參數(shù)資料
型號(hào)： LA76075
廠商： Sanyo Electric Co.,Ltd.
英文描述： NTSC Color Television Sets
中文描述： NTSC制式彩電
文件頁(yè)數(shù)： 16/35頁(yè)
文件大?。?/td> 712K
代理商： LA76075
No. 5845-16/35
LA76075
Audio Block Input Signals and Measurement Conditions
1. Input the left channel signal to pin 1, and input 51 IN and right channel signals to pin 47 and measured at pin 47.
2. Use the following bus control condition: VOL.FIL.DEF = “0.”
Item
Symbol
Measurement
Point
Input
Signal
Measurement Procedure
Bus Condition
Maximum gain
Measure V1, the 1 kHz component (mVrms) at the
output pin, and substitute in the following formula.
AGMAX = 20
×
LOG(V1/400) [dB]
AGMAX
47, 51
1 KHz, CW
400 mVrms
VOLUME : 111111
AUDIO.MUTE : 0
Variable range
Measure V2, the 1 kHz component (mVrms) at the
output pin, and substitute in the following formula.
AGMAX = 20
×
LOG(V1/V2) [dB]
ARANGE
47, 51
1 KHz, CW
400 mVrms
VOLUME : 000000
AUDIO.MUTE : 0
Left/right balance
Compute the ratio of the left channel output to the right
channel output.
ABAR
47, 51
1 KHz, CW
400 mVrms
VOLUME : 111111
AUDIO.MUTE : 0
f characteristic
Measure V3, the 20 kHz component (mV{rms}) at the
output pin, and substitute in the following formula.
AF = 20
×
LOG(V3/V1) [dB]
AF
47, 51
20 KHz, CW
400 mVrms
VOLUME : 111111
AUDIO.MUTE : 0
Muting
Set AUDIO.MUTE to “1,” measure V4, the 20 kHz
component at the output pin, and substitute in the
following formula.
AMUTE = 20
×
LOG(V3/V4) [dB]
AMUTE
47, 51
20 KHz, CW
400 mVrms
VOLUME : 111111
AUDIO.MUTE : 1
Left/right crosstalk
Input the left signal only and compute the ratio of the
left channel output to the right channel output.
ACT
47, 51
20 KHz, CW
400 mVrms
VOLUME : 111111
AUDIO.MUTE : 0
Total harmonic distortion
Determine the total harmonic distortion in the 1 kHz
component at the output pin.
ATHD
47, 51
1 KHz, CW
400 mVrms
VOLUME : 111111
AUDIO.MUTE : 0
S/N
Measure SV5, the noise level (mVrms) at the output
pin, and substitute in the following formula.
ASN = 20
×
LOG(V1/V5) [dB]
ASN
47, 51
No signal
VOLUME : 111111
AUDIO.MUTE : 0
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