l Logged data is preserved after a power cycle. A time-stamped event is logged each time power is
turned on.
Logged Data
The following output measurements are automatically logged per data record:
Average voltage Average current Average power
Maximum voltage Maximum current Maximum power
Minimum voltage Minimum current Minimum power
Status bits and events are also logged into the BBR. Refer to Questionable Status Group for status
definitions. You can select the status items using the Power Assistant software.
BBR Status
To check the status of the Black Box Recorder:
Front Panel Menu Reference SCPI Command
Select System\BBR\Status
A message displays the BBR status.
SYST:BBR:STAT?
Returns true if the BBR is logging.
When the BBR drive has been removed from the access port on the bottom of the chassis, the status
message indicates: “BBR is enabled but drive was not detected. If removed, disable to stop error
messages”. To disable subsequent self-test errors and remove the BBR option from the instrument's
option list, press the Disable button that appears on the display. The status message will then
indicate "BBR is not installed".
BBR Period
To specify the logging period:
Front Panel Menu Reference SCPI Command
Select System\BBR\Period
Select either 10 ms or 100 ms.
SENS:BBR:PER 0.1
Specifies a period of 100 ms.
BBR Length
To return the length of the BBR data:
Front Panel Menu Reference SCPI Command
Select System\BBR\Snapshot
The length of the BBR data in hours is displayed in the
Logged Data field.
SYST:BBR:TIME?
Returns length of the BBR data in seconds.
Keysight N6900/N7900 Series Operating and Service Guide 163
4 Using the Advanced Power System
To Next Page
Loading...
Need help?
General
