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LA7642N Fiches technique(PDF) 2 Page - Sanyo Semicon Device |
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LA7642N Fiches technique(HTML) 2 Page - Sanyo Semicon Device |
2 / 6 page No. 5693-2/6 LA7642N Parameter Symbol Conditions Ratings Unit min typ max Referenced to 4.286 MHz. For reference only. EQU = off. Input a 20 mV p-p, f = 4.286 MHz CW signal Bell filter frequency characteristics BEL4.086 to pin 14 and, measure the pin 16 output –9 –6 –3 dB 4.086 MHz (f = 4.286 MHz). Next, input a CW of 20 mV p-p, f = 4.086 MHz and measure the pin 16 output (f = 4.086 MHz) and calculate the frequency characteristics. Referenced to 4.286 MHz. For reference only. EQU = off. Input a 20 mV p-p, f = 4.286 MHz CW signal Bell filter frequency characteristics BEL4.486 to pin 14 and, measure the pin 16 output –5 –2 –0.5 dB 4.486 MHz (f = 4.286 MHz). Next, input a CW of 20 mV p-p, f = 4.486 MHz and measure the pin 16 output (f = 4.486 MHz) and calculate the frequency characteristics. Referenced to 4.286 MHz. For reference only. EQU = on. Input a 20 mV p-p, f = 4.286 MHz CW signal EQU frequency characteristics EQU4.086 to pin 14 and, measure the pin 16 output –10.5 –7.5 –4.5 dB 4.086 MHz (f = 4.286 MHz). Next, input a CW of 20 mV p-p, f = 4.086 MHz and measure the pin 16 output (f = 4.086 MHz) and calculate the frequency characteristics. Referenced to 4.286 MHz. For reference only. EQU = on. Input a 20 mV p-p, f = 4.286 MHz CW signal EQU frequency characteristics EQU4.486 to pin 14 and measure the pin 16 output –3 0 +3 dB 4.486 MHz (f = 4.286 MHz). Next, input a CW of 20 mV p-p, f = 4.486 MHz and measure the pin 16 output (f = 4.486 MHz) and calculate the frequency characteristics. Referenced to 4.35 MHz. For reference only. EQU = off. Input a 20 mV p-p CW signal to pin 14 and Bell filter frequency deviation from BELF0 modify the frequency of that signal. Measure –50 0 +50 kHz center frequency the deviation from 4.35 MHz of the frequency (the center frequency) for which the pin 16 output is maximized. Referenced to 4.35 MHz. For reference only. Bell filter gain difference at f0 ±500 kHz BELdG EQU = off. –1 0 +1 dB Measure the gain at the BELF0 ±500 kHz, and calculate the difference. [Chrominance Block] Let 0 dB = 200 mV p-p. Input a color bar signal to pin 14 and gradually lower the input Killer operating point KILL signal level. Measure the input level at the –42 –36 –33 dB point the pin 13 DC voltage falls below 1/2* VCC. The pin 7 B-Y amplitude for a color bar signal. B-Y output amplitude VBY Let 0 dB = 200 mV p-p. Input a color bar 0.60 0.75 0.90 Vp-p signal (0 dB) to pin 14, and measure the B-Y amplitude at pin 7. The pin 6 R-Y amplitude for a color bar signal. R-Y output amplitude VRY Let 0 dB = 200 mV p-p. Input a color bar 0.74 0.92 1.10 Vp-p signal (0 dB) to pin 14, and measure the R-Y amplitude at pin 6. VRY/VBY. Calculate the ratio of the values R-Y/B-Y output ratio RATRB measured above. 1.1 1.23 1.35 RATRB = VRY/VBY Input a color bar signal (0 dB) to pin 14. In the pin 7 (B-Y) output waveform measure the amplitude of the blue (+230 kHz) and yellow B-Y linearity LINBY (–230 kHz) components (A) and measure the 85 100 115 % amplitude of the blue green (+78 kHz) and red (–78 kHz) components (B). Calculate the value of LINBY from the following formula. LINBY = (A/B) × (156/460) × 100 (%) Continued from preceding page. Continued on next page. |
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