ETC Report No. : ET90S-11-032
Sheet 25 of 104 Sheets
FCC ID. : HFSWM100
Rev. No 1.0
7 EMISSION BANDWIDTH MEASUREMENT
7.1 Standard Applicable
According to 15.247(a)(2), for direct sequence system, the minimum 6dB bandwidth shall
be at least 500 kHz.
7.2 Measurement Procedure
1. Check the calibration of the measuring instrument using either an internal calibrator or a
known signal from an external generator.
2. Position the EUT as shown in figure 4. Turn on the EUT and connect it to measurement
instrument. Then set it to any one convenient frequency within its operating range. Set a
reference level on the measuring instrument equal to the highest peak value.
3. Measure the frequency difference of two frequencies that were attenuated 6 dB from the
reference level. Record the frequency difference as the emission bandwidth.
4. Repeat above procedures until all frequencies measured were complete.
Figure 4: Emission bandwidth measurement configuration.
EUT
Spectrum
Analyzer
7.3 Measurement Equipment
Equipment
Manufacturer
Model No.
Next Cal. Due
Plotter
Hewlett-Packard
7440A
N/A
Spectrum Analyzer
Hewlett-Packard
8564EC
09/10/2002
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