AN4126

Transmitter parameter

Doc ID 023299 Rev 1

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Figure 18.

Spurious conducted emission above 1 GHz measurement

3.3

Part 15.249 measurements

3.3.1

Peak output power

There are no particular requirements regarding the maximum permitted peak output power.

The max. output power must be about -1 dBm and no restrictions are defined for the

modulation scheme or the end application.

To perform this measurement on the SPIRIT1, the cases with 2-FSK modulation, 500 kbps

data rate and 250 kHz frequency deviation are chosen. The span is set to 2 MHz, the RBW

is set to 1 MHz, and the VBW equal to the RBW. The measured SPIRIT1 output power is -1

dBm. This output power is the maximum permitted output power in accordance with FCC

part 15.249 requirements.

AM13162v1

-70

-60

-50

-40

-30

-20

-10

0

1.000E+09

2.000E+09

3.000E+09

4.000E+09

5.000E+09

6.000E+09

7.000E+09

8.000E+09

9.000E+09

1.000E+10

Frequency [Hz]

2-FSK, 500 kbps, 250 kHz