Transmitter parameter

AN4387

10/22

DocID025465 Rev 1

Figure 5. Power spectral density Ch 37

4.3

Occupied channel bandwidth

The measurement shall be performed at the lowest and the highest frequency within the

stated frequency range.

The spectrum analyzer must be set with:

Center Freq: The center freq of the channel under test; Res BW: ~1% of the span without

going below 1%; Video BW: 3 × RBW; Freq Span: 4 MHz; Detector Mode: RMS;

Trace Mode: Max Hold.

Find the peak value of the trace and place the analyzer marker on this peak.

Use the 99 % bandwidth function of the spectrum analyzer to measure the occupied

channel bandwidth of the UUT.

The measures show a value equal to 1 MHz for all channels; it fall completely within the

band 2.4 - 2.4835 GHz.

AM17655v1

-60

-50

-40

-30

-20

-10

0

10

2401

2401.5

2402

2402.5

2403

MHz