Furuno FS-1575 Service Manual page 569

48. Tx power reduced. Natural tune [CANCEL]: Stop alarm
A warning alarm sound goes off. It goes off when natural tune occurs. At this time,
TX output power automatically reduces until it falls below the threshold. The term
"natural tune" means that antenna current flows at a level higher than the specified
level, i.e., the impedance of the antenna is exceedingly low.
The condition for stopping this alarm sound is that the [CANCEL] key is pressed.
Antenna current is 8A at a transmission frequency of not less than 6 MHz.
Antenna current is 9A at a transmission frequency of less than 6 MHz.
49. Tx power reduced. Ship's main failure [CANCEL]: Stop alarm
A warning alarm sound goes off. It goes off when the Main source switches to the
Reserve source and the TX output power has been automatically reduced. The
condition for stopping this alarm sound is that the [CANCEL] key is pressed.
50. TUNE NG [CANCEL]:Stop alarm
A warning alarm sound goes off. It goes off when the ATU causes a tune error.
The condition for stopping this alarm sound is that the [CANCEL] key is pressed.
51. VC error! Please power off [CANCEL]:Stop alarm
A warning alarm sound goes off. It goes off when, with the FS-2575 and FS-5075
systems, PA VC lower than 35V continues for a period of three seconds or more.
The condition for stopping this alarm sound is that the [CANCEL] key is pressed
or VC exceeds the threshold.
With the FS-1575 system, the warning alarm sound goes off when PA VC lower
than 18V continues for a period of three seconds or more.
52. INTERCOM calling [CANCEL]: Cancel call
An extension call Ring-back tone goes off. It goes off when one control unit is
calling the other control unit using the extension call function.
The condition for stopping this Ring-back tone is that the [CANCEL] key is
pressed.
53. INTERCOM incoming Pick up HANDSET: Connect
An extension call Ring-back tone goes off. It goes off when one control unit is
receiving an extension call from the other control unit. The condition for stopping
this Ring-back tone is that the [CANCEL] key is pressed.
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
AP2-7
Appendix 2. Message List
[CANCEL]: Reject