3 Short-Range Comms & IoT Mode
3.7 ACP Measurement
:TRACe[n]:MODE was formerly used to set the type or “writing mode” of the trace. At that time, View
and Blank were writing modes. The new :TRACe:TYPE command should be used in the future, but
:TRACe:MODE is retained to provide backwards compatibility
In X-Series, unlike earlier instruments, Max Hold and Min Hold now obey the Average Number and
counts up to a terminal value as Average always has
As the Average/Hold Number now affects Min Hold and Max Hold, the operations that restart Averaging
(for example, the Restart key) now also restart Min Hold and Max Hold
As a result of these changes, legacy code that restarts averaging while retaining a running Max Hold
will need to be rewritten, because the Max Hold will now restart when the Average does
Also, previous to X-Series:
–
Pressing Max Hold while already in Max Hold (or doing so remotely) had no effect. Now it will clear
the trace and restart the sweep and the Max Hold sequence
–
Changing the vertical scale (Log/Lin or dB/div) of the display restarted Max Hold and Min Hold. This
is no longer the case
Preset
OFF
State Saved The state of Average is saved in Instrument State for ghosting purposes
Backwards
Compatibility
SCPI
[:SENSe]:AVERage[:STATe] ON | OFF | 1 | 0
[:SENSe]:AVERage[:STATe]?
Backwards
Compatibility
Notes
Previous to X-Series, Averaging (also sometimes known as trace averaging) was global to all traces,
that is, it was either on or off for all active traces. The legacy command [:SENSe]:AVERage
[:STATe] ON|OFF|1|0 was used to turn Averaging on or off
In X-Series, Averaging is turned on or off on a per-trace basis, so it can be on for one trace and off for
another
For backwards compatibility, the old global Average State variable is retained solely as a legacy
variable, turned on and off and queried by the legacy command [:SENSe]:AVERage[:STATe]
OFF|ON|0|1. When Average is turned on, any trace in Clear/Write will get put into Average. While
Average is on, any trace put into Clear/Write by the old :TRAC:MODE command will instead get put
into Average. When Average is turned off, any trace in Average will get put into Clear/Write
Trace Type Details
Clear/Write
Each trace update replaces the old data in the trace with new data.
Pressing Clear/Write for the selected trace, or sending :TRAC:TYPE WRIT for the
specified trace, sets the trace type to Clear/Write and clears the trace, even if you
are already in Clear/Write. Then a new sweep is initiated. Trigger conditions must be
met before the sweep actually starts, and if in Single the sweep won’t start until
Restart is pressed.
Short Range Comms & IoT Mode User's &Programmer's Reference 991
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