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3 - 30 USING THE COMBISCOPE INSTRUMENTS
3.4.2.1 Single-shot acquisition
PROGRAM EXAMPLE:
In this example a single-shot trace acquisition is done via channel 1. The trace
bytes are entered as characters in the string response$.
DIM response AS STRING
*
1033 ’
Dimensions trace buffer
CALL Send(0, 8, "
*
RST", 1) ’
Resets the instrument
’
Trigger source becomes IMMediate
’
Number of trace samples becomes 512
’
Number of trace sample bits becomes 16
CALL Send(0, 8, "CONFigure:AC", 1) ’
Configures for optimal AC-RMS settings
CALL Send(0, 8, "INITiate", 1) ’
Initiates single acquisition
CALL Send(0, 8, "
*
WAI;TRACe? CH1", 1) ’
Requests for channel 1 trace data
’
’
Notice the
*
WAI; before TRACe?. The
*
WAI command takes care that the
’
TRACe? CH1 command is executed when the INITiate command is finished.
’
CALL Receive(0, 8, response$, 256) ’
Reads the channel 1 trace data
3.4.2.2 Repetitive acquisitions
PROGRAM EXAMPLE:
In this example 10 trace acquisitions are done via channel 1. The trace bytes are
entered as characters in the string response$. The 10 trace buffers are written to
the file TRACE10 on the hard disk. Triggering is done via the GPIB by sending the
*
TRG command.
DIM response AS STRING
*
1033 ’
Dimensions trace buffer
CALL Send(0, 8, "
*
RST", 1) ’
Resets the instrument
’
Trigger source becomes IMMediate
’
Number of trace samples becomes 512
’
Number of trace sample bits becomes 16
CALL Send(0, 8, "CONFigure:AC (@1)", 1) ’
Configures for optimal AC-RMS settings.
CALL Send(0, 8, "TRIGger:SOURce BUS", 1) ’
Trigger source = GPIB
OPEN "O",#1,"TRACE10" ’
Opens file TRACE10
FOR i=1 TO 10 ’
10 sequential trace acquisitions
CALL Send(0, 8, "INITiate", 1) ’
Initiates an acquisition
CALL Send(0, 8, "
*
TRG", 1) ’
Triggers via the GPIB
CALL Send(0, 8, "
*
WAI;TRACe? CH1", 1) ’
Requests for channel 1 trace
’
’
Notice the
*
WAI; before TRACe?. The
*
WAI command takes care that
’
the TRACe? CH1 command is executed when the INITiate command is finished.
’
CALL Receive(0, 8, response$, 256) ’
Reads the channel 1 trace
PRINT #1, response$ ’
Writes the trace buffer to file
NEXT i ’
Next trace acquisition
CLOSE ’
Closes file TRACE10