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| 型号： | TA8865BN |
| 元件分类： | 接收器 |
| 英文描述： | AUDIO/VIDEO DEMODULATOR, PDIP36 |
| 封装： | 0.500 INCH, 1.78 MM PITCH, SHRINK, PLASTIC, DIP-36 |
| 文件页数： | 9/27页 |
| 文件大小： | 571K |
| 代理商： | TA8865BN |
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TA8865BN
2001-02-21 17/27
Note 9: 2nd Harmonic Suppression Ratio
(1) Set SW6 to a and SW3 to a, and input SIG5 to Tp8.
(2) Measure the output amplitude of Tp16.→(VI1) [rms]
(3) Input SIG1 (non-modulation) to Tp8 using a spectrum analyzer, measure the 77.8MHz component of
Tp16 output.→(VI2) [rms]
(4) Determine the 2nd harmonic suppression ratio using the following equation :
[dB]
]
rms
[mV
I2
V
]
rms
[mV
I1
V
og
20
HR
l
=
Note 10: Intermodulation
(1) Set SW6 to a and SW3 to a, input SIG7 to Tp8, and apply an external voltage to Tp10.
Adjust DC voltage applied to Tp10 so that output signal bottom level of Tp16 reaches VSYNCB.
(2) Using a spectrum analyzer, measure the 1.07MHz component (VIM) [dBV], and 4.43MHz (VCHR)
[dBV] component.
(3) Determine the intermodulation using following equation :
IM = VCHRVIM
Note 11: Video frequency characteristic
(1) Set SW6 to a and SW3 to a, input SIG5 to Tp8, and set f2 to 37.9MHz.
(2) While observing Tp16, apply an external voltage to Tp10. Adjust DC voltage applied
to Tp10 so that bottom level of Tp16 output signal reaches VSYNCB.
(3) Gradually lower f2 until the output amplitude of Tp16 reaches 3dB.
The reference value (0dB) is Tp16 signal amplitude when f2 is 37.9MHz.
The difference between f2 and f1 is fc.
Note 12: L-SECAM max. video output amplitude
(1) Apply 4.0V (SW5-a) to pin 35, set SW3 to a, and input SIG8 to Tp8.
(2) Measure the output amplitude of Tp16.
Note 13: L-SECAM Min. Video Output Amplitude
(1) Apply 7.0V (SW6-b) to pin 35, set SW3 to a, and input SIG8 to Tp8.
(2) Measure the output amplitude of Tp16.
Note 14: L Input Sensitivity
(1) Set to SW3-a and input SIG8 Tp8, and adjust pin 35 voltage using VR (SW6-b) so that output amplitude
of Tp16 is 2Vp-p.
(2)Gradually lower the input level and measure the input level at which Tp16 output amplitude reaches 3dB.
The reference value (0dB) is the Tp16 output amplitude when input signal amplitude is 90dBV.
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相关代理商/技术参数 |
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|---|---|
| TA8867AN | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:VIDEO, CHROMA, AND SYNC. SIGNAL PROCESSING IC FOR PAL/NTSC-SYSTEM COLOR TELEVISIONS |
| TA8867BN | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:VIDEO, CHROMA, AND SYNC. SIGNAL PROCESSING IC FOR PAL/NTSC-SYSTEM COLOR TELEVISIONS |
| TA8874Z | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:SOUND MULTIPLEX BROADCAST DEMODULATOR IC FOR DOMESTIC TV/VTR |
| TA8874Z_01 | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:SOUND MULTIPLEX BROADCAST DEMODULATOR IC FOR DOMESTIC TV / VTR |
| TA8876FA | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:FOR LCD TVS, PIF, QIF, AND SIF SYSTEMS |
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