參數(shù)資料
型號： LA76070
廠商： Sanyo Electric Co.,Ltd.
英文描述： NTSC Color Television IC
中文描述： NTSC制式彩色電視芯片
文件頁數(shù)： 13/27頁
文件大小： 308K
代理商： LA76070
SIF Block (FM Block) - Input Signals and Measurement Conditions
Unless otherwise indicated, set up the following conditions for each of the following measurements.
1. Bus control condition: IF.AGC.DEF = 1
2. SW: IF1 = off
3. Apply the input signal to pin 49 and use a 4.5 MHz carrier signal.
Audio Block - Input Signals and Test Conditions
No. 5844-13/27
LA76070
Parameter
Symbol
Measurement
point
Input signal
Measurement procedure
Bus conditions
Adjust the DAC (FM.LEVEL) so that the pin 7
FM detector output 1kHz component is as
close to 474 mV rms as possible, and
measure the output at that time in mV rms.
Record this measurement as SV1.
90 dBμ,
fm = 1 kHz,
FM = ±25 kHz
FM detector output voltage
SOADJ
fm = 1 kHz,
FM = ±25 kHz
Determine the input level (in dBμ) such that
the pin 7 FM detector output 1kHz component
is –3 dB down from the SV1 value
FM limiting sensitivity
SLS
FM.LEVEL = adjusted value
90 dBμ,
FM = ±25 kHz
Determine the modulation frequency
bandwidth (Hz) that is –3 dB or higher relative
to the pin 7 FM detector output SV1 value
FM detector output bandwidth
SF
FM.LEVEL = adjusted value
FM detector output total harmonic
distortion
90 dBμ,
fm = 1 kHz,
FM = ±25 kHz
Determine the total harmonic distortion in the
pin 7 FM detector output 1kHz component
STHD
FM.LEVEL = adjusted value
Measure the pin 7 FM detector output 1kHz
component (in mV rms).
Record this measured value as SV2 and
perform the following calculation.
SAMR = 20
×
log (SV1/SV2) [dB]
Set SW1:IF1 to the "ON"
Measure the pin 7 noise level (in mV rms).
Record this measured value as SV3 and
perform the following calculation.
SSN = 20
×
log (SV1/SV3) [dB]
90 dBμ,
fm = 1 kHz,
AM = 30%
AM rejection ratio
SAMR
FM.LEVEL = adjusted value
90 dBμ,
CW
SIF signal-to-noise ratio
SSN
FM.LEVEL = adjusted value
Parameter
Symbol
Measurement
point
Input signal
Measurement procedure
Bus conditions
Measure the output pin 1kHz component
(V1: mV rms) and perform the following
calculation.
AGMAX = 20
×
log (V1/400) [dB]
Measure the output pin 1kHz component
(V2: mV rms) and perform the following
calculation.
AGMAX = 20
×
log (V1/V2) [dB]
Measure the output pin 20kHz component
(V3: mV rms) and perform the following
calculation.
AF = 20
×
log (V3/V1) [dB]
Measure the output pin 20kHz component
(V4: mV rms) and perform the following
calculation.
AMUTE = 20
×
log (V3/V4) [dB]
Determine the total harmonic distortion in
output pin 1kHz component
Maximum gain
AGMAX
1 kHz, CW
400m Vrms
VOLUME = "111111"
AUDIO.MUTE = "0"
Variability range
ARANGE
1 kHz, CW
400m Vrms
VOLUME = "000001"
AUDIO.MUTE = "0"
Frequency characteristics
AF
20 kHz, CW
400m Vrms
VOLUME = "111111"
AUDIO.MUTE = "0"
Muting
AMUTE
20 kHz, CW
400m Vrms
VOLUME = "000000"
AUDIO.MUTE = "0"
Total harmonic distortion
ATHD
1 kHz, CW
400m Vrms
VOLUME = "111111"
AUDIO.MUTE = "0"
Measure the noise level (DIN.AUDIO) on
the output pin (V5: mV rms) and perform the
following calculation.
ASN = 20
×
log (V1/V5) [dB]
Signal-to-noise ratio
ASN
No signal
VOLUME = "111111"
AUDIO.MUTE = "0"
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相關代理商/技術參數(shù)
參數(shù)描述
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LA7621 制造商:Panasonic Industrial Company 功能描述:IC
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