Rohde & Schwarz FPL1000 Series, Руководство пользователя

Страница: 381 / 899

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
381 User Manual 1178.3370.02 ─ 03
● Select "Frequency" from the "Overview" .
● Select the FREQ key and then the "Frequency Config" softkey.
● Select the SPAN key and then the "Frequency Config" softkey.
2. Define the frequency range using one of the following methods:
● Define the "Center Frequency" and "Span" .
● Define the "Start Frequency" and "Stop Frequency" .
● To perform a measurement in the time domain, define the "Center Frequency"
and select the "Zero Span" button.
● To perform a measurement over the entire available frequency range, select
the "Full Span" button.
● To return to the previously set frequency range, select the "Last Span" button.
7.4.5 How to Move the Center Frequency through the Frequency Range
In some cases it may be useful to move the center frequency through a larger fre-
quency range, for example from one harmonic to another.
1. In the "Frequency" dialog box, define the "Center Frequency Stepsize" . This is the
size by which the center frequency is to be increased or decreased in each step.
Enter a manual or relative value, or set the step size to the current center fre-
quency or marker value. To move from one harmonic to the next, use the center
frequency or marker value.
2. Select the "Center Frequency" dialog field.
3. Use the arrow keys to move the center frequency in discrete steps through the
available frequency range.
7.5 Amplitude and Vertical Axis Configuration
In the Spectrum application, measurement results usually consist of the measured sig-
nal levels (amplitudes) displayed on the vertical (y-)axis for the determined frequency
spectrum or for the measurement time (horizontal, x-axis). The settings for the vertical
axis, regarding amplitude and scaling, are described here.
"Auto Settings" are described in Chapter 7.8, "Adjusting Settings Automatically" ,
on page 418.
● Impact of the Vertical Axis Settings .......................................................................382
● Amplitude Settings ................................................................................................ 384
● Scaling the Y-Axis .................................................................................................387
● How to Optimize the Amplitude Display ................................................................389
Amplitude and Vertical Axis Configuration