Furuno FS-1570 - Page 131

5.3 T-CPU board (05P0732)
5-14
Table 5.3.3 Signals generated by DATA 1 on TX FIL Board
TX
FIL
Pin No.
& Name
Order of
execution
Signal name Function
U1 -
1-8
N.C Not used
U2 -
9-16
N.C Not used
#16 Q1 17 PA ON1, PA ON2
Turns on/off Power amplifier on
PA board
(FS-1570T: 05P0735; FS-2570T:
05P0739)
#15 Q2 18 DA ON
Turns on/off Driver on DRV board
(05P0738)
#14 Q3 19 N.C
#13 Q4 20 A
#12 Q5 21 B
#11 Q6 22 C
#10 Q7 23 INH 1
U4
#9 Q8 24 INH 2
Selects following check signals
connected to U5 and U6 in order
1) ALC, CHK, OUTVf, OUTVr,
INVf and INVr from TX FIL
(05P0736)
2) VC1, IC1 and TEMP1 from
PA (05P0735)
3) VC1, IC1, TEMP1, VC2, IC2
and TEMP2 from PA
(05P0739)
4) DA TEMP from DRV
(05P0738)
5) COMB CHK from COMB
(05P0740)
#16 Q1 17
17.0 to 25.5 MHz LPF
#15 Q2 18
11.0 to 17.0 MHz LPF
#14 Q3 19 7.0 to 11.0 MHz LPF
#13 Q4 20 5.0 to 7. 0 MHz LPF
#12 Q5 21 3.6 to 5.0 MHz LPF
#11 Q6 22 2.3 to 3.6 MHz LPF
#10 Q7 23
1.605 to 2.3 MHz LPF
Selects low pass filter on TX FIL
board (05P0736)
U3
#9
Q8 24
BK RL CONT
Switches 50 ohm BK relay, K15 on
TX FIL board (05P0736)