Command Interpretation - Avtech AV-1022-C-AS4 Instructions Manual

10
COMMAND INTERPRETATION
The command may utilize the defined single letter acronym, or may be expanded
to a longer word to make the control program easier to understand. This is because
letters following the defined acronym letter are ignored. For example, a command of
"V2" will cause exactly the same result if the command is sent as "Voltage level of
output pulse = 2". However, it is mandatory that the first letter of each command be
one of the four defined acronyms.
If desired, trailing text may be added to make the control program easier to
understand, since it will be ignored. For example, a command of "delay=0.2" will result
in the same output as the command "delay = 0.2 micro-seconds".
Acronyms are case insensitive, for example, "R" or "r" are the same.
The number following the acronym letter may be any number in the range
specified, however, the number of significant digits are limited to one part in 255 (for 8
bits of output resolution). For example, rep rate values of 128.2, 128.3 or 128.2145 will
all result in the same output. (Note that output resolution and accuracy are not
necessarily the same). Numbers outside the specified ranges will be ignored.
Leading or trailing zeros in numbers will be ignored. Numbers expressed in
"exponential" format will NOT be interpreted correctly. For example, 3e+2 will be
interpreted as 3, not as 300.
If an invalid command is sent, the unit will ignore the command and the previous
value will remain unchanged. If an "out-of-range" value is sent, the unit will also ignore
the command.
TYPICAL COMMAND SEQUENCE INTERPRETATION
Assume the following commands are sent using the computer, using the
appropriate command structure as specified for the user's GPIB controller. Note that
the default GPIB address is eight.
R=100
V=5
D=1
W=2