U4935B Datasheet, PDF (5/16 Pages) TEMIC Semiconductors – SECAM Decoder

U4935B
Notes:
1. CVBS input: 100/75 color bar signal. The (B–Y) burst signal [f_OB] amplitude is 167 mVpp (= 0 dB).
2. Measure during scanning. An active probe is recommended for low capacitive loading.
3. Defined as V_LIN = b / a (see figure 4).
4.
Measure
DV_RB =
the difference between
V₂ - V₁ (Pin 9), DV_BB
the blanking (V₁) and
= V₂ - V₁ (Pin 10)
the
black
level
(V₂)
(see
figure
5).
96 11719
ab
Figure 4. V_LIN
V2 _V1
96 11720
Figure 5. Black level error at Pin 9 (R–Y)
5. The external voltage at Pin 1 should exceed 0.5 V.
6. V_K (peak-to-peak value of the burst signal in a blue line) when “LOW” (0.2 V) at Pin 5 related to 167 mV_PP ( = 0 dB)
I / K = 20 log₁₀ (V_K / 167 m V) [dB]
7. Measured in the burst period of a blue line
8. The reference frequency should be stable during the vertical blanking
9. Defined as the time from rising edge of the sandxastle burst-gate pulse at Pin 15.
10. Defined as the time from falling edge of the sandxastle burst-gate pulse at Pin 15.
TELEFUNKEN Semiconductors
5 (16)
Rev. A1, 28-Jan-97
Preliminary Information