Chapter 2 2-21
Getting Started
Making a Measurement
6. Set the amplitude.
When the peak of a signal does not appear on the screen, it may be
necessary to adjust the amplitude level on the screen. Press
AMPLITUDE Y Scale. Ref Level 0.0 dBm appears in the active
function block (48.75 dBmV with Option 1DP). The
Ref Level menu
key label is highlighted to indicate that reference level is the active
function. The reference level is the top graticule line on the display
and is set to 0.0 dBm (48.75 dBmV with Option 1DP). Changing the
value of the reference level changes the amplitude level of the top
graticule line.
If desired, use the reference level function to place the signal peak at
the top of the screen using the knob, step keys, or numeric keypad.
Figure 2-4 demonstrates the relationship between center frequency
and reference level. The box in the figure represents the analyzer
display. Changing the center frequency changes the horizontal
placement of the signal on the display. Changing the reference level
changes the vertical placement of the signal on the display.
Increasing the span increases the frequency range that appears
horizontally on the display.
NOTE Analyzers with Option 1DP default to display amplitude values in
dBmV when in a log scale mode.
NOTE For E4402B, E4404B, and E4405B analyzers with Option UKB,
frequencies below 100 kHz can be measured by setting the input to DC
coupled mode. (Input, Coupling (DC))
Figure 2-4 Relationship between Frequency and Amplitude
To Next Page
Loading...
Need help?
General
