DocID025421 Rev 1

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AN4378

Transmitter parameter

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Figure 10. Spurious emission in restricted band measurement from 1 GHz to 2.4 GHz

Figure 11. Spurious emission in restricted band measurement from 2.5 GHz to 26 GHz

3.4.3

Unwanted emission in band edge

The measurements of unwanted emissions must be performed at the band edge also.

These measurements can be complicated by the capture of the RF energy from the

fundamental emission within the RBW passband. To perform these measurements the

“Marker-Delta Method” can be used, as described in KDB 913591 [4].

AM17625v1

-70

-60

-50

-40

-30

-20

-10

1.0000E+09

1.2000E+09

1.4000E+09

1.6000E+09

1.8000E+09

2.0000E+09

2.2000E+09

2.4000E+09

Frequency [Hz]

AM17626v1

-70

-60

-50

-40

-30

-20

-10

2.5000E+09

7.5000E+09

1.2500E+10

1.7500E+10

2.2500E+10

Frequency [Hz]