TDA7407_07 Datasheet, PDF (16/46 Pages) STMicroelectronics – Advanced car signal processor

Stereo decoder part
TDA7407
3.1
Notes to the characteristics:
1. Intermodulation suppression:
α2
=
----^V----^O----⁽--^s---ⁱ--^g---ⁿ---^a---^l--⁾--⁽--^a---^t--¹---^k---^H----^z---⁾---
V_{O(spurious)(at1kHz)}
;
f_s
=
(2
x
10kHz)
-
19kHz
α3
=
----^V----^O----⁽--^s---ⁱ--^g---ⁿ---^a---^l--⁾--⁽--^a---^t--¹---^k---^H----^z---⁾---
V_{O(spurious)(at1kHz)}
;
f_s
=
(3
x
13kHz)
-
38kHz
measured with: 91% pilot signal; fm = 10kHz or 13kHz.
2. Traffic radio (V.F.) suppression: measured with: 91% stereo signal;
9% pilot signal; fm = 1kHz; 5% subcarrier (f = 57kHz, fm = 23Hz AM, m = 60%)
α57(V.W > F.) = --------------^V----^O-----⁽--^s--ⁱ--^g---ⁿ---^a----^l-⁾--⁽--^a---^t--¹---^k---^H----^z---⁾--------------
V_{O(spurious)(at1kHz ± 23kHz)}
3. SCA (Subsidiary Communications Authorization) measured with: 81% mono signal;
9% pilot signal; fm = 1kHz; 10% SCA - subcarrier (fs = 67kHz, unmodulated).
α67
=
----^V----^O----⁽--^s---ⁱ--^g---ⁿ---^a---^l--⁾--⁽--^a---^t--¹---^k---^H----^z---⁾---
V_{O(spurious)(at9kHz)}
;
F_s
=(2
x
38kHz)
-
67kHz
4. ACI (Adjacent Channel Interference):
α114
=
----^V----^O----⁽--^s---ⁱ--^g---ⁿ---^a---^l--⁾--⁽--^a---^t--¹---^k---^H----^z---⁾--- ;
V_{O(spurious)(at4kHz)}
F_s =
110kHz
-
(3 x
38kHz)
α114
=
----^V----^O----⁽--^s---ⁱ--^g---ⁿ---^a---^l--⁾--⁽--^a---^t--¹---^k---^H----^z---⁾--- ;
V_{O(spurious)(at4kHz)}
F_s =
186kHz
-
(5 x
38kHz)
measured with: 90% mono signal; 9% pilot signal; fm =1kHz; 1% spurious signal
(fs = 110kHz or 186kHz, unmodulated).
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