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參數資料
| 型號： | LA75676VA |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| 封裝： | 0.225 INCH, SSOP-24 |
| 文件頁數： | 8/10頁 |
| 文件大小： | 93K |
| 代理商： | LA75676VA |
LA75676VA
No.7868-7/10
V14. Frequency characteristics [fc]
1. Apply a DC voltage to the external AGC IF input (pin 17) and vary that voltage.
2. SG1 : 45.75MHz, CW, 10mVrms
SG2 : from 45.65MHz to 39.75MHz, CW, 2mVrms
Add SG1 and SG2 using a T pad, adjust the signal generator levels to those listed above, and apply the result to
VIF IN.
3. First, set the SG2 frequency to 45.65MHz.
Next, adjust the IF AGC voltage (pin 17) so that the output level at test point A becomes 0.5Vp-p. V1
4. Set the SG2 frequency to 39.75MHz and measure the output level. V2
5. Perform the following calculation.
fc = 20log
V2
V1
(dB)
V15, V16. Differential gain and differential phase [DG, DP]
1. Internal AGC
2. fp = 45.75MHz, APL 50%, 87.5% video signal, Vi = 10mVrms
3. Measure DG and DP at test point A.
V17. AFT voltage (no signal) V13
1. Internal AGC
2. Measure the DC voltage on the AFT output (B).
V18, V19, V20. Maximum AFT voltage, minimum AFT voltage, AFT detection sensitivity [V13H, V13L, Sf]
1. Internal AGC
2. fp = 45.75MHz,
±1.5MHz sweep, 10mVrms (VIF input)
3. Record the maximum voltage as V13H and the minimum voltage as V13L.
4. Measure the frequency shift for the change in voltage at test point B from V1 to V2.
f
S
=
2000 (mV)
f (kHz) mV/kHz
V13H
V13L
V1 ; 3.5V
V2 ; 1.5V
IF frequency (MHz)
AFT output
(V)
f
相關PDF資料 |
PDF描述 |
|---|---|
| LA75676VA | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75676V | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75676V | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA7567BM | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA7567B | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP24 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LA75676VA-TLM-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LA75676V-S | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:VIF/SIF IF Signal-Processing Circuit for TV and VCR Products |
| LA7567B | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:LA7567B, LA7567BM |
| LA7567BM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:LA7567B, LA7567BM |
| LA7567EV | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:TV and VCR VIF/SIF IF Signal-Processing Circuit with PAL/NTSC Multi-Format Audio Support |
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