Agilent Technologies N9320A Guía de usuario descargar pdf (Pagina 49)

Functions and Measurements 3

N9320A Spectrum Analyzer 41

Decreasing the Resolution Bandwidth

Resolution bandwidth settings affect the level of internal

noise without affecting the level of continuous wave (CW)

signals. Decreasing the RBW by a decade reduces the noise

floor by 10 dB.

1 Refer to the first procedure “Reducing Input Attenuation” on

page 39 and follow steps 1, 2 and 3.

2 Decrease the resolution bandwidth:

Press and

The low- level signal appears more clearly because the noise

level is reduced (see Figure 12).

Figure 12 Decreasing Resolution Bandwidth

A “#” mark appears next to the Res BW annotation in the

lower left corner of the screen, indicating that the resolution

bandwidth is uncoupled.

BW/

Avg

NOTE

The analyzer allows you to change the RBW in a 1-3-10 sequence by

the data control keys. The RBWs below 1 kHz are digital and have a

selectivity ratio of 5:1 while RBWs at 1 kHz and higher have a 15:1

selectivity ratio. The maximum RBW is 3 MHz and minimum is 10 Hz.

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 177 178

Sin comentarios

Agilent Technologies N9320A Guía de usuario Pagina 49