Agilent Technologies 3458A User Manual page 202

MMATH
Remarks
202 Chapter 6 Command Reference
Power-on register values = a11 registers are set to 0 with the following
exceptions:
•
Any enabled post-process math operations except STAT and PFAIL are
performed on each reading as it is removed or copied from reading memory to
the display or the GPIB output buffer. (The readings in memory are not altered
by any post-process math operation.) The STAT or PFAIL post-process math
operations are performed using the readings in memory immediately after
executing the MMATH command. (The STAT and PFAIL operations are not
updated for any additional readings placed in memory after executing the
MMATH command.)
•
For the STAT operation, results are stored in the SDEV, MEAN,
NSAMP,UPPER, and LOWER math registers (refer to the RMATH command
for information on these registers).
•
For the PFAIL operation, whenever an out of limit reading is detected, bit
number 1 in the status register is set (this sets the GPIB SRQ fine if enabled by
the RQS command) and the display shows the FAILED LOW or FAILED HIGH
message.
•
An enabled post-process math operation remains enabled until you set MMATH
OFF, enable a real-time math operation (MATH command), or execute the
MMATH command specifying another math operation (except as described in
the following remark).
•
When MMATH is executed from the front panel, the result goes to the display
only. When MMATH is executed from remote, the result goes to the output
buffer only.
•
When two post-process math operations are enabled, operation_a is performed
on the reading first. Next, operation_b is performed on the result of the first
operation.
•
When a post-process math operation is enabled, the display's half digit becomes
a full digit. For example, if you are making 4.5 digit AC voltage measurements
and then enable the SCALE operation, the display is capable of showing 5 full
digits.
•
Math registers may be written to with the SMATH command. Math registers
may be read with the RMATH command.
•
Query Command. The MMATH? query command returns two responses
(separated by a comma) which indicate the currently enabled post-process math
functions.
DEGREE = REF = 1
20
SCALE = 1 RES = 50
PERC = 1