Advantech PWS-1419 Instrukcja Użytkownika Pobierz pdf (Strona 10)

Report Number: 021245-F

December 3, 2002

Page

Rev.

MEASUREMENT PROCEDURE

(FINAL LINE CONDUCTED EMISSION TEST)

1) EUT and support equipment was set up on the test bench as per step 10 of the preliminary test.

2) A scan was taken on both power lines, Line 1 and Line 2, recording at least the six highest emissions.

Emission frequency and amplitude were recorded into a computer in which correction factors were used

to calculate the emission level and compare reading to the applicable limit. If EUT emission level was

less –2dB to the A.V. limit in Q.P. mode, then the emission signal was re-checked using an Average

detector.

3) The test data of the worst case condition(s) was reported on the Summary Data page.

Data Sample:

Freq.

MHz

Q.P.

Raw

dBuV

Average

Raw

dBuV

Q.P.

Limit

dBuV

Average

Limit

dBuV

Q.P.

Margin

Average

Margin

Note

x.xx 43.95 --- 56 46 -12.05 --- L 1

Freq. = Emission frequency in MHz

Raw dBuV = Uncorrected Analyzer/Receiver reading

Limit dBuV = Limit stated in standard

Margin dB = Reading in reference to limit

Note = Current carrying line of reading

“---“ = The emission level complied with the Average limits,

with at least 2 dB margin, so no further recheck.

Calculation example:

Margin (dB) = RAW (dBuV) – Limit (dBuV)

LINE CONDUCTED EMISSION LIMIT

Maximum RF Line Voltage

Frequency

Q.P. AVERAGE

150kHz-500kHz 79dBuV 66dBuV

500kHz-5MHz 73dBuV 60dBuV

5MHz-30MHz 73dBuV 60dBuV

Note: The lower limit shall apply at the transition frequency.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 55 56

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