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參數(shù)資料
| 型號： | TB1254N |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP56 |
| 封裝： | 0.600 INCH, PLASTIC, SDIP-56 |
| 文件頁數(shù)： | 26/58頁 |
| 文件大?。?/td> | 526K |
| 代理商： | TB1254N |
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Ver3.7
00/01/28 32
Note
Items/Symbols
Bus conditions
Measurement methods
P7
Video output signal
amplitude
/ vDet(p)n
/ vDet(p)p
RF AGC:except 0
PIF Freq. :
38.9MHz
VCO Adj. Req. :
0/1
L-SECAM MODE
:0/1
Others : Preset
(1)Input a signal that 38.9[MHz], 90[dB
V], and 87.5 [%] negative
modulated by 100% white video signal at pin 6.
(2)Set the bit of “VCO Adj. Req.” to “1”, and set the bit of “VCO Adj.
Req.” to “0”.
(3)Set the bit of “L-SECAM MODE” to “0”.
(4)Measure the amplitude of the pin 54 output signal (vDet(p)n[Vp-
p]).
(5)Input a signal that 38.9[MHz], 90[dB
V], and 97 [%] positive
modulated by 100% white video signal at pin 6.
(6)Set the bit of “L-SECAM MODE” to “1”.
(7)Measure the amplitude of the pin 54 output signal (vDet(p)p[Vp-
p]).
P8
Video output S/N
/ S/N(p)
RF AGC:except 0
PIF Freq. :
38.9MHz
VCO Adj. Req. :
0/1
Others : Preset
(1)Input a signal that 38.9[MHz], 90[dB
V], and 87.5 [%] modulated
by black video signal at pin 6.
(2)Set the bit of “VCO Adj. Req.” to “1”, and set the bit of “VCO Adj.
Req.” to “0”.
(3)Measure the video S/N for pin 54 output (HPF : 100[kHz], LPF :
5[MHz], CCIR weighted) (S/N(p)[dB]).
P9
Synchronous signal
level
/ Vsync n
/ Vsync p
RF AGC:except 0
PIF Freq. :
38.9MHz
VCO Adj. Req.:
0/1
L-SECAM MODE
:0/1
Others : Preset
(1)Input a signal that 38.9[MHz], 90[dB
V], 87.5[%] negative
modulated by 100% white signal at pin 6.
(2)Set the bit of “VCO Adj. Req.” to “1”, and set the bit of “VCO Adj.
Req.” to “0”.
(3)Set the bit of “L-SECAM MODE” to “0”.
(4)Measure the voltage of the sync. tip at pin 54 (Vsync n[V]).
(5)Input a signal that 38.9[MHz], 90[dB
V], and 97 [%] positive
modulated by 100% white video signal at pin 6.
(6)Set the bit of “L-SECAM MODE” to “1”.
(7)Measure the voltage of the sync. tip at pin 54 (Vsync p[V]).
P10
Video bandwidth
(-3dB)
/ fDet(p)
RF AGC:except 0
PIF Freq.:
38.9MHz
VCO Adj. Req.:
0/1
L-SECAM MODE
:0/1
Others : Preset
(1)Input the mixture of 2 signals (signal1 : 38.9[MHz]/82[dB
V],
signal 2 : 38.8[MHz]/69[dB
V]) to pin 6.
(2)Set the bit of “VCO Adj. Req.” to “1”, and set the bit of “VCO Adj.
Req.” to “0”.
(3)Measure the minimum voltage of the output signal at pin 54
(Vo#54).
(4)Apply the DC voltage to pin 10 and adjust it so that the minimum
voltage of the output signal at pin 54 is equal to Vo#54.
(5)Decrease frequency of the input signal 2 at pin 6, and measure
amplitude of the output signal at pin 54.
(6)Measure fDet(p) shown as below.
Frequency of
the output signal at pin54
Ref.level
Ou
t
p
ut
a
m
p
lit
ude
a
t
pin
54
3[dB]
100[kHz]
f Det(p)
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