LA76070 View Datasheet(PDF) - SANYO -> Panasonic
Part Name
Description
Manufacturer
LA76070 Datasheet PDF : 27 Pages
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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.
Parameter
FM detector output voltage
FM limiting sensitivity
FM detector output bandwidth
FM detector output total harmonic
distortion
AM rejection ratio
SIF signal-to-noise ratio
Symbol
SOADJ
SLS
SF
STHD
SAMR
SSN
Measurement
point
Input signal
Measurement procedure
Adjust the DAC (FM.LEVEL) so that the pin 7
90 dBµ, FM detector output 1kHz component is as
7
fm = 1 kHz, close to 474 mV rms as possible, and
FM = ±25 kHz measure the output at that time in mV rms.
Record this measurement as SV1.
Determine the input level (in dBµ) such that
7
fm = 1 kHz, the pin 7 FM detector output 1kHz component
FM = ±25 kHz is –3 dB down from the SV1 value
Determine the modulation frequency
7
90 dBµ, bandwidth (Hz) that is –3 dB or higher relative
FM = ±25 kHz to the pin 7 FM detector output SV1 value
90 dBµ,
7
fm = 1 kHz, Determine the total harmonic distortion in the
FM = ±25 kHz pin 7 FM detector output 1kHz component
Measure the pin 7 FM detector output 1kHz
90 dBµ, component (in mV rms).
7
fm = 1 kHz, Record this measured value as SV2 and
AM = 30% 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).
7
90 dBµ,
CW
Record this measured value as SV3 and
perform the following calculation.
SSN = 20 × log (SV1/SV3) [dB]
Bus conditions
FM.LEVEL = adjusted value
FM.LEVEL = adjusted value
FM.LEVEL = adjusted value
FM.LEVEL = adjusted value
FM.LEVEL = adjusted value
Audio Block - Input Signals and Test Conditions
Parameter
Maximum gain
Variability range
Frequency characteristics
Muting
Total harmonic distortion
Signal-to-noise ratio
Symbol
Measurement
point
Input signal
Measurement procedure
AGMAX
ARANGE
AF
AMUTE
ATHD
ASN
Measure the output pin 1kHz component
51
1 kHz, CW (V1: mV rms) and perform the following
400m Vrms calculation.
AGMAX = 20 × log (V1/400) [dB]
Measure the output pin 1kHz component
51
1 kHz, CW (V2: mV rms) and perform the following
400m Vrms calculation.
AGMAX = 20 × log (V1/V2) [dB]
Measure the output pin 20kHz component
51
20 kHz, CW (V3: mV rms) and perform the following
400m Vrms calculation.
AF = 20 × log (V3/V1) [dB]
Measure the output pin 20kHz component
51
20 kHz, CW (V4: mV rms) and perform the following
400m Vrms calculation.
AMUTE = 20 × log (V3/V4) [dB]
51
1 kHz, CW Determine the total harmonic distortion in
400m Vrms output pin 1kHz component
Measure the noise level (DIN.AUDIO) on
51
No signal
the output pin (V5: mV rms) and perform the
following calculation.
ASN = 20 × log (V1/V5) [dB]
Bus conditions
VOLUME = "111111"
AUDIO.MUTE = "0"
VOLUME = "000001"
AUDIO.MUTE = "0"
VOLUME = "111111"
AUDIO.MUTE = "0"
VOLUME = "000000"
AUDIO.MUTE = "0"
VOLUME = "111111"
AUDIO.MUTE = "0"
VOLUME = "111111"
AUDIO.MUTE = "0"
No. 5844-13/27
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