R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
Example
[PRESET] R&S FSQ is set to the default setting.
Remote command: CALC:MARK ON
CALC:MARK:X
CALC:MARK:Y?
CALC:DELT ON
CALC:DELT:MODE ABS|REL
CALC:DELT:X
CALC:DELT:X:REL?
CALC:DELT:Y?
Analyzer Mode
[MKR] On calling the menu, MARKER 1 is switched on ('1' highlighted in
the softkey) and positioned on the maximum value of the trace. It is
a normal marker and the MARKER NORMAL softkey is highlighted.
[MARKER 2] MARKER 2 is switched on ('2' highlighted in the softkey). It is automatically
defined as a delta marker on switching on so the DELTA
is highlighted on softkey MARKER NORM DELTA. The frequency
and level of MARKER 2 with reference to MARKER 1 are output in
the marker info field.
[MARKER
NORM DELTA]
The MARKER NORM DELTA softkey is highlighted. MARKER 2
becomes a normal marker. The frequency and level of MARKER 2
are output as absolute values in the marker info field.
[MARKER 2] MARKER 2 is switched off. MARKER 1 is the active marker for
entry. The frequency and level of MARKER 1 are output in the
marker info field.
When several traces are being displayed, the marker is set to the maximum value
(peak) of the active trace which has the lowest number (1 to 3). In case a marker is
already located there, it will be set to the frequency of the next lowest level (next
peak).
When the split-screen display mode is active, the marker will be placed in the active
window. A marker can only be enabled when at least one trace in the corresponding
window is visible.
If a trace is turned off, the corresponding markers and marker functions are also
deactivated. If the trace is switched on again (VIEW, CLR/WRITE;..), the markers
along with coupled functions will be restored to their original positions provided the
markers have not been used on another trace.
4.5.10.1 Frequency Measurement with the Frequency Counter
In order to accurately determine the frequency of a signal, R&S FSQ is equipped
with a frequency counter which measures the frequency of the RF signal at the intermediate
frequency. Using the measured IF, R&S FSQ calculates the frequency of
the RF input signal by applying the known frequency conversion factors.
The frequency measurement error depends only upon the accuracy of the frequency
standard used (external or internal reference). Although R&S FSQ always operates
synchronously irrespective of the set span, the frequency counter delivers a more
exact result than a measurement performed with a marker. This is due to the following:
4.56 Operating Manual 1313.9681.12 - 01