LeCroy EVM Compliance Test Procedure

Transcription

1 Technical Guide USB-IF & Intel Crpratin EVM Cmpliance Test Prcedure LeCry EVM Cmpliance Test Prcedure December 6, 2007 Revisin 1.0

2 Significant Cntributrs Chris Bauer, USB-IF David Wdard, Intel Crpratin Marc Wells, Intel Crpratin Dan Frelich, Intel Crpratin Rahman Ismail, Intel Crpratin Jseph Schachner, LeCry Mike Micheletti, LeCry Revisin Histry Revisin 1.0 Release - December 6, 2007 LeCry EVM Cmpliance Test Prcedures 2 Rev /6/2007

3 Table f Cntents 1. Summary Intrductin Scpe References Wrkstatin Preparatin Equipment and Materials Sftware and Drivers Recmmended Cmputer System Hst Cmputer HW/SW Cnfiguratin Sftware Installatin EVM Testbed and Hardware Setup Recrd Wavefrm Data frm DUT Saving Scpe Wavefrm Data EVM Sftware Operatin Operating EVM Sftware Lg File and HTML Results...23 LeCry EVM Cmpliance Test Prcedures 3 Rev /6/2007

4 1. Summary This dcument illustrates EVM applicatin technical instructins and peratin. A qualified systems technician shuld perfrm the prcedures. Instructins included in this dcument: System Preparatin SW and Scpe Setup EVM Applicatin peratin 2. Intrductin The Wireless USB Cmpliance Cmmittee under the directin f the USB-IF, Inc., develps the Wireless USB EVM Test Prcedures. This is ne f three dcuments fr the Wireless USB EVM Test Prcedures. These dcuments are prvided as a resurce fr EVM cmpliance testing and is recmmended when cmpliance testing WUSB prducts and nly ne f the three is required fr WUSB Cmpliance Certificatin. The Wireless USB EVM Cmpliance Test Prcedures prvide a methd f verifying cmpliance parameters as defined in the EVM Test Specificatin, using a Knwn Gd Wireless USB Hst r Device as defined by the Wireless USB specificatin. In additin t passing the EVM test requirements, WUSB capable prducts must als cmplete and pass the applicable cmpliance tests identified in these dcuments in rder t be psted n the USB-IF Integratrs List and use the USB-IF lg in cnjunctin with the said prduct (if the vendr has signed the USB-IF Trademark License Agreement). This test prcedure is the USB-IF Hst and Device EVM Test Prcedures written t supprt Agilent, DSO80000 series but des nt exclude ther USB-IF apprved scpe vendrs r their equivalent hardware. 3. Scpe This USB-IF EVM Test Prcedure dcument and tests are used t evaluate the WUSB peripherals and systems perating wirelessly. These tests are als used t evaluate the peratin f wireless USB silicn incrprated in ready-t-ship prducts, reference designs, prfs f cncept and ne f kind prttypes f peripherals, add-in cards, mtherbards, r systems. This test prcedure makes reference t the test assertins in the USB-IF EVM Test Specificatin, and Wireless USB specificatin. Instructins will cver wrkstatin setup, system hardware requirements, and sftware installatin guidelines. All required prgram settings t insure the EVM tl will functin prperly. The wrkstatin setup envirnment, system hardware specificatins, and sftware installatin have been tested and prven by qualified technicians. Any deviatin may result in unpredictable behavir. WUSB testing assumes there will nt be anyway t cnnect the DUT utput (knwn as cnducted testing) r t directly put the Device int a test mde. Therefre the tests have been structured as radiated tests using Lpback prtcl defined in the Wireless USB specificatin t cycle the DUT thrugh test mdes. 4. References EVM Test Specificatin Appendix A fr EVM Cmpliance Testing Laptps Wireless USB Specificatin PDK System Overview LeCry EVM Cmpliance Test Prcedures 4 Rev /6/2007

5 Acrnyms ACPR ATX/BTX BNC BPS BR CDID CH CHID CK DUT DWA EVM GSS GUI HW HWA MIFS MMC PCI PDK PHY PL PSD RF SMA SN SW SYM TFC TFI/FFI TID Tx USB UWB WHCI WUSB-CV WLAN WUSB Adjacent Channel Pwer Rati Advanced/Balanced Technlgy Extended. Current industry standard mtherbard frm factr Caxial cnnectr with baynet cupling mechanism Bits Per Secnd EVM Test Tl designatin fr Burst Mde Cnnectin Device ID Channel Cnnectin Hst ID Cnnectin Key Device Under Test Device Wire Adapter Errr Vectr Magnitude Giga Sample Per Secnd Graphical User Interface Hardware Hst Wire Adapter; defined in this specificatin as a USB 2.0 cnnected Wireless USB Hst Cntrler. Minimum Inter-Frame Spacing. The minimum time between t successive transmitted packets. Fr burst-mde transfers, this is the exact required time between successive packet transmissins. Micr-scheduled Management Cmmand Peripheral Cmpnent Intercnnect Prduct/Peripheral Develpment Kit Physical Layer. In the Wireless USB specificatin, the PHY is specifically the MBOA PHY[4] Pwer Level, als knwn as TPC r Transmit Pwer Cntrl Pwer Spectral Density Radi Frequency Sub Miniature versin A Cax Cable Cnnectin Serial Number Sftware Symbl (TF Cde) Time/Frequency Cde Time/Fixed-Frequency Interleaving Test Identificatin fr prducts submitted fr certificatin Transmit Universal Serial Bus Ultra Wide Band Wireless Hst Cntrller Interface (Wireless USB-CV r CV) Wireless USB Cmmand Verifier a cmpliance test tl that evaluates WUSB devices fr cnfrmance Wireless Lcal Area Netwrk Wireless Universal Serial Bus LeCry EVM Cmpliance Test Prcedures 5 Rev /6/2007

6 5. Wrkstatin Preparatin 5.1. Equipment and Materials The fllwing list f cmmercial test equipment is based n psitive experience by the USB-IF members in executing the WUSB EVM tests. This test prcedure is written with a set f specific mdels we use t develp this prcedure. Required: High Speed Scpe LeCry SDA11000 (Band Grup One) nte: higher bandwidth mdels may als be used LeCry LPA t SMA adapter Required: 50-hm caxial Cable 1m (3 ) length with male SMA t male SMA cnnectrs at bth ends, (Astrlabs minibend R ), qty = 3 Required: Antenna with male SMA (ACON Diple ADM3S ), qty = 2 Required: caxial adapter female SMA t female SMA (Pasternack, PE9070) Required: Bradband Amplifier with female SMA input t female utput and heat sink (Mini Circuits ZVA-183-S+) 12V DC Pwer Supply (Linear Pwer, ND) 1m (3 ) 22 gauge wire t prvide pwer t the amplifier frm the pwer supply, qty 2 1m (3 ) 24 gauge twisted pair wire prviding pwer surce regulatr feedback t pwer supply frm amplifier Pwer Supply Enclsure/Cver Panel 12V DC Fan Pwer Crd and fused input cnnectr Required: Test Prbe hlder r vise t psitin the scpe antenna Required: Metric r English tape measure Required: Wireless USB test Device Required: USB-IF WHCI r HWA Wireless USB based PDK Caxial cables and adapters included with the USB-IF WHCI and HWA Technical Dcumentatin Recmmended: UWB/Wireless USB Prtcl Analyzer t enable advanced scpe input triggering Optinal: Spectrum Analyzer 30Hz -18GHz Optinal: Pwer Meter and apprpriate test head Optinal: USB-IF WHCI, r HWA and a knwn gd DWA fr test setup and testbed debug LeCry EVM Cmpliance Test Prcedures 6 Rev /6/2007

7 5.2. Sftware and Drivers Wireless USB-CV Test Sftware Hst Channel Changing applicatin EVM Test Tl Sftware 5.3. Recmmended Cmputer System Current mdel cmputer system with available PCI slts with clearance fr the WHCI USB-IF PDK. Refer t Wireless USB-CV dcumentatin and USB-IF WHCI r HWA Based PDK technical installatin instructins fr system requirements. The fllwing system requirements are tested and insure the highest system stability fr EVM testing. Any mdificatins t this list may result in system related failures r system crashes. ATX r BTX Mid Twer Desktp System Case Intel Desktp Bard (r equivalent) with 2 adjacent 5v PCI slts, fr PDK card clearance Intel Pentium 4 prcessr 1.8GHz r Higher clck speed 512MB r mre f RAM Minimum 450W Pwer Supply Unit with AC Pwer Switch DVD/CD-Rm Drive Minimum 40GB Hard Disk with at least 10GB f free space Mnitr, Keybard and Muse Windws XP Prfessinal Editin SP2 (English) OS, USB-IF PDK WHCI r HWA Wireless USB-CV test driver and applicatin installed EVM Tl pst prcessing cmpliance applicatin installed 5.4. Hst Cmputer HW/SW Cnfiguratin Recmmended system requirements: The fllwing system requirements are tested and insure the highest system stability fr the PDK. Any mdificatins t this list f hardware may result in system related failures r system crashes The listed equipment is the fficial Knwn Gd testbed used by the USB-IF and affiliated test huses fr certificatin purpses. If a specific knwn gd device cannt be btained, it may be substituted with a similar, certified device. If a substitutin is necessary, the fllwing guidelines will help t select an apprpriate replacement WUSB Hst System: The mtherbard shuld have 2 adjacent PCI slts ne t hld the WHCI WUSB Hst Adapter and the secnd prvides adequate space fr the attached PHY. The secnd cmputer must have an Embedded EHCI including 2 adjacent USB prts fr HWA WUSB dngle preferably lcated in the frnt panel When testing EVM n a vendr supprted WHCI r HWA. (Cnfiguratins such as: WUSB PCI Hst cards in desktp cmputers r integrated WUSB hsts inside laptps) A knwn gd native device r DWA is required t verify the WHCI r HWA under test. Befre EVM testing, insure the required test sftware cnfiguratin is running and the mst recent PC sftware is up t date. NOTE: If the DUT and LeCry EVM Cmpliance Test Prcedures 7 Rev /6/2007

8 system under test fails t supprt the sftware and the tls described in this test prcedure, the DUT will be recrded as a failure The prcessr speed is nt imprtant, but the fact it supprts hyper-threading is. Using a hyperthreaded prcessr significantly imprves perfrmance f multiple high-speed WUSB devices and perating the EVM test tl sftware. Memry and disk strage shuld prvide enugh strage space t eliminate insufficient resurces fr sftware Sftware Installatin Install the latest recmmended Wireless USB-CV msi file and EVM tl sftware prvided by USB-IF. 1. Install Wireless USB-CV.msi 2. Install the Hst Channel Change Applicatin (primarily fr diagnstics purpses while testing). Recmmended but nt required when running the autmated EVM Test Mdes. This utility allws channel setting fr the WHCI and HWA cmpliance device drivers. Nte: after a change, yu must either, click the Save Settings buttn, r the Save Settings and Exit buttn fr the changes t take place. Creating a shrtcut n the desktp fr the WUSB Settings.exe is recmmended T find the WUSB Settings.exe and applicatin setups navigate t: C:\Prgram Files\USB-IF Test Suite\Wireless USB-CV\Driver\Channel Change Applicatin Rename: HWADriverRegistrySample_reg t = HWADriverRegistrySample.reg; WHCIDriverRegistrySample_reg t = WHCIDriverRegistrySample.reg When prmpted cnfirm each file rename and execute each, cnfirming the install when prmpted. Refer t 5.5 Figure 1 fr an example f the WUSB Settings applicatin GUI. Channel Number: This is the channel number that the driver will use fr radi traffic. This will be read each time the driver initializes, at start-up and als at the beginning f a new run f CV tests. 0-Length Packet: Fr diagnstics purpses and testing. Enable this setting fr prducts that expect an extra 0-length packet. When recrding the packet wavefrm, expect t see this behavir frm the HWA cntrl packets, they shuld fall n a 512-byte bundary. LeCry EVM Cmpliance Test Prcedures 8 Rev /6/2007

9 5.5 Figure 1 3. Install the EVM Tl The latest EVM Tl applicatin shuld be dwnladed frm the WUSB-IF website. Use a separate cmputer t analyze data. NOTE: D nt install the sftware n the scillscpe used fr data cllectin. The EVM sftware is labr intensive, therefre it is recmmended t capture each wavefrm and pst prcess data n a separate cmputer. Once the sftware is dwnladed, duble click n the setup.exe file t install the sftware. After the EVM Tl is installed (setup.exe default: C:\Prgram Files\WMCmpTestRelease) lcate the WMCmpTestRelease.exe After the sftware installatin is finished, shut dwn and restart then install hardware as described per vendr instructins r setup dcumentatin It is nt recmmended t use the same cmputer fr WUSB-CV and EVM Testing. Hwever, if the same cmputer is used, stre the EVM data analysis in a file lcatin islated frm the primary perating system disk. Create an HTML file fr each wavefrm recrded LeCry EVM Cmpliance Test Prcedures 9 Rev /6/2007

10 5.6. EVM Test Bed and Hardware Setup Cnnect an antenna directly t the input f a UWB amplifier. Cnnect the utput f the amplifier t the scillscpe via a high bandwidth SMA cable. Refer t 5.6 Figure 1. In sme cases, an adapter might be necessary at the scpe frnt end. 5.6 Figure Munt the antenna in the test prbe hlder and adjust t be rthgnal t the test bench. The DUT antenna als shuld be psitined rthgnal t the test bench. Begin with the receiving antenna 12.7cm r 5 inches frm the DUT antenna. Refer t 5.6 Figure cm (~5in) 5.6 Figure 2 LeCry EVM Cmpliance Test Prcedures 10 Rev /6/2007

11 Insure adequate distance is placed between the assciatin device s antenna and the DUT. This gives the ability t distinguish DUT signals frm thse f the assciating device. Refer t 5.6 Figure 3. A minimum f 1m is sufficient, but may need t be mved clser fr higher data rates. Figure 1 shws an EVM testbed setup. Further discussin f antenna setup is discussed in sectin 5.7. Assciating Device (WHCI versin) Use specified hardware as illustrated in pht. (Cable, Antenna, & RF Adapter) 1m between DUT and assciating Device 5.6 Figure While a variety f sample rates may be utilized t capture these signals, care must be taken if sample rates belw the Nyquist frequency f the highest frequency cmplement is utilized. Fr simplicity, alias prtectin, and file size ptimizatin, 20GSa/s is the recmmended sample rate fr Band Grup One MB-OFDM UWB and utilized in this dcument. Higher sample rates can be used, but will increase the file sizes Set the hrizntal reslutin t 100µs. This can be adjusted during test prcedure t give maximum reslutin f packets Recrd Wavefrm Data frm DUT Expect tw types f WUSB devices, either hst side r device side. Hst adapters can als be fund embedded in laptp systems. Fr test setup f these devices refer t Appendix A n the USB-IF website. T prevent lss f data, the wavefrms and analyzed wavefrm data shuld be saved in a vendr specific flder islated frm the perating system drive. Befre any testing, create a knwn gd test cnditin by restring a knwn gd backup image Each DWA r Native device requires a numeric r cable assciatin between the PDK test system and the DUT. A Wireless USB cable assciatin driver is supplied with Wireless USB-CV. When testing numeric devices, the vender supprted device must supprt A CHID value f: ( A 0B 0C 0D 0E 0F) Any CDID value: (example: 0F 0E 0D 0C 0B 0A ) CK f all zers: ( ) LeCry EVM Cmpliance Test Prcedures 11 Rev /6/2007

12 Use this driver lcatin when using the hardware install wizard t install the CK f zer driver: C:\Prgram Files\USB-IF Test Suite\Wireless-USBCV\Driver\CK_f_Zer Each WHCI r HWA requires an up t date perating system including all hardware drivers running the latest versin f the WUSB-CV tl and drivers. Use a knwn gd test device when perfrming EVM lpback tests Begin with insuring the hst cmputer is transmitting using TFC1 (channel 9) via the WUSB Settings tl. Refer t 5.5 Figure 1 (nte: Sme Japanese prducts nly perate n TFC7 (channel 15)). Begin with scpe and DUT antenna adjustment befre EVM testing. (Detailed instructins t achieve equivalent amplitudes are explained later in this sectin) Nte: while running The Hst r Device Tx Lpback nly tests, Wireless USB-CV will autmatically perfrm a channel change The first fur EVM test mdes using Rates 53.3, & 200 are required per channel fr certificatin. Time permitting, it is encuraged t run all channels and data rates supprted by the device. Save ne wavefrm per EVM Test Mde. Pass criteria is displayed using the EVM tl. The tl als generates an HTML lg file Nte: If a failure ccurs, recrd three wavefrms fr each failing channel and data rate. If adjustment t the antenna rientatin is made (discussed later in this sectin), then recrd each channel and data rate again. Autmated EVM Test Mdes 1. TFC1, Rates 53.3, 106.7, 200, TFC7; Rates 53.3, 106.7, 200, TFC5; Rates 53.3, 106.7, 200, TFC6; Rates 53.3, 106.7, 200, Test the remaining TFC2-4 Rates 53.3, 106.7, 200, Test the remaining device supprted rates Frm the test suite windw, select the apprpriate EVM test mde resembling the autmated EVM test mdes referenced in sectin Nte: Cmpliance Test mdes are recmmended with advanced scpe triggers by default. The test applicatin is setup t transmit 10K packets fr each test iteratin. Select Debug mde fr manual trigger methds. If a reliable wavefrm acquisitin was nt acquired with the manual scpe trigger methd, repeat the WUSB-CV test mde. 1. TD_7_53 Data lpback Supprted Rate Test: Used t verify what rates the DUT supprts when an adequate distance is placed between the assciatin device s antenna and the DUT fr adequate distance reference refer t sectin The Data Lpback Test is used fr setup and diagnstics. It prvides custmizable TX parameters. 3. In the next windw, select the Device Tx Data Only fr DWA/native device r Hst Tx Data Only fr HWA/hst, and then click OK fr antenna psitining. The next windw will ask fr a max packet size, use Table 1 belw t select the minimum packet size t be transmitted. Larger packet sizes, up t the device maximum can be entered if desired. Once a value is entered select DONE. LeCry EVM Cmpliance Test Prcedures 12 Rev /6/2007

13 Run the selected test iteratin, next select OK t initialize the hardware. If the DUT des nt aut cnnect, press the manual cnnectin buttn indicated by the vendr dcumentatin CV will insert the apprpriate number f symbls per packet t insure the paylad can be measured by the EVM tl. If a wavefrm was nt captured, rerun the same test. The test mde can als be interrupted while transmitting each test packet by selecting Esc twice between a reprted data transfer. This type f interruptin may require a WUSB-CV restart. Number f Bytes fr each Rate t Prduce a 96 Symbl Paylad Rate Num Paylad Num Paylad Bytes (dec) Bytes (hex) C B E AB D Table Figure The next windw will ask fr the number f iteratins. This value represents the number f packets transmitted by the device. On the first run enter 20000, this value can be adjusted up r dwn n subsequent executins fr mre efficient data cllectin. Once the value is entered, select DONE t cntinue. 5.7 Figure 5 LeCry EVM Cmpliance Test Prcedures 13 Rev /6/2007

14 The PHY Rate refers t the data rate t be measured. Be sure this value cincides with the packet size chsen frm table 1. It is recmmended t chse the lwest data rate, 53.3Mb/s, as a starting pint. Once the value is selected, select OK t cntinue. 5.7 Figure The next tw windws will ask fr MMC and device pwer levels respectively. Fr the purpses f EVM testing, zer shuld be entered fr bth windws. Select DONE in bth windws t cntinue Nte: A functinal pwer level test is required fr each WUSB device. A wavefrm pwer level cmparisn can be verified using the HTML lg file generated by the EVM tl. Recrd data fr the adjusted pwer level and cmpare the results. When pwer level testing refer t the Wireless USB specificatin fr specific pwer level settings. Each PL (0-6) cincides with the specificatin, prviding a range f 7 settings. 5.7 Figure The DUT will nw transmit packets using the autmated test mde r at the specified data rate fr the specified number f iteratins. Once yu select Aut n the scillscpe, packets f infrmatin will begin displaying n the screen. Observe the smaller amplitude transmissins frm the WHCI/assciating device, which is psitined further frm the receiving antenna. The larger amplitude bursts cntain data packets, beacns and MMC s. Refer t figure 8. Press the scillscpe Stp buttn, then use the scillscpe s zm cntrls t zm in n the first 10 t 30 symbls f the triggering area. Yu can nw see the symbl amplitudes. Refer t figure 9. LeCry EVM Cmpliance Test Prcedures 14 Rev /6/2007

15 5.7 Figure Figure 9 LeCry EVM Cmpliance Test Prcedures 15 Rev /6/2007

16 Each symbl represents ne frequency band within the band grup. Fr TFC1, symbl ne represents band ne, symbl tw represents band 2, etc. It is imprtant t insure that each band has equivalent amplitudes. If the amplitudes are nt equal, begin rtating the receiving antenna in a clck wise manner until the amplitudes level ut. If this des nt achieve the desired effect, it may be necessary t mve the receiving antenna up r dwn, relative t the DUT antenna. Refer t figure Figure 10 LeCry EVM Cmpliance Test Prcedures 16 Rev /6/2007

17 Once the amplitudes are equal acrss all bands, adjust the vertical reslutin n the scpe such that the packet amplitude extends t ne divisin frm the tp and bttm f the display. This takes maximum advantage f the A/D cnverters within the scillscpe. Hwever, it is very imprtant t insure the signal des nt extend vertically utside the viewing area At this acquisitin rate, beacns will appear as very narrw bursts while data packets will appear apprximately five times wider (depending n the data rate and selected paylad size). If yu can nt see beacns and data packets n the same display, it may be necessary t adjust the scillscpe s hrizntal time scale. See figure 8. Only the 96 symbl packets are used fr WiMedia and Certified Wireless USB testing, therefre it is necessary t insure these packets are saved fr prcessing. This can be dne by randmly hitting run until the packet is captured r triggering can be setup t deterministically capture the signal, the latter is the recmmended methd. 5.7 Figure If the test finishes befre the setup is cmplete, rerun the lpback test. It needs t be running the entire time t make sure there is a signal t acquire Use the single step feature f the scillscpe t freeze the incming wave n the display. Cntinue t d this until at least ne entire data packet can be seen. At this pint, yu can save the wavefrm in the scillscpe s native frmat (.wfm,.bin,.tfc, etc.). Use the file naming structures lcated in sectin 5.8 t name the wavefrms. These files will need t be stred n the cmputer running the EVM tl. See sectin 6 fr peratin f the EVM Tl sftware. Fr advanced trigger ptins, use the LeCry Technical Brief with the LeCry UWBTracer t enable an external trigger ptin Saving Scpe Wavefrm Data The file name shuld cntain all pertinent infrmatin abut the acquisitin, including: TFC, data rate, and acquisitin sample rate (in giga-samples per secnd). An identifier fr the device under test is ptinal (The prduct TID number is recmmended, hwever if this is nt available use the prduct mdel number). NOTE: If the unique file name is nt included, all files fr a single device must be saved in a unique flder t avid cnfusing data frm different devices. The syntax is as fllws (case is nt imprtant; any cmbinatin f lwer and upper case is allwed): LeCry EVM Cmpliance Test Prcedures 17 Rev /6/2007

18 1. PHY1_TFC4_BPS053_GSS20_TID txt (text file r csv, tsv file). 2. PHY5_tfc6_Bps480_gss20_SNDeviceName.trc (LeCry frmat). Nte: The file name entered in the Trace Title field with the Save Wavefrm dialg is previusly appended by a tw character surce f the wavefrm and five digits are appended that are autincremented if multiple files are stred using the same Name. Fr example, if C2 is the surce, the first wavefrm stred using the string as shwn in the Trace Title wuld be named with this specific file naming cnventin: 1. C2PHY5_tfc6_Bps480_gss20_TID _00000.trc 2. C2PHY5_tfc6_Bps480_gss20_SNDeviceName00000.trc. If the DeviceName ends with digits, please add an underscre after it t separate it frm the appended aut-incrementing digits - this is required; the scpe will remve trailing digits frm the Trace Title when creating the file name. The fllwing figure shws the Save Wavefrm menu cnfigured t save binary wavefrms (.trc extensin) using the string abve as the Trace Title. Syntax Descriptin Example tfcx bpsxxx gssxx tpcxx phyxx bxxxx symxxxx br snxxxx X is ne f 1, 2, 3, 4, 5, 6, 7 (TFC1 TFC4 are TFI mdes, TFC5 TFC7 are FFI mdes) XXX is ne f 053, 080, 106, 160, 200, 320, 400, 480 (the data rate in bits per secnd) XX is ne f 20, 25, 40 r ther value determined by scpe (giga samples per secnd) XX is ne f 0, 2, 4, 6, 8, 10, 12 (transmit pwer cntrl, 0 t -12dB attenuatin) XX is a number between 0 and 20 inclusive r a letter frm a t z (identifies the PHY being used) XXXX is a number between 1 and 8192 (number f bytes in paylad) XXXX is a number between 1 and1024 (number f symbls in paylad) When present, indicates packet r packets were transmitted in burst mde XXXX is a number between 0 and 2048 (a sequence number) tfc1 TFC5 bps053 BPS106 gss20 GSS25 tpc0 TPC2 phy1 PHYA b256 B4096 sym96 SYM256 br BR sn0000 SN1 5.8 Chart The TFC can be detected frm the data but the BPS always needs t be specified t make sure the crrect EVM cmputatin is dne If the file name des nt cntain the necessary infrmatin, it will need t be entered via cntrls n the analysis tl befre the data is tested. LeCry EVM Cmpliance Test Prcedures 18 Rev /6/2007

19 6. EVM Sftware Operatin 6.1. Operating EVM Sftware Running the EVM applicatin causes the main windw t appear. This dcument cvers testing in the default mde, fr peratin in the debug mde refer t the EVM Tl sftware manual. (The EVM Tl Sftware is installed with the EVM tl applicatin) Several tests can be perfrmed including: Burst packet timing (verifies MIFS timing between packets in burst mde), Preamble symbl cunt (there must be either 12 r 24 symbls in the preamble), Preamble crss-crrelatin (crss-crrelatin f symbls must exceed 87%) Pwer Spectral Density (PSD) (pwer spectrum must fit within defined mask) Adjacent Channel Pwer Rati (ACPR) (the rati f pwer in band t pwer ut f band must exceed 20) Frequency ffset (carrier frequencies must be within 20 parts per millin f specificatin) Errr Vectr Magnitude (EVM) (errr magnitude in db must nt exceed limit based n transmit data rate). 6.1 Figure Fr the demnstratin in this dcument, all tests are perfrmed with the exceptin f Burst Packet Timing. Select Semi-Autmatic frm the mde drp dwn menu. Als make sure default is lcated in the Template File drp dwn menu A text file will lg the results f the test by placing a check in the Lg Results blck. If a file exists, click brwse t chse the desired utput file. If n file exists, enter the path t where the utput will be LeCry EVM Cmpliance Test Prcedures 19 Rev /6/2007

20 saved and include the lg file name (ex. Results.txt). Write mde allws yu the ability t add t r verwrite an existing file. 6.1 Figure 2 LeCry EVM Cmpliance Test Prcedures 20 Rev /6/2007

21 Underneath the wavefrm file name windw, click the brwse buttn t lcate the wavefrm t be tested. Once the wavefrm is lcated, click add, then click OK. This will cause tw new windws t appear, ne shwing the wavefrm and the ther shwing pwer infrmatin. This is a gd chance t verify that the pwer acrss the three bands are within 2-3dB f each ther while in TFI mdes At this pint the packet select windw is als prpagated. Any packets with a check will be prcessed during testing. All data packets are autmatically checked, if yu have multiple data packets yu may chse t test all r nly specific packets by adding r remving the check marks. Once the packet(s) t be tested are identified, click the Test buttn. 6.1 Figure 3 LeCry EVM Cmpliance Test Prcedures 21 Rev /6/2007

22 Once the testing algrithms have finished, a cmpliance test results windw appears. This windw displays pass r fail status alng with numerical results frm the tests. 6.1 Figure Buttns are lcated acrss the bttm f the main panel t allw viewing f graphical results related t the tests. Shw Packet Pwer and Shw Results are pen by default. Clicking Shw Cnstellatin Plt r Shw PSD Plt prduces the graphical displays shwn in figures 5 and 6 respectively. 6.1 Figure 5 LeCry EVM Cmpliance Test Prcedures 22 Rev /6/2007

23 6.1 Figure Lg File and HTML Results If the Lg Results bx was checked at the beginning f testing, a text was created in the desired directry. An example f this results file is shw in figure 7 belw. Fri Oct 19 09:23: File Ttal Packet Pwer Per Band EVM Sync XCrr PSD Max ACPR Band 1 ACPR Band 2 ACPR Band 3 Freq Pwer Band1 Band2 Band3 XCrr Index Mask Margin M1 M2 M1 M2 M1 M2 Offset phy1_tfc1_bps053_gss25_sndwa phya_tfc1_bps053_gss * Figure This file is useful fr keeping a running cmpilatin f all tests dne n a single device. Any failures by the device are nted by and asterisk (*) t the left f the failing value Als created in this directry is a HTML file fr each wavefrm tested. This file als cntains all relevant results with pass/fail infrmatin Fr mre infrmatin regarding ptins and functinality f the EVM Tl sftware, please see the EVM Tl dcumentatin. LeCry EVM Cmpliance Test Prcedures 23 Rev /6/2007

24 Fr mre infrmatin, cntact USB-IF at This dcument is fr reference nly. THIS DOCUMENT IS PROVIDED AS IS AND WITH NO WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, NO WARRANTY OF NONINFRINGEMENT, NO WARRANTY OF MERCHANTABILITY, NO WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, NO WARRANTY OF TITLE, AND NO WARRANTY ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR SAMPLE, ALL OF WHICH WARRANTIES ARE EXPRESSLY DISCLAIMED. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, USB-IF AND THE AUTHORS OF THE DOCUMENT DO NOT WARRANT OR REPRESENT THAT USE OF THE DOCUMENT WILL NOT INFRINGE THE INTELLECTUAL PROPERTY RIGHTS OF OTHERS. USERS OF THE DOCUMENT ASSUME ALL RISK OF SUCH INFRINGEMENT, AND AGREE THAT THEY WILL MAKE NO CLAIM AGAINST USB-IF OR THE AUTHORS IN THE EVENT OF CLAIMS OF INFRINGEMENT. USB- IF IS NOT LIABLE FOR ANY CONSEQUENTIAL, SPECIAL OR OTHER DAMAGES ARISING OUT OF THE USE OF THE DOCUMENT. Cpyright 2007 USB Implementers Frum, Inc. All rights reserved. LeCry EVM Cmpliance Test Prcedures 24 Rev /6/2007