1 Power Sensor Remote Operation
32 U2000 Series Programming Guide
• Free Run: When a channel is in Free Run, it continuously takes
measurements. A measurement is in free run when INITiate:CONTinuous
is set to ON and TRIGger:SOURce is set to IMMediate.
• Triggered Free Run: When a channel is in Triggered Free Run Continuous
Trigger, it takes a new measurement each time a trigger event is detected. A
channel is in Triggered Free Run Continuous Trigger when
INITiate:CONTinuous is set to ON and TRIGger:SOURce is not set to
IMMediate.
• Single Shot: When a channel is in Single Shot, it takes a new measurement
when a trigger event is detected and then returns to the idle state. A
channel is in Single Shot when INITiate:CONTinuous is set to OFF. Note
that a measurement can take several EXT triggers depending on the filter
settings. Refer to “TRIGger[1]:DELay:AUTO <boolean>” on page 275 for
further information.
Trigger with Delay
This can be achieved using the same sequences above (apart from the second)
with TRIG:DEL:AUTO set to ON. Also, the MEAS? command operates in trigger
with delay mode.
In trigger with delay mode, a measurement is not completed until the power
sensor filter is full. In this way, the reading returned is guaranteed to be
settled. In all other modes, the result returned is simply the current result
from the filter and may or may not be settled. This depends on the current
length of the filter and the number of readings that have been taken since a
change in power level.
With trigger with delay enabled, the measurement speed can be calculated
roughly using the following equation:
readings/sec = speed (as set by [SENSe[1]]:MRATe)/ filter length
A trigger event can be any of the following:
• The input signal meeting the trigger level criteria.
• Auto-level triggering being used.
•A TRIGger[1][:IMMediate] or *TRG command being sent.
• An external TTL level trigger being detected.
To Next Page
Loading...
Need help?
General
