R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
• SRC
Index of selected generator
• STATE
External Generator Control – Option R&S FSP-B10
Selects the active generator. Only one generator can be active at a time. The
operating mode of the active generator is set to remote control in the SELECT
GENERATOR table.
• POWER
Permits to enter the generator level within the limits P MIN to P MAX of the
SELECT GENERATOR table.
• NUM
Numerator,
• DEN
Denominator,
• OFFSET
Offset, used to derive the generator frequency from the current frequency of the
R&S FSQ according to the following formula:
Numerator
FGenerator =
FAnalyzer ⋅ ---------------------------------- + F
Denominator Offset
Note that the frequencies resulting from start and stop frequency of the R&S FSQ
do not exceed the allowed generator range:
– If the start frequency lies below F MIN, the generator is only switched on when
F MIN is reached.
– If the stop frequency lies above F MAX, the generator is switched off. When
the generator is subsequently switched on using the EXT SRC ON/OFF
softkey, the stop frequency is limited to F MAX.
– If the stop frequency lies below F MIN, the generator is switched off and the
following error message output:
– In the time domain (Span = 0 Hz) the generator frequency is derived from the
set receive frequency of the R&S FSQ using the calculation formula.
For the sake of clarity, the formula is also displayed in the table.
The offset setting can be used to sweep in the reverse direction. This can be
achieved by setting a negative offset in the formula above:
Example for reverse sweep:
FAnalyzerStart= 100 MHz
FAnalyzerStop = 200 MHz
FOffset = -300 MHz
Numerator = Denominator = 1
→ FGeneratorStart = 200 MHz
→ FGeneratorStop = 100 MHz
4.250 Operating Manual 1313.9681.12 - 01