Furuno FS-1503 manual Receiving AM broadcasting stations, Squelch control, Noise blanker NB

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Receiving AM broadcasting stations

1.Press the [MODE/1] key repeatedly to select H3E.

2.To tune in a 15,260 kHz shortwave station, for instance, press as below: [RX], [1], [5], [2], [6], [0], [0], [ENT]. Be sure to enter the last zero.

Squelch control

Squelch is used to mute the receiver audio output when the receiver input is less than a preset value or dominant noise is higher than a preset (1000 Hz) frequency. To switch the squelch function ON, press the [SQL/5] key. Make sure the label “SQ” appears on the display. To pick up a weak signal at high audio frequencies, you should remove the squelch function notwith- standing a possible increase of background noise. To do this, press the [SQL/5] key again. Make sure the label “SQ” goes off.

Noise blanker (NB)

The noise blanker clips inputs of noise resulting from an engine ignition or motor brush sparks. It can be enabled or disabled through the system settings.

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Contents Page Page Safety Instructions Table of Contents Introduction FeaturesOperation System ConfigurationRotary controls Transceiver Unit DescriptionKeys ALM IndicationsTurning the Squelch On/Off Turning the Power On/OffAdjusting the Backlighting Turning the Loudspeaker On/OffTurning AGC on/off Selecting FrequencyPaired Rx/Tx frequency Direct frequency entryRx frequency Tx frequencyJ3E User channelsSample displays of ITU telephony channel ITU telephony channels SSBTLX ITU Telex channelsDisplaying Station Name Tuning the antennaTransmitting Distress Call on 2182 kHz Using the microphoneMonitoring transceiver output power Reducing transmitter powerDistress calls and Distress message Distress frequenciesMeter Adjusting RF gainClarifier adjustment ReceivingSquelch control Receiving AM broadcasting stationsNoise blanker NB Channel scan Frequency ScanUser channels 12 Sample scan screen ITU channelsFrequency Sweep MIF commands applicable to the FS-1503 MIF CommandsTelex Communication Operation of Optional EquipmentFuruno Nbdp Terminal DP-5/DP-6 Communication on 2182 kHz Remote Station RB-500 requires optional Remote-B BoardIntercom PrioritySystem Setup Changing System SettingsCustomizing by User Scan/sweep-stop signal level Writing User Channels Weekly Checks MaintenanceAural testing Testing the transmitter with a dummy antennaSequence of diagnostic test Diagnostic TestKey and corresponding indication LCD/Keyboard Test & ROM Version No. ConfirmationMaintenance MaintenanceMaintenance con’t Troubleshooting List TroubleshootingTroubleshooting list con’t Replacing Fuses Errow IndicationGeneral SpecificationsAntenna Coupler Custom CHANNELS/FREQUENCIES AppendixMF band working carrier frequencies ref. US CFR 47 Part CH no MF band SSB working carrier frequenciesITU CH no MHz ITU SSB carrier frequencies ITU RR AppendixFollowing frequencies are factory programmed 12/16 MHz ITU SSB carrier frequencies ITU RR Appendix CH no Ship RX Ship TX MF Band Telex Frequency Table Telex ChannelsITU RR Appendix MHz Band ITU Nbdp Telex Frequency Table8001 12001 12/16 MHz Band ITU Nbdp Telex Frequency Table 16111 CH NO. Ship RX Ship TX 18/19 MHz Band ITU Nbdp Telex Frequency Table22001 22, 25/26 MHz Band ITU Nbdp Telex Frequency Table Index

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