LA76810A データシートの表示（PDF） - SANYO -> Panasonic
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LA76810A
SANYO -> Panasonic
LA76810A Datasheet PDF : 40 Pages
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LA76810A
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 = "01", DEEM-TC = "0", FM.GAIN = "0"
2. SW:IF1 = "ON"
3. Input signals are input to pin 54 and the carrier frequency is 5.5MHz.
Input signal
Symbol
Test point
Input signal
Test method
FM detection
output voltage
SOADJ
FM limiting
sensitivity
FM detection
output f characteristics
(fm = 100kHz)
FM detection output
distortion
AM rejection
ratio
SLS
SF
STHD
SAMR
SIF.S/N
PAL de-emph time
constant
PAL/NT
Difference of voltage
gain
SSN
SPTC
SGD
90dBµ,
Adjust the DAC (FM.LEVEL) such that the 400Hz
2
fm = 400Hz, component of the FM detection output at pin 2
FM = ±30kHz become as close to 600mVrms as possible and
measure (SV1:mVrms) the output at that
moment.
fm = 400Hz, Measure the input level (dBµ) at which the 400Hz
2
FM = ±30kHz component of the FM detection output at pin 2
becomes -3dB relative to SV1.
90dBµ,
Set SW: IF1 = "OFF".
2
fm = 100kHz Measure (SV2: mVrms) the FM detection output
FM = ±30kHz of pin 2. Calculate as follows:
SF = 20*LOG (SV1/SV2) [dB]
90dBµ,
Measure the distortion factor of the 400Hz
2
fm = 400Hz, component of the FM detection output at pin 2.
FM = ±30kHz
90dBµ,
Measure the 1kHz component (SV3: mVrms) of
2
fm = 400Hz, the FM detection output at pin 2.
AM = 30%
Assign the measured value to SV3 and
calculate as follows:
SAMR = 20*LOG (SV1/SV3) [dB]
90dBµ,
Measure the noise level (DIN AUDIO, SV4:
2
CW
mVrms) at pin 2. Calculate as follows:
SSN=20*LOG(SV1/SV4) [dB]
90dBµ,
Measure the 3.18kHz component (SV5: mVrms)
2
fm = 3.18KHz of the FM detection output at pin 2 and calculate
FM = ±30KHz as follows:
SNTC = 20*LOG (SV1/SV5) [dB]
fo = 4.5MHz Measure the 400Hz component (SV6: mVrms) of
2
90dBµ,
the FM detection output at pin 2 and calculate as
fm = 400Hz follows:
FM = ±15KHz SNTC = 20*LOG (SV1/SV6) [dB]
NT de-emph
time constant
SNTC
fo = 4.5MHz Measure the 2.12kHz component (SV7: mVrms)
2
90dBµ,
of the FM detection output at pin 2 and calculate
fm = 2.12kHz as follows:
FM = ±15kHz SNTC = 20*LOG (SV6/SV7) [dB]
BPF 3db band width
SBW
90dBµ,
Set SW: IF1 = "OFF".
2
CW
Pin9 = 5V
Measure the 458kHz component (SV8: mVrms)
at pin 2. Set the input frequency to 5.565MHz to
the input frequency and measure the 393kHz
component (SV9: mVrms) at pin 2 to calculate as
follows:
SBW = 20*LOG (SV8/SV9) [dB]
Bus conditions
FM level =
Adjustment value
FM level =
Adjustment value
FM level =
Adjustment value
FM level =
Adjustment value
FM level =
Adjustment value
FM level =
Adjustment value
FM level =
Adjustment value
SIF.SYS = "00"
DEEM-TC = "1"
FM.GAIN = "1"
FM level =
Adjustment value
SIF.SYS = "00"
DEEM-TC = "1"
FM.GAIN = "1"
FM level=
Adjustment value
NoA0252-10/40
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