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參數(shù)資料
| 型號： | LA7615 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Single-Chip NTSC Color TV IC |
| 中文描述： | 單片集成電路NTSC制式彩電 |
| 文件頁數(shù)： | 18/39頁 |
| 文件大小： | 206K |
| 代理商： | LA7615 |
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First SIF Block - Input Signals and Test Conditions
For each of the test items, set up the following conditions unless otherwise specified.
1.
PIF.IN: 45.75 MHz, 93 dBμ, CW
2.
Bus control conditions: Set the following 4 items to their adjusted values.
(See the VIF block test description for details on the adjustment procedure.)
APC DET.ADJ
PLL tuning
4.5 MHz trap
Video level
3.
Apply the input signal to the pin 12, using a signal with a frequency of 41.25 MHz CW.
SIF Block - Input Signals and Test Conditions
For each of the test items, set up the following conditions unless otherwise specified.
1.
Connect pin 13 (SIF AGC) to ground.
2.
Bus control conditions: IF.AGC.SW = 1.
3.
SW:IF1 = off
4.
Apply the input signal to pin 61. The carrier frequency should be 4.5 MHz.
No. 5841-18/39
LA7615
Parameter
Symbol
Test point
Input signal
Test procedure
Bus condition
4.5 MHz conversion gain
4.5 MHz output level
First SIF maximum input
SC
G
SV
O
SV
M
60 dBμ
88 dBμ
96 dBμ
Measure the pin 59 output 4.5 MHz component (mV
rms). Let SV1 be this measured value and perform
the following calculation.
SC
G
= 20
×
log(SV1
×
1000) – 60 [dB]
Measure the pin 59 output 4.5 MHz component (mV
rms). Let SV2 be this measured value and perform
the following calculation.
SC
O
= 20
×
log(SV2
×
1000) [dB]
Measure the pin 59 output 4.5 MHz component (mV
rms). Let SV3 be this measured value and perform
the following calculation.
SC
M
= 20
×
log(SV3/SV1) [dB]
59
Parameter
Symbol
Test point
Input signal
Test procedure
Bus condition
FM detector output voltage
FM limiting sensitivity
FM detector output bandwidth
FM detector output distortion
AM rejection ratio
SIF signal-to-noise ratio
SO
ADJ
SLS
SF
S
THD
S
AMR
S
SN
90 dBμ,
fm = 1 kHz,
FM = ±25 kHz
fm = 1 kHz,
FM = ±25 kHz
90 dBμ,
FM ±25 kHz
90 dBμ,
fm = 1 kHz,
FM ±25 kHz
90 dBμ,
fm = 1 kHz,
AM = 30%
90 dBμ, CW
Adjust the D/A converter (FM.LEVEL) so that the pin
5 FM detector output 1 kHz component is as close to
424 mV rms as possible. Measure the output (mV
rms) at that time.
Let SV1 be the measured value at this time.
Determine the input level (dBμ) such that the pin 5
FM detector output 1 kHz component is down –3 dB
from SV1.
Determine the modulation frequency bandwidth (Hz)
for a –3 dB drop in the pin 5 FM detector output
1 kHz component with respect to SV1.
Determine the distortion in the pin 5 FM detector
output 1 kHz component.
Measure (in mV rms) the pin 5 FM detector output
1 kHz component.
Let SV2 be the measured value at this time and
perform the following calculation.
S
AMR
= 20
×
log(SV1/SV2) [dB]
Set the SW:IF1 switch to the on state.
Measure the noise level (mV rms) on pin 5.
Let SV3 be the measured value at this time and
perform the following calculation.
S
SN
= 20
×
log(SV1/SV3) [dB]
FM.LEVEL =
adjusted value.
FM.LEVEL =
adjusted value.
FM.LEVEL =
adjusted value.
FM.LEVEL =
adjusted value.
FM.LEVEL =
adjusted value.
5
5
5
5
5
5
59
59
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| LA7620 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Color TV Video, Chroma, Deflection Circuit |
| LA7621 | 制造商:Panasonic Industrial Company 功能描述:IC |
| LA7625 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Video, Chroma and Deflection Circuit for Color Television Sets |
| LA7626 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Video, Chroma and Deflection Circuit for Color Television Sets |
| LA7629 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Color TV/Video,Chroma,Deflection Circuit |
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