R&S SMB100A Operating Manual page 220

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R&S SMB100A
Adjust FM Offset
Starts the adjustment for the FM/PhiM modulator. The option is adjusted concerning
DC-offset.
Remote command:
:CALibration<hw>:FMOFfset[:MEASure]?
FM External Coupling
(Source "External" only)
Selects the coupling mode (AC or DC) for the externally applied frequence modulation
signal.
Note: Coupling for external feed via input MOD EXT can be set independently for all
modulations using the external modulation signal.
"AC"
"DC"
Remote command:
[:SOURce<hw>]:FM:EXTernal:COUPling
Ext. Impedance
(Source "External" only)
Sets the impedance for the external modulation signal, applied at the MOD EXT con-
nector.
You can select 600 Ohm or high (>100 kOhm).
This setting affects all analog modulations which use the external modulation signal.
Remote command:
[:SOURce<hw>]:INPut:MODext:IMPedance
Ignore Overvoltage Warning
Suppresses warnings the instrument generates when the modulation signal input is
overloaded.
This function prevents a warning caused by signals, that generally comply with the
specification, but temporarily overload the input, for example due to spikes. The warn-
ing is suppressed in the history, and in the error queue.
Note: This setting is not affected by an instrument preset (PRESET key), *rst or the
Save/Recall function. Only the factory preset resets (enables) this setting.
Remote command:
[:SOURce<hw>]:INPut:MODext:WIGNore
Operating Manual 1407.0806.32 ─ 21
Disconnects the DC voltage component and uses only the AC com-
ponent of the modulation signal.
Uses the modulation signal with both components, AC and DC.
Instrument Function
on page 286
on page 337
on page 347
on page 348
Modulation
205