Narda 8718B User Manual

USER'S GUIDEModel 8718BElectromagneticRadiationSurvey MeterP/N 42983600 RevBnardaSafety Test Solutionsan communications companyL3

9Chapter 3 Probe SelectionIntroductionThe 8700 series RF measurement system offers a very broadselection of probes. The factors that you should consid

99Chapter 17 Operation with a Data Recorder17Operation with a Data RecorderDescriptionThe Model 8718B provides an output signal that can beconnected t

100 Operating the MeterField Strength Recorder Voltage Bar Graph0.01 mW/cm20.03 volts 1 % of Full Scale0.50 mW/cm21.50 volts Half Scale1.00 mW/cm23.00

101Chapter 18 User's Software18User’s SoftwareDescriptionThe 8718B User’s Software is a Windows™ - based program thatperforms three basic functio

102 Operating the MeterInstalling the User’s SoftwareTo set up the program...1. Turn on the computer and start Microsoft Windows(type WIN) at the DOS

103Chapter 18 User's SoftwareMain Menu Screen

104 Operating the MeterTo establish communications between the meter and thecomputer...1. Use the supplied computer cable to connect betweenthe RS232

105Chapter 18 User's SoftwareYou can have a maximum of six probes installed at any time.Since the serial number of the probe is identified as wel

106 Operating the MeterInstalling a ProbeYou may have a maximum of six probes installed in the 8718B atany time. If you have six probes installed and

107Chapter 18 User's SoftwareProbe Installation Screen

Operating the Meter1087. Enter any special calibration frequencies on the extralines provided and enter the appropriate calibrationfactors. Delete any

10 Operating the MeterFlat response probes are the most common. Narda’s patentedshaped frequency response probes read out in Percent ofStandard and ar

109Chapter 18 User's SoftwareDownloading Logged Data from the MeterTo download data from the meter...1. Establish communications between the mete

110 Operating the MeterThree sample files were loaded on your hard drive wheninstalled the User’s Software. There is a sample for each of thethree mod

111Chapter 18 User's SoftwareLogged Survey Data Screen

112 Operating the Meterd) The fourth line shows the Run Ref. Number that wasentered by the user at the beginning of the survey, theRecord number and t

113Chapter 18 User's Softwaref) The up and down keys to the right of Increment orDecrement By are used to determine how manyrecords you advance o

114 Operating the MeterExporting DataTo export a logged data file for use in a spreadsheetprogram...1. Select Make Spreadsheet (.csv) File from the Ex

115Chapter 18 User's SoftwareData menu. A dialog box will appear titled RestoreSurvey Data. It will ask to confirm that you want toclear the surv

116 Operating the MeterTo update the meter’s firmware …1. Turn your meter on. Observe the firmware versionnumber, which is displayed briefly about thr

117Appendix A Communications with a ComputerACommunications with a ComputerApplicationThe Model 8718B can be connected to a computer for real timetran

118 Appendices>A000CSCR>C000CSCR>Dr00CSCR>E003XXXCSCR>F0r4XXXXCSCR>H000CSCR>P000CSCR>L000CSCR>V000CSCR>X000CSCRAUTO ZERO

11Chapter 3 Probe SelectionThe readout on the 8718B is shown in terms of Percent ofStandard. The full scale of Narda’s shaped probes is typicallyeithe

119Appendix A Communications with a Computer>A000CSCR>A000D1CR3E 41 30 30 30 44 31 0D>C000CSCR>C000D3CR3E 43 30 30 30 44 33 0DS= seconds i

120 AppendicesRead MaxASCIIHexReset MaxASCIIHexDisplay AveragingASCIIHexRead CalibratedProbe DataASCIIHexRead Log DataASCIIHexRead Header(setup data)A

121Appendix B Theory of OperationBTheory of OperationOverall Functional DescriptionThe meter is a portable, battery-operated instrument that formsa co

122 AppendicesThe meter also contains built-in self-testing facilities forchecking the condition of the batteries, the operation of theprobe and for z

123Appendix B Theory of OperationModel8718BFunctionalBlockDiagram

124 AppendicesCalibration is performed using the RS-232 port, a voltagesource and a computer.PCB A1 is the primary circuit board within the meter. The

125Appendix B Theory of OperationThe LCD is a self-contained display and meter circuit assembly.The display has four lines with twenty characters per

126 AppendicesThe 872xD series probes operate from 300 MHz to >50 GHz.They contain resistive thermocouples distributed along thelength of the dipol

127Appendix B Theory of OperationThis provides for the independence of probe orientation relativeto the polarization of the field. The instantaneous c

128 Appendices

12 Operating the MeterProbe IdentificationNarda 8700D series probes use the followinglabels and indicators:•Certified Calibration Date Label•Model Ide

129Appendix C MaintenanceGeneralThe Model 8718B requires very little maintenance. No operatoradjustments are required. The electronic circuitry is con

130 AppendicesDescriptionModel orPart NumberCommentsBattery Charger, 115 volt 84156000Battery Charger, 230 volt 84156001Power Cord89707000 to89707008S

131Appendix C MaintenanceRechargeable Battery Management ProgramThe Model 8718B contains a rechargeable nickel-cadmiumbattery that must be recycled or

132 Appendices

133IndexAudio AlarmAlarm Description 4, 67Controlling Alarm Function 67Fixed Alarm 68Variable Tone Alarm 69Back Light 75Bar Graph 23BatteryAccuracy of

134 IndexProbe TestSources 4Testing the Probe 23Probe ZeroCauses of Zero Drift 82Checking for Zero Drift 82Establishing a Zero Field 83Shielding the P

Narda Safety Test Solutions (Narda STS) warrants eachproduct of its manufacture to be free from any defect inmaterial and workmanship for a period of

USA: 435 Moreland Road Hauppauge, NY 11788Tel 1-631 231-1700 Fax 1-631 231-1711E-Mail [email protected] www.narda-sts.comGERMANY: Sandwiesenst

13Chapter 4 Making a Measurement4Making a MeasurementSee Chapter 5,Using the MenuSystem, for detailson features andoperation.IntroductionThis chapter

14 Operating the MeterEntering the Probe ModelNarda's 8700 Series system is completely modular — all 8700series meters work with all 8700 series

15Chapter 4 Making a MeasurementTo select from the PROBES IN MEMORY...1. If you haven’t already, press F1 (MEASURE).2. The model number and the serial

16 Operating the MeterTo use a PROBE that is NOT IN MEMORY...1. If you haven't already, press F1 (MEASURE).2. The model number of the last probe

17Chapter 4 Making a MeasurementZeroing the ProbeThe probe and meter must be “zeroed” together. It is importantthat the probe is not exposed to radiat

18 Operating the Meter•The field strength is not low enough. Move away fromthe RF field source, use the storage case to zero theprobe.•The probe is da

1Chapter 1 Introduction1IntroductionAbout the Model 8718BYour Model 8718B is a hand-held, battery-poweredmeter designed to simplify the measurement of

19Chapter 4 Making a MeasurementMain Measurement Display Screen(Shaped Probes)12.1 % STD27.5 MAX CF 1.00ALT MAXR MENU FREQF1 F2 F3 F4FIELD STRENGTH•In

20 Operating the MeterAlternate Measurement Display ScreenThe Alternate Measurement Display Screen is very similar to theMain Measurement Display Scre

21Chapter 4 Making a MeasurementAlternate Measurement Display Screen(Shaped Probes)FIELD STRENGTH•Indicates actualmeasured value•Unit of measure can b

22 Operating the Meter4. Change the units (if needed) by pressing eitherF1 (kHz), F2 (MHz), or F3 (GHz).5. Press F4 (SAVE). The probe correction facto

23Chapter 4 Making a MeasurementBar Graph RangesThe Range key is used to control how the bar graph displaysinformation. The digital display is not aff

24 Operating the Meterget a deflection on the bar graph but the amount of deflection isnot important. Repeat for the other two test points to insure t

25Chapter 4 Making a Measurement•When there are multiple emitters with frequencies thatare close to each other and the nearest calibrationfrequencies

26 Operating the MeterTo use a correction factor for a probe NOT in memory...1. Press F3 (MENU). The First Menu Screen will appear.2. Press 8 (NEXT) t

27Chapter 4 Making a MeasurementMeasurement UncertaintyThe uncertainty of any measurement includes several factorsrelated to the probe and meter.•Freq

28 Operating the MeterMaking a MeasurementRefer to the Applications Booklet for both general and specificinformation on making measurements.Precaution

2 Operating the MeterUser’s Guide UpdatesThis User’s Guide was thoroughly reviewed for accuracy prior topublication. Corrections to this guide necessi

29Chapter 5 Using the Menu System5Using the Menu SystemGeneralThe menu system allows you to store data and to select variousoperating modes. It is acc

30 Operating the Meter1DATALOG 5UNITS2 TIME AVG 6 RS2323 SPAT I AL 7 PROBE4 BAT / L I FE 8 NEXTF1 F2 F3 F4Key Menu Options Chapter1DATA LOGLog with ti

31Chapter 5 Using the Menu SystemSecond Menu Screen1COR AFCT 5ALARM2SETTNIGS 6STNDS3CABLE/FO 7BLANK4LOCKOUT 8BACKF1 F2 F3 F4Key Menu Options Chapter1C

32 Operating the MeterMenu CommandsThe following is a list of menu commands that are shown on thefourth line of the display and selected by using the

33Chapter 5 Using the Menu SystemMAIN Main – switch to the Main Measurement DisplayScreen.MAXR Maximum Reset - reset the maximum value tothe instantan

34 Operating the MeterDefault Conditions Upon Turn-OnThe Model 8718B is designed to automatically return to a basicset of operating parameters every t

35Chapter 5 Using the Menu SystemTime Averaging OFFUnit of Measure Last Used unit of measure will be in useif previous and current probe both haveflat

36 Operating the Meter

37Chapter 6 Units of Measure6Units of MeasureAvailable Units of MeasureThe 8718B Meter allows you to quickly select any unit ofmeasure that is appropr

38 Operating the MeterChanging the Unit of MeasureTo change the unit of measure that the meter is set for ...1. Access the menu system by pressing the

3Chapter 2 Understanding Your Model 8718B2Understanding Your Model 8718BGeneral DescriptionIt is important to be familiar with the Model 8718B beforey

39Chapter 7 Spatially-Averaged MeasurementsSpatially Averaged Measurements7Understanding Spatial AveragingThe major standards concerned with human exp

40 Operating the MeterSpatial Averaging with the 8718BThe Model 8718B uses time to quickly make precise, spatiallyaveraged measurements. With the 8718

41Chapter 7 Spatially-Averaged Measurements6. Press F1 (START) while slowly moving the probevertically at a constant rate of movement.7. Strive for an

42 Operating the Meter10. To make another spatially averaged measurement,press F1 (START) again.11. To temporarily suspend the spatial average mode an

43Chapter 8 Data Logging8Data LoggingLogging OptionsThe 8718B Meter features several methods of collecting data.The basic choices are:•Logging Data wi

44 Operating the Meter•Collect a series of up to 999 spatially-averaged datapoints, one at a time, and automatically assign areference number to each

45Chapter 8 Data LoggingTo initiate one of the three logging modes describedabove...1. Access the menu system by pressing the function keythat corresp

46 Operating the MeterMode 1 LoggingTo initiate Mode 1 logging (a series of data points with areference number assigned to each data point)...1. Press

47Chapter 8 Data Logging6. A screen will appear that indicates the value of readingthat has been temporarily stored in memory and thenumber of the dat

48 Operating the Meter13. Use the numeric keypad to enter a new two-digitsurvey number and then press F1 (OK)orENTER.Again, make note of this number s

4 Operating the MeterProbe ConnectionTo make measurements, you must use yourModel 8718B with a compatible probe. Connectthe cable of the probe to the

49Chapter 8 Data Logging3. Press F4 (QUIT)orF3 (MENU) if you change your mind.4. The meter will automatically return to the measurementscreen with new

50 Operating the MeterDATA POINT NO.00112. 1 % STD AVG27. 5 % STD MAXSAVE DI SCARDF1 F2 F3 F410. Press F1 (SAVE) to permanently log this data point in

51Chapter 8 Data Logging15. To end this logging run and begin a new run, press F3(END). The screen will appear that allows you to enteranother two-dig

52 Operating the Meter2. A screen will appear requesting that you assign a two-digit survey number to this logging run of data points.Use the numeric

53Chapter 8 Data Logging6. To log for a specific interval of time, enter a two-digitnumber on the keypad. If you make a mistake enteringa number, simp

54 Operating the MeterTo begin another logging run at a different rate or for adifferent duration...•Press F3 (MENU). Press the number 1 on the keypad

55Chapter 8 Data LoggingA record contains a header and one or more data points.To estimate the approximate number of data points andrecords (logging r

56 Operating the Meter7. To discard the contents of the meter’s memory once thecontents have been downloaded or without saving theinformation, access

57Chapter 9 Time-Averaged Measurements9Time-Averaged MeasurementsMeasurement OptionsThe 8718B meter features two averaging modes:•Perform fixed-time a

58 Operating the MeterMode 1 AveragingTo initiate Mode 1 averaging (fixed time averaging over anyone of several specific time intervals)...1. Press nu

5Chapter 2 Understanding Your Model 8718BStrap and Tripod MountA strap is provided on the underside of the Model8718B. It has a hook and loop closure

59Chapter 9 Time-Averaged Measurements5. The meter will continue to make real-timemeasurements until you initiate making the time-averaged measurement

60 Operating the Meter11. To make another time-averaged measurement over thesame interval, press F1 (START) again.12. To temporarily suspend the time

61Chapter 9 Time-Averaged MeasurementsThe PAUSE featurecan be useful whenmeasuring the aver-age value from cer-tain rotating radars.The effective mea-

62 Operating the MeterTo set the meter for a specific frequency...1. Press F4 (FREQ) from the measurement screen. Anew screen will appear to allow you

63Chapter 9 Time-Averaged MeasurementsTo initiate Mode 2 averaging (averaging to meet therequirements of a specific standard)...1. Make sure that the

64 Operating the Meter7. The meter will continue to make real timemeasurements until you initiate making the time-averaged measurement.8. Press F1 (ST

65Chapter 9 Time-Averaged Measurements13. To temporarily suspend the time average mode (oncethe current measurement interval has been completedor stop

66 Operating the MeterTo change the frequency...1. To change the frequency (once the currentmeasurement interval has been completed orstopped), press

67Chapter 10 Alarm Settings10Alarm SettingsAlarm DescriptionThe Model 8718B Meter is equipped with an audible alarm thatemits sound through a tiny hol

68 Operating the Meter4. The left side of the display gives the status of the fixedalarm. It indicates whether the fixed alarm is either onor off and

6 Operating the MeterKeypadThe Model 8718B has four groups of keys distinguished by theircolor.Function keys (green)Numeric keys (yellow)Special Funct

69Chapter 10 Alarm SettingsVariable Tone Alarm1. Use F3 (ON)orF4 (OFF) to change the status of thefixed alarm. The variable tone alarm constantlygener

70 Operating the Meter

71Chapter 11 Using the RF Exposure Standards Feature11Using The RF ExposureStandards FeatureApplicationThe Model 8718B Meter is always set to referenc

72 Operating the MeterMany standards havemore than one tier,i.e., IEEE C95.1-1999establishes differentMaximum Permissi-ble Exposure (MPE)levels and av

73Chapter 11 Using the RF Exposure Standards Feature9. Press F1 (OK) to begin using this standard as areference.10. Alternately, press F4 (STNDS) to s

74 Operating the Meter

75Chapter 12 Back Light and Battery Status12Back Light and Battery StatusApplication for Back LightThe liquid crystal display (LCD) on the Model 8718B

76 Operating the MeterBattery CapacityThe Model 8718B Meter uses a custom rechargeable battery.Under normal conditions, the battery provides about 20

77Chapter 12 Back Light and Battery Status4. Press the ESC key to return to the First Menu Screen.Press it again to return to the measurements screen.

78 Operating the Meter

7Chapter 2 Understanding Your Model 8718BNumeric KeypadUse the numeric keypad to enter number data into the Model8718B. You also use the numeric keypa

79Chapter 13 Keypad Lockout and Display Blanking13Keypad Lockout andDisplay BlankingDescriptionThe Lockout feature disables the keypad to prevent inad

80 Operating the MeterDisplay Blanking and Keypad LockoutTo both blank the display and lock the keypad...1. Access the menu system by pressing the fun

81Chapter 14 Probe Zero14Probe ZeroUnderstanding the Zero FunctionThe purpose of “zeroing” the probe and meter is to set the meterto indicate a zero f

82 Operating the MeterCauses of Zero DriftAll sensors have a change in output that is a function oftemperature. In a probe, it is both the thermal coe

83Chapter 14 Probe Zero•Whenever the meter continues to show low-level valuesand never seems to get back to a zero-field condition,positive zero drift

84 Operating the MeterShielding the ProbeThe probe must be shielded from significant RF fields wheneverit is zeroed with the meter. This is to establi

85Chapter 14 Probe ZeroZeroing the Probe While In UseThe meter and probe are initially zeroed before the meter isallowed to go into the measurement mo

86 Operating the Meter

87Chapter 15 Advanced Settings15Advanced SettingsDescriptionThe Settings menu is used to control several features of theModel 8718B that need to be ac

88 Operating the MeterSetting the ClockTo check and/or change the time and date...1. Access the settings menu by following the proceduredescribed in A

8 Operating the Meter

89Chapter 15 Advanced Settings4. Proceed to setting the date, if required.5. Alternately, press the Esc key to return to the FirstMenu Screen. Press E

90 Operating the Metercorrect for the temperature differential. The amount of error thatcan occur when the meter and probe are operating at differentt

91Chapter 15 Advanced Settings7. Once the correct probe temperature is displayed onthe screen, press F4 (SAVE). The meter willautomatically return to

92 Operating the MeterFunction Key PositionThe position of the commands for the function keys (F1-F4), asdescribed in this guide, is for right-hand op

93Chapter 15 Advanced Settings3. Press F1 (OK) to continue with the same settingwithout change. The meter will return to the First MenuScreen. Press E

94 Operating the Meter4. Press F4 (SET) to change the display contrast setting.The screen will change to show both the current settingand display an u

95Chapter 16 Operation with a Fiber Optic Link16Operation with a Fiber Optic LinkDescriptionNarda fiber optic link transmitters are compatible with al

96 Operating the MeterThe fiber optic link system also allows the meter and probe to beseparated by up to 50 meters. One application is surveyingtower

97Chapter 16 Operation with a Fiber Optic LinkTo set the meter to use the fiber optic receiver input...1. Access the menu system by pressing the funct

98 Operating the Meter8. Press F4 (CABLE) to change to the cable input. Themeter will return to the First Menu Screen. Press Esc toreturn to the measu