Agilent Technologies E4438C Option H13 User’s Guide
Agilent Technologies E4438C Option H13 User’s Guide Manufacturing Part Number: E4400-90619 Printed in USA January 2005 © Copyright 2004, 2005 Agilent Technologies, Inc. All rights reserved.
Warranty Statement THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED “AS IS,” AND IS SUBJECT TO BEING CHANGED, WITHOUT NOTICE, IN FUTURE EDITIONS. FURTHER, TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, AGILENT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Safety Notes The following safety notes are used throughout this document. Familiarize yourself with each of these notes and its meaning before performing any of the procedures in this document. WARNING Warning denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in injury or loss of life. Do not proceed beyond a warning note until the indicated conditions are fully understood and met. CAUTION Caution denotes a hazard.
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Contents Signal Studio for WiMAX Software Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Summary of Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Data Type Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 User Bits Editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 OK and Cancel Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 DLFP Editor Pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Studio for WiMAX User’s Guide 1
Signal Studio for WiMAX Software Information E4438C Option H13 Software Information Product Overview Signal Studio for WiMAX is a software tool for creation of arbitrary waveform files for the E4438C ESG Signal Generator in compliance with the WirelessMAN-OFDM physical layer defined in the IEEE 802.16-2004 standard.
E4438C Option H13 Signal Studio for WiMAX Software Information Summary of Key Features • Select WiMAX signal parameters including bandwidth, cyclic prefix ratio (G), sampling factor (n) and frame length as allowed by the standard. • Configure downlink or uplink frames. • Each frame may contain a preamble, FCH with predefined data patterns or user file data and one or more data bursts, each with its own modulation type (BPSK, QPSK, 16QSM, or 64QAM).
Signal Studio for WiMAX About WiMAX E4438C Option H13 About WiMAX Introduction WiMAX is designed for point-to-point and point-to-multipoint systems to deliver high-speed data services. Applications include providing backhaul for wireless LAN hot-spots or cellular base stations, replacing T1 lines to enterprises and providing wireless DSL service to homes and businesses. Although the 802.16-2004 standard covers operation up to 11 GHz, the WiMAX Forum is focused on deployments in the 2.5 GHz, 3.
E4438C Option H13 Signal Studio for WiMAX About WiMAX The TTG (transmit/receive transition gap) and RTG (receive/transmit transition gap) are inserted at the end of each subframe and the end of each frame to allow the base station to change from transmit to receive mode. For frequency division duplex (FDD) mode, the downlink and uplink signals are transmitted simultaneously at different frequencies.
Signal Studio for WiMAX Using the Software E4438C Option H13 Using the Software Equipment Setup and Connection 1. Connect the ESG to a computer: Connect both the ESG and the computer to a LAN network using standard LAN cables, or Connect a crossover LAN or GPIB cable between the ESG and the computer. 2. Turn on the ESG and the computer. 3. Run the Signal Studio software and establish communication between the software and the ESG using the following steps. Figure 2 Instrument Setup Window a.
E4438C Option H13 Signal Studio for WiMAX Using the Software c. Click the State check box of each ESG connection you want to activate. NOTE The Signal Studio software automatically recalls previously entered IP addresses (or hostnames) for the Host Name or IP cell. If the ESG's dynamic host configuration protocol (DHCP) is enabled, you must change the IP address in this cell to reflect the new IP address the network may have reassigned to the ESG when it was last turned on.
Signal Studio for WiMAX Using the Software E4438C Option H13 Step 3: Configure the Signal Generator Settings a. Configure the ESG’s frequency, amplitude and arbitrary waveform playback parameters in the Signal Generator Settings pane as desired. Note that the amplitude refers to the average power level of the burst excluding the preamble. The preamble power level is defined in the standard to be 3 dB higher than the level of the rest of the burst. Step 4: Configure the Frame Structure a.
E4438C Option H13 Signal Studio for WiMAX Using the Software Step 5: Generate and Download the Waveform NOTE If the ESG is in a mode other than Dual ARB prior to downloading a waveform from Signal Studio, it can be helpful (but not necessary) to set the ESG to Dual ARB mode. This reduces confusion, as the ESG display remains in the last mode used prior to downloading the waveform file; it does not automatically switch to the Dual ARB mode. a. From the toolbar, click Generate.
Signal Studio for WiMAX User Interface Basics E4438C Option H13 User Interface Basics Working with Cells The software interface uses cells (similar to a spreadsheet) for configuring various parameters. Fields that can be changed will be in darker font, while items that are informational only and cannot be changed are in gray. Some cells have discrete settings (predefined choices), while others are arbitrary. For example; the Bandwidth (MHz) selection for the WiMAX signal uses discrete settings.
E4438C Option H13 Signal Studio for WiMAX User Interface Basics Main Window Layout Using the Tree View The left pane of the main window is called the tree view. It is useful for navigating between the various waveform configuration levels, ESG connectivity settings and quick setups. At a glance, you can determine the available parameters in the right pane, which is called the parameter view.
Signal Studio for WiMAX User Interface Basics E4438C Option H13 Resizing Window Panes and Cell Columns You can resize window panes and cell columns for better viewing. As you move the mouse pointer over a border it changes form, indicating that the border can be moved horizontally or vertically. Hold down the left mouse button and drag the border to its new position. Collapsing and Expanding Tables To create more viewing space in a window pane, you can collapse selection tables you are not using.
E4438C Option H13 Signal Studio for WiMAX Main Window Main Window This section provides detailed descriptions for each of the sections in the user interface. Main Menu • New: Discards the current settings and sets application-specific parameters to their default state. • Open: Reloads a saved Signal Studio software configuration file (with an .xml extension). • Save: Save the current settings to a configuration file.
Signal Studio for WiMAX Main Window E4438C Option H13 View Menu • Toolbar: Displays or hides the Toolbar. Toolbar is displayed when this is checked. • CCDF Graph: Displays or hides the CCDF Graph plot area. CCDF Graph is displayed when this is checked. • Frame Plot Graph: Displays or hides the time-domain Frame Plot area. Plot is displayed when this is checked.
E4438C Option H13 Signal Studio for WiMAX Main Window Help Menu • Help: Feature not implemented in this special release version. • About: Displays the version and build date of the Signal Studio software. Figure 7 Help Menu Tool Bar The Toolbar presents buttons that are shortcuts to selected functions in the Main Menu described on “Main Menu” on page 13. Holding the cursor over each button will cause the name of that button to be displayed.
Signal Studio for WiMAX Main Window E4438C Option H13 Parameter View Parameter View shows the parameters for defining the signal. The display changes based on what parameter has been chosen in the Tree View, described in “WiMAX Project Parameters” on page 22. Figure 9 CCDF and Waveform Graph View The graph view is divided into two areas: the CCDF plot on the left side and the waveform plot on the right side. A waveform can only be plotted after it has been generated.
E4438C Option H13 Signal Studio for WiMAX Waveform Graph Waveform Graph Click the “Power” button to select from the list of different waveform plots. Selections include Power, I+Q, I|Q and Spectrum. Each click selects the next plot type in the list. You can also click the arrow to access a drop-down menu where you can make a direct selection. If the total number of points exceeds 64000, the first 64000 points are shown. 1. “Power” is the power value plot with each data point formula being I2 + Q2 ⋅ 2.
Signal Studio for WiMAX Frame Plot E4438C Option H13 Frame Plot Figure 11 Frame Plot The Frame Plot shows the time-domain bursts on the frame. The “Zoom up/down” buttons provide a 2x zoom up or 1/2 x zoom down. The left and right arrow icons shift the frame by 1/4 of the total length. You can also double-click on the plot to zoom up one level, or drag the mouse to shift the frame left or right.
E4438C Option H13 Signal Studio for WiMAX Quick Setup View Quick Setup View The Quick Setup menu allows the user to change from the current project to a predefined or user-defined project easily by clicking on the button for a project. This is a pre-defined button. This is a user-defined button. The button name can be specified when created. Display Quick Setup View To display the Quick Setup view, select “Quick Setup” from the Tree View on the left side area.
Signal Studio for WiMAX Quick Setup View E4438C Option H13 Creating a New Button Click this button to save the current Signal Studio software configuration to a custom quick setup button. A window appears enabling you to enter a label for the quick setup. This operation is identical to using the “Save As” function, except that the configuration is now more easily accessible from the Quick Setup view.
E4438C Option H13 Signal Studio for WiMAX Instruments View Instruments View Instruments view specifies the instrument list for downloading the generated waveform data. Up to 10 instruments are listed. Display Instruments View To display the Instruments View, select “Instruments” from the Tree View on the left side. The “Instruments” node is always located on second line from the top tree-node. (Below “Quick Setup”) Figure 13 Instruments View Parameters • #: Instrument number.
Signal Studio for WiMAX WiMAX Project Parameters E4438C Option H13 WiMAX Project Parameters Project View The project view allows the user to select the parameters for the WiMAX signal and the settings for the ESG.
E4438C Option H13 Table 1 Signal Studio for WiMAX WiMAX Project Parameters Project Parameters Item Range Default Description Project Name up to 8 characters Untitled Project name used for the download filename. Project Comment up to 32 characters Mirror Spectrum NORMAL | INVERTED NORMAL Select whether spectrum is inverted or not.
Signal Studio for WiMAX WiMAX Project Parameters E4438C Option H13 Frame View The Frame View shows a list of bursts for both Downlink and Uplink. It is possible to add or delete various types of bursts. You can also change the order of the bursts by highlighting a burst and then clicking the “Move Up” or “Move Down” button. The maximum number of bursts is 100 per downlink or uplink.
E4438C Option H13 Signal Studio for WiMAX WiMAX Project Parameters Buttons on the Frame View • Check Parameters verifies whether there is at least one burst in the frame or not and the bursts don't overflow the frame time duration. If it is ok, a message “Parameters are fine” is shown on the status bar. Otherwise an error message will be shown. The same check is automatically done when you click on “Generate.” • Add Preamble adds a preamble on the current link. • Add FCH adds a FCH burst.
Signal Studio for WiMAX WiMAX Project Parameters E4438C Option H13 Preamble View Figure 13 Preamble View In the Preamble View, the following parameters are shown: Table 2 Preamble Parameters Item Range Default Description Burst Type Preamble Preamble Shows the type of burst (fixed value) Preamble Type Long Preamble | Short Preamble Long Preamble This appears only for the downlink. Select the preamble type.
E4438C Option H13 Signal Studio for WiMAX WiMAX Project Parameters FCH View Figure 14 User’s Guide FCH View 27
Signal Studio for WiMAX WiMAX Project Parameters Table 3 E4438C Option H13 FCH Parameters Item Range Default Description Data Type 0000 to 1111 | S(BPSK) to S(64QAM) | PN9 | PN15 | USER 0000 Select the payload data type. A 'Data Type Entry' window will open and selections are made there. Payload Length (Bytes) 11 11 The payload length for FCH is fixed to 11. Burst Type FCH FCH This shows the type of burst. It is fixed to 'FCH'.
E4438C Option H13 Signal Studio for WiMAX WiMAX Project Parameters Data Type Entry Pop-up Window for FCH By selecting Data Type in the FCH view, the Data Type Entry window will pop up. Figure 15 Data Entry Window Data Type Entry • 0000 - 1111 are fixed 4-bit data patterns. • S(BPSK), S(QPSK), S(16QAM) and S(64QAM) are the data sequences for receiver sensitivity test that are specified in section 8.3.10.1 of the IEEE 802.16-2004 standard. • PN9 and PN15 are pseudo-random sequences.
Signal Studio for WiMAX WiMAX Project Parameters E4438C Option H13 User Bits Editor User-defined values are shown in the bottom half area. The maximum bit length of the user data is 1408 bits. • Copy/Paste operation is allowed by using Ctrl-C/Ctrl-V. • 'Import from File' is used to read from an external '.txt', '.csv' or '.bin' file. • 'Export to File' is used to write the current bits into a file. • 'DLFP Editor' button allows the user to create an FCH bit sequence easily.
E4438C Option H13 Signal Studio for WiMAX WiMAX Project Parameters DLFP Editor Pop-up By pressing 'DLFP Editor' in the FCH Data Type pop-up window, the 'DLFP Editor' window will appear.
Signal Studio for WiMAX WiMAX Project Parameters E4438C Option H13 DLFP Parameters Set these parameters to build the appropriate DLFP (Downlink Frame Prefix) bits. The 'BSID' and 'Built Frames' values are read from 'WiMAX Specific Parameters' in the Project View. DLFP Contents After configuring the DLFP Parameters, press the “Generate DLFP” button. This creates the DLFP contents and the result is shown here. The total length is based on the value specified in 'Built Frames'.
E4438C Option H13 Table 4 Signal Studio for WiMAX WiMAX Project Parameters Burst View Parameters Item Range Default Description Data Type 0000 to 1111 | S(BPSK) to S(64QAM) | PN9 | PN15 | USER 0000 Select the payload data source. The 'Data Type Entry' window will open to allow the selection. Payload Length (Bytes) Minimum: 1 1 This is a read-only parameter. It shows the length in bytes that is used for the modulation on the physical layer.
Signal Studio for WiMAX WiMAX Project Parameters E4438C Option H13 Data Type Entry Pop-up Editor for DL/UL Burst Figure 18 Data Type Entry Pop-up for DL/UL Burst By selecting 'Data Type' in the DL/UL view, a 'Data Type Entry' window will pop up. Data Type Entry • 0000 - 1111 are fixed 4-bit data patterns. • S(BPSK), S(QPSK), S(16QAM) and S(64QAM) are the data sequences for receiver sensitivity test that are specified in section 8.3.10.1 of the IEEE 802.16-2004 standard.
E4438C Option H13 Signal Studio for WiMAX WiMAX Project Parameters User Bits Editor User-defined values are shown in the bottom half area. The maximum length of the user data is 251,280 bytes (2,010,240 bits). • Copy/Paste operation is allowed by using Ctrl-C/Ctrl-V. • “Import from File” is used to read from an external '.txt', '.csv' or '.bin' file. • “Export to File” is used to write the current bits into file. • 'MAC PDU Editor' button allows the user to create a MAC PDU sequence easily.
Signal Studio for WiMAX WiMAX Project Parameters E4438C Option H13 MAC PDU Editor Figure 19 MAC PDU Definitions By pressing 'MAC PDU Editor' in the Data Type Entry popup window, a 'MAC PDU Definition' window will appear. In this window, the user should set up the 'MAC Header' and 'Payload Data' parameters first. Next, press 'Generate MAC PDU' button and the data will appear in the 'PDU Contents' section.
E4438C Option H13 Signal Studio for WiMAX WiMAX Project Parameters MAC Header Table 5 MAC Parameters Item Range Default Description MAC PDU Type MAC PDU | RAW MAC PDU Select the MAC PDU type.#MAC PDU: header (6 bytes) is included. CRC (4bytes at the end) can be included if 'CRC' is 'On'.#RAW: only payload bytes are generated. Header Type Generic PDU Type This is fixed to 'Generic PDU Type'. Encryption Encryption Off This is fixed to 'Off'.
Signal Studio for WiMAX WiMAX Project Parameters E4438C Option H13 Payload Data • 'Get' Button: When the 'Get' Button is pressed, the selected sequence with the specified length is pasted to the 'Payload Bytes' field. • Payload Data Length: This field is referred as the payload data when the 'Generate MAC PDU' button is pressed. When the 'Get' Button is pressed, the selected sequence with the specified length is pasted here. It is also a user-editable field.
E4438C Option H13 Signal Studio for WiMAX Troubleshooting Troubleshooting Troubleshooting the GPIB Interface 1. Ensure that the cable and all connectors are undamaged. 2. Ensure that the GPIB cable is securely connected to the PC and the ESG. 3. Verify that the GPIB address entered in the software matches that of the ESG. In the software, click 'Instruments' in the Tree View to view the GPIB settings. 4. Validate the connection. Select an ESG connection and click 'Test Connection'.
Signal Studio for WiMAX Troubleshooting CAUTION E4438C Option H13 Do not use “Save As” when saving the hosts file; this file does not have a file extension. Software Problems After downloading the waveform, the ESG displays error: Baseband Generator DAC over range. Cause: The number of frames and some baseband filter selections (such as NONE) can result in a high crest factor, causing digital-to-analog converter (DAC) overflow.
E4438C Option H13 Signal Studio for WiMAX Safety and Regulatory Information Safety and Regulatory Information Introduction Review this product and related documentation to familiarize yourself with safety markings and instructions before you operate the instrument. This product has been designed and tested in accordance with international standards. Before Applying Power Verify that the product is configured to match the available main power source.
Signal Studio for WiMAX Safety and Regulatory Information E4438C Option H13 Warnings WARNING The WARNING notice denotes a hazard. It calls attention to a procedure, practice, or the like, which if not correctly performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met.
E4438C Option H13 WARNING Signal Studio for WiMAX Safety and Regulatory Information If this product is not used as specified, the protection provided by the equipment could be impaired. This product must be used in a normal condition (in which all means for protection are intact) only. Cautions CAUTION The CAUTION notice denotes a hazard.
Signal Studio for WiMAX Safety and Regulatory Information E4438C Option H13 Instrument Markings ! When you see this symbol on your instrument, you should refer to the instrument’s instruction manual for important information. This symbol indicates hazardous voltages. The laser radiation symbol is marked on products that have a laser output. This symbol indicates that the instrument requires alternating current (ac) input. The CE mark is a registered trademark of the European Community.
E4438C Option H13 Signal Studio for WiMAX Contacting Agilent Contacting Agilent By internet, phone, or fax, get assistance with all your test and measurement needs. Online assistance: www.agilent.
Signal Studio for WiMAX Contacting Agilent 46 E4438C Option H13 User’s Guide
