Rohde & Schwarz FSW Series, User Manual

Page: 77 / 371

Configuration
R&S
®
FSW-K7
77 User Manual 1173.9240.02 ─ 17
With this offset, attenuators or amplifiers at the output connector of the external gener-
ator can be taken into account for the displayed output power values on screen or dur-
ing data entry, for example. Positive offsets apply to an amplifier and negative offsets
to an attenuator subsequent to the external generator.
Remote command:
SOURce:
​
POWer[:
​
LEVel][:
​
IMMediate]:
​
OFFSet
​
on page 222
Source Frequency Coupling
Defines the frequency coupling mode between the R&S FSW and the generator.
For more information on coupling frequencies see chapter 4.7.4.7, "Coupling the Fre-
quencies" , on page 43.
"Auto" Default setting: a series of frequencies is defined (one for each
sweep point), based on the current frequency at the RF input of the
R&S
FSW (see "(Automatic) Source Frequency (Numerator/Denomi-
nator/Offset)" on page 77); the RF frequency range covers the cur-
rently defined span of the R&S FSW (unless limited by the range of
the signal generator)
"Manual" The generator uses a single fixed frequency, defined by (Manual)
Source Frequency which is displayed when you select "Manual" cou-
pling.
Remote command:
SOURce:
​
EXTernal:
​
FREQuency:
​
COUPling[:
​
STATe]
​
on page 220
(Manual) Source Frequency
Defines the fixed frequency to be used by the generator.
Remote command:
SOURce:
​
EXTernal:
​
FREQuency
​
on page 220
(Automatic) Source Frequency (Numerator/Denominator/Offset)
With automatic frequency coupling, a series of frequencies is defined (one for each
sweep point), based on the current frequency at the RF input of the R&S
FSW.
However, the frequency used by the generator may differ from the input from the
R&S
FSW. The RF frequency may be multiplied by a specified factor, or a frequency
offset can be added, or both.
Note: The input for the generator frequency is not validated, i.e. you can enter any val-
ues. However, if the allowed frequency ranges of the generator are exceeded, an error
message is displayed on the R&S
FSW and the values for Result Frequency Start and
Result Frequency Stop are corrected to comply with the range limits.
The value range for the offset depends on the selected generator. The default setting
is 0 Hz. Offsets <> 0 Hz are indicated by the "FRQ" label in the channel bar. Negative
offsets can be used to define reverse sweeps.
Input and Frontend Settings