Rohde & Schwarz 1094.0006.50, Operating Manual

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CTS55 Performance Test
1094.0006.55 13.3 E-1
13.4 Remote Control of Performance Test Program
The performance test program allows not only manual checking of test points, it can also be remote-
controlled via an RS-232 interface. In this case the whole hardware-supported level and frequency
range can be tested. Signalling is not possible however.
Remote control is only possible under the menu item "Remote control". To simplify sequence
generation, commands can also be entered via the AT keyboard and confirmed with <ENTER>.
Remember, however, that keyboard entries disable RS-232 transmission which can be enabled again
with the <ENTER> key. A "hung-up" RS-232 system may also be unblocked by means of the <ENTER>
key.
The remote-control mode is terminated with the ’end’ command (see list of commands).
13.4.1 Hardware
A null-modem cable with hardware handshake is used. The baud rate can be set with command line
parameter [-bx] with x being the baud rate, eg -b4800. Rates above 9600 baud are not recommended.
13.4.2 Command syntax
The command structure is similar to that of IEEE-bus control. A command consists of a command string
and, where applicable, a parameter. No difference is made between upper- and lower-case characters.
Command string and parameter are separated by at least one space (20hex), the command is
terminated by a carriage return (0Dhex).
Parameters in <> brackets are given as numeric values without a unit.
Numeric format: with or without decimal point, with or without exponent.
Example: 800 800.0 8.0e2 8.e2
Code words used as a parameter: code words are preset and cannot be changed.
Example: off on auto
The response consists of a string beginning with OK or ERROR. Further characters are added after a
space, the whole string is terminated by a carriage return (0Dhex).
Basically, an additional string may be added to ERROR for detailed error description.
Measurement commands: the OK is followed by a numeric value without unit, which is the measurement
result.
Numeric format: see input parameters.
Note: ERROR messages are also possible.