktop use, attach the tilt stand to the NetTek Analyzer Platform and fold into place. See Figure 1- - 10. Attach tilt stand with thumb screws (3) Tilt stand Stylus holders Bottom thumb screw located under Velcro flap...
Page 37 Getting Started To install the tilt stand with two or more instrument modules attached, use the provided storage spacers as shown in Figure 1- - 11. You can store cables and other accessories (such as the NetTek YBGPS1 GPS Timing Reference receiver) in the spacer compart- ment.
Page 38: Installing The Shoulder Strap And Strand Hook
Getting Started Installing the Shoulder Strap and Strand Hook Use the shoulder strap to carry the NetTek Analyzer Platform to the job site. Install the strap on the instrument as shown in Figure 1- - 12. You can also install the strap on the soft case. Use the Strand hook to hang the instrument from a wire strand, ladder, or other support.
Page 39: Operating Basics
Operating Basics...
Page 41: Overview
YBT250 Field Transmitter & Interference Tester. Overview The YBT250 is a member of the Tektronix NetTek Series of modular instruments that are based on the NetTek Analyzer Platform. A NetTek Series instrument consists of a hardware module, application software, and the NetTek Analyzer Platform.
Page 42: Getting Help
Operating Basics Getting Help To open the Help window and obtain general information on YBT250 topics, tap Start > Help and select YBT250. There are three ways to display Help when you are running the YBT250 software: H Tap the icon in the upper-right corner of the YBT250 display.
Page 43: Navigating The Desktop
Operating Basics Navigating the Desktop The NetTek Analyzer Platform desktop is your primary workspace. Use the desktop to configure hardware and software, adjust settings, establish communications, and access built-in applications. Desktop Icon Taskbar Icons Double-tap desktop icons to open folders or to start programs. Taskbar The Taskbar contains the Start menu, buttons to identify the programs you are running, a status area, and a desktop icon.
Page 44 Operating Basics Start menu Desktop button Program button Status area Start Menu. Use the Start menu to load and run other instrument modules and other programs, access settings, open documents, and obtain help. Select (tap) Start to open the menu; then select the entry you want.
Page 45 Operating Basics Table 2- 2: Status area icons Tap this icon Details Double-tap to open the Power The analyzer is operating Management utility. on external AC power. Double-tap to open the Power The analyzer is charging Management utility. batteries. Double-tap to open the Power The analyzer is operating Management utility.
Page 46: Starting The Ybt250 Software
Operating Basics Starting the YBT250 Software If you purchased your YBT250 installed on NetTek Analyzer Platform, it comes from the factory set to automatically start the YBT250 software when you power on the NetTek Analyzer Platform. If you added your YBT250 module to a NetTek Analyzer Platform you already own, see page 2- - 7 for instructions on how to start the YBT250 software or set the software to load at startup.
Page 47: Setting The Ybt250 Software To Load At Startup
NetTek Analyzer Platform, you can set the YBT250 to load at startup. To set the YBT250 as the startup application: 1. Select Start > Programs > Tektronix Utilities > System Configuration. 2. On the Software tab, select the StartUp checkbox for the YBT250.
Page 48: Elements Of The Display
Operating Basics Elements of the Display Figure 2- - 3 shows shows the four key areas of the YBT250 Field Transmitter & Interference Tester display. Tuning controls Command bar area Measurement area Shared control area Figure 2- 3: YBT250 display elements H Tuning Controls Area: This area contains the controls used to specify the signal standard and measurement frequency.
Page 49: Shared Control Area
Operating Basics H Shared Control Area: This area contains GPS and reference frequency status buttons, the instrument measurement function buttons, and the control knob and associated fields. See page 2- - 9. H Measurement Area: This area contains the measurement results and waveform displays.
Page 50: Command Bar Area
Operating Basics Table 2- 3: Shared control area elements (Cont.) Button Function Displays the Interference window if the appropriate options are installed. See page 3--36 for descrip- tions of Interference display buttons and icons. Displays the measurement Sequencer window. This window provides a way to display multiple measurement results in a single window.
Page 51: Tuning Control Area
Operating Basics Table 2- 4: Command bar area elements (Cont.) Button/Icon Function Displays the Open dialog box, which enables you to select a saved setup to load. Replaces the Edit button when Hide Setup Controls is selected. Toggles between running and pausing (stopping) measurements.
Page 52: Measurement Area
Operating Basics Table 2- 5: Tuning control area elements (Cont.) Button Function This button is used to set the Channel number. The frequency will be set to the appropriate value for the selected channel. Tap the button to use the numeric keypad;...
Page 53: Using The Knob
Operating Basics Using the Knob To assign the knob to a control, tap the control to be changed. Change the value by: H Tapping the left/right arrows on the bottom half of the control knob to make small changes H Tapping to the left or right of the small circle (on the top half) to make larger changes H Placing a finger inside the “circle”...
Page 54 Operating Basics Table 2- 6: The File menu (Measure window) Menu item Control key Description Open Ctrl + O Displays the Open Results dialog box. Save Results Ctrl + S Save measurement results to a file. The file is automatically named and stored in \BuiltInDisk\YBT250\App- Data\Results.
Page 55 Operating Basics Table 2- 7: The File menu (Spectrum/Interference windows) Menu item Control key Description Open Ctrl + O Displays the Open Results dialog box. Save Trace Ctrl + S Saves a Trace to a file. The file is automatically named and stored in \BuiltInDisk\YBT250\AppData\Re- sults.
Page 56 Operating Basics Table 2- - 8 describes the View menu elements. Table 2- 8: The View menu Menu item Control key Description Trace 2 ------ Displays/Hides second trace. Rotate Trace Order ------ Changes the order of traces in the graph (front versus back). Define Trace 2 ------ Displays the Trace 2 &...
Page 57 Operating Basics Table 2- - 9 describes the elements of the Setup menu. Table 2- 9: The Setup menu Menu item Control key Description Edit.. Ctrl + T Displays the Setup window. Open... ------ Displays the Open Setup dialog box. Save...
Page 58: Entering Text
Operating Basics Table 2- 10: The Tools menu (Cont.) Menu item Control key Description Upgrade Software ------ Displays the utility for enabling soft- ware options or installing a new version of the YBT250 application. Technical Support ------ Displays technical support contact information.
Page 59 Operating Basics Figure 2- 4: The Soft Keyboard To set soft keyboard properties, or switch between a large keyboard (default) and a smaller keyboard, select Start > Settings > Control Panel. Open the Input Panel icon, and then select Options. YBT250 Field Transmitter &...
Page 60 Operating Basics YBT250 Field Transmitter & Interference Tester User Manual 2- 20...
Page 61: Connecting A Signal
1. The Timing Input connects 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. The Frequency Reference Input 3. The RF Input connects to the RF signal source or measurement antenna.
Page 62: Rf Signal Input
Connecting a Signal RF Signal Input The RF input characteristics are: H The input impedance is 50 Ω. H The input frequency range is from 30 MHz to 2500 MHz. H The maximum continuous input power is 1 W. CAUTION. To prevent damage to the YBT250, continuous input signals should not exceed 1 Watt.
Page 63 Connecting a Signal CAUTION. To prevent damage to the YBT250, continuous input signals should not exceed 1 Watt. If a signal between 1 Watt and 50 Watts is connected to the input, the input protection circuitry displays a warning and halts operation until the input overload is corrected.
Page 64 Connecting a Signal Figure 2- 7: Changing RF input settings b. If you are not using external attenuation or amplification, verify that the No external attenuation or amplification setting is selected. c. If you are using an external attenuator, select External attenuator connected.
Page 65: Connecting A Timing Reference
H Use an external frequency reference to create and store custom frequency correction factors with the YBT250 (see page 2- - 28) H Use the Tektronix YBGPS1 GPS Timing Reference to provide GPS-derived timing accuracy (GPS information starts on page 2- - 51)
Page 66 Connecting a Signal The external reference signal requirements are: H The YBT250 locks on to signals that are within 1 ppm of an acceptable frequency. H The external frequency reference input impedance is 50 ohms. H The signal level is between - - 15 dBm and +15 dBm. Table 2- - 11 lists the acceptable external frequency reference signals.
Page 67 Connecting a Signal To verify that the YBT250 recognizes the frequency reference signal, do the following: 1. Tap the EDIT button. 2. Tap the Inputs tab. When the YBT250 recognizes an external frequency reference, the External Frequency Reference Input field displays an icon identifying the reference type, and text providing signal information.
Page 68: Creating Frequency Correction Factors
Connecting a Signal Creating Frequency Correction Factors You may be able to improve frequency measurement accuracy by creating custom frequency correction factors using the YBT250 frequency correction utility. This utility compares the YBT250 internal frequency reference to an external reference and calculates correction values to align the internal frequency reference with the external reference.
Page 69 Connecting a Signal Figure 2- 9: The Frequency Correction dialog 4. To calculate new frequency correction values, tap Run New Correction. This displays the dialog shown in Figure 2- - 10. Figure 2- 10: Ready to calculate new correction values YBT250 Field Transmitter &...
Page 70 Connecting a Signal If the reference frequency is detected, the frequency is shown in the dialog box. If the reference frequency is not detected, “- - - - ” is displayed instead of a frequency. If the reference frequency is not displayed within 15 seconds, check the connection to the external frequency reference.
Page 71 Connecting a Signal Figure 2- 12: The Frequency Correction dialog 7. To use the new frequency correction values, select Use Corrected Values, then tap OK. YBT250 Field Transmitter & Interference Tester User Manual 2- 31...
Page 72 Connecting a Signal YBT250 Field Transmitter & Interference Tester User Manual 2- 32...
Page 73: Changing Instrument Settings
Changing Instrument Settings Before you can fully utilize the YBT250 you need to set some instrument settings. For example, the YBT250 displays measure- ments only for enabled signal standards. If the signal standard used in your system is not enabled, you will not be able to take measure- ments for your system until you enable the Signal Standard.
Page 74 Changing Instrument Settings Figure 2- 13: The Signal Standards tab 3. Tap the name of the standard in the left-side list that you want to enable. 4. Tap Add>> to add the standard to the right list field. 5. When you have enabled all the standards you will be testing, tap Only enabled standards are selectable from the signal standards list that appears in the tuning controls area of the display.
Page 75: Setting Display Preferences
Changing Instrument Settings Setting Display Preferences You can change the color scheme used in the instrument display. There are three color schemes,one monochrome scheme, and a color scheme optimized for black and white printouts. Color schemes specified in the YBT250 do not affect standard Windows CE screen items.
Page 76: Setting Up The Channel Table
Changing Instrument Settings 5. Tap OK to save the change. 6. To view the changed color scheme, exit and restart the YBT250 program. To change the Windows CE display properties, tap Take Me There. This displays the Windows CE Display Properties window, where you can set the display background and window color scheme.
Page 77 Changing Instrument Settings Figure 2- 15: The Channel Table tab 4. To enable a channel: a. Tap the box in the Mark column next to the desired channel. Enabled channels are marked with an X. b. You can mark all channels by tapping the Mark All Channels button.
Page 78 Changing Instrument Settings 5. To disable a selected channel: a. Tap the box in the Mark column next to the enabled channel so that the box is empty. b. You can disable or “unmark” all channels by tapping the Clear All Channels button. 6.
Page 79 Changing Instrument Settings Figure 2- 16: The Channel Wizard 6. To set the last channel number: a. Tap the numeric keypad button next to the Last Channel box. b. Tap the appropriate numbers to set the last channel number. c. Tap OK when finished. 7.
Page 80: Customizing The Channel Table
Changing Instrument Settings c. To replace the current channel table with the specified selections, select Replace the current table with these channels. d. Tap OK when finished. 8. Tap OK to close the Setup window. Customizing the Channel Table The Channel Table is a file used by the YBT250 to specify the characteristics of the channels assigned to a signal standard.
Page 81 Changing Instrument Settings 3. Rename signalstandards.txt to userstandards.txt. 4. Edit the contents of the file to suit your systems settings. When editing your userstandards.txt file, it is safer to copy a row and then edit the copied row to meet your requirements than to modify an existing row.
Page 82 Changing Instrument Settings Table 2- 12: Channel table file contents (Cont.) Column heading Description Reverse Base Frequency Reverse base frequency for each signal standard. The actual frequency for each channel is calculated. For signal standards that specify a single frequency for each channel (for example, the UTRA/FDD scheme used by W-CDMA (UMTS)), each row in the file will describe a group of forward or a group of reverse channels.
Page 83 Changing Instrument Settings Table 2- 12: Channel table file contents (Cont.) Column heading Description Signal Type 1 = CDMAOne 2 = AMPS 3 = TDMA IS136 4 = GSM/EDGE 5 = W-CDMA (UMTS) 6 = CDMA 2000 10 = CDMA 2000 1xEV--DO 998 = NO_MEAS_ANALOG 999 = NO_MEAS_DIGITAL Forward / Reverse...
Page 84: Specifying The Signal Type
Changing Instrument Settings Specifying the Signal Type The Channel Table file contains a field that defines the type of signal for the named signal standard. For example, the standard named GSM 900 is designated as a Signal Type 4. The Signal Type is used by the Signal Identification function to suggest possible sources of interference.
Page 85: Changing Settings For Saved Files
Changing Instrument Settings Where: Base Frequency: Either forward or reverse base frequency depending on current user selection, from the Channel Table file (userstan- dards.txt when present or signalstandards.txt). Chan Num: The current user selected channel number. Chan Freq: The frequency associated with the Chan Num. Channel Spacing: The distance between channels, from the Channel Table file.
Page 86: Setting The Filename Prefix
Changing Instrument Settings Figure 2- 17: The Save & Export tab Setting the Filename Prefix The YBT250 allows you to save a file, such as a results file, with a name you enter each time you save a file or you can allow the YBT250 to automatically name files for you.
Page 87: Setting The Technician Name
Changing Instrument Settings To specify the filename prefix: 1. Tap the Edit button. 2. Tap the Save & Export tab. See Figure 2- - 17. 3. Tap the box after File Prefix:. 4. Enter text (using the soft keyboard or an external keyboard) to use as the prefix of filenames.
Page 88: Setting Up A Gps Receiver
Changing Instrument Settings 4. Enter text (using the soft keyboard or an external keyboard) for the note. 5. Tap OK to save the notes you entered. When viewing a saved results file, you can view any saved notes by selecting File > Results Properties. Setting Up a GPS Receiver Refer to page 2- - 51 for information about selecting and setting up a Global Positioning System (GPS) receiver so that you can save GPS...
Page 89: Setting The Default Save Location For Automatically Saved Spectrogram And Codogram Files
Changing Instrument Settings Setting Default Save Location for Automatically Saved Spectrogram and Codogram Files You can set the default location to which you save and export screens and results files for spectrograms and codograms. This feature can be useful when, for example, you are saving many spectrograms and codograms to a PCMCIA memory card over a long period of time in an unattended mode.
Page 90 Changing Instrument Settings YBT250 Field Transmitter & Interference Tester User Manual 2- 50...
Page 91: Gps
GPS receivers with an RS232 serial output capability) to obtain and record measurement location and time. The Tektronix YBGPS1 GPS Timing Reference, in addition to providing standard geographic location information, also provides a Timing Reference signal for taking cdma2000 (Option CS1) or...
Page 92: Ybt250 Gps Configuration
YBT250 GPS Configuration To configure your GPS receiver with the YBT250, do the following: 1. Connect your GPS receiver to the NetTek Analyzer Platform. Refer to the GPS receiver instructions for details. 2. Tap the status button to open the GPS tab. See Figure 2- - 18. Figure 2- 18: The GPS tab 3.
Page 93: Gps Signal Status Button
You are now ready to use the GPS receiver to record and save measurement location data along with your measurements. If you are using the Tektronix YBGPS1 GPS Timing Reference, and have option CS1, see Taking cdma2000 or 1xEV-DO OTA Measurements for how to enable cdma2000 or 1xEV-DO OTA measurements.
Page 94: Gps Receiver Field
H NMEA (PCMCIA): Select this when there is a GPS receiver connected to the NetTek Analyzer Platform PCMCIA card slot. H Tek GPS Timing Ref: Select this when there is a Tektronix YBGPS1 GPS Timing Reference unit connected to the YBT250 and the NetTek Analyzer Platform.
Page 95 Satellites In Use indicates the number of locked satellite signals, and displays an associated status icon. H Green: The GPS receiver is locked to four or more satellites. H Yellow: The number of locked satellites has recently dropped below four. If the GPS receiver does not detect four or more satellites in a short period, this status changes to red.
Page 96: Gps Information Field
The four common DOP values are PDOP, HDOP, VDOP, and TDOP (3- - D position, horizontal position, vertical position, and time). Timing is the major function of the Tektronix YBGPS1, so TDOP is the important DOP value for this product.
Page 97: Gps Satellite Signal Strength Field
States generally use the NAD27 model to calculate position. Many GPS receivers reference their altitude calculations to mean sea level (MSL). The Tektronix YBGPS1 GPS Timing Reference uses the WGS84 HAE altitude model, which is similar to the NAD83 model used by surveyors.
Page 98: Saving Gps Data With Measurements
Figure 2- 21: The GPS Satellite Signal Strength field Saving GPS Data with Measurements The YBT250 automatically saves location, time, and date informa- tion with measurements whenever the GPS receiver is active and acquiring accurate location data. For accurate measurement records, make sure to save or export your results at the location where you made the test.
Page 99 H If required, check that your GPS receiver is powered on, or there is sufficient power left in the battery. Note that the Tektronix YBGPS1 GPS Timing Reference draws its power from the NetTek Analyzer Platform, and is powered on as soon as it is connected to the NetTek Analyzer Platform.
Page 100 may help you diagnose GPS to NetTek Analyzer Platform communications problems. vxHpc provides a broad range of terminal emulations, includes telnet (TCP/IP) communications capability, terminal emulation over the serial port, file transfer and scripting. The vxHpc software is fully functional for 30 days after its first use, after which you will have to purchase a license from Cambridge Computer Corporation.
Page 101: Reference
Reference...
Page 103: Displaying A Signal Spectrum
Displaying a Signal Spectrum You can use the YBT250 Field Transmitter & Interference Tester to display the spectrum and the spectrogram of a signal. The spectrum display shows the signal level at different frequencies, all at once. The spectrogram displays hows the signal level varies over time, providing a history of the signal.
Page 104 Displaying a Signal Spectrum Table 3- 1: Spectrum and Spectrogram buttons and icons Button Function This tab selects the normal spectrum display. This tab selects the spectrogram display (requires Option IN1, Interference Analyst). This drop-down list specifies the trace type. See Table 3--2.
Page 105 Displaying a Signal Spectrum Table 3- 1: Spectrum and Spectrogram buttons and icons (Cont.) Button Function Indicates the Stop frequency (the highest displayed frequency). Undo button moves the waveform in the display back to its previous position or resets the value of the last item touched in the graph.
Page 106: Displaying A Trace
Displaying a Signal Spectrum Displaying a Trace To display a spectrum trace: 1. Connect a signal (see page 2- - 22) from a test port to the YBT250 RF INPUT connector. 2. If there is no test port: a. Verify the transmitter is not transmitting power to the antenna.
Page 107: Setting Trace Display Options
Displaying a Signal Spectrum Setting Trace Display Options You can change how a trace is displayed to make it easier to analyze a signal. Table 3- - 2 lists the available trace types. Table 3- 2: Trace display options Trace type Description Normal Each point in the trace represents a single acquisition.
Page 108 Displaying a Signal Spectrum Select Trace type from this list Figure 3- 2: Setting the trace type You can also set the trace type in the Setup window: 1. Tap the Edit button. 2. Tap the Spectrum tab. See Figure 3- - 3. Figure 3- 3: The Spectrum tab YBT250 Field Transmitter &...
Page 109: Changing The Vertical Scale Of The Spectrum Display
Displaying a Signal Spectrum 3. Select the desired trace type from the drop-down list. If you select Average, you can also set the number of traces averaged together to create the trace display. The default number of averages is 5. This number applies to both Trace 1 and 2. a.
Page 110: Changing The Vertical Position Of The Trace
Displaying a Signal Spectrum 2. Change the vertical scale by: a. Tapping the numeric entry keypad button and entering a new value, or b. Tapping the left/right arrows below the knob to change the vertical scale value, or c. Dragging the top portion of the knob to set the new value. When the vertical scale is set to a value that causes the trace to expand beyond the display area, a scroll bar appears at the right side of the trace display.
Page 111: Changing The Horizontal Position Of The Trace
Displaying a Signal Spectrum Changing the Horizontal Position of the Trace To change the horizontal position of the trace: H Touch inside the graph, and keeping your finger on the screen, drag the trace to the desired position. You do not have to touch the trace itself.
Page 112: Saving Traces
Displaying a Signal Spectrum Saving Traces You can save a trace for later recall. For example, you can save an example of a known good trace to compare with a live trace later. To save a trace with an automatically generated filename, select File > Save Trace.
Page 113: Displaying A Saved Trace
Displaying a Signal Spectrum Displaying a Saved Trace You can display a previously saved trace for review or comparison with another trace. To display a saved trace: 1. Select File > Open. The Open dialog box appears. 2. Locate the saved trace, tap the name of the trace and then tap NOTE.
Page 114: Defining Trace 2
Displaying a Signal Spectrum Defining Trace 2 Trace 2 can be a live trace (for example, an averaged display of the latest acquisitions) or a saved trace. To define Trace 2: 1. Select View > Define Trace 2... The Settings window appears with the Trace 2 &...
Page 115: Comparing Two Trace Results Files
Displaying a Signal Spectrum Comparing Two Trace Results Files To compare two saved results: 1. Select File > Compare Saved..The Open dialog appears. See Figure 3- - 7. For the first result selected, the dialog box is labeled Select first result file to compare. Figure 3- 7: Selecting the first result file 2.
Page 116 Displaying a Signal Spectrum 5. Tap OK. The trace stored in this second file is displayed as Trace 2. The timestamp displayed next to the Open Folder indicator on the toolbar is associated with the trace file that is displayed in the foreground.
Page 117: Displaying Markers
Displaying a Signal Spectrum Displaying Markers The YBT250 Field Transmitter & Interference Tester uses markers to measure differences in the frequency and level of the displayed trace. You can move markers by tapping and dragging the markers on the graph. To display the markers, select View >...
Page 118 Displaying a Signal Spectrum There are four readouts associated with markers, located at the bottom of the display. See Figure 3- - 11. The marker readouts are: H Measurement Frequency level and frequency H Marker 1 (M1) frequency and level H Marker 2 (M2) frequency and level H Difference in frequency and level between M1 and M2 (M1- - M2) (when mask testing is not enabled) OR...
Page 119: Specifying Units For Marker Display
Displaying a Signal Spectrum The symbol on the trace display Frequency of trace at associated with this readout Marker (in MHz) Identifies function of readout Level of trace at Marker (Measurement Frequency, (in dBm or Watts) Marker 1 or 2, or difference between M1 and M2) Figure 3- 12: The Marker readout Specifying Units for Marker Display...
Page 120: Using Markers On A Single Trace
Displaying a Signal Spectrum Using Markers on a Single Trace To measure the difference in frequency and level between two points on a single trace: 1. Display the markers by selecting View>Markers. 2. Tap the M1 readout. This assigns the marker to the knob and to the touch screen in the display area.
Page 121: Markers And Mask Testing
Displaying a Signal Spectrum Table 3- 3: Marker placement (Cont.) Menu selection Location of markers Both markers remain on Trace 1 (rotating the Both on Trace 1 trace order does not change the marker assignment). Both markers remain on Trace 2 (rotating the Both on Trace 2 trace order does not change the marker assignment).
Page 122: Band Edge Cursor
Displaying a Signal Spectrum Band Edge Cursor The Band Edge cursors identify the start and stop frequencies for the transmit or receive bands of the selected standard. See Figure 3- - 14. (Transmit or receive band is selected using the Uplink and Downlink buttons.) There are two parts to the band edge cursors: the main part appears in the main trace display, and the second part appears along the top...
Page 123: Displaying A Spectrogram
Displaying a Signal Spectrum To turn off the display of Band Edge Cursors, select View > Band Edge Cursor so that it is not checked. See Figure 3- - 15 on page 3- - 21. Figure 3- 15: Band Edge Cursor turned off; top part visible Displaying a Spectrogram Requires Option IN1, Interference Analyst A spectrogram displays the record of over time.
Page 124 Displaying a Signal Spectrum Figure 3- 16: A spectrogram Remember the following while viewing a spectrogram: H Select the Restart icon to clear the trace history and restart collecting data. H Select Updates... to change how often the spectrogram is updated.
Page 125: Setting The Spectrogram Update Rate
Displaying a Signal Spectrum indicate that the spectrum was acquired during an Input Overrange condition. When a Spectrogram is acquired during an Input Overrange condition, the resulting trace data may still be valid, but it may also contain IM (Inter-Modulation Distortion) products that are internally generated.
Page 126 Displaying a Signal Spectrum 3. Set the full-screen data collection time by selecting either Full Screen, Trace Interval, or Fastest Possible from the Set Collection Time drop-down list: H Full Screen sets how long it takes the instrument to fill the spectrogram screen (80 records).
Page 127: Mask Testing
Displaying a Signal Spectrum Mask Testing Mask testing is used to determine if a signal exceeds specified levels. The YBT250 can perform several actions when an input signal exceeds limits defined by a mask. The default action is to display an icon ( ) to the right of the graph (which cannot be switched off) and sound a beep (which can be switched off).
Page 128 Displaying a Signal Spectrum Figure 3- 18: The Mask Maker utility If Mask testing was already enabled for the Spectrum display, the selected mask is displayed in the Mask Maker window. If Mask testing was not enabled, a new default mask (the pulse-shaped trace) is displayed.
Page 129 Displaying a Signal Spectrum Alternatively, you can move points by using the keypad or the cursor keys: 1. Tap the value in the table (the number in either the x(MHz) column or the y(dBm) column) you want to adjust. If the cursor arrows are displayed above the table, tap the keypad icon to display the keypad.
Page 130 Displaying a Signal Spectrum Deleting a trace from a mask. To delete a trace from a mask: Tap the down arrow on the trace selector. 2. Select the trace to delete from the list. If the edit points option button is selected, you can also select a trace by touching it near one of its points.
Page 131 Displaying a Signal Spectrum If you place points outside the visible area of the graph, tap the rescale button to bring all points into view. If you accidentally delete a point or a trace, you can undo the last delete action by tapping the Undo Delete button. Tap the numeric keypad to switch to the numeric keypad from the cursor keys.
Page 132 Displaying a Signal Spectrum Table 3- 4: Mask maker buttons and icons (Cont.) Button/Icon Description Delete Point. Tap to delete the selected point from the mask. Delete Trace. Tap to delete the selected trace from the mask. Trace Select list box. Tap to select which trace to edit. Undo Delete.
Page 133: Defining (Loading) A Mask
Displaying a Signal Spectrum Defining (Loading) a Mask Before you can perform a mask test, you must define (load) the mask to use for testing. If you have not yet created a mask, see Creating a Mask on page 3- - 25. To define a mask: 1.
Page 134: Performing A Mask Test
Displaying a Signal Spectrum Performing a Mask Test To perform a mask test, select View > Mask so that there is a check mark next to Mask. The defined mask is displayed, with the mask centered on the current Measurement Frequency. If the signal trace exceeds the mask, the violation icon ( appears on the right side of the spectrum graph and the violated mask trace changes color (the specific color depends on the selected...
Page 135 Displaying a Signal Spectrum The YBT250 displays the M1 marker difference as 10 dB because the signal is closer to the upper limit than it is to the lower limit. As another example, assume the upper limit mask trace level is 0 dBm, the signal level is - - 30 dBm and the lower limit mask trace level is - - 25 dBm.
Page 136 Displaying a Signal Spectrum YBT250 Field Transmitter & Interference Tester User Manual 3- 34...
Page 137: Locating Interference
Locating Interference To locate interference, you need Option IN1 (Interference Analyst), Option ES1 (1xEV-DO PN Scanner), Option GS1 (GSM PN Scanner), or Option WS1 (W-CDMA Scrambling Code Analyzer), installed on the YBT250. These options provide several methods to locate and identify many types of interfering signals. The YBT250 can identify interference signals, demodulate AM or FM audio signals, assess the strength of an interfering signal, and measure the noise floor on receive channels.
Page 138 Locating Interference Table 3- - 5 describes the function of each of the Interference window buttons and icons. Table 3- 5: Interference window buttons and icons Buttons/Icon Function This button starts the automatic identification function (Identify tab only). Adjusts the volume of the speaker when listening to demodulated signals (Strength and Audio tab only).
Page 139: Displaying A Spectrum Trace
Locating Interference Displaying a Spectrum Trace To begin searching for an interfering signal, you usually begin by displaying a spectrum trace. To display a spectrum trace: 1. Connect the signal from an antenna to the YBT250 RF INPUT. 2. Select a signal standard. 3.
Page 140: Identifying A Signal
Locating Interference Identifying a Signal Requires Option IN1 Once you can see a signal that you think may be interfering, you can use the automated identification function to identify the signal. The YBT250 will make an estimate of the signal type, choosing between GSM, cdmaOne/cdma2000/1xEV-DO, W-CDMA, IS-136, and analog FM signal types.
Page 141: Locating An Interfering Signal
Locating Interference Figure 3- 21: Results of an identification test Locating an Interfering Signal Requires Option IN1 By attaching a directional antenna to the YBT250, you can locate the source of an interfering signal by measuring the strength of the interfering signal.
Page 142 Locating Interference Figure 3- 22: Example of a signal strength display 6. To locate an interfering signal, point the directional antenna in different directions. As you change the direction of the antenna, you will hear a change in the audible tone and beep (if switched on) and see a change in the Strength bar.
Page 143: Demodulating An Interfering Signal
Locating Interference You can change the volume of the audible tone using the slider control at the bottom-left of the results display area. The Beep causes the audible tone to switch on and off at a rate that varies with the signal strength. The stronger the signal, the faster the audible tone beeps.
Page 144 Locating Interference Figure 3- 23: Example of an Audio Demod display 5. Select a demodulation type and bandwidth from the Demodula- tion box on the lower-right of the results area. The YBT250 will play the demodulated signal through the speaker. While the audio plays, the trace display is frozen briefly.
Page 145: Measuring The Noise Floor
Locating Interference Measuring the Noise Floor Requires Option IN1 Noise Floor 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, the Noise Floor must be measured on a disabled channel (a channel that is not carrying live traffic).
Page 146: Locating Intermittent Interference
Locating Interference 4. Select a channel. Tap the Reverse Link button. Tap the Interference button. 7. Tap the Noise tab. The Noise Floor measurement is displayed below the trace display. Noise Floor is displayed in dBm, with a resolution of 0.1 dB.
Page 147 Locating Interference Figure 3- 25: Intermittent signal Spectrogram display 6. To locate an intermittent signal, sweep the antenna along the horizon and then vertically, while looking for bursts matching the interfering signal on the spectrogram. Time in the spectrogram display runs from the bottom to the top, with the most recent data at the bottom of the display.
Page 148 Locating Interference b. Use the knob to change the position of the data record cursor ( the cursor value can vary from 1 to 80). Each record will display the date and time it was recorded to the right of the Data Record box. 2.
Page 149: W-Cdma Scrambling Code Analyzer
Locating Interference W-CDMA Scrambling Code Analyzer Requires Option WS1 The W-CDMA Scrambling Code Analyzer detects the scrambling code and pilot power level of each received downlink signal when multiple signals are present. The scanner is intended for off-air reception using an antenna, and measures only downlink signals. The maximum number of signals that can be detected is ten.
Page 150 Locating Interference Table 3- - 6 describes the Scrambling code measurements. Table 3- 6: Scrambling code measurement fields Field Description Total Power (Io) The received power in the W-CDMA signal bandwidth, in dBm. (Io is also known as No or RSSI.) Scrambling The Primary Scrambling Code number of each detected downlink...
Page 151: Sorting Or Locking Scrambling Codes
Locating Interference Sorting or Locking Scrambling Codes You can sort or lock the current set of scrambling codes. To sort the results, select one of the following choices: H Power (Ec) to sort by descending Ec level. (See Figure 3- - 26.) H Scrambling Code (SC) to sort by ascending Scrambling Code index.
Page 152: Cdma2000 And 1Xev-Do Pn Scanners
PN scanner measurements require that YBT250 option CS1 (for cdma2000 standards) and/or ES1 (for 1xEV-DO standards) is installed and that a Tektronix YBGPS1 GPS Timing Reference receiver is installed and active. To use the cdma2000 or 1xEV-DO PN Scanner: 1.
Page 153 Locating Interference Figure 3- 27: A typical cdma2000 PN Scanner display The following tables describe the cdma2000 and 1xEV-DO PN Scanner controls and measurements. Table 3- 7: cdma2000 and 1xEV-DO PN Scanner controls Field Description Lock PN Offset Values Locks and holds the current set of PN offsets in the display.
Page 154 Locating Interference Table 3- 8: cdma2000 and 1xEV-DO PN Scanner measurement fields Field Description Total Power (Io) cdma2000: The received power in the signal bandwidth (1.23 MHz), in dBm. 1xEV-DO: The total received power in the pilot intervals of the signal, in the signal bandwidth (1.23 MHz), in dBm.
Page 155: Gsm Channel Scanner
Locating Interference approximately equal level, one or more of the transmitters may need adjustment to prevent excessive interference in that location. Results are normally displayed in descending order of Ec/Io level in the graph and table. As Ec/Io varies, PN offset values may change order or disappear from the display.
Page 156 Locating Interference To use the GSM channel scanner: 1. Connect the antenna and filter (if used) to the RF input using high quality cabling. See the note on page 3- - 58. 2. Select a GSM/EDGE signal standard. 3. Select a channel. Tap the Interference button.
Page 157 Locating Interference The following tables describe the GSM channel scanner controls and measurement fields. Table 3- 9: GSM channel scanner controls Field Description Autolevel Adjusts the graph vertical scale to provide an optimized graph display. This does not change any instrument settings.
Page 158 Locating Interference Table 3- 9: GSM channel scanner controls (Cont.) Field Description Enable Demodulation Sets the instrument to take and display GSM, C/I and check box (adjacent to BSIC (NCC, BCC) demodulation measurements for each channel in the selected channels. Selecting only those channels for measurement table) which you need measurements speeds up the measurement acquisition rate.
Page 159 Locating Interference Table 3- - 10 describes the GSM channel scanner measurements. Table 3- 10: GSM Channel Scanner measurement table Field Description Marker readout The measurement values at the current channel (located above the marker location (selected channel on the graph). The measurement table) marker measurements include GSM, C/I and BSIC (NCC, BCC) demodulation measurements, even if...
Page 160 Locating Interference Table 3- 10: GSM Channel Scanner measurement table (Cont.) Field Description Carrier to Interference ratio (C/I) is the ratio of desired signal (carrier) power to undesired signal (interfer- ence) power, in dB units. The NetTek C/I value is derived from the EVM result, and gives an estimate of the power-based C/I value.
Page 161: The Gsm Channel Scanner Process
Locating Interference The GSM Channel Scanner Process The following steps describe the GSM channel scanner measurement process: 1. The GSM channel scanner measures the RF power (200KHz BW) of all specified channels, and displays the RF power values on the graph and in the Power column of the measurement table. The Marker channel (current selected channel) is plotted in red.
Page 162: Measuring Emf
Locating Interference 4. The GSM channel scanner then starts the measurement sequence over again from the first step. NOTE. The function of the blue graph plots is to identify the channels that are selected for demodulation measurements. The change in color from dark blue to light blue indicates only that a demodulation measurement attempt was made, and that the graph plot and measurement table have been updated with the results of the...
Page 163 Locating Interference Figure 3- 29: EMF RF Field Strength. Table 3- - 11 describes the EMF RF Field Strength measurements. Table 3- 11: EMF RF Field Strength measurement fields Field Description Restart Clears and restarts the measurement averaging. Field Strength The EM power at one frequency with no reference to any modulation.
Page 164 Locating Interference Table 3- 11: EMF RF Field Strength measurement fields (Cont.) Field Description Averaging n.n of x.x The time period over which to average measure- ments. The range is from 0.1 to 10 minutes. The default value is six minutes. When the specified averaging interval is reached, the averaging period becomes a rolling memory of the most recent x.x minutes of measurements.
Page 165 Locating Interference Figure 3- 30: EMF WCDMA Field Strength. Table 3- 12: EMF W-CDMA Field Strength measurement fields Field Description Restart Clears and restarts the measurement averaging. Scr Code The Scrambling Code index. The power of the detected pilot channel. Peak The highest power level detected during the averaging period.
Page 166 Locating Interference Table 3- 12: EMF W-CDMA Field Strength measurement fields (Cont.) Field Description Averaging n.n of x.x The time period over which to average measure- ments. The range is from 0.1 to 10 minutes. The default value is six minutes. When the specified averaging interval is reached, the averaging period becomes a rolling memory of the most recent x.x minutes of measurements.
Page 167: Emf Cable/Antenna Factors
Locating Interference NOTE. To make accurate measurements of the forward link signals, use a receive antenna with a frequency response and bandwidth 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.
Page 168: Emf Cable/Antenna Factors Tables
Locating Interference EMF Cable/Antenna Factors Tables The cable loss and antenna factor data is stored in tab-delimited or comma-separated value (CSV) format ASCII text files in non-vola- tile memory. The instrument searches for these files in the following location and file names: BuiltInDisk\YBT250 EMF Antenna Factors.txt BuiltInDisk\YBT250 EMF Cable Loss.txt BuiltInDisk\YBT250 EMF Antenna Factors.csv...
Page 169: Emf Cable/Antenna Factors Table Format
Locating Interference EMF Cable/Antenna Factors Table Format Observe the following guidelines when editing or creating cable loss or antenna factor files: H Each file contains an optional header row, followed by one or more rows containing a frequency and an offset value separated by a comma or tab.
Page 170 Locating Interference YBT250 Field Transmitter & Interference Tester User Manual 3- 68...
Page 171: Taking Measurements
Taking Measurements The YBT250 provides measurement capabilities to quickly and easily determine the condition of a transmitter. Measurements are available to measure power, spectral response and modulation. The Measure Window Display The Measure window displays measurement results for the selected measurement appear.
Page 172: Setting The Measurement Frequency
Taking Measurements Setting the Measurement Frequency The frequency at which measurements are made is called the Measurement Frequency. Before making a measurement, you must ensure the Measurement Frequency is properly set. The measurement frequency is indicated on the spectrum display in two ways.
Page 173 Taking Measurements H Enter the measurement frequency with the numeric keypad H Use the knob control to set a frequency To set the measurement frequency by tapping the display: 1. If Markers are displayed, tap the Measurement Frequency Marker box (labeled as Trace 1/2). 2.
Page 174: What Measurements Are Available
Taking Measurements 2. Enter the specific frequency at which you want to make measurements by tapping the keypad. You enter a frequency by tapping a number followed by a multiplier. You must include the multiplier (GHz, MHz, kHz, or Hz) to complete your input. For example: H To enter a frequency of 370 MHz, tap 3 7 0 MHz.
Page 175: Measuring Rf Power
Taking Measurements Measuring RF Power Requires option AR1, IR1, CR1, or WR1 RF Power can be measured by itself and/or compared to a specified Reference Channel. To measure RF Power: Tap the Measurement button. 2. Select a signal standard. 3. Tap Select Measurement. 4.
Page 176 Taking Measurements 6. Select a channel: a. Tap the Channel box. This assigns the knob and numeric keypad to Channel. b. Tap the numeric keypad to enter the channel number directly or use the knob to change the channel number. The vertical bars in the display represent the upper and lower frequency limits of the specified channel.
Page 177: Multiple Channel Rf Power Measurements (Option Cr1)
Taking Measurements When GSM is the selected signal standard for RF Channel Power measurements, the YBT250 attempts to locate and measure an RF power burst during the active burst. If no burst is found, the measurement defaults to a continuous power measurement on the selected channel, and displays a dialog box stating that no RF burst was found.
Page 178: Measuring Gsm/Edge Rf Power
Taking Measurements Measuring GSM/EDGE RF Power Requires option EM1 The GSM/EDGE RF Power measurement measures the average RF power transmitted during the useful part of a GSM time slot. The measurement can, at your option, use a specified BCCH channel to acquire time slot frame sync, enabling identification and measurement of individual GSM frame time slots (0-7).
Page 179 Taking Measurements Select Forward Link. 6. Tap the Channel box and enter a valid channel number for the current standard. Table 3- - 14 describes the GSM/EDGE RF Power measurement fields. Table 3- 14: GSM/EDGE Power vs. Time fields Field Description BCCH The slot 0 signal source.
Page 180: Setting Gsm/Edge Bcch Frame Sync Modes
Taking Measurements Setting GSM/EDGE BCCH Frame Sync Modes To set the GSM/EDGE RF Channel Power BCCH Frame Sync mode: 1. Tap the Edit button. 2. Tap the Meter tab. 3. Select a GSM/EDGE signal standard from the list at the top of the window.
Page 181 Taking Measurements H On Specified Channel: Sets the YBT250 to frame sync on slot 0 of the specified channel. Tap the keypad icon to enter a channel number. H On Specified Frequency: Sets the YBT250 to frame sync on slot 0 of the specified frequency. Tap the keypad icon to enter a frequency value.
Page 182: Channel And Frequency Setting Interactions
Taking Measurements Channel and Frequency Setting Interactions When you enter a value in the On Specified Channel field, the value in On Specified Frequency updates to reflect the frequency associated with the channel number for the current measurement standard. When you enter a value in the On Specified Frequency field, the value in the On Specified Channel field also updates as follows: H If the specified frequency has an associated channel number for the current measurement standard, then the On Specified Channel...
Page 183 Taking Measurements 4. Select an RF Channel Power mode: H Absolute: displays all slot power measurement values as absolute, in dBm units. See Figure 3- - 37. H Relative (to BCCH slot 0): displays all slot power measure- ment values relative to the BCCH Slot 0 power measure- ments, in dB units.
Page 184: Measuring 1Xev-Do Rf Power
Taking Measurements Figure 3- 38: GSM/EDGE Relative RF Power measurement 5. Tap OK to accept the selections, close the Setup window, and return to the RF Power display. Tap Cancel to close the Setup window without taking any action. Measuring 1xEV-DO RF Power Requires option CRE You can measure the RF Power of a 1xEV-DO signal within a selected forward channel.
Page 185 Taking Measurements To measure 1xEV-DO RF Power: Tap the Measurement button. 2. Tap Select Measurement..3. Select a 1xEV-DO standard. 4. Tap RF Power. Tap the Forward Link button. 6. Tap the Channel box and enter a valid channel number for the current standard.
Page 186: Setting 1Xev-Do Rf Power Averaging
Taking Measurements Table 3- 15: 1x-EVDO RF Power measurement fields (Cont.) Measurement Description Non-Idle Data Average power of data intervals of non-idle half slots Idle Data Average power of data intervals of idle half slots Activity Percentage of acquired half slots which are of the selected type (idle or non-idle) Setting 1xEV-DO RF Power Averaging This function lets you set the number of half slots over which to...
Page 187: 1Xev-Do Transmission Envelopes On The Rf Power Screen
Taking Measurements 4. Tap 100 Half-Slots or 512 Half-Slots to select the number of half slots over which to average RF power measurements. 5. Tap OK to accept the setting change. 1xEV-DO Transmission Envelopes on the RF Power Screen The YBT250 draws a waveform representing the averages of either the idle (not transmitting power in data interval) slots or the non-idle (transmitting power in data interval) slots.
Page 188: Measuring Td-Scdma Rf Power
Taking Measurements collected during the attempt, the instrument displays “* No non-idle (idle) half slots found *”. To speed up the measurement rate, switch to the other slot type by pressing the appropriate button (Idle or Non-Idle) at the bottom of the screen.
Page 189: Measuring Gsm/Edge Power Vs. Time
Taking Measurements 5. Tap the Channel box and enter a valid channel number for the current standard. Table 3- 16: TD-SCDMA RF Power measurement fields Measurement Description AutoLevel Adjusts the graph vertical scale to provide an optimized graph display. This does not change any instrument settings.
Page 190 Taking Measurements To measure GSM/EDGE Power vs. Time: Tap the Measurement button. 2. Tap Select Measurement..3. Select a GSM/EDGE Signal Standard. 4. Tap Power vs. Time. See Figure 3- - 42. Tap the Forward Link button. 6. Tap the Channel or Frequency box and enter a valid channel or frequency value.
Page 191 Taking Measurements Table 3- - 17 describes the GSM/EDGE Power vs. Time measurement fields. Table 3- 17: GSM/EDGE Power vs. Time fields Field Description BCCH The slot 0 signal source. Valid signal sources are None, On Meas Chan/Freq, On Channel xxx, and On Freq xx.xxx, where xxx and xx.xxx are the numeric values for a channel or frequency, respectively.
Page 192: Setting Gsm/Edge Power Vs. Time Parameters
Taking Measurements Figure 3- 43: GSM/EDGE Power vs. Time mask fail example NOTE. To search for the modulation type in all slots, instead of only the specified slot, set the BCCH Frame Sync control to Off. Setting GSM/EDGE Power vs. Time parameters To set the GSM/EDGE Power vs.
Page 193: Measuring Peak To Average Power Ratio
Taking Measurements H Limit mask test to the current slot: Enables use of a truncated version of the mask (the horizontal portions are omitted from the beginning and ending of the mask) to allow signals that contain active slots adjacent to the slot being tested to pass the mask test.
Page 194: Measuring Carrier Frequency
(see page 2- - 25 for a list of acceptable frequencies) to the FREQUENCY REFERENCE INPUT connector of the YBT250. You can also use a Tektronix YBGPS1 GPS Timing Reference to improve carrier frequency measurement accuracy. To measure the carrier frequency: Tap the Measurement button.
Page 195 Taking Measurements 4. Tap Carrier Frequency. See Figure 3- - 45. Tap the Forward Link button. 6. Select a channel. Figure 3- 45: A Carrier Frequency display The Carrier Frequency is the actual measured frequency for the selected channel. If the measurement frequency is not within the selected channel (indicated by a black background in the Channel box), a warning is displayed.
Page 196: Measuring Occupied Bandwidth
Taking Measurements If a valid external reference frequency (see page 2- - 25) or YBGPS1 GPS Timing Reference is connected, the instrument displays the frequency (or timing pulse rate for the YBGPS1 Timing Reference) of the external reference at the bottom of the screen. If the instrument is using the internal timing reference signal, then the external reference readout shows --- (dashes).
Page 197 Taking Measurements 3. Tap Occupied Bandwidth. See Figure 3- - 46. Figure 3- 46: A typical Occupied Bandwidth display 4. Select a signal standard. Tap the Forward Link button (note: not available for TD-SCDMA signals). 6. Select a channel. The vertical bars in the display represent the upper and lower limits of the specified channel.
Page 198: Td-Scdma Occupied Bandwidth Measurements (Option Tr1)
2. If available, connect the BTS Even Second Clock to the TIMING INPUT connector on the YBT250. Alternatively, you can use the Tektronix YBGPS1 GPS Timing Reference to provide a CDMA measurement timing reference. See GPS Overview on page 2- - 51 for more information.
Page 199 Taking Measurements Figure 3- 47: A Signal Quality display 6. Select the Method to use for measuring Signal Quality: H Select Pilot only, no other codes active on input signal for Pilot-only signals. H Select Auto detect active codes for an in-service signal quality measurement.
Page 200: Ota Signal Quality Icon
Taking Measurements OTA Signal Quality Icon When over the air (OTA) measurements are enabled, the OTA Signal Quality icon provides a way to easily monitor the quality of the received signal to optimize cdma2000 or 1xEV-DO OTA measure- ment accuracy. The most accurate OTA measurements are made when the Pilot Dominance (PD) value is high and Multipath Power (MP) value is low (indicated by green indicators on the icon) for the selected...
Page 201 Taking Measurements Tap the Forward Link button. 6. Select a channel. Figure 3- 48: A W-CDMA Signal Quality display (option WD2) Tap the online help link to display more information about a measurement. The EVM measurement is most accurate when using the confor- mance test model for EVM, Test Model 4.
Page 202: Transmit Diversity
Taking Measurements The EVM measurement is an average of the last ten data points. When you change a setting, the queue of the last ten data points is flushed. While the queue is filling, the help link text includes “**” and the message “**EVM result being averaged - please wait”...
Page 203 Taking Measurements You must have an appropriate Timing Reference input (Even Second Clock from a BTS, or the Timing signal from a NetTek YBGPS1 GPS Timing Reference) to measure PNOS and Tau. To measure signal quality: 1. Select a 1xEV-DO Signal Standard. Tap the Measurement button.
Page 204 Taking Measurements Table 3- - 18 describes the 1xEV-DO Signal Quality measurements. Table 3- 18: 1xEV-DO Signal Quality measurement fields Field Description Rho Pilot Rho Pilot is computed only on the pilot interval of 20 half slots. Since pilot is always transmitted, these results are available on every measurement attempt.
Page 205: Measuring Gsm/Edge Signal Quality
Taking Measurements Table 3- 18: 1xEV-DO Signal Quality measurement fields (Cont.) Field Description Timing Error The difference between an ideal signal with PN timing exactly aligned to a PN Offset location, and the received signal as observed at the module RF input port.
Page 206 Taking Measurements Figure 3- 50: GSM/EDGE Signal Quality measurement 7. Tap the Slot field and select a slot number to measure. Or select Any to display the first detected slot using the specified modulation type. 8. Tap the Modulation field to select the modulation type to detect (8-PSK or GSMK).
Page 207 Taking Measurements Table 3- 19: GSM/EDGE Signal Quality measurement fields Field Description Phase Error The RMS value of the differences (in degrees) between the phase angles of the received signal and those of an ideal reconstructed reference signal of the specified slot.
Page 208: Setting Cdma2000 Or 1Xev-Do Pn Offset
Taking Measurements Setting cdma2000 or 1xEV-DO PN Offset To set the PN offset to use for cdma2000 or 1xEV-DO signal detection and measurements: 1. Tap the Edit button. 2. Tap the Meter tab. Figure 3- - 51 shows a cdma2000 partial Meter tab with the PN Offset area marked.
Page 209: Measuring 1Xev-Do Code Power
Taking Measurements Measuring 1xEV-DO Code Power Requires Option CDE The Code Domain Power measurement for 1xEV-DO displays a graph showing the power in each of the 64 MAC code channels, relative to the total power of the signal. The display shows the MAC index number in the horizontal axis, and the power of each code channel level by the height of the corresponding bar.
Page 210 Taking Measurements Figure 3- 52: 1xEV-DO Code Domain Power display Table 3- - 20 describes the 1xEV-DO Code Domain measurements. Table 3- 20: 1xEV-DO Code Domain measurement fields Field Description PN Offset The coarse timing difference between the pilot channel and the Even Second Clock. MAC Index The MAC index number of the selected code.
Page 211: Measuring Cdma2000 Code Power
Taking Measurements NOTE. To display the power for a specific code, you may find it easier to tap the Code box and select a code by using the knob rather than tapping the graph. Measuring cdma2000 Code Power Requires Option CD2 The cdma2000 Code Power measurement displays signal and code power measurements in numerical and graphical formats.
Page 212 Taking Measurements Figure 3- 53: cdma2000 Code Power display 6. To select which marker to measure, do either of the following: H Tap the entry field next to the Marker readout. Then use the knob or the numeric keypad to enter a marker number. H Tap the graph to assign the knob or the numeric keypad to enter a marker number.
Page 213 Taking Measurements Table 3- 21: cdma2000 Code Domain measurement fields (Cont.) Field Description QPCH-to-Pilot Power The peak Quick Page Channel Power minus the Pilot Power. Marker The bit-reversed index for the value on the graph. Code Index The Walsh Code which corresponds to the value of the bit-reversed index on the graph.
Page 214: Measuring Cdmaone Code Power
Taking Measurements Measuring cdmaOne Code Power Requires Option CD1 The cdmaOne Code Domain Power displays a graph showing the power in each of the 64 code channels, relative to the total power of the signal. The display shows the code index number in the horizontal axis, and the power of each code channel level by the height of the corresponding bar.
Page 215 Taking Measurements Figure 3- 54: cdmaOne Code Power display Table 3- - 23 describes the cdmaOne Code Power measurements. Table 3- 23: cdmaOne Code Power measurement fields Field Description PN Offset The coarse timing difference between the pilot channel and the even second clock. Code The selected code to measure.
Page 216: Measuring W-Cdma Code Power
Taking Measurements Measuring W-CDMA Code Power Requires Option WD1 The W-CDMA Code Power displays graphs that indicate the power on each Orthogonal Variable Spreading Factor (OVSF) code in the signal. The bottom graph shows the Code Domain Power in all OVSF codes;...
Page 217 Taking Measurements Figure 3- 55: W-CDMA Code Power display 6. To select which Marker to measure, do one of the following: H Tap the graph at the marker to measure. H Tap the entry field next to the Marker readout. Then use the knob or the numeric keypad to enter a marker.
Page 218 Taking Measurements Table 3- 24: W-CDMA Code Power measurement fields (Cont.) Field Description Power The measured power for the selected code based on the detected spreading factor, with 0.1 dB resolution. Scrambling Code The detected primary scrambling code number or the specified manual scrambling code.
Page 219: Setting The W-Cdma Scrambling Code Detection
Taking Measurements Setting the W-CDMA Scrambling Code Detection The YBT250 enables you to specify how it detects the scrambling code of a W-CDMA signal for demodulated measurements. There are two settings for the scrambling code control: Auto and Manual. The default setting is Auto. Changing the Scrambling Code Setting To change the scrambling code setting: 1.
Page 220: How The Scrambling Code Setting Is Indicated In Displays
Taking Measurements The acceptable range for codes is 0-511. The Manual setting is primarily used in off-air testing in areas where there are multiple transmitters and there is a need to make measure- ments on a specific transmitter. 5. Tap OK to accept the setting change. NOTE.
Page 221 Taking Measurements 3. Tap Select Measurement..4. Select a channel. 5. Tap Codogram. See Figure 3- - 57. Figure 3- 57: cdmaOne Codogram display Hints Tap the Restart icon to clear the trace history and restart collecting data. H Select Updates... to change how often the codogram is updated. H To find the timestamp (displayed next to the Data Record box) for a specific data record in the Codogram, tap the Data Record box.
Page 222: Displaying A Cdma2000 Codogram
Taking Measurements Displaying a cdma2000 Codogram Requires Option CD2 A Codogram displays how code levels change over time. The Codogram makes it easier to spot faults and interference. For cdma2000 standards, the YBT250 displays data by bit-reversed code. To display a cdma2000 Codogram: Tap the Measurement button.
Page 223: Cdma2000 Codogram Results Export File Format
Taking Measurements Hints Tap the Restart icon to clear the trace history and restart collecting data. H Select Updates... to change how often the codogram is updated. H To find the timestamp (displayed next to the Data Record box) for a specific data record in the Codogram, tap the Data Record box.
Page 224: Displaying A W-Cdma Codogram
Taking Measurements Block 3 (rows 285-412) lists the parent code Spreading Factor indicators in bit reverse order, corresponding to the information in Block 2. The same SF number is repeated 128/SF consecutive times for each code of detected Spreading Factor SF. Displaying a W-CDMA Codogram Requires Option WD1 The Codogram display shows changes in code power levels over...
Page 225 Taking Measurements Figure 3- 59: W-CDMA Codogram display Hints Tap the Restart icon to clear the trace history and restart collecting data. H Select Updates... to change how often the codogram is updated. H You can save a codogram to a file every 80 records, by setting the option on the Meter tab of the Setup window.
Page 226: Displaying A 1Xev-Do Codogram
Taking Measurements Displaying a 1xEV-DO Codogram Requires Option CDE A codogram displays changes in code levels over time, making it easier to spot and record intermittent faults and interference. For 1xEV-DO signals, the YBT250 displays a codogram of the MAC channel codes.
Page 227: Setting The Codogram Update Rate
Taking Measurements Hints Tap the Restart icon to clear the trace history and restart collecting data. H Select Updates... to change how often the codogram is updated. H To find the timestamp (displayed next to the Data Record box) for a specific data record in the codogram, tap the Data Record box.
Page 228: Changing Settings For Saved Files 2
Taking Measurements 3. See Setting the Spectrogram Update Rate on page 3- - 23 for descriptions of the parameters. Note that you cannot manually set the time units for codogram collection times; the instrument automatically sets the collection time units. 4.
Page 229: Measuring Cdmaone And Cdma2000 Pilot Power
Taking Measurements Printing Trace Screens Although the Outdoor Viewing or Indoor Viewing color schemes are well suited for viewing a trace screen on a color display, if you want to print a trace screen on a black and white printer (for example, a laser printer), you should select either the Monochrome grays or Black on White for printer color scheme (Tools >...
Page 230: Measuring W-Cdma Pilot Power And Sync Power
Taking Measurements Figure 3- 62: A typical cdmaOne/cdma2000 Pilot Power display Measuring W-CDMA Pilot Power and Sync Power Pilot power is the power in the P-CPICH channel. Sync power is power in the P-SCH and S-SCH channels. To measure Pilot Power and Sync Powers: Tap the Measurement button.
Page 231 Taking Measurements Option WD1 Measurements Figure 3- - 63 shows the Pilot Power measurements available with option WD1. Tap the online help link to display more information about a measurement. Figure 3- 63: A typical W-CDMA Pilot Power display (option WD1) Option WD2 Measurements Figure 3- - 64 shows the Pilot Power measurements available with option WD2.
Page 232: Measuring W-Cdma Adjacent Channel Leakage Ratio (Aclr)
Taking Measurements Figure 3- 64: A typical W-CDMA Pilot Power display (option WD2) Measuring W-CDMA Adjacent Channel Leakage Ratio (ACLR) Requires Option WR1 Adjacent Channel Leakage Ratio (ACLR) is the ratio of the mean signal power in the assigned channel (5 MHz bandwidth) to the mean power in an adjacent channel of equal bandwidth.
Page 233 Taking Measurements To measure ACLR: Tap the Measurement button. 2. Select a W-CDMA signal standard. 3. Tap Select Measurement. 4. Tap ACLR. See Figure 3- - 65. Figure 3- 65: A typical ACLR display Four adjacent channels, the two closest on either side of the assigned channel, are measured: the Upper1/Lower1 adjacent channels are centered 5 MHz above and below the assigned channel center, and the Upper2/ Lower2 channels are 10 MHz above and below the...
Page 234: Measuring Cdmaone, Cdma2000, Or 1Xev-Do Adjacent Channel Power Ratio (Acpr)
Taking Measurements Measuring cdmaOne, cdma2000, or 1xEV-DO Adjacent Channel Power Ratio (ACPR) Requires Option CR1 The Adjacent Channel Power Ratio (ACPR) measures the relative amount of CDMA signal power leaking into nearby narrowband channels. ACPR is the ratio of the mean power in the selected channel (1.23 MHz bandwidth) to the mean power detected in an adjacent channel of 30 kHz bandwidth.
Page 235: Cdma2000 Or 1Xev-Do Over-The-Air (Ota) Measurements
Taking Measurements Figure 3- 66: A typical Adjacent Channel Power Ratio display The 30 kHz adjacent channels are centered at frequency offsets above and below the selected center channel. The frequency offset values in use are shown on the display, and depend on the band class of the selected standard: H Band class 0, 2, 3, 5, 7, 9, 10;...
Page 236 Taking Measurements NOTE. The YBGPS1 GPS Timing Reference must be connected and active before taking OTA measurements. To take OTA measurements: 1. Connect the antenna and filter (if used) to the YBT250 RF input. 2. Select a cdma2000 or 1xEV-DO signal standard. 3.
Page 237: Pilot Dominance And Multipath Power
Taking Measurements Watch the OTA Signal Quality icon, changing your position if required, until both indicators show green. It may be necessary to walk or drive around the measurement site until both indicators are green. 11. When both indicators are green, take the cdma2000 or 1xEV-DO OTA measurements.
Page 238: Multiple Measurements Sequencer
Taking Measurements below 0.1 dB is desirable, although measurements can be made above this level. MP values above 0.4 dB indicate that the signal quality is not adequate for accurate OTA measurements. When making cdma2000 or 1xEV-DO OTA measurements, the goal is to find a location that provides both high PD values and low MP values.
Page 239 Taking Measurements Any out-of-limit conditions are indicated by a red block with an up or down arrow. Messages may appear in the gray bar indicating any abnormal conditions. You can save different sets of selected measurements for each standard and then recall these sequences later for reuse. To save a measurement sequence, tap Setup >...
Page 240: Limit Testing
Taking Measurements 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 you export a screen, a picture of only what shows on the screen will be exported.
Page 241 Taking Measurements Figure 3- 69: Enabling limit testing 5. Tap (highlight) the limit you want to change in the Low Limit or High Limit column. 6. Tap the numeric keypad to enter a new value for the selected limit. Tap OK to complete the change. To test just one limit (High or Low), clear (delete) the contents of the limit that you do not want to test by selecting that limit and using the keypad backspace key.
Page 242 Taking Measurements b. Tap the check box for Pause to cause the YBT250 to pause and display a message box when a limit is exceeded. c. Tap the check box for Export Screen to cause the YBT250 to export the screen display when a limit is exceeded.
Page 243: Saving, Exporting, And Recalling Results, Traces, And Settings
Saving, Exporting, and Recalling Results, Traces, and Settings The YBT250 Field Transmitter & Interference Tester can save measurement results and trace displays for later recall or for transfer to a PC. You can also set up the YBT250 for specific tests and save the setup to a file for later recall, saving you time when making measurements in the field.
Page 244: Saving Measurement Results
Saving, Exporting, and Recalling Results, Traces and Settings NOTE. You should use an optional PCMCIA memory card if you plan to save a lot of measurement data to memory (test measurement results, signal traces, auto saved spectrogram or codogram results, and so on).
Page 245: What Is Saved In A Measurement Results File
Saving, Exporting, and Recalling Results, Traces and Settings What is Saved in a Measurement Results File The following information is saved in the results file for each included measurement: H Name of the measurement H Measurement results and units H Pass/fail status of the measurement (if limit testing is enabled) H Time and date of the measurement Additional information saved in a results file includes: H Technician name...
Page 246 Saving, Exporting, and Recalling Results, Traces and Settings Saved Data icon indicates recalled results are displayed To restart acquisition, Date and time result tap the Run button was saved Figure 3- 70: Example of a Recalled Result display When a recalled measurements file is displayed, the Saved Data icon is displayed at the top of the screen, next to the time and date the file was saved.
Page 247: Exporting Measurement Results
Saving, Exporting, and Recalling Results, Traces and Settings Exporting Measurement Results The YBT250 can save measurement results in a file for use in other applications, such as Microsoft Excel. The YBT250 exports files as tab-separated or comma-separated files. Files that use tabs to separate data fields are saved with a “txt”...
Page 248: Exporting A Screen
Saving, Exporting, and Recalling Results, Traces and Settings RF Channel Power: 0.000049200 W Ref Channel Power: - -13.3 Difference: Message Figure 3- 72: Sample Exported Results file NOTE. The Technician name and User notes are entered from the Save & Export page of the Setup dialog box; see page 2- - 45. Exporting a Screen The YBT250 can export an image of the screen for use in other programs such as Microsoft Word.
Page 249: Saving A Trace
Saving, Exporting, and Recalling Results, Traces and Settings Saving a Trace A saved trace contains an array of numbers that represent a displayed spectral graph. Saved traces are useful for sending to someone through email, recalling for later display, or printing a hard copy at a later time.
Page 250: Exporting A Trace
Saving, Exporting, and Recalling Results, Traces and Settings Saved Data icon indicates saved results are displayed Date and time trace was saved Figure 3- 73: Example of a Recalled Trace display Exporting a Trace An exported trace is a text file that contains an array of numbers that represent a displayed trace.
Page 251: Differences Between Exported Screens And Traces
Saving, Exporting, and Recalling Results, Traces and Settings 3. Select the Type of file format, either tab-separated or comma- separated. 4. Choose the location where the file should be saved (the default is \BuiltInDisk\YBT250\AppData\Results). 5. Tap OK to save the trace. Differences Between Exported Screens and Traces Though an exported screen and an exported trace or results file might seem as though they are the same thing, they are significantly...
Page 252 Saving, Exporting, and Recalling Results, Traces and Settings BMP is an uncompressed format and uses a lot of space, but maintains sharp images. JPEG is a compressed format and uses far less space than BMP, but can blur lines and text. PNG is a com- pressed format and maintains sharp lines and text.
Page 253 Saving, Exporting, and Recalling Results, Traces and Settings Name Value Units Pass/Fail Screen Name Spectrum Signal Standard CDMA US Cellular Timestamp 8/6/02 12:41:13 PM Channel Channel Forward/Reverse Forward Frequency (Hz) 870030000 Technician Aeryn Sun Notes for saved results Freq Ref Internal External Reference Frequency: - -- -- -- -- -...
Page 254: Saving Setups
Saving, Exporting, and Recalling Results, Traces and Settings Saving Setups The YBT250 can save its settings in Setup files for later recall. Recalling a saved setup changes the YBT250 settings to match those in the saved setup. Using saved setups minimizes your setup time in the field and helps to ensure more consistent measurement results.
Page 255: Recalling Setups
Saving, Exporting, and Recalling Results, Traces and Settings Recalling Setups Recalling a saved setup changes the YBT250 settings to match those in the saved setup file. To recall setups: 1. To recall a setup, select Setup > Open... 2. Locate the directory that contains the setup file (the default is \BuiltInDisk\YBT250\AppData\Settings).
Page 256 Saving, Exporting, and Recalling Results, Traces and Settings Figure 3- 75: Protecting Setup Controls 3. To prevent a user from changing saved setups, select Hide Setup controls. 4. Tap OK to save the Setup Menu changes. When Hide Setup controls is selected, tapping the Edit button displays the Open dialog box instead of the Setup window.
Page 257: Enabling Changes To Saved Setups
Saving, Exporting, and Recalling Results, Traces and Settings Enabling Changes to Saved Setups If setup controls have been hidden, you cannot create new setup files. You must show setup controls so you can create new setup files. To show setup controls: 1.
Page 258 Saving, Exporting, and Recalling Results, Traces and Settings Figure 3- 76: Specifying the List of Setups 4. To display the 10 most recently used saved setups in the Setup menu, select 10 most-recently used saved Setups. 5. To display only a selected list of saved setups, select Custom List.
Page 259: Appendices
Appendices...
Page 261: Appendix A: Specifications
Appendix A: Specifications This section lists the electrical, environmental, and physical specifications of the YBT250 Field Transmitter & Interference Tester. All specifications are guaranteed unless labeled “typical”. Typical specifications are provided for your convenience and are not guaranteed. The specifications in this section apply to the YBT250 module, unless otherwise specified.
Page 262 Appendix A: Specifications Table A- 1: General characteristics (Cont.) RF input characteristics Description ≥ 15 V (DC + peak AC) Working Voltage Spurious Input Signals To meet modulation measurement specifications: (Total power of interest -- Total power in spurious) > 35 dB (Center frequency of signal of interest -- center frequency of spurious signal) >...
Page 263 Appendix A: Specifications Table A- 1: General characteristics (Cont.) Timing Input Characteristics Description Maximum Low Threshold 0.8 V Minimum High Time 10 ns Minimum Low Time 10 ns ± 5 V peak continuous Maximum Input Level without Damage Coupling ± 10 ppm Frequency Lock Range Internal Time Base Characteristics...
Page 264 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement 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 channel center frequency instead of channel number.
Page 265 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description 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.
Page 266 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description ± (10 Hz + Time Base Error), 99% confidence interval Accuracy W-CDMA: ± (12 Hz + Time Base Error), 99% confidence interval Note: Carrier frequency must be within 10 kHz of expected value, except: W-CDMA, 1xEV-DO, and GSM/EDGE: within 5 kHz IS-136: within 1.5 kHz...
Page 267 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description Resolution 1 PN Index Each PN Index is 64 chips Accuracy Displayed PN Index must match PN Offset of CDMA signal. Pilot Time Alignment Error (Tau) Measures the time offset between the PN sequence of the input signal and the External Even Second Clock (on Timing Input connector).
Page 268 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description 1xEV-DO Waveform Quality Rho (ρ) for 1xEV-DO signals provides an indication of (Rho Pilot, Rho MAC, Rho the signal to distortion ratio for the transmitted signal. Data) This quality measure is an indication of how similar the transmitted signal is to a perfect signal.
Page 269 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description Error Vector Magnitude (EVM) The normalized RMS of all of the vectors that extend (cdmaOne & cdma2000) from the intended constellation points to the actual symbol points in a record of symbols. Resolution 0.01% Accuracy...
Page 270 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description Reference Information: The EVM16QAM measurement readout displays the symbol EVM for the code channels using 16QAM modulation. Code Domain Power Measures the power in each of the Walsh codes (64 in (cdmaOne, cdma2000, cdmaOne, 128 in cdma2000) used in a CDMA signal.
Page 271 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description Resolution 0.1 dBm 1xEV-DO Code Domain Power Measures the power in each code in the MAC interval. The data code domain power measurement gives an indication of the overall minimum and maximum power for codes in the data interval of active slots.
Page 272 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description Pilot Power Measures the absolute power of the pilot. It is made without regard to whether other codes are present. (P-CPICH for W-CDMA.) Units dBm, Watts (W) Resolution 0.1 dB ±...
Page 273 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description Adjacent Channel Leakage Measures the ratios of the mean RRC filtered power in power Ratio (ACLR) the 5 MHz BW assigned channel to the mean RRC (W-CDMA) filtered power in each of the nearest 5 MHz BW 1st and 2nd adjacent upper and lower channels.
Page 274 Appendix A: Specifications Table A- 2: Measurement characteristics (Cont.) Measurement Description GSM/EDGE Origin Offset 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.
Page 275 Appendix A: Specifications Table A- 3: Spectral analysis characteristics Characteristic Description Measurement Frequency Sets the measurement frequency of the display. The measurement frequency can be set by either entering a specific frequency or by selecting a channel number. Units MegaHertz (MHz) Channel Number Resolution 1 kHz...
Page 276 Appendix A: Specifications Table A- 3: Spectral analysis characteristics (Cont.) Characteristic Description Reference Level The power level indicated by the top line of the spectral display Units Resolution 1 dB Range --100 dBm to +30 dBm Spectral Display Amplitude Units dB relative to Reference Level Resolution 0.1 dB...
Page 277 Appendix A: Specifications Table A- 3: Spectral analysis characteristics (Cont.) Characteristic Description The amplitude accuracy for Noise-like signals is degraded when averaging is turned on. This is approximately a 2.5 dB degradation due to the averaging being done after the logging instead of before.
Page 278 Appendix A: Specifications Table A- 3: Spectral analysis characteristics (Cont.) Characteristic Description Spurious Free Dynamic > 70 dB, except 2 harmonic > 60 dB typical Range (external signal related) 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...
Page 279 Appendix A: Specifications Table A- 4: Interference analysis characteristics (Cont.) Characteristic Description Noise Floor Measurement Measures the interference power that is coming into the receiver antenna for any standard. Measure- ment defaults to uplink channel when specified by channel number. Units Resolution 0.1 dB...
Page 280 Appendix A: Specifications Table A- 4: Interference analysis characteristics (Cont.) Characteristic Description Tone Type Variable Beep Rate, based on signal strength Variable Frequency, based on signal strength RF Field Strength (EMF) Measures the absolute electromagnetic power of a signal at a particular frequency and bandwidth as it strikes an antenna.
Page 281 Appendix A: Specifications Table A- 5: Scanner characteristics Characteristic Description W--CDMA Scrambling Code Detects scrambling codes and pilot channel power Analyzer levels of received co-channel W-CDMA downlink signals Input Signal Range --117 to +30 dBm, typical Units Io, Ec: dBm Ec/Io: dB Resolution 0.1 dB...
Page 282 Appendix A: Specifications Table A- 5: Scanner characteristics (Cont.) Characteristic Description Ec: ±2 dB for Ec ≥ --95 dBm and Accuracy 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.
Page 283 Appendix A: Specifications Table A- 5: Scanner characteristics (Cont.) Characteristic Description Display Controls Sort by Power (descending Ec value) Sort by PN offset (ascending offset values) Lock (set) current PN Offset values GSM Channel Scanner The GSM channel scanner displays channel power and related information on a maximum of 128 GSM forward link signals.
Page 284 Appendix A: Specifications Table A- 6: Environmental characteristics Characteristic Description Temperature Range 0 _C to +50 _C specified performance, Operating --10 _C to +50 _C typical --40 _C to +60 _C Nonoperating Humidity Operating 5% to 95% Relative Humidity (RH), noncondensing: up to +30 _C 5% to 45% Relative Humidity (RH), noncondensing: +30 _C up to +50 _C...
Page 285 Appendix A: Specifications Table A- 8: Miscellaneous characteristics Characteristic Description Battery Life One battery installed 2 hours with measurements active 4 hours in suspend mode Two batteries installed 4 hours with measurements active 8 hours in suspend mode Recommended Calibration Interval 2 years Table A- 9: Safety compliance Category...
Page 286 Appendix A: Specifications Table A- 10: Electromagnetic compatibility (EMC) Category Standards or description EC Declaration of Meets the intent of Directive 89/336/EEC for Electromagnetic Conformity -- EMC Compatibility. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Union: EN 61326 Annex D, EMC requirements for Class A...
Page 287: Appendix B: Accessories
Appendix B: Accessories This section lists the YBT250 Field Transmitter & Interference Tester standard and optional accessories. Standard Accessories Table B- - 1 lists the accessories that come standard with your YBT250 Field Transmitter & Interference Tester. Table B- 1: Standard accessories Quantity Part number Description...
Page 288: Optional Accessories
Appendix B: Accessories Optional Accessories Table B- - 2 lists optional accessories for your NetTek YBT250 Field Transmitter & Interference Tester. Contact your Tektronix represen- tative or distributor for ordering information. Table B- 2: Optional accessories Part number Description YBGPS1 YBGPS1 GPS Timing Reference receiver.
Page 289 Sniffer Antenna 174-3578-00 SMB Female to BNC Male 200-4727-00 BNC Connector Cap 200-4728-00 N Connector Cap For the most current list of accessories, please see the Tektronix Web site: www.tektronix.com. YBT250 Field Transmitter & Interference Tester User Manual B- 3...
Page 290 Appendix B: Accessories YBT250 Field Transmitter & Interference Tester User Manual B- 4...
Page 291: Appendix C: Measurement Options
YBT250. You can order any combination of options. You can add a measurement option to your YBT250 without returning it to Tektronix. For information on installing a measure- ment option on your YBT250, see Appendix D.
Page 292 Appendix C: Measurement Options Table C- 1: Measurement options (Cont.) Option Description Add RF measurements for IS-136 standards Adds RF Power and Occupied Bandwidth measurements for TD-SCDMA standards Add demodulation measurements for W-CDMA standards Add HSDPA measurements for W-CDMA standards Add RF measurements for W-CDMA standards Adds analysis of W-CDMA scrambling code, including a scrambling code display and Ec/Io and Ec data...
Page 293: Appendix D: Installing Options And Upgrading
You can install the measurement options listed in Table C- - 1 without returning the YBT250 to Tektronix. First, you will need to purchase a new Options key from Tektronix. To purchase a new Options key you will need to provide the serial number and Global ID for your YBT250 module (not the NetTek Analyzer Platform).
Page 294: Software
Appendix D: Installing Options and Upgrading Software To reinstall the original application software or install a free upgrade on the YBT250, you will need the current Options key for your YBT250. To display the YBT250’s current Options key, select Tools > Software info from the YBT250 application menu bar. The Options key is displayed near the bottom of the scrolling window.
Page 295 Appendix D: Installing Options and Upgrading Software Figure D- 2: This dialog displays information about software upgrades b. To see more information about either the available upgrades or the installed upgrades, select the upgrade from the appropriate box and then select Description. c.
Page 296 Appendix D: Installing Options and Upgrading Software 4. Select Install with only a key and then select Next > to continue with the upgrade. 5. Enter the Options key into the dialog box as shown in Figure D- - 4. To display the soft keyboard, tap the keyboard button to the right of the text entry box.
Page 297: Upgrading/Reinstalling The Ybt250 Software
Upgrading/Reinstalling the YBT250 Software On-screen installation instructions will guide you through upgrading or reinstalling the YBT250 software: 1. Insert the YBT250 Installation SW CD-ROM (Tektronix part number, 063-3476-XX) into your PC and follow the on-screen instructions that appear. 2. If no instructions appear after you insert the CD-ROM, use Windows Explorer to display the contents of the CD-ROM and double-click the setup.exe file to begin the installation.
Page 298 Appendix D: Installing Options and Upgrading Software YBT250 Field Transmitter & Interference Tester User Manual D- 6...
Page 299: Appendix E: Functional Verification Procedure
To run the internal diagnostics self-tests: 1. Power up the NetTek Analyzer Platform. 2. Press File>Exit to quit the YBT250 application, if it is running. 3. Press Start>Programs>Tektronix Utilities>Diagnostics in the taskbar. YBT250 Field Transmitter & Interference Tester User Manual...
Page 300 NOTE. If you encounter any errors, you can tap the Failure Log tab to display more information. If the YBT250 fails any of its diagnostic tests, contact your local Tektronix service representative. YBT250 Field Transmitter & Interference Tester User Manual...
Page 301: Functional Tests
Functional Tests To perform the following tests, you must have an RF signal source. Equipment Required H One 50 Ω BNC cable, such as Tektronix part number 012-0057-01 H One BNC-female to N-male connector adapter, such as Tektronix part number 103-0045-00...
Page 302 Appendix E: Functional Verification Procedure 6. Connect the BNC cable between the adapter on the RF INPUT connector and the signal generator output. 7. In the YBT250 application menubar, select Tools>Factory Reset. Tap Reset All in the pop-up dialog box. 8.
Page 303 8. Disconnect the Signal Generator output from the YBT250 Frequency Reference input. This completes the Incoming Inspection procedure. If any errors occured during this procedure, contact your local Tektronix service representative. YBT250 Field Transmitter & Interference Tester User Manual E- 5...
Page 304 Appendix E: Functional Verification Procedure YBT250 Field Transmitter & Interference Tester User Manual E- 6...
Page 305: Appendix F: Supported Signal Standards
Appendix F: Supported Signal Standards This appendix lists the signal standards that the YBT250 supports. Table F- 1: Cellular standards supported Standard Channel numbers AMPS / EIA 553 1--799 990--1023 C-450 (SA) 1--247 C-450 (P) 1--887 CDMAOne US Cellular 1--799 TIA/EIA-95 990--1023 TIA/EIA-97C...
Page 306 Appendix F: Supported Signal Standards Table F- 1: Cellular standards supported (Cont.) Standard Channel numbers CDMA2000 Class 1, N. A. PCS 0--1199 CDMA2000 Class 2 (TACS Band) 0--1000 1329--2047 CDMA2000 Class 3 (JTACS Band) 1--799 801--1039 1041--1199 1201--1600 CDMA2000 Class 4, Korea PCS 0--599 CDMA2000 Class 5, (NMT-450W 25 kHz) 1--300...
Page 307 Appendix F: Supported Signal Standards Table F- 1: Cellular standards supported (Cont.) Standard Channel numbers CDMA2000 1xEVDO Class 2 TACS Band 0--1000 1329--2047 CDMA2000 1xEVDO Class 3 JTACS Band 1--799 801--1039 1041--1199 1201--1600 CDMA2000 1xEVDO Class 4 Korea PCS 0--599 CDMA2000 1xEVDO Class 5 NMT--25k--450 1--300 539--871...
Page 308 Appendix F: Supported Signal Standards Table F- 1: Cellular standards supported (Cont.) Standard Channel numbers GSM-E/EDGE 900 0--124 975--1023 GSM-P/EDGE 900 1--124 GSM-R/EDGE 900 0--124 955--1023 GSM/EDGE 1800 512--885 GSM/EDGE 1900 512--810 JTACS 0--798 (even channels only) 800--1038 (even channels only) 1040--1198 (even channels only) MATS-E 1--1000...
Page 309 Appendix F: Supported Signal Standards Table F- 1: Cellular standards supported (Cont.) Standard Channel numbers TACS 1--1000 TD--SCDMA (Band A) 9504--9596 10054--10121 TD--SCDMA (Band B) 9254--9546 9654--9946 TD--SCDMA (Band C) 9554--9646 WCDMA Class 1 UMTS 9612--9888 10562--10838 WCDMA Class 2 NA-PCS 9262--9538 9662--9938 WCDMA Class 2 NA-Addl PCS...
Page 310 Appendix F: Supported Signal Standards YBT250 Field Transmitter & Interference Tester User Manual F- 6...
Page 311: Appendix G: Channel Table Definition File
Appendix G: Channel Table Definition File The default location of the standard Channel Table definition file is: \BuiltInDisk\NetTekApps\YBT250\SignalStandards.txt However, if the application is not loaded into the BuiltInDisk directory due to lack of space, you can also find the standard Channel Table file at: \NetTekApps\YBT250\SignalStandards.txt You can open this file as a text file (with Pocket Word);...
Page 312 Appendix G: Channel Table Definition File The signal types 998 and 999 are included in the Channel Table to enable you to create a custom signal standard for analog or digital signals that do not match the other signal types (such as an “FM” standard noted previously).
Page 313: Appendix H: Saved Measurement File Extensions
Appendix H: Saved Measurement File Extensions Table H- 1: Measurement data file extensions Measurement type File extension Spectrum .r01 Spectrogram .r02 Audio Demod .r14 Signal Strength .r15 Signal Identity .r16 Noise Floor .r17 Scrambling Code .r18 .r19 Scanner .r1b RF Power .r64 GSM RF Burst Power .r65...
Page 314 Appendix H: Saved Measurement File Extensions Table H- 1: Measurement data file extensions (Cont.) Measurement type File extension WCDMA ACLR .r71 GSM RF Power .r72 .r73 Signal Quality .r74 CDMA ACPR .r75 YBT250 Field Transmitter & Interference Tester User Manual H- 2...
Page 315: Glossary
Glossary...
Page 317 Glossary ACLR. Adjacent Channel Leakage power Ratio (ACLR) is the ratio of the RRC (Root Raised Cosine) filtered mean power centered on the assigned channel frequency to the RRC filtered mean power centered on an adjacent channel frequency. ACPR. Adjacent Channel Power Ratio (ACPR) is the ratio of the mean power in the selected channel (1.23 MHz bandwidth) to the mean power detected in an adjacent channel of 30 kHz bandwidth.
Page 318 Glossary Difference. Difference is the power difference between Channel Power and the Ref Power. Error Vector Magnitude (EVM). Error Vector Magnitude is the RMS value of all the vectors that extend from the ideal constellation points to the received signal constellation points in a record of demodulated CDMA symbols, divided by the RMS value of the signal.
Page 319 Glossary Measurement Frequency. The Measurement Frequency is the frequency at which measurements are made. The Measurement Frequency is always shown in the Frequency box. The Measurement Frequency is indicated in the spectrum displays by the frequency marker. Measured Frequency. The actual frequency measured for the selected channel.
Page 320 Glossary Pilot Power. The Pilot Power is the absolute power of the pilot channel (Walsh Code 0) in a CDMA channel. For W-CDMA, the Pilot Power is the absolute power of the Primary Common Pilot Channel (P-CPICH). The primary common pilot channel is used as a phase reference for many channels and to identify the primary scrambling code.
Page 321 Glossary Span. Sets the frequency range covered by the spectral display graph. The YBT250’s resolution bandwidth (RBW) is automatically adjusted based on the span setting. Waveform Quality (Rho). The Waveform Quality measurement is an indication of the quality of the transmitted signal. Rho can vary between 0.0 and 1.0, where 1.0 represents a perfect signal.
Page 322 Glossary YBT250 Field Transmitter & Interference Tester User Manual Glossary- 6...
Page 323 Index...
Page 325 Index Numbers Antenna factors, EMF, 3- - 65 examples, 3- - 67 1xEV- - DO files, 3- - 66 code power, 3- - 107 guidelines, 3- - 67 codogram, 3- - 124 Audible tone, 3- - 40 constellation type, 3- - 100 Auto saving and exporting, setting Error Vector Magnitude default location for files, 2- - 49...
Page 326 Index Buttons AutoLevel, 3- - 2 center measurement C/I (GSM/EDGE), frequency, 3- - 2 measuring, 3- - 103 command bar area, 2- - 10 Cable loss factors, EMF, 3- - 65 downlink, 2- - 11 examples, 3- - 67 Edit, 2- - 10 files, 3- - 66 external RF amplifier, 2- - 9 guidelines, 3- - 67...
Page 327 Index Sort by, 3- - 51 display update rate, 3- - 125 Tau (Chips), 3- - 52 displaying, 3- - 118 Total Power (Io), 3- - 52 1xEV- - DO, 3- - 124 cdmaOne cdma2000, 3- - 120 codogram, 3- - 118 W- - CDMA, 3- - 122 measuring printing, 3- - 127...
Page 328 Index Desktop Enabling tap/drag, 3- - 9 icons, 2- - 3, 2- - 5 Environmental overview, 2- - 3 specifications, A- - 26 Error marking in program button, 2- - 4 Spectrogram, 3- - 22 Start menu, 2- - 4 Error Vector Magnitude status area, 2- - 4 measuring, 3- - 96, 3- - 98...
Page 329 Index Filename extensions, measurement, overview, 2- - 51 supported, H- - 1 position accuracy, 2- - 56 Filename length, 2- - 46 receiver list, 2- - 54 Filename prefix, setting, 2- - 46 receiver requirements, 2- - 51 Files receiver select list, 2- - 52 antenna factor, 3- - 66 Satellites In Use field, 2- - 55 antenna factor format, 3- - 67...
Page 330 Index BCCH Frame Sync, 3- - 78 IN1, option, 3- - 35 Power vs Time graph units, 3- - 90 Incoming inspection, E- - 1 Relative RF power mode, 3- - 80 Information, getting help, 2- - 2 symbols, 3- - 90 Input connector, Timing Input, 2- - 25 Input connectors, 2- - 21, 2- - 22...
Page 331 Index M1 Trace 1, M2 Trace 2, 3- - 18 mask testing, 3- - 19 Length, filenames, 2- - 46 measuring frequency and Limit mask definition level, 3- - 18 (loading), 3- - 31 on two traces, 3- - 18 Limit testing, 3- - 138 readouts, 3- - 16 changing measurement...
Page 332 Index cdma2000 code power, 3- - 109 saving GPS data, 2- - 58 cdma2000 OTA, 3- - 133 saving results, 3- - 142 cdmaOne code power, 3- - 112 Scrambling Code, 3- - 98 constellation type, signal quality, 3- - 96, 3- - 98 1xEV- - DO, 3- - 100 1xEV- - DO, 3- - 100 EMF, 3- - 60...
Page 333 Index Occupied bandwidth, measuring, Page- - to- - Pilot Power, cdma2000 TD- - SCDMA, 3- - 96 code power readout, 3- - 110 Occupied bandwidth, Path for auto saving files, 2- - 49 measuring, 3- - 94 PCDE (Peak Code Domain Error), Off, 1- - 12 measuring, 3- - 98 On, 1- - 11...
Page 334 Index PN Scanner 1xEV- - DO, 3- - 50 cdma2000, 3- - 50 Readouts, markers, 3- - 16 Recalled data icon, 2- - 11 PN Scanner tab Recalling a trace, 3- - 147 (Opt CS1), 3- - 50 Recalling instrument setups, 3- - 153 (Opt ES1), 3- - 50 Recalling results, 3- - 143 Ports, input (Y400), 1- - 3...
Page 335 Index Rotate traces button, 3- - 11 measuring, 3- - 98 RS- - 232 port, 1- - 3 Scrambling Code Analyzer, (Opt RSCP scrambling code, (Opt WS1), 3- - 47 WS1), 3- - 48 setting, 3- - 117 RSSI scrambling code, sorting, 3- - 49 (Opt WS1), 3- - 48 W- - CDMA code power...
Page 336 Index trace type, 3- - 5 Spectrogram vertical scale, 3- - 7 Auto Save, 3- - 24 W- - CDMA scrambling displaying, 3- - 21 code, 3- - 117 update rate, 3- - 23 Setting up GPS, 2- - 52 Spectrogram cursor, 3- - 22 Setup Menu, customizing, 3- - 153 Spectrogram frequency span, 3- - 2...
Page 337 Index Trace 2 & Mask, 3- - 12 Turning on instrument, 1- - 11 Tap/drag action icon, 3- - 9 Type Taskbar, desktop, 2- - 3 cdma2000 code power readout, 3- - 111 TD- - SCDMA W- - CDMA code power occupied bandwidth measure- readout, 3- - 116 ment, 3- - 96...
Page 338 Index EVM16QAM, 3- - 98 W- - CDMA Scrambling Code Analyzer, 3- - 47 Peak Code Domain Error, 3- - 98 Pilot power, 3- - 128 Waveform Quality, measuring, 3- - 96 Scrambling Code, 3- - 98 Weight, A- - 24 signal quality, 3- - 98 Where to select standards, 2- - 8 Transmit diversity, 3- - 100...

Tektronix NetTek YBT250 User Manual

Getting Started

Calibratingthetouch-Screendisplay

Operating Basics

Reference

Thespectrumdisplayarea

Appendices

Appendix A: Specifications

Appendix B: Accessories

Standardaccessories

Appendix C: Measurement Options

Appendix D: Installing Options and Upgrading

Beforeinstallingoptions

Appendix E: Functional Verification Procedure

Appendix F: Supported Signal Standards

Appendix G: Channel Table Definition File

Appendix H: Saved Measurement File Extensions

Glossary

Quick Links

Need help?

Questions and answers

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Summary of Contents for Tektronix NetTek YBT250