BIRD THRULINE 4021, Инструкция

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IEEE-488 GPIB Interface
15
Command Syntax
The Bird 4421 accepts two types of commands. General bus
commands are commands, such as Device Clear (DCL), that apply to
any IEEE interfaced device. Device-dependent commands are specific
to the 4421.
If an invalid command is sent to the unit, an error condition is placed
in the serial poll byte and the offending command is not executed.
A group of device-dependent commands can be sent as a single string
as long as like command categories are not repeated, for example:
“PNFCFDT3TRG”. This string sets up the 4421 to send no prefixes,
read forward dBm, make one reading on “TRG”, and triggers a
measurement.
NOTE: Commands can be entered in either upper or lower case.
NOTE: Only the last command entered of each category will be
executed. As a command string is processed by the 4421, each
category of command is stored in a separate location. Two
commands of the same category will be stored in the same
location, so that the second will overwrite and erase the first one.