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參數(shù)資料
| 型號(hào)： | TB1254N |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP56 |
| 封裝： | 0.600 INCH, PLASTIC, SDIP-56 |
| 文件頁數(shù)： | 28/58頁 |
| 文件大?。?/td> | 526K |
| 代理商： | TB1254N |
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Ver3.7
00/01/28 34
SIF STAGE
Note
Items/Symbols
Bus conditions
Measurement methods
S1
Limiting sensitivity
/ vin lim(s)4.5MH
/ vin lim(s)4.5ML
/ vin lim(s)5.5M
/ vin lim(s)6.0M
/ vin lim(s)6.5M
SIF-Freq. :
4.5M/5.5M/6.0M/
6.5M
AUDIO ATT : 127
Others : Preset
(1) Set the bits of “SIF-Freq.” to “11”.
(2) Input a signal that 4.5[MHz], 100[dB
V], 25[kHz] deviated by
400[Hz] sine wave at pin 56.
(3) Measure the amplitude at pin 4 (vo#4[mVrms]).
(4) Decreasing the 4.5[MHz] signal level, measure the 4.5[MHz]
signal level at which the amplitude at pin 4 turns to be –3[dB]
against “vo#4” (vin lim(s)4.5MH[dB
V]).
(5) Input a signal that 4.5[MHz], 100[dB
V], 25[kHz] deviated by
400[Hz] sine wave at pin 56.
(6) Do same measuring as above (3)~(4) (vin lim(s)4.5ML).
(7) Set the bits of “SIF-Freq.” to “00”.
(8) Change the frequency of the input signal to 5.5MHz, and
change the deviation of the input signal to 50[kHz].
(9) Do same measuring as above (3)~(4) (vin lim(s)5.5M).
(10) Set the bits of “SIF-Freq.” to “01”.
(11) Change the frequency of the input signal to 6.0MHz, and do
same measuring as above (3)~(4) (vin lim(s)6.0M).
(12) Set the bits of “SIF-Freq.” to “10”.
(13) Change the frequency of the input signal to 6.5MHz, and do
same measuring as above (3)~(4) (vin lim(s)6.5M).
S2
AM reduction ratio
/ AMR4.5MH
/ AMR4.5ML
/ AMR5.5M
/ AMR6.0M
/ AMR6.5M
SIF-Freq. :
4.5M/5.5M/6.0M/
6.5M
AUDIO ATT : 127
Others : Preset
(1) Set the bits of “SIF-Freq.” to “11”.
(2) Input a signal that 4.5[MHz], 100[dB
V], 25[kHz] deviated by
400[Hz] sine wave at pin 56.
(3) Measure the amplitude at pin 4 (vo#4[mVrms]).
(4) Input a signal that 4.5[MHz], 100[dB
V], and 30 [%] modulated
by 400 [Hz] sine wave at pin 56.
(5) Measure the amplitude at pin 4 (v#4[mVrms]).
(6) AMR4.5H[dB] = 20log(v#4/ vo#4)
(7) Input a signal that 4.5[MHz], 100[dB
V], 25[kHz] deviated by
400[Hz] sine wave at pin 56.
(8) Do same measuring as above (3)~(6) (AMR4.5ML).
(9) Set the bits of “SIF-Freq.” to “00”.
(10) Change the frequency of the input signals to 5.5MHz, and
change the deviation of the input signal to 50[kHz].
(11) Do same measuring as above (3)~(6) (AMR5.5M).
(12) Set the bits of “SIF-Freq.” to “01”.
(13) Change the frequency of the input signals to 6.0MHz, and do
same measuring as above (3)~(6) (AMR6.0M).
(14) Set the bits of “SIF-Freq.” to “10”.
(15) Change the frequency of the input signals to 6.5MHz, and do
same measuring as above (3)~(6) (AMR6.5M).
S3
AF output signal
amplitude
/ vDet(s)4.5MH
AF output S/N
/ S/N(s)4.5MH
Total harmonics
distortion
/ THD4.5MH
SIF-Freq. : 4.5M
AUDIO ATT : 127
Others : Preset
(1)Input a signal that 4.5[MHz], 100[dB
V], 25[kHz] deviated by
1[kHz] sine wave at pin 56.
(2)Measure the amplitude at pin 4 (vDet(s)4.5MH[mVrms]).
(3)Measure the total harmonics distortion at pin 4 (THD4.5MH[%]).
(4)Input a 4.5[MHz], 100[dB
V] signal at pin 56.
(5)Measure the amplitude at pin 4 (vn(s)[mVrms]).
(6)S/N4.5MH[dB] = 20log(vDet(s)/vn(s))
S4
AF output signal
amplitude
/ vDet(s)4.5ML
AF output S/N
/ S/N(s)4.5ML
Total harmonics
distortion
/ THD4.5ML
SIF-Freq. : 4.5M
AUDIO ATT : 127
Others : Preset
(1)Input a signal that 4.5[MHz], 100[dB
V], 25[kHz] deviated by
1[kHz] sine wave at pin 56.
(2)Do same measuring as vDet(s)4.5MH et al. (vDet(s)4.5ML,
S/N(s)4.5ML, THD4.5ML).
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