Furuno FS-1570 Service Manual page 16

7. Noise and interference check list
Following checks are made in all bands to make sure that no interference to and from
the radiotelephone is observed.
During transmission (voice and TLX), check that;
The distress alert and the incoming indicator are not interfered.
*LED brightness does not change and the buzzer sounds without noise.
*The unit is not activated.
The brightness of emergency and ordinary lights is not changed.
The head of printer does not move.
The Inmarsat B is not interfered.
*The antenna does not move.
*No change is observed in the status display.
*No noise is heard from TELs, Handset and FAX.
No noise is heard from on VHF.
No change is observed in the radar display.
No noise is heard from public addressor.
No interference to speed log, depth sounder, steering gear, navigational aids and
etc.
*Check for normal indication and functions.
No interference to the display and the indicator in the navigational panel and etc.
* Check for normal indication and functions.
The TX signal is not heard from own handset speaker of the radiotelephone.
During reception, check that;
No noise is heard from the radiotelephone during the charge of the battery.
No noise is heard from the radiotelephone during the reception of NMEA data.
During VHF transmission, no noise is heard from the radiotelephone.
During radar transmission, no noise is heard from the radiotelephone.
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Check List
Result
Result