Furuno FS-1562-25, FS-1562-15 Frequency Scan, Squelch control, Noise blanker NB, Channel scan

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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) level. To switch the squelch function ON, press the [5] SQUELCH 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 notwithstanding a possible increase of background noise. To do this, press the [5] SQ switch again. Make sure the label “SQ” goes off.

Noise blanker (NB):

Always in circuit. This function is to clip off inputs noise resulting from an engine ignition or motor brush sparks.

1.11 Frequency Scan

Channel scan:

Scan is the function where the receiver watches 10/group custom or ITU channels in succession at predetermined intervals. The scan-stop signal level and scan-stop time can be changed on system codes 9951 and 9952, respectively. Prior to the use of the scan function, turn AGC on.

1. Recall Custom or ITU channel

Custom channels

Custom channels are divided into 20 groups in the scan mode as below.


	Scan Group	Custom Channel No.
	1	1 to 10
	2	11 to 20
	3	21 to 30
	4	31 to 40
	5	41 to 50
	6	51 to 60
	7	61 to 70
	8	71 to 80
	9	81 to 90
	10	91 to 100
	11	101 to 110
	12	111 to 120
	13	121 to 130
	14	131 to 140
	15	141 to 150
	16	151 to 160
	17	161 to 170
	18	171 to 180
	19	181 to 190
	20	191 to 200

-1.15-

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Contents Page T 9 9 Safety Instructions Do not disassemble or modify the equipment List of Contents Introduction FeaturesGeneral Specifications of MF/HF Radiotelephone model FS-1562Receiver Operation Keys Front View of Transceiver UnitRotary controls Page Fuses Power Supply UnitAC and DC power switches Selecting Frequency Starting operationYES TX Freq Standard type Netherlands type Special typeJ3E Direct frequency entryITU telephony channels SSB Custom channelsITU Telex channels Transmitting Tuning the antennaUsing the handset Monitoring transceiver output powerDistress Call on 2182 kHz Reducing transmitter powerDistress calls and Distress message Distress frequenciesDSC Distress Calling Event of Antenna Coupler FailureReceiving Channel scan Frequency ScanSquelch control Noise blanker NBITU channels Frequency SweepTelex Communication Optional DevicesRemote Station IntercomSetting Page Page This page is intentionally left blank Weekly Checks Diagnostic TestTesting the transmitter with a dummy antenna Page LCD/Keyboard Test & ROM Version No. Confirmation Competent technicians only Antenna Coupler TestMaintenance Page Troubleshooting List For qualified personnel only TroubleshootingTrouble Probable Cause Remedy Replacing Fuses Error IndicationThis page is intentionally left blank Appendix MF band working carrier frequencies ref. US CFR 47 Part CH no MF band SSB working carrier frequenciesFollowing frequencies are factory programmed MHz ITU SSB carrier frequencies ITU RR AppendixAP.5 12/16 MHz ITU SSB carrier frequencies ITU RR Appendix AP.7 MF Band Telex Frequency Table Telex ChannelsITU RR Appendix MHz Band ITU Nbdp Telex Frequency TableAP.10 AP.11 12/16 MHz Band ITU Nbdp Telex Frequency Table AP.13 18/19 MHz Band ITU Nbdp Telex Frequency Table AP.15 22, 25/26 MHz Band ITU Nbdp Telex Frequency Table