Agilent Technologies E7405A, E7402A, E7404A manual Using Signal Tracking to Track a Drifting Signal

Making Basic Measurements

Tracking Drifting Signals

8.The signal frequency drift can be read from the screen if both the signal track and marker delta functions are active. Set the analyzer and signal generator as follows:

a.Press Marker, Delta.

b.Tune the frequency of the signal generator. The marker readout indicates the change in frequency and amplitude as the signal drifts. See Figure 1-21.

Figure 1-21 Using Signal Tracking to Track a Drifting Signal

Tracking Signal Drift Example 2:

The analyzer can measure the short- and long-term stability of a source. The maximum amplitude level and the frequency drift of an input signal trace can be displayed and held by using the maximum-hold function. You can also use the maximum hold function if you want to determine how much of the frequency spectrum a signal occupies.

1.Connect a signal generator to the analyzer input.

2.Set the signal generator frequency to 300 MHz with an amplitude of

− 20 dBm.

3.Set the analyzer as follows:

a. Press Preset, Factory Preset (if present).

b. Set the Y-Axis Units to dBm by pressing AMPLITUDE, More, Y-Axis Units, dBm.

c. Set the resolution bandwidth to spectrum analyzer coupling by pressing BW/Avg, Resolution BW (SA).

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