參數(shù)資料
型號(hào): TA8865BN
元件分類(lèi): 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(yè)數(shù): 15/27頁(yè)
文件大?。?/td> 571K
代理商: TA8865BN
TA8865BN
2001-02-21 22/27
Note 45: H Frequency Control Range
(1) Apply 8.7V to pin 35 (SW6-a), set SW2 to b, apply 2V to Tp17, VCC to Tp with no input.
(2) Apply 8.5V to Tp12, and measure the frequency of Tp9 output. The difference between this frequency
and 15.625kHz is fVHi.
(3) Apply 6.5V to Tp12, and measure the frequency of Tp9 output. The difference between this frequency
and 15.625kHz is fVLo.
Note 46: H Frequency Control Sensitivity
(1) Same as above.
(2) Measure Tp12 voltage (VβH)
(3) Set the Tp12 voltage to (VβH+0.2V) and measure the frequency of Tp9 output (fβ5) set the Tp12 voltage
to (VβH0.2V) and measure the frequency of Tp9 output (fβ6). Determine βH using the following
equation :
/ V]
[kHz
[mV]
400
[kHz]
|
6
f
5
f
|
H
β
β
=
β
Note 47: Sync Detection Level
(1) Set SW3 to b SW6 to a, input SIG17 to Tp15, and set fH to 15.625kHz.
(2) Gradually lower the input amplitude and measure the amplitude (VHVin) at which Tp13 voltage changes
from 0V to 9V.
(3) Set SW3 to a and SW6 to a, and input SIG4 to Tp8.
(4) Gradually lower the input level and measure the level (VHLin) at which Tp13 output voltage changes from
0V to 9V.
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