Agilent Technologies N9340A Instrukcja Użytkownika Pobierz pdf (Strona 40)

3 Making Measurements

30 N9340A User’s Guide

Resolving Small Signals

Hidden by Large Signals

This example uses narrow resolution bandwidths to

resolve two input signals with a frequency

separation of 50 kHz and an amplitude difference

of 60 dB.

1 Connect two sources to the analyzer input

connector as shown in Figure 3 on page 28.

2 Set one source to 300 MHz at –10 dBm. Set the

other source to 300.05 MHz at –70 dBm.

3 Set the analyzer as follows:

• Press [PRESET]

• Press [FREQ] > {Center Freq} > 300.05 > {MHz}

• Press [SPAN] > [500] > kHz.

• Press [BW/SWP] > {RBW} > 300 > {Hz}

4 Reduce the resolution bandwidth filter to view

the smaller hidden signal. Place a delta marker

on the smaller signal:

• Press [MARKER] > {Peak Search}

• Press [MARKER] > {Delta}

• Press [MARKER] > {Peak Search} > {Next Right PK}

or {Next Left PK}.

Figure 5 Resolving small signal hidden by a large signal

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Agilent Technologies N9340A Instrukcja Użytkownika Strona 40