Operating Manual 1302.6163.12 - 03 4.9
R&S ESU Instrument Functions
Mode Selection – Hotkey Bar
4.3 Mode Selection – Hotkey Bar
For fast mode selection the R&S ESU has keys located under the measurement
screen, the so-called hotkeys. These hotkeys are displayed depending on the
options installed on the instrument. According to the selected mode, the correspond-
ing softkey menus are displayed (on the right side of the measurement screen).
In this section, only the hotkeys provided by the basic model are described. For
information on the other hotkeys refer to the corresponding option descriptions. 
Fig. 4.1 Hotkey bar of the basic model
SPECTRUM
The SPECTRUM hotkey sets R&S ESU to analyzer mode. For details on the softkey
menus refer to section “Analyzer Mode” on page 4.102.
Remote command: INST:SEL SAN
INST:NSEL 1
RECEIVER
The RECEIVER hotkey sets the R&S ESU in the test receiver mode.
Remote command: INST:SEL REC 
INST:NSEL 6
IF
The IF hotkey activates the IF analysis mode.
Remote command: INST: IFAN
APD
The APD hotkey activates the CISPR weighting function for measuring the Ampli-
tude Probability Distribution (APD) of a disturbance signal.
Remote command: INST:SEL APD
MORE
The MORE hotkey switches to side hotkey bar(s) and back to the main hotkey bar.
In the side hotkey bar(s), the hotkeys for the options are located. For further infor-
mation refer to the descriptions of the corresponding options.
SCREEN A / 
SCREEN B
With the SCREEN A / SCREEN B hotkey two different settings can be selected on
the R&S ESU in the FULL SCREEN display mode. 
In the SPLIT SCREEN display mode the key switches between active diagram A
and B. 
The key designation indicates the diagram which has been activated by means of
the key.
The currently active window is marked by   or   on the right of the dia-
gram.
Remote command: DISP:WIND<1|2>:SEL A
A
B