ITU R P 845:1997
ITU R P 845:1997 Hf Field Strenght Measurement
Table of Contents
ANNEX1...Measurementofsky-wavesignalintensitiesatfrequenciesabove1.6MHz
1Introduction
2Choiceofcircuitsandperiodsofoperation
3Transmitterandtransmittingantenna
4Receivingantenna,receiverandrecordingtechniques
5Calibrationmeasurements
6Conversionofmeasureddatatomeanavailablereceiverpower
andr.m.s.sky-wavefieldstrength
6.1Meanavailablereceiverpower
6.2R.m.s.sky-wavefieldstrength
6.3Preferredsignal-intensityparameterforcomparisonof
measureddatawithpredictions
7Data-tabulationprocedures
7.1Circuitandoperatingdetails
7.2Monthlytabulationsheetsofsignal-amplitudemeasurements
7.3Tabulationofdataforcomputerprocessing
ANNEX2...HFfield-strengthmeasurementtechniquef
Specificationsforafield-strengthmeasurement
campaignintendedfor...
1Introduction
2TheHFfield-strengthmeasurementcampaign
3Transmitter
3.1Transmitterlocations
3.2Transmitterpower
3.3Transmittingantennas
3.4Frequenciesandtransmitterschedules
3.5Thetransmittedsignal
3.6Log-keeping
4Receiver
4.1Receiverlocations
4.2Antennasandsiting
4.3Receiverspecificationsandcalibration
4.4Receivermeasurementsequence
4.5Recordingunitsandcalibration
5Signalandbackgroundnoisemeasurementanddataprocessing
5.1Sampling
5.2Inputattenuation
5.3Datarecording
5.4Determinationofmonthlymediansanddeciles
5.5Datanormalization
6Datahandling,qualityassuranceandtraining
APPENDIX1...Specificationsforaverticalantennaasa
fieldprobeforfield-strengthmeasurements
1Generaloutline
2Geometricalstructure
3Amplifierofactiveantenna
3.1Basicschematic
3.2Electriccharacteristicsofactiveantenna
4Antennacable
5Lightningprotection
APPENDIX2...Recordingofsignalandnoiseamplitudesand
relatedinformation
1Introduction
2Generaldataorganization
3Tables
3.1Receivertable
3.2Transmittertable
3.3Frequencytable
4Fileformats
4.1Generaldescriptionfile
4.2Calibrationfile
4.3Measurementsfile(foreachhourandcircuit)
5Diskettesorganization
6Storageconsiderations
7Remarks
APPENDIX3...Rulesfordetermininghourlymediansignal
amplitudes