SYSTem:PRESet
Syntax
SYSTem:PRESet
Description
This command presets the mainframe and all installed modules to a known configuration. See Instrument Preset State for a complete listing of the instrument's Preset configuration.
Remarks
On the 34945A Microwave Switch/Attenuator Driver, this command resets all channels on a remote module to their default states as specified by the ROUTe:CHANnel:DRIVe:OPEN:DEFault command and sets all channel drives to the specified boot state (see ROUTe:RMODule:DRIVe:SOURce:BOOT command). In addition, when the *RST command is executed, the 34945A automatically re-evaluates all external remote module connections to determine what is connected, what is powered, etc. No other settings are changed.
On the 34945A Microwave Switch/Attenuator Driver, the time required to complete a preset may be significant depending on the specified pulse width (see ROUTe:CHANnel:DRIVe:PULSe:WIDTh command) and power supply recovery time (see ROUTe:CHANnel:DRIVe:TIME:RECovery command). If both values are set to their upper limits (255 ms each) for all channels, the time required to preset (or boot) the module may exceed 30 seconds:
64 Channels x (255 ms Pulse Width + 255 ms Recovery Time) = ~33 seconds
Example
The following command presets the instrument.
SYST:PRES
See Also
ROUTe:CHANnel:DRIVe:PULSe:WIDTh (34945A only)
ROUTe:CHANnel:DRIVe:TIME:RECovery (34945A only)