Bird-technologies VPM3 Manuel d'utilisateur

Virtual Power MeterOperators ManualModel VPM3©Copyright 2013 by Bird Electronic Corporation Instruction Book Part Number 920-VPM3 Rev. P1Windows and M

2Figure 1 VPM Compatible Sensors 7020 Power Sensor (WPS)Wide Band Power Sensor (WPS)Directional Power Sensor (DPS)Terminating Power Sensor (TPS)70

3Chapter 2 Set UpInstalling the VPM1. Insert installation CD. 2. Select Install Software when prompted.Note: Set-up will inspect the computer for any

48. Select the ‘Logging’ tab.9. Enter a folder local to the PC to store log file data. Note: This can be changed at any time in the Preferences. All

54. Click the ‘Install files for East Asian languages’ button. 5. Follow prompts.Note: For any language change the application, must be restarted.Not

6AdvancedChart History (points)Sets the number of points to be collected in a session.Playback History (frames)Sets the number of frames created durin

7Connecting a SensorNote: Refer to the individual power sensor manual for specific infor-mation regarding its sensor connections.

81. Connect a power sensor to the computers USB port with a USB cable.Note: Bird USB sensors are HID compliant devices and do not require any driver

9Figure 7 DPS Element OrientationConnecting the Wideband Power Sensor (WPS)1. Connect the Bird WPS to the a USB port on the PC using the sensor ca

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11Chapter 3 Average Power ModeDisplay TypesTypical functions are selecting the type of measurement, type of element, units of measure, measurement sca

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12Figure 8 VPM Screen, Power Display12345678Item Description1 Model of connected power sensor2 Softkey Labels3 Display Type4 Menu Label Keys5 Sens

13Meter DisplayProvides for a more traditional, analog-style view of main power display. The selected measurement type is displayed in the analog mete

14Chart DisplayUsed to display running time trace of all data collected by a sensor session or to review data saved to a log file.Note: Displaying th

15Show MarkersToggles markers on & off. See “Markers” on page 15.Show GridTurns major & minor grid on/offShow PointsToggles points on each da

16Axis ScalingRight click on Y or X axis to change scale from Auto to user-defined.Figure 13 Chart Display, Changing ScaleManual Axis ScalingChang

17Menu BarFileNew Sensor SessionDisplays sensor list and connection status dialog. Does not close the active sen-sor window/connection.OpenSession - D

18ModeNote: The Mode menu is only displayed if the sensor supports more than one measurement mode. For the 7022 sensor the following is dis-played.St

19SmoothingNote: The smoothing in this menu item is available only with the 7022 and is performed in the sensor itself. It only effects the average p

20UnitsPower - Toggles the power measurement between Watts and Decibels.Match - Allows selection of match measurement units.Note: This is dependent o

21DetailsWhen selected, it will display the details of the measurement.Fullscreen ModeToggles the display to full screen on and off.Display StyleChoos

About This ManualThis manual covers the operating and maintenance instructions for the follow-ing models:VPM3Changes to this ManualWe have made every

22HelpUser ManualOpens a html version of the user manual.About Virtual Power MeterDisplays version info about the VPM and any attached sensors.About S

231. Press the Input Offset soft key and use the key pad to enter the amount of attenuation then press the Enter key.2. Press the soft key to select A

24Figure 18 VPM, Configure, TPSFor Sensor 501443 Peak - Refer to the 5014 owner’s manual.DPM - Refer to the 5014 owner’s manual.1. Press the soft

25MeasurementNote: Specific measurement types depend upon the power sensor being used.Figure 20 VPM, Type, WPSFigure 21 VPM, Type, DPSForward

26MatchMatch measures the relation between forward and reflected average power. The health of the feedline and antenna systems can be monitored using

27Burst average power is calculated in the 7022 automatically using the average detector and the duty cycle.Burst average power can also be calculated

28CCDF measurements are most useful for pseudo-random signals, such as WCDMA, where a high CCDF means that the transmitter is being overdriven. CCDF c

29Figure 27 VPM, Units, TPSFigure 28 VPM, Units, DPSFileNote: Save and Save As captures the most recent measurement readings. It will not sto

30Save AsSame as Quick Save, only the program will request a title to save the trace under.Figure 29 VPM, FileEnable Enable LoggingSee “Logging” o

31Analyzing Logged DataThe simplest way to view logged data is to recall in VPM3. See “Chart Display” on page 14.Note: Only log files saved as .xml

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322. Create a graph of the forward and reflected average power as a function of time: a. Select row 1 by clicking on the row name.b. Select Delete, un

33Chapter 4 Time Domain ModeDisplayFigure 31 Screen Features, Time DomainItem Description1 Model of connected power sensor2 Lower Delta Marker3 Up

34Menu BarFileSee “File” on page 17.ModeSee “Mode” on page 18.ConfigureNote: This menu will change depending on the sensor being displayed. Input O

35Frequency SetpointSee “Frequency Setpoint” on page 19.Duty CycleSee “Duty Cycle” on page 19.MeasurementStart AcquisitionStarts a trace for the sel

36EdgeWhen the selected source is Internal, this selects the direction that the signal crosses the specified trigger level to cause a trigger event.Ch

37Chapter 5 Statistical Power ModeMost modern wireless communication systems employ complex modulation and channel access methods like orthogonal freq

38DisplayFigure 32 Screen Features, Statistical ModeItem Description1 Model of connected power sensor2 Lower Delta Marker3 Upper Delta Marker4 Men

39Statistical Power Measurement MethodologyComplementary Cumulative Distribution Function (CCDF)The most commonly used parameter is that of the Comple

40 Poor amplifier linearity caused by amplifier compression. This results in signal distortion and poor fidelity of transmitted waveforms. Antenna d

41Menu BarFileSee “File” on page 17.ModeSee “Mode” on page 18.ConfigureNote: This menu will change depending on the sensor being displayed. ScaleSp

xiiiTable of ContentsAbout This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iChanges to this Manual . .

42Figure 33 Confidence FactorMeasurementStart AcquisitionStarts a trace for the selected session.Stop AcquisitionHolds a trace until a started aga

43Chapter 6 Power SensorsAccuracyThe Bird power sensors are highly accurate. Accuracy is specified for each sensor type is typically given as a percen

44The root sum square (RSS) uncertainty is the industry standard method for com-bining independent uncertainties. To determine the TPS's RSS unce

45Example - If a source with a 1.50:1 VSWR with the Terminating Power Sensor was used, which has a max VSWR of 1.20:1, the mis-match uncertainty would

46Directional Power Sensor (DPS) MeasurementsDescriptionThe DPS series sensors utilize elements in order to make power measurements. Each element has

47Terminating Power Sensor (TPS)DescriptionThe Bird Terminating Power Sensor (TPS) and 5015-EF extended frequency TPS are a diode-based power sensors

48Wideband Power Sensor (WPS) MeasurementsNote: WPS Firmware V1.45 or latter is required to operate on the VPM3.DescriptionThe Bird Wideband Power Se

49Statistical Power Sensor (SPS) MeasurementsNote: WPS Firmware V1.45 or latter is required to operate on the VPM3.DescriptionThe Bird STAT Power Sen

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51Chapter 7 SpecificationsMinimum PC RequirementsOperating System Microsoft Windows 2000 with service pack 4Microsoft Windows XP and XP Professional w

xivFile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17New Sensor Session . . . .

52Appendix Error MessagesError Message Possible CorrectionInvalid device or device handleInvalid parameter (generic)Invalid address offset givenOpera

53CPU exception 19 : DTLB Protection WriteCPU exception 20 : DTLB ModifiedCPU exception 21 : ITLB MissCPU exception 22 : DTLB Miss ReadCPU exception 2

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59Limited WarrantyAll products manufactured by Seller are warranted to be free from defects in material and workmanship for a period of one year, unle

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xvFor Statistical Senors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Measurement . . . . . . . . . . . . . . .

xviChapter 5 Statistical Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Display . . . . . . . . . . . . . . . . . . . . . . . .

1Chapter 1 IntroductionPower measurements verify and monitor the condition of a transmitter system. To measure transmitter power, connect an external