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參數(shù)資料
| 型號： | TB1254N |
| 廠商： | Toshiba Corporation |
| 英文描述： | PAL / NTSC / SECAM 1CHIP (IF+VCD PROCESSOR) IC |
| 中文描述： | PAL / NTSC制式/ SECAM制式1CHIP（中頻光碟處理器）芯片 |
| 文件頁數(shù)： | 36/58頁 |
| 文件大?。?/td> | 551K |
| 代理商： | TB1254N |
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Ver3.7
00/01/28
36
Note
S12
Items/Symbols
Audio switch cross-
talk
/ CT(s)T-E
/ CT(s)E-T
Bus conditions
SIF-Freq. : 5.5M
AUDIO-SW : 0/1
AUDIO ATT : 127
Other : Preset
Measurement methods
(1) Input a signal that 5.5[MHz], 100[dB V], 50[kHz] deviated by
1[kHz] sine wave at pin 56.
(2) Connect pin 53 to GND through a 4.7[ F] capacitor.
(3) Measure level of the 1[kHz] at pin 4 (v#4T1[dB V]).
(4) Set the bit of “AUDIO-SW” to “1”.
(5) Measure level of the 1[kHz] at pin 4 (v#4E1[dB V]).
(6) CT(s)T-E[dB] = v#4E1-v#4T1
(7) Input a 5.5[MHz], 100[dB V] signal at pin 56.
(8) Measure level of the 1[kHz] at pin 4 (v#4E2[dB V]).
(9) Input a 1[kHz], 927[mVrms] signal at pin 53.
(10) Set the bit of “AUDIO-SW” to “0”.
(11) Measure level of the 1[kHz] at pin 4 (v#4T2[dB V]).
(12) CT(s)E-T[dB] = v#4T2-v#4E2
(1) Input a 5.5[MHz], 100[dB V] signal at pin 56.
(2) Connect pin 53 to GND through a 4.7[ F] capacitor.
(3) Set the bit of “AUDIO-SW” to “0”.
(4) Measure the voltage at pin 4 (V#4T[V]).
(5) Set the bit of “AUDIO-SW” to “1”.
(6) Measure the voltage at pin 4 (V#E[V]).
(7) Vos sw[V] = V#4E-V#4T
S13
Audio switch off-set
/ Vos sw
SIF-Freq. : 5.5M
AUDIO-SW : 0/1
AUDIO ATT : 127
Other : Preset
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