參數(shù)資料
型號(hào)： LA76070
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDIP52
封裝： SDIP-52
文件頁(yè)數(shù)： 4/27頁(yè)
文件大小： 308K
代理商： LA76070
Video Switch Block - Input Signals and Measurement Conditions
1. Unless otherwise indicated, these measurements are to be performed with no signal applied to PIF IN (pin 10) and
with the D/A converter IF.ACG.SW set to "1".
2. The table below lists the input signals and their labels.
No. 5844-12/27
LA76070
Input signal
Waveform
Condition
SG8
10-step staircase waveform
1 V p-p
SG9
4.2 MHz
1 Vp-p
Parameter
Symbol
Measurement
Input signal
Measurement procedure
Bus conditions
point
[VIF Block]
External video gain
AUXG
Pin 1
VIDEO.SW = "1"
SG8
Observe pin 42 with an oscilloscope and
measure the synchronizing signal tip voltage
External video sync signal tip
AUXS
Pin 1
in the waveform.
VIDEO.SW = "1"
voltage
SG8
Determine the voltage difference between this
measured value and synchronizing signal tip
level (VOtip) measured in the VIF block.
Pin 1
External video crosstalk
AUXC
SG8
VIDEO.SW = "0"
Pin 10
SG7
Internal video output level
INT0
(VIF block)
93 dB
42
Observe pin 42 with an oscilloscope, measure
the peak-to-peak value of the waveform, and
perform the following calculation.
AUXG = 20
× log (Vp-p) [dB]
Measure the 4.2 MHz component in the pin 42
signal with a spectrum analyzer.Convert this
measurement to a V peak-to-peak value and
perform the following calculation.
AUXG = 20
× log (1.4/Vp-p) [dB]
Observe pin 45 with an oscilloscope and
measure the peak-to-peak value of the
waveform. Determine the difference between
this measured value and the video output
amplitude (VO) measured in the VIF block.
After performing the adjustments
described in section 4
IF. AGC. SW = "0"
VIDEO. SW = "0"
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LA76075 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:NTSC Color Television Sets
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LA7621 制造商:Panasonic Industrial Company 功能描述:IC
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