TDA7546 Datasheet, PDF (64/68 Pages) STMicroelectronics – Multichip module for TMC tuner applications

Other functions detailed block diagrams
TDA7546
Table 50. Block diagram quality detection principle (without overdeviation correction)
Signal
LOW
HIGH
ac
ac+
sm
dev
dev+
inton
int80
No adjacent channel
No strong adjacent channel
Fieldstrength higher as softmute threshold
Deviation lower as threshold DWTH
Deviation lower as threshold DTH*DWTH
ISS filter off by logic (wide)
ISS filter 120KHz (mid)
Adjacent channel present
Adjacent channel higher as ac
Fieldstrength lower as softmute threshold
Deviation higher as threshold DWTH
Deviation higher as threshold DTH*DWTH
ISS filter on by logic
ISS filter 80KHz (narrow)
Input Signals
Mode1
Mode2
ac
ac+
sm
dev dev+ inton int80 Function inton int80 Function
0
0
0
0
0
0
0
wide
0
0
wide
0
0
0
1
0
0
0
wide
0
0
wide
0
0
0
1
1
0
0
wide
0
0
wide
0
0
1
0
0
1
1
narrow
1
1
narrow
0
0
1
1
0
0
0
wide
1
0
mid
0
0
1
1
1
0
0
wide
0
0
wide
1
0
0
0
0
1
1
narrow
1
0
mid
1
1
0
0
0
1
1
narrow
1
1
narrow
1
0
0
1
0
1
0
mid
1
0
mid
1
1
0
1
1
1
0
mid
1
1
narrow
1
0
1
0
0
1
1
narrow
1
1
narrow
1
1
1
0
0
1
1
narrow
1
1
narrow
1
0
1
1
0
1
0
mid
1
0
mid
1
1
1
1
0
1
0
mid
1
1
narrow
1
0
1
1
1
1
0
mid
1
0
mid
1
1
1
1
1
1
0
mid
1
1
narrow
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