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LA1193M Arkusz danych(PDF) 10 Page - Sanyo Semicon Device |
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LA1193M Arkusz danych(HTML) 10 Page - Sanyo Semicon Device |
10 / 21 page 3D-AGC Features 3D-AGC Sensitivity, ∆f and V20 Characteristics Figure 3 3D-AGC Sensitivity, ∆f and V20 Characteristics — The W-AGC sensitivity is determined by the antenna RF circuit selectivity independently of V20. — The N-AGC sensitivity is determined by the antenna, RF and mixer circuit total selectivity when V20 is 0.6 V or greater. It is determined by that selectivity and V20 when V20 is over 0.6 V. — The improvement in two-signal sensitivity suppression is the shaded area in the total AGC sensitivity and corresponds to the section occupied by the N-AGC. No. 4715-10/21 LA1193M, 1193V Feature Merit The narrow AGC sensitivity, which operates for ∆f of less than 1.5 MHz, is controlled independently according to the field strength of the desired station. The narrow AGC sensitivity is controlled at V20 values under 2 V. The wide AGC operates even when V20 is zero, i.e., when the desired station does not exist. The N-AGC and the W-AGC sensitivities can be set independently. The system has two AGC systems, the N-AGC and the W-AGC. • This is effective as a measure for mitigating two signal sensitivity suppression. • This allows two signal sensitivity suppression to be mitigated without deterioration in the three signal characteristics. • This allows the prevention of incorrect stopping on intermodulation signals during search. • This allows the prevention of intermodulation occurring in the antenna and RF modulation circuits in the presence of strong interfering stations. Prevention of blocking oscillation due to AGC operation is also possible. • This allows optimal settings to match the reception field conditions. • Since the narrow AGC operates at the desired station and at adjacent stations, it is possible to reduce the wide AGC sensitivity. This prevents incorrect AGC operation due to local oscillator injection. |
Podobny numer części - LA1193M |
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Podobny opis - LA1193M |
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