SME Digital Modulation
1038.6002.02 2.83 E-13
START ADDRESS
Input value of the start address
Input range in mode 8M*1: 1 to 8388478
Input range in mode 1M*3: 1 to 1048558.
IEC-bus command :SOUR:DM:DATA:XMEM:STAR 1
LENGTH
LENGTH Input value of the sequence length.
For a start address = 1 the following applies:
Input range in mode 8M*1: 3 to 8388480
Input range in mode 1M*3: 3 to 1048560.
On increasing the start address, the maximum sequence length is reduced
correspondingly. If the maximum value is exceeded, an error message is
displayed.
IEC-bus command :SOUR:DM:DATA:XMEM:LENG 3
MEM MODE
MEM MODE Selection of the allocation of the memory area.
8M*1 The 8-MBit memory area can only be used for data.
1M*3 The memory area is divided up into DATA, LEV ATT and BURST.
The memory depth is 1 MBit.
IEC-bus command :SOUR:DM:DATA:XMEM:MODE DATA
EXT TRIGGER
Switching on/off the external trigger facility.
ON The run of the list is triggered by the external trigger signal. Each
trigger signal starts a new run beginning with the start address.
OFF The external trigger mode is switched off.
IEC-bus command :SOUR:DM:DATA:XMEM:TRIG ON
EXT TRIGGER
SLOPE
Selection of the active edge of the external trigger signal.
POS The sequence starts with the positive edge of the trigger signal.
NEG The sequence starts with the negative edge of the trigger signal
IEC-bus command :SOUR:DM:DATA:XMEM:TRIG:SLOP POS
RECORD DATA Ð
Starts the recording of data from an external source via the DATA input (cf.
Section "Recording a Data Sequence from an External Source (External
Loading)"). Recording can be effected by means of both an external or internal
clock. The clock can be selected in the CLOCK submenu (cf. Section "QPSK
modulation").
During the time of recording, the note "RECORDING" is displayed on the right
side of the line. When recording has been finished, the note "DONE" is
displayed for a short time.
Note: Recording is only possible if SOURCE EXT is activated.
IEC-bus command :SOUR:DM:DATA:XMEM:REC
ABORT
RECORDING Ð
Aborts a running recording. The note "ABORTED" is displayed at the right
margin of the line for a short time. The data recorded up to the point of time of
the abortion remain in the memory.
IEC-bus command :ABORt:XMEM
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