RF Multiplexer Command Reference 45
Chapter 4
Comments
RF Multiplexer Module Model Number:
The SYSTem:CTYPe?
<number>
command returns (for both modules):
HEWLETT-PACKARD,E1472A,0,A.01.00 or
HEWLETT-PACKARD,E1474A,0,A.01.00
where the 0 after E1472A or E1474A is the module serial number (always
0) and A.01.00 is an example of the module revision code number.
Example
Reading the Model Number of Card #1 Module
SYST:CTYP? 1
!Return the model number
SYSTem:ERRor?
SYSTem:ERRor?
returns the error numbers and corresponding error
messages in the error queue of a switchbox. See Appendix C for a listing
of switchbox error numbers and messages.
Comments
Error Numbers/Messages in the Error Queue:
Each error generated by a
switchbox stores an error number and corresponding error message in the
error queue. The error message can be up to 255 characters long.
Clearing the Error Queue:
An error number/message is removed from the
queue each time the SYSTem:ERRor? command is sent. The errors are
cleared first-in, first-out. When the queue is empty, each following
SYSTem:ERRor? command returns 0, “No error”. To clear all error
numbers/messages in the queue, execute the *CLS command.
Maximum Error Numbers/Messages in the Error Queue:
The queue holds a
maximum of 30 error numbers/messages for each switchbox. If the queue
overflows, the last error number/message in the queue is replaced by -350,
“Too may errors”. The least recent error numbers/messages remain in the
queue and the most recent are discarded.
*RST Condition:
*RST does not clear the error queue.
Example
Reading the Error Queue
SYST:ERR?
!Query the error queue, read and
!print the numbers/message
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