Analyzer Mode; Frequency And Span Selection - Freq Key - R&S ESU Series Operating Manual

R&S ESU

4.8 Analyzer Mode

The analyzer mode is activated by pressing the SPECTRUM hotkey (see also sec-
tion
SPECTRUM The SPECTRUM hotkey selects the mode for spectrum analysis, the so-called ana-
lyzer mode.
The functions provided correspond to those of a conventional spectrum analyzer.
The R&S ESU measures the frequency spectrum of the test signal over the selected
frequency range with the selected resolution and sweep time, or, for a fixed fre-
quency, displays the waveform of the video signal.
If two displays (screen A and screen B) are opened after switch-on of signal analy-
sis, the analyzer mode is only set for the display activated for entry (marked at the
top right corner of diagram). For the other display, the previous settings remain
valid.
Data acquisition and display of measured values is sequential: first in the upper
and then in the lower display.
4.8.1 Frequency and Span Selection – FREQ Key
The FREQ key is used to specify the frequency axis of the active display window.
The frequency axis can be defined either by the start and stop frequency or by the
center frequency and bwthe span (SPAN key). With two windows (SPLIT SCREEN)
displayed at the same time, the input data always refer to the window selected in the
SYSTEM - DISPLAY menu.
The softkeys in the CF STEPSIZE menu depend on the selected domain: frequency
domain or time domain.
FREQ
CENTER
CF STEPSIZE
START
STOP
FREQUENCY OFFSET
SIGNAL TRACK
4.102
"Mode Selection – Hotkey Bar" on page
! 0.1 * SPAN
0.5 * SPAN
X * SPAN
= CENTER
= MARKER
MANUAL
!
TRACK ON/OFF
TRACK BW
TRACK THRESHOLD
SELECT TRACE
4.9)
/ 0.1 * RBW
/ 0.5 * RBW
/ X * RBW
Operating Manual 1302.6163.12 - 03
Instrument Functions
Analyzer Mode