Operation
R&S
®
DDF205
25
Getting Started 4073.0187.02 ─ 03
Manual explains how this can be done. If HF option is present, HF Tuner Limit
sets the upper frequency limit of the direct reception HF tuner. Frequencies
above this limit will undergo a 2- or 3-stage heterodyne receiver path.
8. Press ESC to exit the dialog box and again to get to the top menu.
2.3.2.5
Basic Operation - Fixed Frequency Mode (FFM)
Receiver Mode
As stated before, the R&S
DDF205 is able to operate as a normal receiver.
Before proceeding with the DF functions, some fundamental receiver opera-
tions will be explained first. Use the APPL key to switch the R&S
DDF205 to
receiver mode.
Operating in the top menu, the screen and softkeys are as shown in
, on page 19. Ensure the panel focus is on the Spectrum display (press
PANEL until the IF panel gets a light blue y-axis).
1. Tuning the Mid Frequency can be performed via:
a) ROTARY KNOB – the tuning step is defined in the "STEP" softkey menu.
b) CURSOR LEFT / CURSOR RIGHT Key – the tuning step is half the
"SPAN" width defined in the softkey menu.
c) Data Entry Keys – Direct entry of the frequency is possible. The Mid Fre-
quency dialog box appears upon keypress and the softkey menu switches
into editing mode with different units and backspace.
2. The FFT Mode softkey allows the FFT trace to be displayed in the following
modes:-
Graphical User Interface (GUI)
