参数资料
型号: LA76810HA
元件分类: 接收器
英文描述: AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP54
封装: 0.600 INCH, DIP-54
文件页数: 4/41页
文件大小: 417K
代理商: LA76810HA
LA76810HA
No.A1143-12/41
Audio Block Input Signals and Test Conditions
Unless otherwise specified, the following conditions apply when each measurement is made.
1. Bus control condition:
AUDIO.MUTE = "0", AUDIO.SW = "1", VOL.FIL = "0", SIF.SYS = "01", IF.AGC.SW = "1"
2. Input 5.5MHz, 90dB
and CW at pin 54.
3. Enter an input signal from pin 51.
Input signal
Symbol
Test point
Input signal
Test method
Bus conditions
Maximum gain
AGMAX
1kHz, CW
500mVrms
Measure the 1kHz component (V1: mVrms) at
the pin 1 and calculate as follows:
AGMAX = 20*LOG (V1/500) [dB]
VOLUME = "1111111"
Variable range
ARANGE
1kHz, CW
500mVrms
Measure the 1kHz component (V2: mVrms) at
the pin 1 and calculate as follows:
ARANGE = 20*LOG (V1/V2) [dB]
VOLUME = "0000000"
Frequency
characteristics
AF
20kHz, CW
500mVrms
Measure the 20kHz component (V3: mVrms) at
the pin 1 and calculate as follows:
AF = 20*LOG (V3/V1) [dB]
VOLUME = "1111111"
Mute
AMUTE
20kHz, CW
500mVrms
Measure the 20kHz component (V4: mVrms) at
the pin 1 and calculate as follows:
AMUTE = 20*LOG (V3/V4) [dB]
VOLUME = "1111111"
AUDIO.MUTE = ”1”
Distortion
ATHD
1kHz, CW
500mVrms
Measure the distortion of the 1kHz component at
the pin 1.
VOLUME = "1111111"
S/N
ASN
No signal
Measure the noise level (DIN AUDIO, V5:
mVrms) at the pin 1 and calculate as follows:
ASN = 20*LOG (V1/V5) [dB]
VOLUME = "1111111"
Crosstalk
ACT
20kHz, CW
500mVrms
Measure the 20kHz component (V6: mVrms) at
the pin 1 and calculate as follows:
ACT = 20*LOG (V3/V6) [dB]
VOLUME = "1111111"
AUDIO.SW = "0"
1
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