Date: 03/17/2008 Product: Tektronix Ultra Wideband Spectral Analysis Version: v2.2.1 (Mar 17, 2008) =============================================================== Contents of this Readme File: 1. System Requirements 2. Contents of Distribution 3. New Features 4. Release Notes 5. Known Problems and Limitations 6. Installation 7. Contact Information =============================================================== 1. System Requirements - Tektronix Ultra Wideband Application Software is intended for Tektronix DPO/DSA oscilloscopes 2.5GHz or greater Tektronix TDS oscilloscopes 7GHz or greater =============================================================== 2. Contents of Distribution - Tektronix Ultra Wideband Application Software - MATLAB run-time library - Sample waveform files, including: High Speed Serial Radar WiMedia =============================================================== 3. New Features: V2.2.1 (2008-Mar-17) -Report generator now includes a statistical summary when all packets/pulses in a waveform are selected for analysis -Added reporting of Avg Power (also by band for WiMedia) -Added reporting of EVM by band (for WiMedia) -Added reporting of Mask Hits by band (for WiMedia) -Added user-definable preamble sync threshold (for WiMedia) -Added "Enhanced packet finder" option for WiMedia signals: -Uses frequency selective filtering during detection of WiMedia packets at the cost of slightly longer processing time. This feature is off by default, but can be used when out-of-band signals interfere with the detection of WiMedia packet boundaries. -Correction to amplitude scaling of exported IQ data V2.2.0 (2008-Feb-11) -Added report generator feature. -Added support for MATH sources. -Added style controls for Voltage-vs-Time plot. -WiMedia Analysis: -New plot: EVM-vs-Symbol -New plot: EVM-vs-Subcarrier -Added Frequency Tolerance measurement -Added Preamble Cross Correlation measurement -Added Relative Power measurements -Added controls for setting preamble length -Added controls for setting analysis length (# symbols) -Interactive browsing of constellation data by symbol and subcarrier using cursors on new EVM plots -More-intuitive Spectral mask display -Auxiliary plots available showing CPE-vs-Symbol and CE Mag/Phase-vs-Subcarrier -Performance improvements in speed & memory usage. V2.1.0 (2007-Sep-19) -New Spectral + Downconversion Analysis type for creating baseband data for further analysis in other tools such as Tektronix RSA Vu and MATLAB. -User-definable resolution bandwidth for Spectrogram and PSD plots. -Time-linked cursors on Voltage/Spectrogram plots now trigger display of time-localized (single frame) PSD. -Recalc button allows user to explore analysis options without recapturing waveform data. V2.0.1 (2007-Apr-30) -Improved handling of long record-length acquisitions. -Added "WiMedia / Wireless-USB Compliance Test" mode (enables CPE filter and limits analysis to 96 symbols). -Correction to EVM calculation when using CPE filter. -Corrected behavior when Data Rate is set to "Manual" and packet contains more than 96 symbols. -Updated Constellation plot to reflect all symbols analyzed (had been limited to first 100 symbols only). -Corrected a GPIB bus timeout problem which could lead to application lock-up under certain acquisition conditions. V2.0.0 (2007-Mar-21) -Initial general release of TekUWB. -Analyze how complex wideband signals change in frequency and amplitude with time using Spectrograms to 20GHz. -Measure how signal power is distributed with frequency using Power Spectral Density plots to 20GHz. -Analyze specific signals in the presence of other traffic using time-gating and/or packet-selection within records up to 200 Mpts. -Correlate Frequency-domain to Time-domain with cursors linking Amplitude-vs-time and frequency-vs-time displays. -Automatically detect all 10 Time Frequency Codes and all 8 data rates directly from WiMedia RF waveforms for easy setup and analysis. -Digital down conversion, demodulation and analysis of all 6 WiMedia Bandgroups. -QPSK and DCM constellations and EVM tests based on the automatically detected data rate. -Adjacent Channel Power Ratio measurements in all bands within a bandgroup from a single waveform. -"Test All" function makes quick work of analysis, results logging and export of MB-OFDM modulated waveform files. =============================================================== 4. Release Notes - "Analysis Type" popup-menu has 3 options: -Spectral Only (no modulation) -Spectral + Downconversion -WiMedia PHY Test Specification 1.2 - Default mode is "Spectral Only". - When performing WiMedia analysis: -The user should select the appropriate bandgroup for the signal being studied via the "Band Group" popup-menu. -This application can auto-detect the TFC of the signal. However, if problems are encountered during demodulation, the user can override auto-detection by selecting a specific value in the "TFC" popup-menu. -This application can also auto-detect the data rate. However, if problems are encountered during demodulation, the user can override auto-detection by selecting a specific value in the "Data Rate" popup-menu. -If the data rate is set to "Auto", then the number of symbols to analyze is determined automatically from the packet header. If the data rate is set to "Manual", then all symbols found when scanning through the packet payload are analyzed. -For WiMedia, the display is modified as follows: -Controls for WiMedia Analysis Settings are displayed. -Power Spectral Density is separated by band, and ACPR, mask test, and power measurements are included. -The Constellation plot is included. -The EVM-vs-Symbol plot is included. -The EVM-vs-Subcarrier plot is included. -Additional detailed information about the modulation analysis is reported on the UI and in generated reports. -The Results History is populated. - Packet/Pulse detection and selection: -This application features a packet detector which scans the waveform and tries to identify the presence of a finite-duration signal. When multiple packets have been identified, the user can select which packet to analyze via the "Packet Selection" buttons on the UI: -1st: Analyze first packet only -2nd: Analyze second packet only -3rd: Analyze third packet only -4th: Analyze fourth packet only -ALL: Analyze all packets in succession (100 max) -OFF: Analyze entire waveform (ignore packets) -This application features an enhanced packet finder mode which uses frequency selective filtering when searching for WiMedia packet boundaries. If there is significant out-of-band interference during acquisition, using this mode will greatly improve the detection of WiMedia packet boundaries at the cost of slightly increased processing time. - Interactive zoom feature is available on all plots: -Click and drag to select zoom area. -Click once w/out dragging to return to previous view (or click on the magnifying glass in the upper right corner). -Double-click to return to full view. - Details on WiMedia terminology: -Band numbering: There are 14 bands (each 528MHz wide) spanning the 3100MHz to 10600MHz UWB spectrum. -Band groups: There are six band groups within the UWB spectrum. Band groups 1 to 5, each consisting of three 528 MHz bands (except band group 5 which has only two bands) lie in sequence across the UWB spectrum. Band group 6 also consists of three 528 MHz bands, but it straddles the frequency space of band groups 3 and 4. -Time Frequency Codes (TFC): There are 10 hopping patterns (TFCs) defined in the WiMedia standard. Four patterns spread the coded information across three bands (Time- Frequency Interleaving or TFI). Three patterns spread the coded information across two bands (TFI2). The remaining three patterns transmit the coded information on a single band (Fixed Frequency Interleaving or FFI). -Common Phase Error (CPE) of the transmitter is corrected on a symbol-by-symbol basis in the EVM calculation. -CPE filtering analysis allows the EVM calculation to "see" the transmitter's phase noise impairments. -The EVM is calculated over the payload of the packet only. The calculation includes initial channel estimation using the CE symbols and phase and timing estimation and correction using the pilot tones as well as estimating the frequency offset. The phase error is estimated using the pilot tones and the timing error and common phase error is calculated. Timing error is corrected. The CPE is applied to the CPE filter. For each data and pilot subcarier the Euclidean distance to the closest constellation point is calculated. The RMS error is calculated using the WiMedia equation. - TekUWB is powered by MATLAB software. -MATLAB is a registered trademark of The MathWorks, Inc. =============================================================== 5. Known Problems and Limitations - Proper analysis of WiMedia signals generally requires an acquisition sample rate of 20 GS/s or higher and record lengths of 1 Mpts or more. This application will not even attempt WiMedia analysis unless the sample rate is at least 250 MS/s with a record length of 100 kpts or more. - When using TekUWB with very long captured waveforms (generally over 100 Mpts), it is possible for the application to run out of available memory with the operating system. This condition depends on the number of other applications running, the length of the waveform being analyzed, and what type of analysis is being performed. If an "OUT OF MEMORY" error message is encountered, we recommend using the time gating feature on the oscilloscope to reduce the amount of data being analyzed. To use this feature, place the instrument cursors around the part of the captured waveform you wish to analyze before beginning an analysis with TekUWB. =============================================================== 6. Installation A. Double-click on the setup.exe file located on the CD. B. Follow the default prompts. 1. If a MATLAB Component Library 7.5 installer message concerning .NET Framework is shown, simply click on OK to continue the install. C. This will install three components: 1. Tektronix Ultra Wideband Application Software 2. MATLAB run-time library 3. Test Waveform files D. A "Ultra Wideband Spectral Analysis" menu item is added to the TekScope Analyze or Application (App) menu. =============================================================== 7. Contact Information - Telephone: Contact your North America Tektronix Representative at: 1-800-833-9200 Sales support, select option 1 Service support, select option 2 Technical support, select option 3 For product support outside of North America, contact your local Tektronix sales office or distributor. -WEB: http://www.tek.com/ Click on "Software & Drivers" under the "Resources" set of links on the left. Type "Ultra-Wideband" into the search field and click "GO". ---End of File---