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User Manual 301/302

TRACe

Subsystem

The TRACe subsystem contains

commands, which allow definition of

segments and their corresponding lengths, addition and deletion of

segments, and the loading of waveform data. Sequence commands

control segments link and loops. DMA command places the Model

301/302 in a special data transfer mode where the Model 301/302's

message-based interface is bypassed and data is loaded directly from

the data bus. Optional nodes were omitted from these commands.

Defaults are shown in bold.

Keyword Parameter Form Default,Low Limit,High Limit

:DMA OFF|ON|0|1 OFF

:TRACe #<header><binary_block>

:DEFine <segment_number>,<length>

:DELete <segment_number>

:DELete:ALL

:SELect <segment_number>

:SEQuence

:MODE SSEQuence|MSEQuence SSEQuence

:SSEQuence

:ADVance AUTOmatic|STEP|SINGle AUTOmatic

:SOURce EXTernal|INTernal EXTernal

:DEFine <step_#>,<segment_#>,<#_repeat>

:DELete <ssequence_# >

:DELete:ALL

:SELect <ssequence_# >

:MSEQuence

:SIZE <msequence_size>

:ADVance

:SOURce EXTernal|INTernal EXTernal

:DEFine <step_#>,<ssequence_#>

:DELete <msequence_#>

:DELete:ALL

DMA [OFF] | ON | [0] | 1

Purpose

This command will set the DMA mode.

• ON or 1 will set the DMA mode on

• OFF is set automatically with the high byte’s MSB set to “1”. Sending OFF will not generate an error

message

DMA?

Response

The 302 will return 0 if the DMA is off. This query cannot be used after sending DMA ON.

SCPI Command Reference

103

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