Keysight U3606A, Programmer'S Reference Manual

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2 CALCulate Subsystem
CALCulate:FUNCtion
20 U3606A Programmer’s Reference
CALCulate:FUNCtion
Syntax
CALCulate:FUNCtion {AVERage|DB|DBM|HOLD|LIMit|NULL}
This command selects the calculation function to be used.
•
AVERage
: Returns the mathematical average of all readings taken since
averaging was enabled. Use
CALCulate:AVERage:AVERage?
,
CALCulate:AVERage:MAXimum?
,
CALCulate:AVERage:MINimum?
,
CALCulate:AVERage:COUNt?
, and
CALCulate:AVERage:PRESent?
to return the average, maximum, minimum, count, and last reading
taken respectively, since averaging was enabled.
•
DB
: When enabled, the dB operation computes the dBm value for the
next reading, stores the dBm result into the dB Ref register and
immediately produces the following calculation. The first computed
reading is always precisely 00.000 dB.
Result = 10
×
Log
10
[Reading
2
/ R
REF
/ 0.001 W] – dB Ref
Set a reference value in the dB reference register of the instrument
with the
CALCulate:DB:REFerence
command.
•
DBM
equation: Result = 10
×
Log
10
[Reading
2
/ R
REF
/ 0.001 W]
Set the reference resistance (R
REF
) with the
CALCulate:DBM:REFerence
command.
•
HOLD
: The reading hold feature allows you to capture and hold a stable
reading (refer to the U3606A User’s and Service Guide for details).
Set the variation and threshold values with the
CALCulate:HOLD:VARiation
and
CALCulate:HOLD:THReshold
commands.
•
LIMit
: Compares each reading against upper and lower limits. Limit
failures are posted in the Questionable Status register.
Set the upper and lower limits with
CALCulate:LIMit:UPPer
and
CALCulate:LIMit:LOWer
, respectively. Check for limit failures with
the
STATus:QUEStionable[:EVENt]?
command.
•
NULL
equation: Result = Reading – Offset
Set the Offset using the
CALCulate:NULL:OFFSet
command