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8.2 Operations
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Command
tree
:SYST:TIME 10,20,30;:SYST:BEEPER ON
:SYST:TIME 10,20,30;BEEPER ON
Data format
NR1 format: integer data
(Examples)
+15, -20, 25
NR2 format: fixed point numbers
(Examples)
+1.23, -4.56, 7.89
NR3 format: floating point numbers
(Examples)
+1.0E-3, -2.3E+3
NRf format
When multiple compound command messages are sent to the 7075, if there
is no colon (:) in the header following the semi-colon (;) separator, the
header of the latter command is considered to be the same as that before the
previous colon. (As this construction is similar to the concept of the current
directory in Unix and MS-DOS directory structures, we call the previous
header the current path.)
Both examples set the internal clock to 10:20'30" and then enable the beeper.
In the first case, a colon follows the semicolon, so the current path is from
the root, and the command search in the 7075 begins at the root. In the
second case, the current path of "SYS:TIME 10,20,30" is ":SYST", so the
following ":BEEPER" command can omit ":SYST".
The 7075 uses character data, decimal data and character string data.
Character data
The first character must be alphabetic. The characters after the first character
can only be alphabetic characters, numerals, or underline characters (_). As
alphabetic characters, during sending only upper case letters are used, but
during receiving both upper case and lower case letters are permitted.
Decimal data
Decimal data values are represented in what is termed NR format.
There are three types of NR format from NR1 to NR3, and each of these can
appear as either a signed number or an unsigned number. Unsigned
numbers are taken as positive.
Further, if the accuracy of a numerical value exceeds the range with which
the 7075 can deal, it is rounded off. (5 and above is rounded up; 4 and
below is rounded down.)
The term "NRf format" includes all these three formats.
When the 7075 is receiving it accepts NRf format, but when it is sending it
utilizes whichever one of the formats NR1 to NR3 is indicated in the
particular command.
Character string data
The data is composed of 7 bit ASCII characters and character string data is
enclosed within quotation marks. When the 7075 is sending, only the double
quotation mark (") is used as a quotation mark, but when receiving both this
double quotation mark and also the single quotation mark (') are accepted.
Characters which cannot be handled by the 7075 are replaced by spaces.
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