參數(shù)資料
型號(hào): TA8865BN
元件分類: 接收器
英文描述: AUDIO/VIDEO DEMODULATOR, PDIP36
封裝: 0.500 INCH, 1.78 MM PITCH, SHRINK, PLASTIC, DIP-36
文件頁數(shù): 10/27頁
文件大小: 571K
代理商: TA8865BN
TA8865BN
2001-02-21 18/27
Note 15: L Maximum Input
(1) Same as above.
(2) Gradually raise the input level and measure the input level at which Tp16 output amplitude reaches
0.5dB.The reference value (0dB) is the Tp16 signal amplitude when input signal amplitude is 90dBV.
Note 16: L No-Signal Level
(1) Apply 3V to Tp10 with no input, and measure the DC voltage on Tp16.
Note 17: L Sync Tip Level
(1) Set SW-3 to a and input SIG8 to Tp8, and adjust pin 35 voltage using VR (SW6-b) so
(2) Measure the sync tip DC level of the Tp16 output.
Note 18: PIF AGC Range
(1) (PIF AGC range) = (B / G-maximum input) (B / G-input sensitivity) [dB]
Note 19: PIF AGC Min. Output
(1) Set SW6 to a and SW3 to a, with no input to Tp8.
(2) Measure Tp10 voltage.
Note 20: PIF AGC Max. Output
(1) Set SW6 to a and SW3 to a, and input SIG9 to Tp8.
(2) Same as above.
Note 21: RF AGC Min. Output
(1) Set SW6 to a and SW3 to a, and input SIG9 to Tp8.
(2) Adjust pin 35 (RF AGC Delay) voltage to 7.0V using VR.
(3) Measure Tp21 voltage.
Note 22: RF AGC Max. Output
(1) Set SW6 to a and SW3 to a, with no input to Tp8.
(2) Adjust pin 35 (RF AGC Delay) voltage to 1.0V using VR.
(3) Measure Tp21 voltage.
Note 23: AFT Min. Output
(1) Set SW6 to a and SW3 to a, input SIG10 to Tp8, and set f0 to 39.4MHz.
(2) Measure Tp1 voltage.
Note 24: AFT Max. Output
(1) Set SW6 to a and SW3 to a, input SIG10 to Tp8, and set f0 to 38.5MHz.
(2) Measure Tp1 voltage.
(3) VCENT is Tp1 voltage with no input.
Note 25: AFT Sensitivity
(1) Set SW6 to a and SW3 to a, and input SIG10 to Tp8.
(2) Measure the input frequency (f AF1) when Tp1 reaches 3V
and the input frequency when Tp1 reaches 6V (f AF2).
(3) Determine the AFT Sensitivity using the following equation :
/ V]
[kHz
[V]
3.0
[kHz]
fAF2)
fAF1
(
f
/ /
F
=
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