Specifications

PL 3120/PL 3150/PL 3170 Power Line Smart Transceiver Data Book 177
Table 5.12 Switching Power Supply Input Noise Limits for A-band CENELEC Compliance
Frequency (kHz)
Noise Level (dBμV):
Quasi-Peak Detector
Noise Level (dBμV):
Average Detector
9 89 N/A
70 72 N/A
70+ 30 N/A
90 30 N/A
90+ 70 N/A
150 66 56
500 56 46
5000 56 46
5000+ 60 50
30000 60 50
Table 5.13 Switching Power Supply Input Noise Limits for A-band FCC Compliance
Frequency (kHz)
Noise Level (dBμV):
Quasi-Peak Detector
9 89
70 72
70+ 30
90 30
90+ 70
450 57
450+ 48
30000 48
A PL Smart Transceiver-based device with a power supply that does not meet the appropriate power supply
input noise mask will require a filter between supply and the power mains.
An example of a filter which both attenuates switching supply noise and provides >200 ohm input impedance in the
C-band is shown in Figure 5.16. Note that both inductors must be rated for the peak AC current drawn by the power
supply.
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