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AN2744 データシート(PDF) 32 Page - STMicroelectronics

部品番号 AN2744
部品情報  ST7538Q power line FSK transceiver
PDF  56 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2744 データシート(HTML) 32 Page - STMicroelectronics

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Figure 27
and Figure 28 show the results for the output spectrum measurement. The
EN50065-1 disturbance limits mask is traced in red. It may be compared with the typical
output spectrum of the ST7538Q dual channel reference design board for each channel.
Figure 26.
Conducted disturbance test setup
Figure 27.
Output spectrum (typical) at 72 kHz channel, mains 220 VAC, fixed transmitted tone =
"1"
EN50065
EN50065--1
1
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
130.0
1.0E+04
1.0E+05
1.0E+06
1.0E+07
1.0E+08
Frequency (Hz)
f
C =70.8 kHz
S=120.1 dBµV
2f
C =141.6 kHz
S=55.3 dBµV
3f
C =212.4 kHz
S=58.1 dBµV
EN50065
EN50065--1
1
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
130.0
1.0E+04
1.0E+05
1.0E+06
1.0E+07
1.0E+08
Frequency (Hz)
f
C =70.8 kHz
S=120.1 dBµV
2f
C =141.6 kHz
S=55.3 dBµV
3f
C =212.4 kHz
S=58.1 dBµV



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