7 Save/Recall/Print
7.3 Save
–
.csd files contains the constellation state of all modulation formats
–
.txt files only contains the constellation state of Custom IQ modulation format,
this file format is same as Signal Studio N7608C Custom IQ constellation file
The default path for Constellation State files is:
My Documents\VMA\DDEMOD\ConstlnState
See ".csv file format " on page 2400
Remote
Command
:MMEMory:STORe:DDEMod:SEGMent1|…|6:CONStln:STATe <filename>
Example Save the constellation state data to the file myConstlnState2.csd in the current path:
:MMEM:STOR:DDEM:SEGM1:CONS:STAT "myConstlnState2.csd"
Notes If the save is initiated via SCPI, and the file already exists, the file will be overwritten
Using the C: drive is strongly discouraged, since it runs the risk of being overwritten during an
instrument software upgrade
Both single and double quotes are supported for any filename parameter over SCPI
Status Bits/OPC
dependencies
Sequential - waits for previous measurement to complete
Backwards
Compatibility
SCPI
:MMEMory:STORe:CONStln:STATe <filename>
.csd constellation state file format
!#
!# State definitions for 16 QAM
!#
! "S_16QAM_1","0011","0010","0001","0000"
! "S_16QAM_2","0111","0110","0101","0100"
! "S_16QAM_3","1011","1010","1001","1000"
! "S_16QAM_4","1111","1110","1101","1100"
.txt constellation state file format
This is the same as the N7608C Constellation Setting file format
0,-0.94868,0.94868,0
1,-0.31623,0.94868,1
2,0.31623,0.94868,2
3,0.94868,0.94868,3
4,-0.94868,0.31623,4
5,-0.31623,0.31623,5
6,0.31623,0.31623,6
2410 Vector Modulation Analyzer Mode User's &Programmer's Reference
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