Operation,
Remote Operation
1-2-5
RGS-2000NG TCAS Test Set Operation Manual
139187 / Rev. 500
Page 4
Subject to Export Control. See Cover Page for details.
September 2021
5.1
OVERVIEW
Functional capabilities within the Unit for specific customers are provided by means of customer specific
product keys (for instance UAT functionality although commands are defined, is only enabled for
customers that have hardware and software UAT capability).
:
The “colon” is used to separate the different command categori e s .
;
The “semicolon” is used as a s ub-command separator within a co mmand category.
SP
The “space” is used to separate the sub-commands from the act ual sub-com mand
values. Spaces hav e been used in the command document for readability only those
marked SP should be used in the command. All other spaces should be removed.
CR(\r)
The Carriage Return, “\r“, is used to terminate a command line.
Keywords Keywords are the names of the specific commands or sub- commands (either
pre-defined abbreviations or complete command keywords can be u sed).
Values
Values are the alphanumeric values associated with the sp ecific sub-commands.
//
The “//” is used to add a comment line within the command structure.
Return values:
#
The “#” is used to indicate a measurement value was unavailable.
?
The “?” is used to indicate the command did not complete correctly. The command will
explic itly state if it will return a question mark.
*
The “*” is used to indicate the command completed normally. Th e command will
explic itly state if it will return an asterisk.
!
The “!” is placed in the output buffer when a command syntax error occurs. When using
the GPIB you can query the status byte to see if the D4 bit is set notifying you that
something is waiting in the uni t’s output buffer. See next para graph.
When configuring the GPIB using NI-VISA you can set attributes to flush the output buffer before each
write. This should clear any remaining data such as the “!” from the output buffer.
For proper GPIB operation enable EOI at the end of each write.
The Unit can be serial polled via GPIB to receive status of operation. The status byte received from a
serial poll has the following representation. The value is returned in hex format. A 20 hex (32 decimal)
has bit D5 set indicating “Command Complete/Unit Ready”.
D0
Last Command Syntax Error
D1
Execution Error (Detectable Unit Function F ailure). Bit rese t by GPIB command *CLS.
D2
Not Used
D3
Not Used
D4
Transmitter Queue Not Empty (Data available for GPIB read)
D5
Command Complete/Unit Ready
D6
Not Used
D7
Not Used
:RGS:STATUS?
Command was added after version 17.03.2205 to check this status over Ethernet . T his may be
checked after each write to see if the previous command succeed ed and the unit is ready for
further commands.