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参数资料
| 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： | 14/27页 |
| 文件大小： | 571K |
| 代理商： | TA8865BN |
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TA8865BN
2001-02-21 21/27
Note 39: AM Audio S / N Ratio
(1) Apply 5V to pin 35 (SW6-b), set SW2 to b and SW4 to c, and input SIG2 to Tp7.
(2) Measure Tp4 output amplitude (V SNA), and determine the AM audio S / N using the following equation :
[dB]
]
rms
[mV
SNF
V
]
rms
[mV
oAM
V
og
20
AM
No
l
=
Note 40: AM Audio Distortion
(1) Apply 5V to pin 35 (SW6-b), set SW2 to b and SW4 to c, and input SIG13 to Tp7.
(2) Measure the distortion Tp4 output.
Note 41: SIF VCO Pull-In Range
(1) Apply 5V to pin 35 (SW6-b), set SW2 to b and input SIG7 to Tp7.
(2) While observing Tp4, gradually decrease input frequency until PLL locks. The difference between this
frequency and 32.4MHz is fSpU. In the same way, gradually increase input frequency until PLL locks. The
difference between this frequency and 32.4HMz is fSpL.
Note 42: S VCO Control Sensitivity
(1) Apply 5V to pin 35 (SW6-b), set SW2 to b and input SIG7 to Tp7.
(2) Measure Tp22 Voltage (VβS).
(3) Using a spectrum analyzer, measure the frequency of S-VCO leaking to Tp2. Set the Tp22 voltage to
(VβS+0.2V) and measure S-VCO frequency (fβ3), set the Tp22 voltage to (VβS0.2V) and measure
S-VCO frequency (fβ4). Determine βS using the following equation :
/ V]
[MHz
[mV]
400
[kHz]
|
4
f
3
f
|
S
β
β
=
β
Note 43: H Free-run Frequency
(1) Set SW5 to b and with no input to Tp15, measure Tp12 voltage (VHF).
(2) Input SIG17 to Tp15. Changing input frequency and measure the input frequency at which Tp12 voltage
reaches VHF.
Note 44: H Pull-In Range
(1) Set SW3 to b, SW6 to a, input SIG17 to Sync Input (Tp15), and apply 9V to Tp11.
(2) While observing Tp13, gradually decrease input frequency (fH) until Tp13 output voltage change from 9V
to 0V. The difference between this frequency and 15.625kHz is fHpU.
(3) While observing Tp13, gradually increase input frequency (fH) until Tp13 output voltage change from 9V
to 0V. The difference between this frequency and 15.625kHz is fHpL.
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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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