Hello,
I am trying to synchronize the digitizing of two 3458A multimeters. What I have tried to do is set the first one to send EXTOUT APER -signal to the other multimeters ext trig -connecter when the first one starts digitizing. The first one is triggering ok, but the other is triggering the measurement almost randomly. I am trying to measure phase between the signals. The extout aper -signal seems to apper correctly when the first multimeter starts digitizing (checked with an oscilloscope).
Simplified sample code (without dcv-range, sweep and aper commands)
*DMM1:*
PRESET DIG;
TARM HOLD;
MEM FIFO;
MFORMAT DINT;
OFORMAT DINT;
LEVEL 0,DC;
EXTOUT APER;
*DMM2:*
PRESET DIG;
TARM HOLD;
MEM FIFO;
MFORMAT DINT;
OFORMAT DINT;
TRIG EXT;
MEM FIFO;
TARM SGL;
*DMM1:*
MEM FIFO;
TARM SGL;
...read DMM1 results here...
*DMM2:*
...read DMM2 results here...
Any suggestions?
I am trying to synchronize the digitizing of two 3458A multimeters. What I have tried to do is set the first one to send EXTOUT APER -signal to the other multimeters ext trig -connecter when the first one starts digitizing. The first one is triggering ok, but the other is triggering the measurement almost randomly. I am trying to measure phase between the signals. The extout aper -signal seems to apper correctly when the first multimeter starts digitizing (checked with an oscilloscope).
Simplified sample code (without dcv-range, sweep and aper commands)
*DMM1:*
PRESET DIG;
TARM HOLD;
MEM FIFO;
MFORMAT DINT;
OFORMAT DINT;
LEVEL 0,DC;
EXTOUT APER;
*DMM2:*
PRESET DIG;
TARM HOLD;
MEM FIFO;
MFORMAT DINT;
OFORMAT DINT;
TRIG EXT;
MEM FIFO;
TARM SGL;
*DMM1:*
MEM FIFO;
TARM SGL;
...read DMM1 results here...
*DMM2:*
...read DMM2 results here...
Any suggestions?