Agilent Technologies E7403A, E7405A, E7402A, E7404A manual Tracking Generator Output Power Activated

Making Complex Measurements

Making Stimulus Response Measurements

Figure 2-2 Tracking Generator Output Power Activated

7. Put the sweep time of the analyzer into stimulus response auto

	coupled mode by pressing Sweep, Swp Coupling (SR). Auto coupled
	sweep times are usually much faster for stimulus response
	measurements than they are for spectrum analyzer (SA)
	measurements. If necessary, adjust the reference level to place the
	signal on screen.
	In the stimulus response mode, the Q of the DUT can determine the
NOTE
	fastest rate at which the analyzer can be swept. (Q is the quality factor,
	which is the center frequency of the DUT divided by the bandwidth of
	the DUT.) To determine whether the analyzer is sweeping too fast, slow
	the sweep and note whether there is a frequency or amplitude shift of
	the trace. Continue to slow the sweep until there is no longer a
	frequency or amplitude shift.
	8. Decrease the resolution bandwidth to increase sensitivity by
	pressing BW/Avg, Res BW, and the step-down key (↓ ) until the
	sensitivity is increased. In Figure 2-3, the resolution bandwidth has
	been decreased to 30 kHz.
	9. Narrow the video bandwidth to smooth the noise by pressing
	BW/Avg, Video BW, and the step-down key (↓ ) until the noise is
	reduced. In Figure 2-3, the video bandwidth has been decreased to
	300 Hz.

Chapter 2 73