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FM1236/HM Datasheet(PDF) 12 Page - NXP Semiconductors |
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FM1236/HM Datasheet(HTML) 12 Page - NXP Semiconductors |
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12 / 20 page  1997 Feb 03 12 Philips Components Preliminary specification Desktop video & FM radio module system M, N FM1236 Video and audio characteristics (see Fig.2) Digital AFC status ADC word at I2C-bus during read operation PARAMETER TEST SIGNAL TEST POINT MIN. TYP. MAX. UNIT CVBS characteristics: video amplitude signal at pin 23 A1 (peak-to-peak value) BU4 0.75 0.95 1.15 V DC level sync pulse at pin 23 A1 BU4 − 0.35 − V Video amplitude drop with respect to modulation 1 MHz at Tamb =45 °C: at 2 MHz A1 BU4 −1.5 −+1.0 dB at 3 MHz A1 BU4 −2.5 −+1.5 dB at 3.58 MHz A1 BU4 −4.0 −+2.0 dB Sound carrier rejection A1 (1 MHz) + B1 BU4 40 −− dB Residual 47.25 MHz signal in video channel: level of 1.5 MHz A1 + B3 BU4 −− 68 dB µV Residual 91.5 MHz signal in video channel A1 BU4 −− 80 dB µV Second IF sound output level at level of 4.5 MHz A1 (black) + B1 BU5 84 −− dB µV Test on 2T pulse at Tamb =45 °C: 2T pulse/bar response A1 BU4 −2.5 −+2.5 % 2T pulse response A1 BU4 −−+3.0 % CVBS S/N (unweighted) A1 + B1 BU4 41 −− dB Gain limited sensitivity at 1 dB reduction of video output A1 BU4 −− 30 dB µV Maximum usable single input signal A1 BU4 90 −− dB µV Audio characteristics: AF output level measured via LP 200 kHz filter, RMS detector, 75 µs de-emphasis A1 + B2 BU6 0.21 0.31 0.41 V THD (Total Harmonic Distortion) measured via LP 200 kHz filter, RMS detector, 75 µs de-emphasis A1 + B2 BU6 −− 0.5 % S/N measured via CCIR filter, peak CCIR detector, 75 µs de-emphasis A1 (full field colour bar) +B1 BU6 38 −− dB AM suppression ratio A1 (black) + B2 BU6 40 −− dB Aerial input level for S/N = 41 dB A1 (black) + B2 BU6 −− 45 dB µV DIGITAL READ-OUT FREQUENCY (kHz) 00 −125 01 −62.5 02 0 03 +62.5 04 +125 |
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