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Operating the Meter Using the Computer Interface
How the Meter Processes Input
5
5-9
• RULE 2: READ QUERY RESPONSES BEFORE SENDING ANOTHER
COMMAND STRING.
Output data remains available in the output buffer until it is read by the host or until
the next command string is received by the meter. This means the meters output
buffer must be read by the host before, rather than after, the next command string is
sent to the meter.
• RULE 3: THE METER EXECUTES EACH COMMAND COMPLETELY, IN THE
ORDER RECEIVED, BEFORE MOVING ON TO THE NEXT
COMMAND.
If an input string contains a trigger, enter the commands in the following order, that
is, from left to right, as written:
1. Commands to configure the meter (if any).
2. The trigger command.
3. Commands to read the result of a triggered measurement (VAL?), or to recon-
figure the instrument (if any).
4. The terminator.