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R&S FSP
Instrument Functions
Analyzer Mode
4.54
Operating Manual 1164.4556.12 - 06
• The marker measures only the position of the pixel on the trace and infers the
frequency of the signal from this value. The trace, however, contains only a limited
number of pixels. Depending upon the selected span, each pixel may contain
many measurement values, which therefore limits the frequency resolution.
• The resolution with which the frequency can be measured is proportional to the
measurement time. For this reason, the bandwidth is normally made as wide as
possible and the sweep time as short as possible. This results in a loss of
frequency resolution.
For the measurement with the frequency counter, the sweep is stopped at the refer-
ence marker, the frequency is counted with the desired resolution and then the
sweep is allowed to continue.
SIGNAL
COUNT
The
SIGNAL COUNT
softkey switches the frequency counter on/off.
The frequency is counted at the position of the reference marker (
MARKER 1
). The
sweep stops at the reference marker until the frequency counter has delivered a
result. The time required for a frequency measurement depends on the selected fre-
quency resolution. The resolution is set in the side menu.
If no marker is enabled when the
SIGNAL COUNT
softkey is pressed, MARKER 1 is
switched on and set at the largest signal.
In addition, the
SIGNAL COUNT
function is displayed in the marker info field on the
screen with [Tx CNT].
Switching the
SIGNAL COUNT
function off is accomplished by pressing the softkey
again.
Remote command:
CALC:MARK1:COUN ON;
CALC:MARK:COUN:FREQ?
The resolution of the frequency counter is set in the
NEXT
menu of the
MARKER
menu. R&S FSP offers counter resolutions between 0.1 Hz and 10 kHz.
REFERENCE
FIXED
The
REFERENCE FIXED
softkey defines the level and the frequency or time of
MARKER 1
as a reference for one or several delta markers. The measured values
for one or several markers displayed in the marker info field are derived from this
reference point instead of the current values of the reference marker (
MARKER 1
).
On actuating the softkey, reference fixed is switched on and thus, the level value
and the frequency, time or x-level value of
MARKER 1
immediately become the ref-
erence point.
MARKER 1 [T1 CNT]
23.4567891 MHz
-27.5 dBm
Summary of Contents for R&S FSP Series
Page 1: ...R S FSP Spectrum Analyzer Operating Manual 1164 4556 12 06 Test Measurement Operating Manual ...
Page 24: ...R S FSP Putting into Operation 1 2 Operating Manual 1164 4556 12 06 ...
Page 72: ...R S FSP Manual Operation 3 2 Operating Manual 1164 4556 12 06 ...
Page 793: ...R S FSP Index Operating Manual 1164 4556 12 06 4 11 ...
Page 794: ...R S FSP 4 12 Operating Manual 1164 4556 12 06 ...
Page 795: ...Operating Manual 1164 4556 12 06 4 13 R S FSP ...
Page 796: ...R S FSP 4 14 Operating Manual 1164 4556 12 06 ...