Furuno FS-1503 Service Manual page 57

13. 9921 (THRU signal)
⋅ 0: Limited:
⋅ 1: RX:
14. 9922 (Meter Indication)
⋅ 0: IA:
⋅ 1: RF:
15. 9924 (Remote Signal Format)
⋅ 0: MIF:
⋅ 1: TBUS:
16. 9951 (Scan Stop Signal Level)
⋅ 0: SQ Level:
⋅ 1 to 9:
17. 9955 (Squelch Activation)
⋅ 0: Freq.:
⋅ 1: Level:
⋅ 2: AND:
⋅ 3: OR:
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.
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
RX signal does not passe through tuning circuit during reception.
The meter indicates antenna current (IA).
(The IA cannot be selected on the standard type.)
The meter indicates RF output level.
Furuno radio interface. Selected when Furuno DSC or NBDP
terminal is connected.
For equipment made by "Thrane & Thrane A/S" of Denmark.
Scan stops when the squelch opens.
Scan stops when receiving signal level is higher than the preset
level.
The squelch opens when the receiving signal is lower than the
preset value (9958).
The squelch opens when the S-meter is higher than the preset
value (9956).
The squelch opens when both frequency and level are satisfied.
The squelch opens when either frequency or level is satisfied.
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