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
文件頁數(shù)： 35/66頁
文件大?。?/td> 1538K
代理商： TB1261F
TB1261F/TB1262F
2002-6-30 40 / 66
VIDEO stage
VIDEO stage (RGB Mute:0 / R cut off:128 / DC rest.:2(100%) / WPS:1(OFF))
Note
Items/Symbols
Bus conditions
Measurement methods
V1
Y Input Dynamic
Range
/ DRY
Y/Monout=0
ctrap = off
Ydl=011(b)
Others: Preset
(1) Input a white signal with sync into Pin61.
(2) Increasing the Pin61 input amplitude, measure the
amplitude at which the Pin53 output is clipped, that is
"DRY".
V2
Y Delay Time
/ tYDELP
/ tYDELS
/ ΔtYDEL-120
/ ΔtYDEL+160
/ ΔtYDEL step
Y/Monout=0
ctrap = off
Ydl=parametric
Others: Preset
(1) Input a 2T pulse with sync and PAL burst into Pin61.
(2) Set the BUS data so that Y DL is 0ns(011).Observe the
Pin53 output, measure the delay time between Pin61 and
Pin53, that is "tYDELP".
(3) Set the BUS data so that Y DL is –120ns(000). Observe the
Pin53 output, measure the delay time between Pin61 and
Pin53 that is tYDEL-120.
(4) Set the BUS data so that Y DL is +160ns(111). Observe the
Pin53 output, measure the delay time between Pin61 and
Pin53 that is tYDEL+160.
(5) Calculate, “ΔtYDEL-120”= tYDEL-120 - "tYDEL"
1.
“ΔtYDEL+160”= tYDEL+160 - "tYDEL"
2.
“ΔtYDEL”= (“ΔtYDEL+160”- “ΔtYDEL-120”)/7
(6) Input a 2T pulse with sync and SECAM ID into Pin61.
(7) Set the BUS data so that Y DL is 0ns(011).Observe the
Pin53 output, measure the delay time between Pin61 and
Pin53, that is "tYDELS".
V3
Chroma Trap Gain
/ GTRAP
Y/Monout=0
ctrap=parametric
Ydl=011(b)
Others: Preset
(1) Input a 0.5V(p-p), 4.43MHz signal with sync into Pin61.
(2) Measure the 4.43MHz amplitude at PIn53 for Chroma
Trap:1/0, that is VTRAPON / VTRAPOFF.
(3) Calculate;"GTRAP443"=20*log(VTRAPON/VTRAPOFF)
(4) Input a 0.5V(p-p), 3.58MHz signal with sync into Pin61.
(5) Measure the 3.58MHz amplitude at PIn53 for Chroma
Trap:1/0, that is VTRAPON / VTRAPOFF.
(6) Calculate;"GTRAP358"=20*log(VTRAPON/VTRAPOFF)
V4
Y gain
(1) Input 1Vp-p white signal with sync into pin #61
(2) Measure the gain between pin#61 and pin #53 for its
picture (without sync) level. Gy1
V5
Y Frequency
Response
/ FRY
Y/Monout=0
ctrap = off
Ydl=011(b)
Others: Preset
(1) Input a 0.5V(p-p) sweep signal with sync into Pin61.
(2) Measure the frequency at which the output amplitude is
3dB down against the level of 100Hz, which is "FRY".
V6
Mon out gain (MON)
(Y1/CVBS1) GTV1
(Y2/CVBS2) GTV2
(Y3/CVBS3) GTV3
Y/Monout=1
videosw=paramet
ric
Others: Preset
(1) Input 1Vp-p white signal with sync into pin #61, #55, and
#44
(2) Measure the gain from pin#61, #55 and #44 to pin #53 in
switching the IICBUS of 'video sw'.
V7
Y frequency response
FRY
Y/Mon out = 1
video sw = 00
Others: Preset
(1) Input a 0.5V(p-p) sweep signal with sync into Pin61.
(2) Measure the frequency at which the output amplitude is
3dB down against the level of 100Hz, which is "FRY".
V switch cross-talk
(CVBS1-CVBS2)
CTCVBS1_2
(CVBS1-CVBS3)
CTCVBS1_3
(CVBS2-CVBS1)
CTCVBS2_1
(CVBS2-CVBS3)
CTCVBS2_3
(CVBS3-CVBS1)
CTCVBS3_1
(CVBS3-CVBS2)
CTCVBS3_2
Y/Monout=1
videosw=paramet
ric
Others: Preset
(1) Input a sine wave signal (CVBS, V0=0.5Vp-p, f0=4MHz)
into pin 61, connect pin 55 and 44 to GND through 0.1 F
capacitor.
(2) Set the bit of “Video SW” to “01, V2”, and measure the
amplitude of 4MHz signal at pin 53, that is V1-2.
(3) Set the bit of “Video SW” to “00, V1” and measure the
amplitude of 4MHz signal at pin 53, that is V1.
(4) “C CVBS1_2” = 20*log (V1-2 / V1)
(5) Measure the same way as (1)-(4) for others with the
combination of desired and undesired inputs,
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