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Chapter 1 57
Making Basic Measurements
Making Noise Measurements
10.Measure the power between markers by pressing Marker, More,
Function, Band Power. The analyzer displays the total power between
the markers. See Figure 1-48.
11. Add a discrete tone to see the effects of the reading. Turn on the
internal 50 MHz amplitude reference signal of the analyzer (if you
have not already done so) as follows:
• For the E7401A, use the internal 50 MHz amplitude reference
signal of the analyzer as the signal being measured. Press
Input/Output, Amptd Ref (On).
• For all other models connect a cable between the front-panel
AMPTD REF OUT to the analyzer INPUT, then press
Input/Output, Amptd Ref Out (On).
Figure 1-48 Viewing Power Between Markers
12.Move the measured span by pressing Marker, Span Pair (Center).
Then use the knob to exclude the tone and note reading. You could
have also used
Band Pair or Delta Pair to set the measurement start
and stop points independently. See Figure 1-49.