Elliott PowerWave 2.4GHz Radio, Руководство пользователя, Страница: 12 / 135

Elliott Laboratories, Inc. -- EMC Department Test Report
Report Date: October 20, 1998
File: R28747 Page 12 of 14 pages
SPECIFICATION LIMITS AND SAMPLE CALCULATIONS
The limits for conducted emissions are given in units of microvolts, and the limits for
radiated emissions are given in units of microvolts per meter at a specified test distance.
Data is measured in the logarithmic form of decibels relative to one microvolt, or dB
microvolts (dBuV). For radiated emissions, the measured data is converted to the field
strength at the antenna in dB microvolts per meter (dBuV/m). The results are then
converted to the linear forms of uV and uV/m for comparison to published specifications.
For reference, converting the specification limits from linear to decibel form is
accomplished by taking the base ten logarithm, then multiplying by 20. These limits in
both linear and logarithmic form are as follows:
CONDUCTED EMISSIONS SPECIFICATION LIMITS, SECTION 15.207
Frequency
Range Limit Limit
(MHz) (uV) (dBuV)
________________________________________________________________________
0.450 to 30.000 250 48
RADIATED EMISSIONS SPECIFICATION LIMITS, SECTION 15.209
Frequency
Range Limit Limit
(MHz) (uV/m @ 3m) (dBuV/m @ 3m)
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0.009-0.490 2400/FKHz @ 300m 67.6-20*log10(FKHz) @ 300m
0.490-1.705 24000/FKHz @ 30m 87.6-20*log10(FKHz) @ 30m
1.705 to 30 30 @ 30m 29.5 @ 30m
30 to 88 100 40
88 to 216 150 43.5
216 to 960 200 46.0
Above 960 500 54.0