Every setup and built-in procedure parameter in the GBT Observer's interface (GO) has a predefined keyword. When a value is assigned to a keyword in a GO table the corresponding parameter(s) are set in hardware or the value is retained for use when a procedure is called. Most keywords have unique names in the system, but some, like bandwidth, are repeated in different devices (spectral processor, spectrometer, etc.). Hence, every keyword is assigned to a group which is designated by a keyword prefix. For example, sp.bandwidth is the bandwidth of the spectral processor. If a keyword applies to only one device, the prefix may be omitted, but the safest thing is to use it. The prefixes assigned so far are listed in Table 1.1.
Keywords may be written in their shortest, unambiguous form, e.g. sp.band, but for table readability it is usually a good idea to use the full name or assign a good alias. The shortened form is better left to interactive assignment on the command line of the GO Table window where conflicts are caught immediately.
|