Furuno FS-1562 Manual page 372

DEMOD
Parts No. Check Item
CR1 Input level of AD
converter
CR2 Status of DEMOD
DSP
CR3
CR4 Communication
mode assigned by
CR5
SYS CPU to
CR6
DEMOD DSP
CR7 DEMOD DSP status
CR8
CR9 Selection of input
signal to AD
converter
SYNC
Parts No.
CR10 Status of SYNC DSP On/off: Waiting Frame Bit and Unique Word
CR11
CR13 Communication
mode assigned by
CR15
SYS CPU to SYNC
CR17
DSP
CR19 DEMOD DSP status
CR21 Frame sync signal
DECODE
Parts No.
CR12 Communication
CR14 mode assigned by
SYS CPU to SYNC
CR16
DSP
CR18 DECODE reset
When the AD converter U49 is in saturation or when TP54
is 2 Vpp or more, the LED comes on.
On/off: Waiting signal; off/on: Fast Fourier Transforming;
on/on: Tracking signal
On/off/off: BPSK; on/on/off: Voice; off/on/off: 9.6k FIU; and
off/off/on: HSD
When DEMOD DSP runs, CR7 blinks.
Not used
On: At communication other than HSD
Off: At HSD communication (Input to AD converter is 1.5
times higher in level than other communications.)
Item
Off/on: Acquiring FB twice or losing FB twice
On/on: Synchronized
On/off/off: BPSK; on/on/off: Voice; off/on/off: 9.6k FIU;
and off/off/on: HSD
When SYNC DSP runs, CR7 blinks.
After frame synchronization, CR21 toggles on and off
every time frame bit signal is received.
Item
On/off/off: BPSK; on/on/off: Voice; off/on/off: 9.6k FIU;
and off/off/on: HSD
Every time DECODE DSP is reset, CR18 toggles on and
off.
H3-43
Remarks
Remarks
Remarks
FELCOM 82