Training Manual
Contents
1. o s Project node BE SW 11 pts 4 H A Shit P Scan Once 8 Copy o Ston 5 hun Copy o H S Mode Settings ofp Nokia 2 Lady 1860 5 Copy Node Copy Mode Settings Paste Node Settings This will automatically create a golden sample node below the node you want to compare with it and change the mode into Comparison Mode and modifies data list to show the comparisons www emscan com RFxpert 15 SCAN real time results 9 Aggregate Node Purpose Aggregate node is used to combine scanning results based on frequency to have full spherical far field view It can be used for Fixed Frequency Scan Swept Frequency Scan data and Base Station Emulator Scan data The following settings must be the same to form an Aggregate Node Fixed Frequency Scan e Number of scans e Scan Frequency Swept Frequency Scan e Number of scans e Start and stop frequencies e Single point frequencies Base Station Emulator Scan Number of scans Band type Traffic channel PCL levels Right click on Project node and choose Aggregate Node or just click Aggregate Node icon on the A 200909 17 G5M850 lbj x task bar 20090917 GSM850 lbj x TOE Project node W___ e lt ean Gs Aqgregate Node BSE scan GSMaSo 2 BSE scan SSM1s00 1 DCS BSE scan SSM1e00 2 DCS BSE scan 19001 PCS ggregate Mode Fixed Frequency Scan Swept Frequency Scan BSE Scan 511 Scan Project Mode Select t2. DemoSepti2 lbj x Ef C2806 a 000 amp J aii Export Data To Excel Options fx Scan Continously Current location ee 7 Node Settings F Copy Modis W Data List np j All rows Copy Node Settings Near Field Data Paste Node Far Field Data n Mod Bisection Data f Selected rows ata Estimated time Oh Om44s Export to Excel N Delete Node Cancel view Notes Appendix 7 Ideal Measurement Set up the importance of these practices vary with frequency The following note describes the implications of observing diligent measurement practices when using RFxpert Each of these practices has a bearing on measurement accuracy The associated implications vary with frequency The following summarizes the implications of following the recommended practices You may choose to ignore some of these after assessing ease of set up vs impact 1 Isolate measurement from immediate metallic surroundings more critical for lower frequencies a avoid placement directly on a metal desk b avoid placement under an overhanging metal sheet ledge c avoid placement directly near reflective metal surfaces 2 Use ferrites at both ends of the measurement cables to block surface currents 3 Use attenuators adjacent to signal sources power measurement equipment and DUT s if feed point is fed from an externally wired RF signal source to optimize matching 4 Repeatable positioning of the DUT has an impact on the repeatability of m
3. Radiated Power www emscan com RFxpert 11 SCAN real time results 6 S44 Scan Purpose S4 parameter measurements as a function of frequency S4 amplitude and phase are measured at a single frequency or a series of frequencies over a span through the remote control of a Network Analyzer Scripts can be written Select S44 Scan and open the settings tabs as explained in item 3 Refer to Appendix 5 How to connect Power Meter and Network Analyzer This scan is set up exactly the same way as the Swept Frequency Scan please ref to Swept Frequency Scan with the options settings table as shown above The only difference of this scan is that quicker and more limited results are obtained Typical results are shown below beme epiiBbj ihh phahi _ O x B Project neve S S SO Ral Fai mp hepa Sef Patch iy Promd beegamcy ae z z z Errn z Erini 143 m 17a SOLO E m E aram E SOLON E l aira imi 1m m w 1HE ESO Pee i 1E 1 BESE 1 m on Pa 7m i 1 47 BD T Faapea Haig E a 2 E M oie Hrast daei A juabesprenis user Parua Eau FP aA Labtepress 2 7 bem of RG ean www emscan com RFxpert 12 O scan real time results 7 BSE Base Station Emulator Scan This feature is optional Please contact EMSCAN to activate this option Purpose Power pattern measurements at a single frequency or a series of frequencies over a span through the remote control of a Bas
4. real time results RFxpert Training Manual www emscan com RFxpert O scan real time results Table of Contents Table of Contents RFxpert System Product Cycle Fit RFxpert Software Application l ON ANARWN Start a new project Open an existing project Executing scans Fixed Frequency Scan Swept Frequency Scan Siu Scan BSE Base Station Emulator Scan Golden Sample Node Aggregate Node Appendix 1 Supported Network Analyzers amp Signal Generators Appendix 2 Supported Base Station Emulators Appendix 3 Check Demo Set up Appendix 4 How to switch between NF and FF views Appendix 5 How to create scans with similar settings Appendix 6 How to export data to Excel Appendix 7 Appendix 8 VNA amp Power Meter Setup for Swept Frequency FAQ 1 How do you provide an accurate EIRP estimate despite the fact that only one side of DUT is measured 2 How fast is the full measurement cycle 3 When measuring GSM power how do we address duty cycle 4 How do we capture quickly changing modes for transmitters with rapidly changing sources _ 5 What is the measurement sensitivity Accurate power measurements 6 Are the measurements reliable in noisy ambient environments without an anechoic enclosure 7 Can you measure multiple antennas on different planes 8 What is the measurement sensitivity BERT or Frame error rate test 9 What kind of power supply can be used 10 What is the range
5. 24 Q scan real time results 6 Are the measurements reliable in noisy ambient environments without an anechoic enclosure In cell phone tests we put an intentionally radiating device 30 cm away from the scanner and it did not compromise the cell phone results If the interfering element is 20 dB higher than DUT at 1 meter the effect is minor In more extreme cases where there is predictable interference frequency and level coordination can be used For adjacent test systems operating at very different power levels frequency discrimination isolates the measurement systems The scanner and DUT do not need to be put into an anechoic enclosure 7 Can you measure multiple antennas on different planes Yes This can be done if you know the location of each antenna on the DUT their locations in relation to the sensors and if each antenna is exercised independently The measured data will then be adjusted based on distance tables 8 What is the measurement sensitivity BERT or Frame error rate test Depending on the ambient environment BERT or FER tests can be done down to levels within 0 dB of galvanic tests 9 What kind of power supply can be used Use the 6VDC power supply that is shipped with the system only It is a global 50 60 Hz and 110v 220v converter 10 What is the range of supported power levels The supported power level range is from 30dBm to OdBm There is no risk in running the RFxpert with le
6. Impact of Separation what is the ideal radiating source distance from surface of scanner The best set up is when the antenna element is placed on the surface of the scanner Sometimes this is not possible because of the position of the antenna in final packaging etc If the separation between the scanner and the antenna is kept to less than 10mm it will have only a small effect on the accuracy of the far field For separations much larger than this the far field accuracy could be significantly compromised 18 What limits the frequency range on either end of the specification The frequency is limited on the high end by the receiver architecture and on the low end by the difficulty in setting up an isolated test environment i e at low frequency the surrounding environment influences the set up more significantly 19 What are the effects on the measurement from driving the antenna with lower power e g dBm vs 20 dBm As long as the power received at the reference probes is high enough there should be no change other than a lower power level As the source power goes out of range you will start to see phase errors first which will influence far field results www emscan com RFxpert 26 Q scan real time results 20 The features specifications indicate measuring dipoles and helical antennas assume that this is done by laying the DUT flat on the scanner bed How do you feed the antenna without having the cable on the scan
7. Papa i 4 T Orr of Pani aera 4 Fas Ferid Phu Beorien Doebered Pelee SE ed a N La ma ET 1H 3j in J kaa PLEI Metar Eee oe Ehon Tee Pele De ee ai E a Eepin Bee Pi ai a ai E E www emscan com RFxpert 17 Appendix 1 Supported Network Analyzers amp Signal Generators Firmware Version E 06 02 E 06 02 E 06 02 A 08 12 Agilent Signal Generator Series 8648D Appendix 2 Supported Base Station Emulators Model S Agilent C8960 with E6702T application Rohde amp Schwarz CMU 200 Appendix 3 Check Demo Set up Results with a typical antenna should Results that look like noise mean the always look smooth with a peak near power is not on the wrong frequency is where the antenna is place selected or the antenna is not working connected properly www emscan com RFxpert SCAN real time results Appendix 4 How to switch between NF and FF views Default view is near field Near field View displays renderings of Near field amplitude and phase patterns and values across the surface of the scanner for Hx or Hy or H the vector sum There are 10 windows for the Near field View Five for Amplitude Distributions e g 3D Amplitude H 2D Amplitude Hx 2D Amplitude Hy 3D Amplitude Hx and 3D Amplitude Hy and five for Phase information C ree Project2 RFxpert 3 0 Saano sIaD01D Near Field Views Far Field Views Polar Far Field Views Cartesian Style o v You can switch be
8. setting is enabled PRAD and EIRP will be adjusted to match the network analyzer power level Settings Frequency Settings Network Analyzer Settings Power Meter Setting Use Stored Profile Meither Note 4 swept Frequency scan can be run without adjustment For output power of the network analyzer but the accuracy of efficiency and gain will be reduced www emscan com RFxpert 10 P SCAN real time results The results of the Swept Frequency Scan render the same near field and far field views as generated with the Fixed Frequency Scan As well a new Data list is prepared with the following important columns the frequency steps S41 gain efficiency EIRP and PRAD As previously described by right clicking for a drop menu the columns can be hidden or shown at the user s discretion shown below Data list h x Index Frequency Efficiency Gain EIRP eos 1 1600 00 0 09 24 00 14 41 2 1610 00 0 07 23 86 14 30 3 1620 00 0 07 25 92 14 33 S 4 1630 00 0 09 23 07 13 49 5 1640 00 0 09 23 14 13 56 6 1650 00 0 14 21 17 11 59 E i 1660 00 0 22 22 09 13 30 8 1670 00 0 18 23 10 13 50 9 1680 00 0 12 23 23 13 62 10 1690 00 0 30 21 05 11 44 11 1700 00 0 51 18 98 9 37 12 1710 00 0 73 17 22 7 60 13 1720 00 0 09 23 26 13 63 14 1730 00 0 11 23 83 14 17 15 1740 00 0 29 21 79 12 12 16 1750 00 0 36 20 51 10 82 17 1760 00 0 43 18 89 9 19
9. Mark As Golden Sample Data list x Index o PRAD EIRP 1 30 35 32 58 5 Delete l 4 5 i 6 Add Edit Motes 24 10 T 29 21 a Export Data List to Excel File 15 66 J 27 15 10 Copy Whole Window Image 21 75 11 20 99 le 22 63 This will automatically create a golden sample node immediately below the scan node It will also automatically change the mode into Comparison and present a revised data list which shows the comparison Data list x y Ind PRAC ERE LE 2 0 Demo lbj x a abi f TE a ES Project node 4 19 73 19 67 6 9 99 10 09 H S Antenna 2 7 13 97 15 20 ai On Scanner B 3 20 4 65 i a Free Space i ear aL 3 N 4600 11 5 53 6 97 Pns Ny Golden Sample From 2600 iz 6 90 5 62 www emscan com RFxpert 14 SCAN real time results To undo the comparison right click on that row again and left click to uncheck the Comparison Mode Data list x a Delete 0 00 3 Ln D elete 14 36 4 19 67 5 Add Edit Motes 14 36 6 10 03 7 Export Data List to Excel File 15 20 g 4 65 J Copy Whole Window Image 13 14 10 viet 11 Mark as Golden Sample 6 97 12 5 62 For Swept Frequency or S41 Scans Select the scan node you want to be the golden sample right click on this node and select Copy Node Project node Scan Once Select the scan node you want to compare to the golden sample right click on this node and select Paste Golden Sample ject1 R40 Testlbj x
10. U ptiora Enable Power Ir e dBm Je Return Loss terest ane Scan Settings Tab Set Frequency There is an optional setting for Power In and Return loss Input these values will enable the software to calculate Gain and Efficiency as well To view these values right click on the Data list column headers and enable the items you want to see al _ Frequency i Index Tires Time Stamp Gain dB Efficiency y PRAD w EIRP www emscan com RFxpert O scan real time results Settings Scan Settings Modulation Settings Bursty TOMA etc Advanced Advanced Setting Timeout 20 ms Range 10 to 50 Threshold s dEm Haldott me us A ange 5 to 50 Modulation Settings Tab The hardware can be adjusted to measure different modulation settings by selecting between a constantly on power source CW CDMA or a bursty source labelled here as TDMA in the Modulation Settings window The bursty setting is adjusted to focus on GSM sources but using the advanced settings can allow many different types of signal to be measured 5 Swept Frequency Scan Purpose S414 power pattern gain and efficiency measurements at a single frequency or a series of frequencies over a span through the remote control of a Network Analyzer Scripts can be written Select Swept Frequency Scan and open the set
11. ase Polarization Diversity S11 Gain Efficiency measured and calculated Far field Patterns Bisections Parameters EIRP PRAD and TRP Continuous coverage through UHF bands 700MHz to 6 0 GHz RFxpert can measure down to 300 MHz Only near field data is meaningful and can be used for debugging purposes RFxpert doesn t recommend the use of far field data below 700 MHz due to the inaccuracy of far field predictions below 700 MHz Most of our customers use the near field data to get real insights on how almost off the shelf antennas are behaving when embedded with the rest of the design so that they can make the right choices to optimize the designs Multiple Modulation Formats Protocols CW CDMA GSM Edge B T 802 11 UMTS variants www emscan com RFxpert SCAN real time results Product Cycle Fit Antenna Design ay Integration passive measurements Repair Loop Production Prototypes active passive Excellent Fit C1 Good Fit Early Ramp EE Limited No Fit Final Design and Sample Lot Product verification Testing Compliance Testing Trials TT FT Device Screening A Pre Production l Manufacturing Process Design www emscan com RFxpert SCAN real time results RFxpert Software Application ATTENTION READ APPENDIX 10 FOR PROPER ENVIRONMENTAL SETTINGS BEFORE USING RFXPERT FAILURE TO DO SO MAY JEOPARDIZE ACCURACY AND REPEATABILITY 1 Start a ne
12. e DUT in order to get a full spherical pattern The DUT should be positioned along the longer axis of the scanner to ensure the aggregate node combines them together properly First scan one side flip the DUT position it along the longer axis and run another scan Then simply go to the Radiated Power Data list window highlight one sample representing one side of the DUT then using the CTRL key highlight and click on another sample representing the other side of the DUT What is displayed is a full slice through the sphere that reflects a merging of two hemispheres one for each side of the DUT This merging will also apply to Bisection Polar View Theta and Bisection Polar View Phi TRP is also calculated Fav held patien berection www emscan com RFxpert 28
13. e Station Emulator Scripts can be written Select BSE Scan and open the settings tabs as explained in item 3 This scan option enables power pattern measurements at a single frequency or a series of frequencies over a span through the remote control of a Base Station Emulator Scripts can be written Settings BSE General Sweep Attributes GPIB Address GPIE Second Address Cell Power Band To specify bandwidth setting set the GPIB address along with Cell Power on the BSE General tab To add a Sweep Channel click on Sweep tab enter Channels and PCL Levels click Add and then click OK Settings BSE General Sweep Attributes Channel Sweep Channel List OOE Co r Multiple Samples i B www emscan com RFxpert 13 SCAN real time results 8 Golden Sample Node Based on the scan type it enables you to 1 compare a single sample in a data list with all of the other samples in that list 2 compare all samples in one data list node with all the samples in another data list node 3 compare a single sample in one data list with all samples in another data list For Fixed Frequency Scan Select a Fixed Frequency Scan and left click on the scan to expose the data list LE 27 0 Demo x kars Project node H S Antenna 1 a Antenna 2 Ee On Scanner r Free Space H Ny 2600 Go to the row in the data list that you want to set as the golden sample Right click on the row and left click
14. easurement results Try to place the radiating element at the centre of the grid use NF results to assist Stay within 2 cm on the long axis and 1 cm on the shortest www emscan com RFxpert 21 Appendix 8 VNA amp Power Meter Setup for Swept Frequency e Do not overload the power sensor maximum rating Otherwise power sensor will be damaged e Achieve input power to DUT between 0 30 dB for reliable data e The red line indicate usage of identical SMA SMA cable S00MHz GHZ 30 dB Gain Sot VNA output to 5dBim 6 dB 15 dB Attenuator Sensor Tt iz Agilent E4413A E Series CW Agilent 44188 EPM Series 6 dB Attenuator r LabExpress www emscan com RFxpert SCAN real time results FAQ How do you provide an accurate EIRP estimate despite the fact that only one side of DUT is measured _ How fast is the full measurement cycle When measuring GSM power how do we address duty cycle How do we capture quickly changing modes for transmitters with rapidly changing sources What is the measurement sensitivity Accurate power measurements Are the measurements reliable in noisy ambient environments without an anechoic enclosure Can you measure multiple antennas on different planes What is the measurement sensitivity BERT or Frame error rate test What kind of power supply can be used What is the range of supported power levels Se a a ee Se a n O Where do place the r
15. eference board NO Does RFxpert require annual calibration What is the accuracy of the RFxpert measurements a WwW have a network analyzer that is not on the list of supported analyzers can it still be supported O1 What are the minimum system requirements What is the maximum power level that RFxpert can receive without being damaged Impact of Separation what is the ideal radiating source distance from surface of scanner A oe O N O What limits the frequency range on either end of the specification co What are the effects on the measurement from driving the antenna with lower power e g dBm vs 20 dBm 20 The features specifications indicate measuring dipoles and helical antennas assume that this is done by laying the DUT flat on the scanner bed How do you feed the antenna without having the cable on the scanner bed without some sort of de embedding Both of these conditions would seem to compromise the integrity of the near field and alter the measurement accordingly 21 When selecting Pattern Settings Properties Amplitude Scale Comparison Type switching from linear to Log10 seems to have no effect What is this supposed to do thought it changed the scale of the near field and far field patterns 22 If put my cell phone on the scanner does it scan 23 How can measure each side of the DUT in order to get a full spherical pattern www emscan c
16. hanges on the peak side or the weak side in the case of SAR optimization are probably all that are necessary for optimizing between options 2 How fast is the full measurement cycle Each measurement including processing and display takes 1 second RFxpert collects the data in 40 milliseconds and then the PC may require an additional 1 second to process and display the data The overall measurement time can be reduced to 300 milliseconds for a simple go no go scan result e g measuring EIRP against a spec limit In TDMA mode the scan time will be longer due to the fact that the system must wait for a pulse to appear Currently the total scan time for a GSM phone is approximately less than 3 seconds 3 When measuring GSM power how do we address duty cycle We tested GSM sources at 1 8 duty cycle At 1 8 it slows down the process GSM has a 500 us pulse The system waits for the rising edge to level out and then measures it 4 How do we capture quickly changing modes for transmitters with rapidly changing sources RFxpert requires the power level to remain constant for 40 ms 5 What is the measurement sensitivity Accurate power measurements RFxpert can measure down to at least 0 dBm for GSM and CDMA To achieve the required accuracy place the DUT on the surface of the spacer For mist frequencies this keeps it out of the extreme near field region but keep it close enough for sensitive measurements www emscan com RFxpert
17. he scan type that you want to aggregate Fixed Frequency Swept Frequency or BSE right click on the node and select Copy Node right click on Aggregate Node and select Paste Node or drag and drop the node under Aggregate Node y LicenseTests lbj x CUP VEST POPES AE gt ee nS LicenseTests bj x PVT ovens lee Project node Ny Fixed Frequency scan BSE scan GSMa5O 1 D BSE scan G5M850 2 BSE scan GSM1300 1 DCS BSE scan G5M1800 2 DCS BSE scan 1900 1 PCS Aggregate Node 300 499 450 Rel S 500 699 650 Re Node Settings Copy Node Settings fe g Project node jer Ny Fixed Frequency scan BSE scan GSM850 1 BSE scan GSMSSO 2 B BSE scan GSM1800 1 DCs E BSE scan GSM1800 2 DCS BSE scan 1900 1 PCS BS 300 499 450 8 500 699 650 16 a LicenseTests lbj x PMP ea Vavomc gt lo lallo Project node 3 Ny Fixed Frequency scan BSE scan GSMSS50 1 D BSE scan GSM850 2 E BSE scan GSM1800 1 DCS 2 BSE scan SSM1e00 2 OCS Ei BEREERE ues 699 650 Ref BS Copy of 300 499 450 Ref 2 300 499 450 Ref 2 500 699 650 Ref www emscan com RFxpert SCAN real time results Aggregate Node will automatically create a combination of the two scan results in the Aggregate node window See example below oy Pach ta Se Patch deter J B haih Abera ope En a Path Biers i Sa TE Patch Atera i opel e T a EE Takie angi fie Patchy Tp Gay al
18. ner bed without some sort of de embedding Both of these conditions would seem to compromise the integrity of the near field and alter the measurement accordingly The system always provides measurement results as is in the near field If a cable is present then very often currents can be seen on it The onus is on the tester to set up the conditions so as best to represent what they want to measure If the cable cannot be moved away from the scanner surface then absorbing foam may help to reduce the impact on the test 21 When selecting Pattern Settings Properties Amplitude Scale Comparison Type switching from linear to Log10 seems to have no effect What is this supposed to do thought it changed the scale of the near field and far field patterns The linear log switch applies to the difference mode of the comparison scan When comparing the near field of two scans that have different power output it is often more instructive to compare the fields in a log sense 22 If put my cell phone on the scanner does it scan You cannot measure the cell phone from your pocket since it is being managed by a live network The output power and transmit times are too variable to get a good measurement However if you were to connect to your phone using a base station emulator RFxpert would be able to measure it accurately www emscan com RFxpert 2 O scan real time results 23 How can I measure each side of th
19. of supported power levels 11 Where do I place the reference board 12 Does RFxpert require annual calibration 13 What is the accuracy of the RFxpert measurements 14 I have a network analyzer that is not on the list of supported analyzers can it still be supported OCOMAAINDNNMN A WH 12 13 14 16 18 18 18 19 20 21 Ideal Measurement Set up the importance of these practices vary with frequency 21 22 23 24 24 24 24 24 25 25 25 25 25 25 25 25 26 15 What are the minimum system requirements 26 16 What is the maximum power level that RFxpert can receive without being damaged 26 17 Impact of Separation what is the ideal radiating source distance from surface of scanner 26 18 What limits the frequency range on either end of the specification 26 www emscan com RFxpert O scan real time results 19 What are the effects on the measurement from driving the antenna with lower power e g dBm vs 20 dBm 26 20 The features specifications indicate measuring dipoles and helical antennas I assume that this is done by laying the DUT flat on the scanner bed How do you feed the antenna without having the cable on the scanner bed without some sort of de embedding Both of these conditions would seem to compromise the integrity of the near field and alter the measurement accordingly 21 21 When selecting Pattern Settings Properties Amplitude Scale Comparison Type switching from linear
20. om RFxpert 23 SCAN real time results 1 How do you provide an accurate EIRP estimate despite the fact that only one side of DUT is measured Effective Isotropic Radiated Power EIRP is the power that has to be supplied to an isotropic antenna to achieve the same field strength EIRP is determined traditionally by identifying and measuring the peak radiated value on the surface of the measurement sphere Cell phones are by design deliberately highly directional into one hemisphere driven by concerns about SAR readings and by interference in the receive mode By measuring in that hemisphere there will be no difficulty in identifying and precisely measuring the peak value So even if you had other devices under test that were not so specifically dominant in one direction you could still accurately estimate the EIRP value What gets potentially compromised in scanner measurements for omni directional sources is accurate far field pattern Radiated power PRAD is obtained by integrating power density obtained from the NF to FF transform over the hemisphere The hemisphere is divided into 50x100 pieces Integration is carried out by summing the power densities over the hemisphere In the current implementation the theta and phi increments are 1 8 and 3 6 deg So in the worst case the PRAD error is 3 dB Both sides can be measured and the power sum taken which will increase the precision As a design tool differential c
21. ss than the minimum supported power RFxpert software will indicate if the signal level is too low to be detected or measured accurately For power levels greater than 10dB over 40dBm RFxpert may be damaged 11 Where do place the reference board To test a device it should be placed on the white plastic spacer The device should be placed with the radiating surface down and ideally positioned in the middle of the spacer The maximum device size can be larger than the scanner area but the radiating surface should be small enough to leave 5cm on each side to the edge 12 Does RFxpert require annual calibration No It does not require any annual calibration 13 What is the accuracy of the RFxpert measurements For high accuracy radiated power measurements TRP is typically 1 5 dB www emscan com RFxpert 25 Q scan real time results 14 I have a network analyzer that is not on the list of supported analyzers can it still be supported If your network analyzer is not on the supported network analyzer list please contact your local representative or EMSCAN at info emscan com for details 15 What are the minimum system requirements Intel Pentium 4 3 0 GHz 512MB recommended Windows XP SP3 OS CD ROM Drive 16 What is the maximum power level that RFxpert can receive without being damaged The maximum power level for accurate measurement is approximately 35dBm into the antenna Damage may occur above 40dBm 17
22. tings tabs as explained in item 3 Refer to Appendix 5 How to connect Power Meter and Network Analyzer Frequency Settings Network Analyzer Settings Power Meter Setting Linear Sweep Start Sli MHz Stop 2750 MHz Remove All Single Point Frequency 300 MHz To specify a sequence of equally spaced settings set the start and stop frequencies along with the number of samples i e the spacing between points And then click Add button in Linear Sweep www emscan com RFxpert SCAN real time results These will be populated in the right hand window To add discrete frequencies enter a value in the 4th window Single Point and click Add button in Single Point to enter Single Point entry method can be repeated number of times maximum number of total entries is limited by the number of VNA settings The example above shows a sample outcome for a script To set the GPIB address for the network analyzer click on Network Analyzer Settings Settings Frequency Settings Network Analyzer Settings Power Meter Setting VALS Settings GPIB Address Set as Default Band Width 10 Output Power To add a power meter click on Power Meter Setting there are two options Use stored profile load up saved power meter profile that is direct connected to antenna source and Enter GPIB address for the Power Meter create a new power meter profile If Power Meter
23. to Log10 seems to have no effect What is this supposed to do I thought it changed the scale of the near field and far field patterns 2 22 If I put my cell phone on the scanner does it scan 27 23 How can I measure each side of the DUT 1n order to get a full spherical pattern 28 www emscan com RFxpert O scan real time results RFxpert System e Shipped Components List 1 p OY 2 Integrated Antenna Board and Processing Section CPC Number AMS RFX M1 USB Cable CPC Number 1100 405 Universal Power Supply CPC Number 1100 404 Electronic User Manual Application CD CPC Number AMS RFX CD M1 Sample reference antenna along with Calibration reference data e Client PC Requirements 1 2 RFxpert client software runs on Window 2000 Windows NT Windows XP Vista and Windows 7 OS platforms Minimum Recommended PC Features Clock Speed gt 1GHz USB Ports at least 1 USB 2 1 protocol support preferred Monitor Screen resolution Operating in wide screen mode aspect ratio greater than 4 3 is recommended for best viewing e Peripheral Equipment Requirements optional 1 2 3 4 e System Ie amp Reference antenna signal source for reference is antenna provided Signal Generator Network Analyzers for S44 measurements and to act as CW RF signal sources BSE Capabilities High speed antenna pattern measurement system minutes to characterize antenna designs 2D and 3D Near Field Patterns A Ph
24. tween these by clicking on the labels at the bottom of each window 3D Amplitude H ASE aaia Ag www emscan com RFxpert 19 SCAN real time results Appendix 5 How to create scans with similar settings Copy a scan node or create a new node of that type and copy settings To copy a scan node first right click on the node and select Copy Node Then right click on Project node and select Paste Node To create a new node and copy settings first select the scan type please ref to Scan Types on page 24 then right click on the node that you want to copy and select Copy Node Settings Then right click on the new Project node and select Paste Node 3 088 DemoSepti2zibj x wade G Projectnode A Een I Scan Once gt Fixed Frequency Scan im Scan Continousty d Swept Frequency Scan BSE Scan Aggregate Node Copy Node a 511 Scan Copy Node Settings i Froject Node Stop Scan Node Settings j Copy Node Add Node With Copied Settihgs Comparison Mode Import Data Export to Excel Delete Node View Notes View Nokes Delete Node www emscan com RFxpert 20 O scan real time results Appendix 6 How to export data to Excel To export data to MS Excel right click on the node and select Export to Excel The window below will appear You can choose specific data or all data to export to MS Excel ee Project node y Fixed frequency 7 gt
25. w project When you start the RFxpert software a new project will start automatically A REED Projecti RFxpert 3 0 d l G EA FiS E Project node To start a new project click La or click sim and select New C a ya New Ctrl N l Darna Eil New Ctrl N Create a new document e 3 2440Ref rfx A raiarti rfu 2 Open an existing project or click and select Open You can access to recently opened files as well Recent Documents 1 DemofFile3 lbj 2 Enfora lbj E3 Open Ctri 0 Open an existing document i O Project node Save Aga 5 360 FF rtx www emscan com RFxpert SCAN real time results 3 Executing scans Right click on Project and select the scan type or click on the related icon see J Project nod Swept Frequency Scan BSE Scan Aggregate Node 11 Scan Project Node Copy Node Paste Node To open the settings tab click Settings icon i or right click the scan node and select Node Settings ai a eai Project node Fixed Frequency scay Scan Once Scan Continaously Stop Scan www emscan com RFxpert O scan real time results 4 Fixed Frequency Scan Purpose Power and Pattern measurement of a device under test at a discrete frequency Select Fixed Frequency Scan and open the settings tabs as explained in item 3 Settings Select Frequency Set Frequency 1880 MHz ource Power L
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