Fluke PM-3384B, PM-3380B Number of trace points for all, Requests M23 trace, Reads M23 trace

4 - 114 COMMAND REFERENCE

Description:

Defines the trace length (number of trace points) for all traces. The acquisition length and the length of all internal traces is programmed to the value specified in <acquisition_length>. If the <acquisition_length) parameter is omitted, the default value of 512 is assumed. If the oscilloscope is in the analog mode, error -221 "Settings conflict;Digital mode required" is generated.

Limitations:

For the PM33x0B CombiScope instruments:

-CH3 and Mi_3 is not applicable.

-CH4 is the external trigger view channel, so:

•EXTernal is the alias for CH4.

•Mi_E is the alias for Mi_4.

Coupled values:

There exists a coupling between programming of the sweep time and the number of trace points (acquisition length). The coupling is one way, i.e., the sweep time changes if the acquisition length changes.

Example:

The number of trace points is 2048.

-Send → SENSe:SWEep:TIME .04 The sweep time becomes 40.9 ms.

-Send → TRACe:POINts M1_1,4096 The number of trace points becomes 4096.

-Send → SENSe:SWEep:TIME?

The response is 819E-04, which means that the sweep time was doubled to 81.9 milliseconds.

CAUTION: If the acquisition length is programmed to a different value, all acquisition and register trace memories are cleared. So, all previously defined traces are lost!

Example:
Send → TRACe:POINts CH1,8192	Number of trace points for all
Send → TRACe? M2_3	trace memories becomes 8192.
	Requests M2_3 trace.
Read ← <block_data>	Reads M2_3 trace.

Front panel compliance:

The TRACe:POINts command is the remote equivalent of the front panel ACQ LENGTH option of the TB MODE menu.