DocID024318 Rev 1

9/20

AN4271

Transmitter parameters

Figure 6. ETSI spectral mask measurement limits and sub-band edges

where:

•

f

c

is the emission center frequency

•

f

e

is the sub-band edge frequency

•

only the upper half of the emission is shown. The lower half is a mirror image.

Figure 7. spectral mask measurement, 100 kHz channel spacing

-30 dBm/1 kHz

-36 dBm/1 kHz

-36 dBm/10 kHz

-36 dBm/100 kHz

GAMS060320131449FSR

-75

-65

-55

-45

-35

-25

-15

-5

5

15

25

8.680E+08

8.683E+08

8.685E+08

8.688E+08

8.690E+08

8.693E+08

8.695E+08

8.698E+08

8.700E+08

8.703E+08

8.705E+08

8.708E+08

8.710E+08

Frequency [Hz]

Spectral mask, 38.4 kbps data rate, 20 kHz devia on

-30 dBm

-36 dBm

GAMS060320131637FSR