34410A/11A/L4411A User’s Guide 63
Features and Functions 2
dB Measurements
Applies to ac voltage and dc voltage measurements only.
Each dB measurement is the difference between the input signal and a stored
relative value, with both values converted to dBm.
dB = reading in dBm – relative value in dBm
• The relative value can take any value between 0 dBm and ± 200.0 dBm. The
default relative value is 0 dBm. You can either let the instrument
automatically measure this value, or you can enter a specified value.
• Front Panel Operation: Press
MATH > dB > dB RELATIVE
Select MEASURE or VALUE.
• Select MEASURE if you want the instrument to set the relative value
automatically by measurement. The Math annunciator will light and the
reading will be displayed in dB.
If the configured settings will result in a long measurement time or have
the multimeter waiting for an external trigger, the Math annunciator will
flash until the relative value measurement is taken.
• Select VALUE if you want to enter a specific relative value. Use the
navigation keypad to set the desired dB REL VALUE. The Math annunciator
will light and the reading will be displayed in dB.
You can also select VALUE to view a previously set or measured value.
• Remote Interface Operation: The following command sequence selects the dB
function, turns the function on, and sets a relative value.
CALCulate:FUNCtion DB
CALCulate:STATe ON
CALCulate:DB:REFerence <
value
>
Refer to the Agilent 34410A/11A/L4411A Programmer’s Reference Help for
a complete description and syntax for these commands.
UG_ED5.book Page 63 Thursday, March 1, 2012 11:28 AM
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