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參數(shù)資料
| 型號(hào)： | LA76832N |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Monolithic Linear IC I2C Bus Control IC |
| 中文描述： | 單片線性集成電路I2C總線控制IC |
| 文件頁(yè)數(shù)： | 9/39頁(yè) |
| 文件大?。?/td> | 398K |
| 代理商： | LA76832N |
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LA76832N
No.0069-9/39
SIF Block (FM block) Input Signals and Test Conditions
Unless otherwise specified, the following conditions apply when each measurement is made.
1. Bus control condition : IF. AGC. SW = “1”, SIF.SYS = ”00”, DEEM-TC = ”1”, FM.GAIN = ”1”
2. SW : IF1 = “ON”
3. Input signals are input to pin 54 and the carrier frequency is 4.5MHz.
Test
point
FM detection
output voltage
fm = 400Hz,
FM =
±
25kHz
Parameter
Symbol
Input
signal
Test method
Bus conditions
SOADJ
2
90dB
μ
,
Adjust the DAC (FM. LEVEL) such that the 400
Hz component of the FM detection output at pin
2 become as close to 500 mVrms as possible
and measure (SV1 : mVrms) the output at that
moment.
Measure the input level (dB
μ
) at which the
400Hz component of the FM detection output at
pin 2 becomes -3dB relative to SV1.
Set SW : IF1 = "OFF".
Measure (SV2 : mVrms) the FM detection output
of pin 2. Calculate as follows :
SF = 20Log (SV1/SV2) [dB]
Measure the distortion factor of the 400Hz
component of the FM detection output at pin 2.
FM limiting sensitivity
SLS
2
fm = 400Hz,
FM =
±
25kHz
FM level =
Adjustment value
FM detection output f
characteristics
(fm=100kHz)
SF
2
90dB
μ
,
fm = 100kHz,
FM =
±
25kHz
FM level =
Adjustment value
FM detection output
distortion
STHD
2
90dB
μ
,
fm = 400Hz,
FM =
±
25kHz
90dB
μ
,
fm = 400Hz,
AM = 30%
FM level =
Adjustment value
AM rejection ratio
SAMR
2
Measure the 1kHz component (SV3 : mVrms) of
the FM detection output at pin 2.
Assign the measured value to SV3 and
calculate as follows :
SAMR = 20Log (SV1/SV3) [dB]
Measure the noise level (DIN AUDIO, SV4 :
mVrms) at pin 2. Calculate as follows :
SSN = 20Log (SV1/SV4) [dB]
Measure the 2.12kHz component (SV5 : mVrms)
of the FM detection output at pin 2 and calculate
as follows :
SNTC = 20Log (SV1/SV5) [dB]
FM level =
Adjustment value
SIF. S/N
SSN
2
90dB
μ
,
CW
FM level =
Adjustment value
NT de-emph time constant
SNTC
2
90dB
μ
,
fm = 2.12kHz,
FM =
±
25kHz
FM level =
Adjustment value
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