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System Functions
System
Last State
Sets Power On to Last. When the analyzer is powered on, it will put all modes in the last state they were
in prior to when the analyzer was put into Power Standby and it will wake up in the mode it was last in
prior to powering off the instrument. The saving of the active mode prior to shutdown happens behind
the scenes when a controlled shutdown is requested by using the front panel power Standby key or by
using the remote command SYSTem:PDOWn. The non-active modes are saved as they are deactivated
and recalled by Power On Last State.
NOTE An instrument can never power up for the first time in Last.
If line power to the analyzer is interrupted, for example by pulling the line cord
plug or by switching off power to a test rack, Power On Last State may not work
properly. For proper operation, Power On Last State depends on you shutting
down the instrument using the Standby key or the SYSTem:PDOWn SCPI
command. This will ensure the last state of each mode is saved and can be recalled
during a power up.
Mode: All
Example: SYST:PON:TYPE USER
Readback Text: User Preset
Backwards Compatibility Notes: Power On User Preset will cause the instrument to power up in the power-on
mode, not the last mode the instrument was in prior to shut down. Also,
Power On User Preset will User Preset all modes. This does not exactly
match legacy behavior.
Initial S/W Revision: Prior to A.02.00
Key Path: System, Power On
Mode: All
Example: SYST:PON:TYPE LAST
Notes: Power on Last State only works if you have done a controlled shutdown prior
to powering on in Last. If a controlled shutdown is not done when in Power
On Last State, the instrument will power up in the last active mode, but it may
not power up in the active mode’s last state. If an invalid mode state is
detected, a Mode Preset will occur. To control the shutdown under remote
control use the :SYSTem:PDOWn command.
Readback Text: Last State
Backwards Compatibility Notes: It is no longer possible to power-up the analyzer in the last mode the analyzer
was running with that mode in the preset state. (ESA/PSA
SYST:PRESET:TYPE MODE with SYST:PON:PRESET) You can power-on
the analyzer in the last mode the instrument was running in its last state
(SYST:PON:TYPE LAST), or you can specify the mode to power-up in its
preset state (SYST:PON:MODE <mode>).