Furuno FS-1503, Service Manual

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13. 9921 (THRU signal)
⋅
0: Limited: RX signal does not pass through tuning circuit:
1) When TX and RX frequencies on MF are different.
2) When TX and RX band on HF are different.(frequency sepa-
ration of more than 1.2 MHz)
3) At scan/sweep reception
⋅
1: RX: RX signal does not passe through tuning circuit during reception.
14. 9922 (Meter Indication)
⋅
0: IA: The meter indicates antenna current (IA).
(The IA cannot be selected on the standard type.)
⋅
1: RF: The meter indicates RF output level.
15. 9924 (Remote Signal Format)
⋅
0: MIF: Furuno radio interface. Selected when Furuno DSC or NBDP
terminal is connected.
⋅
1: TBUS: For equipment made by "Thrane & Thrane A/S" of Denmark.
16. 9951 (Scan Stop Signal Level)
⋅
0: SQ Level: Scan stops when the squelch opens.
⋅
1 to 9: Scan stops when receiving signal level is higher than the preset
level.
17. 9955 (Squelch Activation)
⋅
0: Freq.: The squelch opens when the receiving signal is lower than the
preset value (9958).
⋅
1: Level: The squelch opens when the S-meter is higher than the preset
value (9956).
⋅
2: AND: The squelch opens when both frequency and level are satisfied.
⋅
3: OR: The squelch opens when either frequency or level is satisfied.
18. 9958 (Squelch Activating Frequency)
If a detected signal is lower than the preset one, it is recognized as audio signal, if
higher, it is noise.