參數(shù)資料
型號(hào)： TB1261F
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝： 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件頁(yè)數(shù)： 28/66頁(yè)
文件大?。?/td> 1538K
代理商： TB1261F
TB1261F/TB1262F
2002-6-30 34 / 66
TEST CONDITION
PIF STAGE
Note
Items/Symbols
Bus conditions
Measurement methods
P1
Video output signal
amplitude
/ vDet(p)n
/ vDet(p)p
RF AGC:except 0
PIF Freq. :
38.9MHz
PIF det lev;01(b)
L-SECAM MODE
:0/1
Others : Preset
(1) Input a signal that 38.9[MHz], 90[dB(mV)], and 87.5 [%]
negative modulated by 100% white video signal at pin 79.
(2) Set the bit of “L-SECAM MODE” to “00”.
(3) Measure the amplitude of the pin 68 output signal
(vDet(p)n[V(p-p)]).
(4) Input a signal that 38.9[MHz], 90[dB(mV)], and 97 [%]
positive modulated by 100% white video signal at pin 6.
(5) Set the bit of “L-SECAM MODE” to “01”.
(6) Measure the amplitude of the pin 68 output signal
(vDet(p)p[V(p-p)]).
P2
PIF Input Sensitivity
/ vin min(p)
PIF maximum input
signal
/ vin max(p)
PIF gain control
range
/ RAGC(p)
RF AGC:except 0
PIF
Freq.:38.9MHz
Others : Preset
(1) Input a signal that 38.9[MHz], 90[dB(mV)], and 30 [%]
modulated by 15 [kHz] sine wave at pin 79..
(2) Measure the amplitude at Pin 68(vo#68 [V(p-p)]).
(3) Decreasing the IF input level, measure the input level at
which the output amplitude at pin 68 turns to be –3dB
against “vo#68” (vin min(p)[dB(mV)]).
(4) Increasing the IF input level, measure the input level at
which the output amplitude at pin 54 turns to be -1dB
against “vo#68” (vin min(p)[dB(mV)]).
(5) RAGC(p)[dB] = vin max(p) - vin min(p)
P3
Synchronous signal
level
/ Vsync n
/ Vsync p
RF AGC:except 0
PIF Freq. :
38.9MHz
L-SECAM
MODE
:0/1
Others : Preset
(1) Input a signal that 38.9[MHz], 90[dB(mV)], 87.5[%] negative
modulated by 100% white signal at pin 79.
(2) Set the bit of “L-SECAM MODE” to “00”.
(3) Measure the voltage of the sync. tip at pin 68 (Vsync n[V]).
(4) Input a signal that 38.9[MHz], 90[dB(mV)], and 97 [%]
positive modulated by 100% white video signal at pin 79.
(5) Set the bit of “L-SECAM MODE” to “01”.
(6) Measure the voltage of the sync. tip at pin 68 (Vsync p[V]).
Differential Gain
/ DG
P4
Differential Phase
/ DP
RF AGC:except 0
PIF Freq.:
38.9MHz
Vi Pol:0/1
Others : Preset
(1) Input a signal that 38.9[MHz], 90[dB(mV)], and 87.5 [%]
modulated by 10 stair video signal at pin 79.
(2) Measure "DG[%]" and "DP[°]" for Pin54 output.
P5
Video bandwidth
(-3dB)
/ fDet(p)
RF AGC:except 0
PIF Freq.:
38.9MHz
L-SECAM
MODE
:0/1
Others : Preset
(1) Input the mixture of 2 signals (signal1 : 38.9[MHz] /
82[dB(mV)], signal 2 : 38.8[MHz] / 69[dB(mV)]) to pin 79.
(2) Measure the minimum voltage of the output signal at pin 68
(Vo#68).
(3) Apply the DC voltage to pin 1 and adjust it so that the
minimum voltage of the output signal at pin 68 is equal to
Vo#68.
(4) Decrease frequency of the input signal 2 at pin 79, and
measure amplitude of the output signal at pin 68.
(5) Measure fDet(p) shown as below.
Frequency of the output signal at pin68
vDet1M
Ref level
O
utput
ampl
itude
at
pin
68
3[dB]
1[MHz]
f Det(p)
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