SOURce:DM SME
1038.6002.02 3.40 E-13
[:SOURce]:DM[:BASic]:DATA:XMEM:LENGth:AUTO ON | OFF
This command switches the automatic length identification in recording the data on or off. The
command is only effective with a data transmission via IEC bus, however, if the data are recorded
from an external source, it is not.
ON The transmitted data specify the length of the data sequence. The instrument adjusts
the value of LENGth accordingly.
OFF LENGth specifies the length of the sequence. The instrument ignores surplus data; if
the data quantity is too small, it copies as many data from the beginning of the
sequence as is necessary to achieve the specified sequence length.
Example::SOUR:DM:BAS:DATA:XMEM:LENG:AUTO OFF *RST value is ON
[:SOURce]:DM[:BASic]:DATA:XMEM:MODE DATA | ALL
This command specifies the memory space allocation.
DATA The memory is 1 bit broad and only contains DATA data. The memory depth is 8
MBit.
ALL The memory is 3 bits broad and contains lists of all three types of data (DATA,
ATTenuate and BURSt) The memory depth is 1 MBit.
Example: :SOUR:DM:BAS:DATA:XMEM:MODE DATA Not changed by *RST
[:SOURce]:DM[:BASic]:DATA:XMEM:RECord
This command starts the recording of external data. The data are directly transferred to the
memory extension, list XMEM. The recording automatically stops when the end address is
reached. The recording can be aborted using command :ABORt:XMEM. The setting under
:DM:BAS:DATA :XMEM:LENG:AUTO has no influence. The external data generator can be
synchronized via the CLOCK output of the SME. The command triggers an event and thus has no
*RST value.
Example: :SOUR:DM:BAS:DATA:XMEM:REC
[:SOURce]:DM[:BASic]:DATA:XMEM:TRIGger ON | OFF
This command switches the external trigger facility on or off.
ON The run of the list is triggered by an external trigger signal. Each trigger signal starts
a new run, which starts with the start address.
OFF The external trigger mode is switched off.
Example: :SOUR:DM:BAS:DATA:XMEM:TRIG OFF *RST value is OFF
:[SOURce]:DM[:BASic]:DATA:XMEM:TRIGger:SLOPe POSitive | NEGative
This command selects the active edge of the external trigger signal.
POSitive The run of the list starts with the positive edge of the trigger signal.
NEGative The run of the list starts with the negative edge of the trigger signal.
Example: :SOUR:DM:BAS:DATA:XMEM:TRIG:SLOP POS *RST value is POSitive
[:SOURce]:DM[:BASic]:PRBS
The commands to set the pseudo random sequence generator are under this node.
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