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EMI spurious search

From the first wireless transmissions, electromagnetic interference (EMI) has been a concern for design engineers.
General-purpose spectrum analyzers that contain appropriate filters and detectors are often employed in diagnostics
and pre-compliance, as they are fast measurement tools that often are already used in the design process and do not
require additional capital expense.

■

Demo 9: EMI spurious

Over-the-air demo

This part shows how to use the RSA306 in off-air applications. Using the whip antenna provided with the RSA306
demonstration kit, you can demodulate and listen to the signals from the local FM broadcasting station, see the
realtime spectrum of the signals in the ISM band created by your smart phone, and use the RSA306 in interference-
hunting.

■

Demo 10: FM listening

■

Demo 11: ISM band DPX

 

Introduction

RSA306 Self-Guided Demo 

7

Содержание RSA306

Страница 1: ...Tektronix RSA306 USB Spectrum Analyzer Self Guided Demo P071333000 071 3330 00 ...

Страница 2: ......

Страница 3: ...Tektronix RSA306 USB Spectrum Analyzer Self Guided Demo www tektronix com 071 3330 00 Revision A ...

Страница 4: ...d and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc Contacting Tektronix Tektronix Inc 14150 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support In North America call 1 800 833 ...

Страница 5: ...amental operations of spectrum analyzers 5 Real time DPX 6 Modulation 6 EMI spurious search 7 Over the air demo 7 Setup 8 Demo instructions Demo 1 Basic spectrum measurements with markers 11 Demo 2 Power measurements with markers 26 RSA306 Self Guided Demo i ...

Страница 6: ... Demo 6 Transient capture Mask test and act on violation 51 Demo 7 Analog modulation analysis 59 Demo 8 Digital modulation analysis 67 Demo 9 EMI spurious 76 Demo 10 FM listening Demo board not needed 83 Demo 11 ISM band DPX Demo board not needed 89 Table of Contents ii RSA306 Self Guided Demo ...

Страница 7: ...can do with the RSA306 USB spectrum analyzer Applications range from simple frequency amplitude measurements of RF signals to real time and modulation analysis that provide you with a complete system view of your device under test RSA306 Self Guided Demo 1 ...

Страница 8: ...Check list for the demo Before beginning the demo please be sure you have the following items Item Illustration RSA306 USB spectrum analyzer RTSA demo board Introduction 2 RSA306 Self Guided Demo ...

Страница 9: ...Item Illustration USB Y cable to power the board N BNC adapter Whip antenna Introduction RSA306 Self Guided Demo 3 ...

Страница 10: ...Item Illustration BNC cable USB 3 0 cable Introduction 4 RSA306 Self Guided Demo ...

Страница 11: ...asurements that most Spectrum Analyzer users are already accustomed to The goal of this part is to demonstrate that the instrument has these basic spectrum analyzer capabilities Demo 1 Basic spectrum measurements with markers Demo 2 Power measurements with markers Demo 3 Traces and detectors Demo 4 Save and recall Introduction RSA306 Self Guided Demo 5 ...

Страница 12: ...olation Modulation Digital modulation is used in virtually all modern communication systems These systems have penetrated every aspect of our lives at a rapid pace The growth has put increased stress on the ability to quickly and efficiently analyze a wide variety of digital modulation schemes In some cases general modulation schemes have been included in complex standards with rigorous specificat...

Страница 13: ...d in the design process and do not require additional capital expense Demo 9 EMI spurious Over the air demo This part shows how to use the RSA306 in off air applications Using the whip antenna provided with the RSA306 demonstration kit you can demodulate and listen to the signals from the local FM broadcasting station see the realtime spectrum of the signals in the ISM band created by your smart p...

Страница 14: ...ay work 1 Install SignalVu PC Install the SignalVu PC software onto your PC You can download the software from www tektronix com downloads or it is available on the flash drive that is provided with the RSA306 2 Set up the RSA306 Power the RSA306 by connecting the USB 3 0 cable to the USB 3 0 port of your PC Install the N BNC adaptor on RSA306 3 Setup the demo board Connect one end of the USB Y Ca...

Страница 15: ...Connect the RSA306 to the demo board Connect one end of the BNC cable to the RF port of the RSA306 Connect the other end of the BNC cable to the RF port of the board Introduction RSA306 Self Guided Demo 9 ...

Страница 16: ...SetUpDiagram 2 3 4 Introduction 10 RSA306 Self Guided Demo ...

Страница 17: ...kers When using a spectrum analyzer one of the first settings is that of the frequency In this demonstration we will use markers to locate the CW signal generated from the demo board and set the appropriate frequency for the measurement RSA306 Self Guided Demo 11 ...

Страница 18: ... button to turn on the demo board 2 Set the reference to INT internal reference 3 Set the run mode to FREE RUN 4 Click the ROW and COLUMN buttons to select CW as the signal to generate demoboard1 1 2 3 4 Demo instructions 12 RSA306 Self Guided Demo ...

Страница 19: ...ive Link on the menu bar to view the drop down menu Click Search for Instrument A notification will briefly appear stating that the instrument was found 3 Click Connect To Instrument Select RSA306 USB USB 0 First time connection to the analyzer may take up to 10 seconds rsaconnect 2 3 Demo instructions RSA306 Self Guided Demo 13 ...

Страница 20: ...verify connection status by looking at the connection indicator square on the menu bar It is green when an instrument is connected It is red when it is not You can also view the name of the instrument that is connected by hovering the mouse indicator over the rsaok 4 Demo instructions 14 RSA306 Self Guided Demo ...

Страница 21: ...he Preset button preset 5 6 Click the settings button to display the settings control panel topleft 6 7 Click Max Span to set the Span to the maximum value maxspan 7 Demo instructions RSA306 Self Guided Demo 15 ...

Страница 22: ...k TIP Right Click on Tablet Touch the screen where you want to right click hold until a complete square appears and then lift your finger The shortcut menu appears after you lift your finger markertopeak 8 Demo instructions 16 RSA306 Self Guided Demo ...

Страница 23: ...try of values and Up Down controls by selecting View Numeric Keypad When the Numeric Keypad view is activated up down arrows and a numeric keypad icon will pop up whenever a field requiring input is selected Demo instructions RSA306 Self Guided Demo 17 ...

Страница 24: ...ric keypad icon will pop up a numeric entry box 9 Click To Center in the bottom marker setting area This sets the center frequency of the analyzer to the center of the signal tocenter1 9 Demo instructions 18 RSA306 Self Guided Demo ...

Страница 25: ...10 Set the Span to 40 MHz setspan 10 11 Click Peak 12 Click To Center again tocenter2 12 11 Demo instructions RSA306 Self Guided Demo 19 ...

Страница 26: ...noise level Notice that readouts show The amplitude and the frequency of the reference marker MR The amplitude and the frequency of the selected marker M1 The difference ΔM1 between the selected marker position and the position of the reference marker Demo instructions 20 RSA306 Self Guided Demo ...

Страница 27: ...Demo1 Step13 14 14 14 Demo instructions RSA306 Self Guided Demo 21 ...

Страница 28: ...he directory C SignalVu PC Files Example Files This will give you the correct amplitude frequency span and marker settings automatically This file also contains data collected from a previous test and creates a trace on screen of the result Press Run to clear this data and take results from your instrument Demo instructions 22 RSA306 Self Guided Demo ...

Страница 29: ...display TIP RBW The resolution bandwidth RBW determines the fast Fourier transform FFT bin size or the smallest frequency that can be resolved Smaller RBW improves the selectivity but degrades the sweep speed and the trace update rate rbw 15 Demo instructions RSA306 Self Guided Demo 23 ...

Страница 30: ...16 Select Options from the Tools menu 17 Under the Prefs tab set the Color Scheme to Blizzard blizzard 16 17 Demo instructions 24 RSA306 Self Guided Demo ...

Страница 31: ...You can print screen images with a white background Selecting the scheme color to Blizzard makes the background color changes from black to white in the graphs Demo1Step16Note Demo instructions RSA306 Self Guided Demo 25 ...

Страница 32: ... be noise like and measurements are corrected to a 1 Hz bandwidth Selecting power measurement markers automatically switches the trace detector to Ave RMS for accurate results Integrated power between markers is an easy way to measure the power of a modulated signal without setting up a dedicated channel power measurement Instructions for the demo board 1 Keep the same setting as the last demo Use...

Страница 33: ...1 on right side of the OFDM spectrum 3 Click the Define button in the Marker settings 4 Within the Marker Properties tab in the Readouts dropdown box select Power TIP You can measure phase noise by setting the delta marker to dBc Hz Advanced channel power measurement and ACLR adjacent channel leakage power ratio measurement can be done in Chan Pwr and ACPR display Demo instructions RSA306 Self Gui...

Страница 34: ...3330Demo2Trace 1 2 2 3 4 Demo instructions 28 RSA306 Self Guided Demo ...

Страница 35: ...vailable in SignalVu PC used with the RSA306 Instructions for the demo board 1 Keep the same setting OFDM signal as the last demo Demo3OFDM 1 Instructions for the RSA306 1 Keep the same setting or recall the setting Demo2_OFDM_marker tiq Click Run Demo3Step1 1 Demo instructions RSA306 Self Guided Demo 29 ...

Страница 36: ...2 Right click the screen and select All markers off Demo3Step2 2 3 Click the settings button to display the Settings control panel Demo3Step3 3 Demo instructions 30 RSA306 Self Guided Demo ...

Страница 37: ...ct Trace 1 and then set Detection to Avg VRMS and Function to Avg VRMS Demo3Step4 4 5 Select Trace 2 and then set Detection to Peak Function to Max Hold and enable Show Demo3Step5 5 Demo instructions RSA306 Self Guided Demo 31 ...

Страница 38: ...6 Select the trace to Trace 3 select Detection to Peak Function to Min Hold and enable Show Demo3Steps 6 Demo instructions 32 RSA306 Self Guided Demo ...

Страница 39: ...Avg VRMS Sample and CISPR Pk Trace functions are applied to multiple traces as they are displayed Available settings are Normal Average Max Hold and Min Hold The Number of Traces setting specifies how many traces are averaged The same selections are available in the upper left display selection and mouse over dropdowns Demo instructions RSA306 Self Guided Demo 33 ...

Страница 40: ...e place of the oldest trace in the calculation Max Hold trace displays the maximum value in the trace record for each display point Each new trace display point is compared to the previous maximum value and the greater value is retained for display and subsequent comparisons Min Hold trace displays the minimum value in the trace record for each display point Each new trace display point is compare...

Страница 41: ...Demo instructions RSA306 Self Guided Demo 35 ...

Страница 42: ...nt Adjustment in the secondary direction does not occur until a threshold of 30 pixels of movement is crossed Dragging to the left or down zooms out and displays a smaller waveform increases the scale value Dragging to the right or up zooms in and displays a larger waveform decreases the scale value Pan Adjusts the horizontal and vertical position of the waveform The first direction with enough mo...

Страница 43: ...structions for the demo board 1 Keep the same setting OFDM signal as the last demo Demo3OFDM 1 Instructions for the RSA306 1 Keep the same setting or recall the setting Demo3_OFDM_trace tiq Select Save As from the File menu to open the Save As dialog box Demo4 1 1 Demo instructions RSA306 Self Guided Demo 37 ...

Страница 44: ...folder where you want to save the setups or use the default location Enter a file name Select the type of file to Acq data with setup TIQ tiq Demo4 2 2 3 Click save Demo4 3 3 Demo instructions 38 RSA306 Self Guided Demo ...

Страница 45: ... 4 5 Select Recall from the File menu to open the Open dialog box Navigate to the folder containing the file you want to recall Select the tiq file you just saved to recall and click the Open icon Demo instructions RSA306 Self Guided Demo 39 ...

Страница 46: ...e saved as CSV files Measurement Settings TXT Saves a list of settings relevant to the selected measurement to a text file This option is useful for including the measurement settings in reports Trace Various Saves a trace for later recall into the display from which it was saved Data TIQ CSV MAT Saves data and measurement setup for analysis later TIQ format or as data to use with external softwar...

Страница 47: ... consistent the shape of a trace is Second it uses persistence to hold signals on the screen so you can see them longer The DPX display reveals transient signal behavior that helps you discover instability glitches and interference Instructions for the demo board 1 Keep the same setting as the last demo Use the ROW and COLUMN buttons to change the signal from OFDM to Inf Hop Infrequent hopping sig...

Страница 48: ...Instructions for the RSA306 1 Keep the same setting or recall the setting Demo3_OFDM_trace tiq Click the Display icon Demo5 Step01 1 Demo instructions 42 RSA306 Self Guided Demo ...

Страница 49: ...ct DPX from the Available displays box 3 Click the Add button or double click the DPX icon This will add the DPX icon to the Selected Displays box 4 Click the OK button Demo5 Steps2 4 2 3 4 Demo instructions RSA306 Self Guided Demo 43 ...

Страница 50: ...ps 5 6 Select the Split view You can see the hopping signals displayed in the DPX spectrum and compare it in the standard spectrum display on the right side Note that the standard spectrum display nearly or always misses the transient signal Demo instructions 44 RSA306 Self Guided Demo ...

Страница 51: ...Demo5 Step6 6 Demo instructions RSA306 Self Guided Demo 45 ...

Страница 52: ...ings button TIP Changing the color scheme In the temperature palette the highest color Maximum is deep red and the lowest Minimum is dark blue Values between Maximum and Minimum are represented by the other colors of the palette Demo3Step7 7 Demo instructions 46 RSA306 Self Guided Demo ...

Страница 53: ...Scale tab set the Max scale to 3 for the DPX Spectrum display Demo5 Step8 8 9 Under the Ampl Scale tab set the Min color scale to 80 dBm for the DPXogram display Demo5 Step9 9 Demo instructions RSA306 Self Guided Demo 47 ...

Страница 54: ... signal Then add another marker and drag it to the closest hopping signal The delta marker will show the time between two hopping signals is about 1 25 s or the hop occurs every 1 25 second 12 You can set the size of the DPX spectrogram by selecting the divider bar between the displays and moving it up or down to add area to the display of interest Demo instructions 48 RSA306 Self Guided Demo ...

Страница 55: ...Demo5 Step11 12 11 12 Demo instructions RSA306 Self Guided Demo 49 ...

Страница 56: ...e It depends on interaction between span RBW and FFT length You can use the POI time value to determine if you are at risk of either missing a narrow transient or of its captured amplitude being less than the actual signal The minimum 100 POI for RSA306 is 100 μs Demo instructions 50 RSA306 Self Guided Demo ...

Страница 57: ...tion file in an open data format and or a screen capture when a signal in the frequency domain violates the mask Instructions for the demo board 1 Keep the same setting Infrequent hopping signals as the last demo Demo6 InfHop 1 Instructions for the RSA306 1 Keep the same setting or recall the setting Demo5_DPX tiq Click Run Demo6 1 1 Demo instructions RSA306 Self Guided Demo 51 ...

Страница 58: ...enu click Mask Test Demo6 step02 2 3 Select DPX Trace1 from Search in 4 Select is outside mask from Test for 5 Click Edit limits to open the Mask Test Editor Demo6 3 4 5 3 5 4 Demo instructions 52 RSA306 Self Guided Demo ...

Страница 59: ...cally adjusted to the Reference 8 Click Done TIP Mask Test Editor The margins between the mask and the reference trace can be specified by X Margin and Y Margin The points can be added edited or deleted You can also create a Frequency Mask by using the manual method Demo instructions RSA306 Self Guided Demo 53 ...

Страница 60: ...Demo6 6 7 8 6 7 8 Demo instructions 54 RSA306 Self Guided Demo ...

Страница 61: ...9 In the DPX display and click the settings button Demo6 9 9 10 Select Trace1 as the Trace under the Traces tab Demo6 10 10 Demo instructions RSA306 Self Guided Demo 55 ...

Страница 62: ... select Beep Save acquisition data Save trace and Save picture 13 Click Enable Test When a mask violation is detected the system will sound a beep and save all your selected format of files into the selected folder automatically Demo instructions 56 RSA306 Self Guided Demo ...

Страница 63: ...ave acquisition data save trace data and save a picture of the display In Replay mode it can sound a beep and stop analyzing Files can be saved in the native format of SignalVu PC tiq or in comma separated variable CSV or Matlab level 5 MAT formats The folder for saving files can be selected from Save as Demo instructions RSA306 Self Guided Demo 57 ...

Страница 64: ...Demo6 12 13 12 13 Demo instructions 58 RSA306 Self Guided Demo ...

Страница 65: ...lation AM frequency modulation FM and phase modulation PM This example shows how to analyze an FM signal with the RSA306 Instructions for the demo board 1 Keep the same setting as the last demo Use the ROW and COLUMN buttons to change the signal type from Inf Hop to FM frequency modulation signals Demo7 FM 1 Instructions for the RSA306 1 Click the Preset button Demo7 1 1 Demo instructions RSA306 S...

Страница 66: ...2 Click the Display button Demo7 Step2 2 Demo instructions 60 RSA306 Self Guided Demo ...

Страница 67: ...elect DPX from the Available displays box 4 Click the Add button This will add the DPX icon to the Selected Displays box and remove it from the Available displays box Demo7_Steps3 4 3 4 Demo instructions RSA306 Self Guided Demo 61 ...

Страница 68: ...ox 6 Click the Add button 7 Click the OK button TIP Selecting displays You can also double click the desired display to add or remove it Five application presets are available for the display selection Demo7_5 6 7 5 6 7 Demo instructions 62 RSA306 Self Guided Demo ...

Страница 69: ...PX display by clicking anywhere on it with the mouse and set the CF to 2 445315 GHz and the Span to 500 kHz Demo7 Steps3 8 8 9 Click the Analysis control button Demo7 9 9 Demo instructions RSA306 Self Guided Demo 63 ...

Страница 70: ...10 Under the Analysis Time tab set the Analysis Length to 10 ms Demo7 10 10 11 Click the FM display and then click the settings button Demo7 11 11 Demo instructions 64 RSA306 Self Guided Demo ...

Страница 71: ...12 12 NOTE FM measurements readout Pk positive frequency deviation Pk negative frequency deviation RMS RMS value of the deviation Pk Pk peak to peak frequency deviation Pk Pk 2 peak to peak frequency deviation divided by two Demo instructions RSA306 Self Guided Demo 65 ...

Страница 72: ...Demo instructions 66 RSA306 Self Guided Demo ...

Страница 73: ...re This example shows how to demodulate a QPSK signal with RSA306 This demonstration also introduces the concept of application presets to quickly set up for complex analysis tasks This demonstration relies on the optional modulation analysis capabilities of SignalVu PC If you are using a basic version of SignalVu PC a trial license for this analysis can be accessed through the Tools Manage Licens...

Страница 74: ...Instructions for the RSA306 1 In the Presets menu click application Step1 1 Demo instructions 68 RSA306 Self Guided Demo ...

Страница 75: ...2 Select Modulation Analysis for the Preset Step2 2 3 Click OK Step3 3 Demo instructions RSA306 Self Guided Demo 69 ...

Страница 76: ...cation presets To save setups so that they appear in the Application Presets window save your setup in the folder C SignalVu PC Files User Presets The saved setup will appear in the Application Presets window with the name you give the file Step4 4 Demo instructions 70 RSA306 Self Guided Demo ...

Страница 77: ...p5 5 6 Under the Modulation Params tab Select QPSK from the Modulation Type list set the Symbol Rate to 3 072 MHz set Measurement Filter to Root raised cosine Reference Filter to Raised cosine and Filter parameter to 0 35 Step6 6 Demo instructions RSA306 Self Guided Demo 71 ...

Страница 78: ...r a matching Measurement Filter should be selected in the instrument in order to interpret symbols properly The Reference Filter while not used for demodulation is important for making the proper error vector measurement calculations This filter will normally be defined by the modulation demodulation standard 7 Click the Stop button Step7 7 Demo instructions 72 RSA306 Self Guided Demo ...

Страница 79: ... Drag the marker to any cell in the Symbol Table This sets the marker MR time value to the starting time for the cell containing the marker 10 Look for MR in the Constellation graph Move the marker to different cells in the Symbol Table Demo instructions RSA306 Self Guided Demo 73 ...

Страница 80: ...nstellation diagram and the symbol values TIP Correlated display Not only are all the displays correlated through the shared data set but the markers which are inherently correlated make it very easy to see how a data point in one domain relates to a specific data point in any other This can greatly reduce troubleshooting time Demo instructions 74 RSA306 Self Guided Demo ...

Страница 81: ...Demo8 QPSK 9 10 Demo instructions RSA306 Self Guided Demo 75 ...

Страница 82: ...n the table This example shows how to use the spurious display in SignalVu PC and the RSA306 to perform EMI pre compliance and diagnostics Instructions for the demo board 1 Keep the same setting as the last demo Use the ROW and COLUMN buttons to change the signal type from QPSK1 back to CW Demo9CW 1 Instructions for the RSA306 1 Click Preset Demo9 Step1 1 Demo instructions 76 RSA306 Self Guided De...

Страница 83: ...2 Click the Display button Demo9 Step2 2 Demo instructions RSA306 Self Guided Demo 77 ...

Страница 84: ...plays box 4 Click Add to add the application to the Selected Displays list 5 Select the Spectrum icon in the Selected Displays list 6 Click Remove to clear the icon from the list 7 Click OK Demo9 Steps3 7 3 4 5 6 7 Demo instructions 78 RSA306 Self Guided Demo ...

Страница 85: ...ck the settings button Demo9 Step8 8 9 In the Scale tab select the Log scale to reset the display to show the frequency axis in a logarithmic scale Demo9 Step9 9 Demo instructions RSA306 Self Guided Demo 79 ...

Страница 86: ...ipment such as an amplifier or attenuator External loss tables can be used to apply a frequency dependent gain loss correction to the signal 10 Under the Ranges and Limits tab click Load to select the appropriate limit line and measurement condition 11 Select FCC Part 15 Rad Class A 10m csv for this example Demo9 Steps10 12 10 11 12 Demo instructions 80 RSA306 Self Guided Demo ...

Страница 87: ...ed window of range and limit table can be displayed by clicking Expand You can edit the start and stop range filter shape RBW VBW detector threshold and excursion and limit line Demo instructions RSA306 Self Guided Demo 81 ...

Страница 88: ...After loading the spurious table your display should look similar to the picture below The green bar is the loaded limit line as standards suggest Demo instructions 82 RSA306 Self Guided Demo ...

Страница 89: ...he Audio Demod tab from the Settings control panel of the DPX Spectrum plot display This Demo shows how to use the RSA306 to demodulate the local FM radio signals and listen to the programming Instructions for the antenna 1 Unplug the BNC cable from the RSA306 and connect the provided whip antenna to the RSA306 input Demo10Antenna 1 Demo instructions RSA306 Self Guided Demo 83 ...

Страница 90: ...z TIP FM broadcasting Throughout the world the FM broadcast band falls within the VHF part of the radio spectrum Usually the FM band starts from 87 5 MHz to 108 0 MHz The frequency modulation radio broadcast band in Japan is 76 90 MHz 3 Set the RefLev to 30 dBm Demo10 Steps1 5 1 3 2 Demo instructions 84 RSA306 Self Guided Demo ...

Страница 91: ...reen and click Marker to peak 5 Click To Center in the bottom marker setting area This sets the center frequency of the analyzer to the center of the signal Demo10 Steps4 5 4 5 Demo instructions RSA306 Self Guided Demo 85 ...

Страница 92: ...st PC Demo10 Step6 6 7 Select FM 200 kHz as the demodulation 8 Click Run to start listening to the FM radio signal 9 Adjust the Audio Gain setting so you can hear the demodulated signal The sound level is also affected by the setting of the Windows volume control 10 Click the Browse button to select the location you want to save the steam file Demo instructions 86 RSA306 Self Guided Demo ...

Страница 93: ...o format is wav which can be played by Windows media player in your PC The screenshot below shows the RSA306 is tuned to 91 5 MHz center frequency to listen the local FM broadcasting Drag the marker to other spectrum peaks center the peaks and listen to the programming at other channels Demo instructions RSA306 Self Guided Demo 87 ...

Страница 94: ...Demo10 Steps7 11 7 8 9 10 11 Demo instructions 88 RSA306 Self Guided Demo ...

Страница 95: ...and 802 11b g n WLAN networks have a unique set of RF interference problems because they share the same 2 4 GHz Industrial Scientific Medical ISM frequency band In this example we will explore this real world problem using a whip antenna The demonstration relies on WLAN and Bluetooth signals from a tablet phone or PC that you can control On or Off Instructions for the antenna 1 Keep the whip anten...

Страница 96: ...Instructions for the RSA306 1 Click the Preset button 2 Click the Display button Demo11 Steps1 2 1 2 Demo instructions 90 RSA306 Self Guided Demo ...

Страница 97: ...om the Available displays box 4 Click the Add button This will add the DPX icon to the Selected Displays box and remove it from the Available displays box 5 Click the OK button Demo11 Steps3 6 3 4 5 Demo instructions RSA306 Self Guided Demo 91 ...

Страница 98: ...tip below TIP 2 4 GHz WLAN channels There are 14 channels designated in the 2 4 GHz range 2400 2483 5 MHz spaced 5 MHz apart Channels 1 2412 MHz 6 2437 MHz and 11 2462 MHz are the most common channels to choose and most routers will use one of them as the default channel Demo11 Step6 6 Demo instructions 92 RSA306 Self Guided Demo ...

Страница 99: ...7 Select the Split view Demo11 Step7 7 8 Set the RefLev to 40 dBm Demo11 Step8 8 9 In the DPX display and click the settings button Demo11 Step9 9 Demo instructions RSA306 Self Guided Demo 93 ...

Страница 100: ...10 Under the Bitmap Scale tab set the Max scale to 3 for the DPX Spectrum Display Demo11 Step10 10 Demo instructions 94 RSA306 Self Guided Demo ...

Страница 101: ...11 Under the Ampl Scale tab set the Max color scale to 40 dBm for the DPXogram Display Demo11 Step11 11 Demo instructions RSA306 Self Guided Demo 95 ...

Страница 102: ...12 In the Traces tab set the Dot Persistence to Infinite Demo11 Step12 12 Demo instructions 96 RSA306 Self Guided Demo ...

Страница 103: ...et PC while monitoring with the setup above Check the DPX display to see if you can see the spectrum of the WLAN signals If no signal you can change the center frequency of the RSA306 to other channels Demo11 Step13 13 Demo instructions RSA306 Self Guided Demo 97 ...

Страница 104: ...cify a decay period that limits how long a point will be displayed In infinite persistence mode once a point in the display has been written to it will remain visible indefinitely We start with infinite persistence because it ensures that all transients are kept on screen Demo instructions 98 RSA306 Self Guided Demo ...

Страница 105: ...splay you can cause both uplink and downlink activity on your device by navigating to an internet speed testing webpage to test both the uploading and downloading speed and monitor the DPX display of the RSA306 at the same time Demo instructions RSA306 Self Guided Demo 99 ...

Страница 106: ...14 Turn the Bluetooth function Off then On in your smart phone tablet PC while monitoring with the setup above Demo11 Step14 14 Demo instructions 100 RSA306 Self Guided Demo ...

Страница 107: ...ou would like to examine Demo11 Step15 15 16 Right click the display and click Add markers twice to add two markers Then you can measure the distance between hops in frequency and time using the markers on the spectrogram Demo11 Step16 16 Demo instructions RSA306 Self Guided Demo 101 ...

Страница 108: ...ore distant network access point AP The smart phone tablet PC signal is nearly 30 dB stronger than the AP s signal because it is closer to the measurement antenna At the same screen you can also see the Bluetooth signals and even the measurements of the time and frequency intervals between those hop signals Demo instructions 102 RSA306 Self Guided Demo ...

Страница 109: ...Demo instructions RSA306 Self Guided Demo 103 ...

Страница 110: ...Demo instructions 104 RSA306 Self Guided Demo ...

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