Icom IC-R75 Instruction Manual
Also see for IC-R75: Price listInstruction manualInstruction manualService manual
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Contents
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155RECEIVE FUNCTIONS Twin PBT operationThe twin PBT (Passband Tuning) function electroni-cally narrows the IF passband widths to reduce inter-ference. Moving both [TWIN PBT] controls to thesame position shifts the IF.Variable range depends on the filter selection. ±1.29kHz in 15 Hz steps and ±258 kHz in 3 Hz steps areavailable.PBT OPERATION EXAMPLE• [TWIN PBT] should normally be set to the centerpositions when there is no interference.• When PBT is used, the audio tone may bechanged.• PBT may not function with some IF filter combina-tions.• Not available for FM mode.TWIN PBT TWIN PBTTWIN PBTIF center frequency Interference Desired signalPassbandBoth controls atcenter positionCutting a lowerpassbandCutting both higher andlower passbandsInterference InterferenceDesired signalPassband Noise blankerThe noise blanker eliminates pulse-type noise suchas from car ignitions. The noise blanker is not avail-able for FM mode.➥ Push the [NB] switch to turn the noise blanker ONor OFF.• When using the noise blanker, received signalsmay be distorted if they are excessively strong.• The noise blanker function in AM mode can bedeactivated depending on set mode setting. (p.31)[NB] |
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