Instrument Function
R&S
®
SMB100A
174Operating Manual 1407.0806.32 ─ 13
FM Mode
Selects the mode for the frequency modulation.
"Normal"
The maximum range for modulation bandwidth and FM deviation is
available.
"Low Noise"
Frequency modulation with phase noise and spurious characteristics
close to CW mode. The range for modulation bandwidth and FM devi-
ation is reduced (see data sheet).
"High Devia-
tion"
Frequency modulation with full setting range for FM deviation. The
range for modulation bandwidth is reduced (see data sheet).
Remote command:
[:SOURce<hw>]:FM:MODE on page 301
FM Deviation
Sets the modulation deviation in Hz.
The maximal deviation depends on the RF frequency set and the selected modulation
mode (see data sheet). It is possible to enter a deviation that is too high for a certain RF
frequency or to vary the RF frequency to a range in which the deviation can no longer be
set. In this case the maximally possible deviation is set and an error message is displayed.
The deviation of the internal source must not exceed the deviation of the external source
in case of modulation source "Int+Ext".
Remote command:
[:SOURce<hw>]:FM[:DEViation] on page 300
LF Gen Frequency
Sets the frequency of the LF generator.
This setting affects all analog modulations which use the LF generator as the internal
modulation source.
Remote command:
[:SOURce]:LFOutput<ch>:FREQuency on page 311
LF Gen Shape
Selects the waveform shape of the LF signal.
Note: The installed hardware determines the available settings. Use the Hardware Con-
fig dialog to check the hardware the instrument is equipped with.
For information on the required hardware revision, refer to the release notes.
Remote command:
[:SOURce]:LFOutput:SHAPe on page 319
FM Sensitivity
(Source External only)
Displays the input sensitivity of the MOD EXT input in Hz/V.
Modulation
To Next Page
Loading...
