TA8721ASN View Datasheet(PDF) - Toshiba
Part Name
Description
Manufacturer
TA8721ASN Datasheet PDF : 9 Pages
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Note 4:
AMR
Limiter input
AMR1 : fo=4.5MHz, 100dBµV, fm=400Hz, 30% AM modulation
AMR2 : fo=4.724MHz, 100dBµV, fm=400Hz, 30% AM modulation
After the above input, measure the output level of sound output. (AMout)
Calculate the ratio of the output level of Note 1.
AMR
=
20log
AMout
VOD
TA8721ASN
Note 5:
Note 6:
Audio Frequency Bandwidth
Limiter input
AFBW1 : fo variable (center 4.5MHz), 100dBµV, fm=400Hz, 100% (25kHz / dev) FM modulation
AFBW2 : fo variable (center 4.724MHz), 100dBµV, fm=400Hz,
100% (25kHz / dev) FM modulation
After the above input, measure the output level of sound output. Calculate the frequency width
when the output level of Note 1 becomes −3dB by changing the fo frequency high and low.
S / N Ratio
Limiter input
S / N (1) : fo=4.5MHz, 100dBµV CW
S / N (2) : fo=4.724MHz, 100dBµV CW
After the above input, measure the output level of sound output (S / N out). Calculate the ratio of
the output level of Note 1.
S
/
N
=
20log
S
VOD
/ N out
Note 7:
Note 8:
Cross Talk between sound outputs
Limiter input
CR1:
SIF1 fo=4.5MHz, 100dBµV, fm=400Hz
SIF2 fo=4.724MHz, 100dBµV, CW
CR2:
SIF1 fo=4.5MHz, 100dBµV, CW
SIF2 fo=4.724MHz, 100dBµV, fm=400Hz
After the above input, measure the output leakage level of sound output.
CR1 (2)
=
20log
SIF
SIF
1 (2)
2 (1)
Limiter input resitance
Measure the resistance of limiter input terminal by impedance analyzer.
2001-02-06 6/9
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