ITU O.111:1988
ITU O.111:1988 Frequency Shift Measuring Equipment For Use On Carrier Channels
Table of Contents
1General2Principleofoperation
3Transmittingequipment
3.1Frequencies
3.2Level
3.3Outputimpedance(frequencyrange300Hzto4kHz)
4Receivingequipment
4.1Measuringranges
4.2Measuringaccuracy
4.5Inputlevel
4.6Inputimpedance
4.7Inputfrequency
4.8Leveldifference
4.9Recorderoutput
4.10Noiseimmunity
5Operatingenvironment
ANNEXA-Methodformeasuringthefrequencyshift
introducedbyacarrierchannel