Agilent Technologies 34405A Guide De Démarrage Rapide page 7

9. Using the Math Functions
The 34405A has these math functions: Null, dBm, dB, Min/Max, Limit and Hold. As an
example, Null is commonly used to eliminate the effects of test leads from
measurements. Connect the test leads together and to the HI and LO input terminals.
Select resistance measurements by pressing:
The display should be showing the measured test lead resistance. Typical display:
Range
Null
To select the math Null function, press:
Null
The Null value is measured and subtracted from all resistance readings in the primary
measurement display. The Null value is shown in the secondary display and the Null and
Ref Value annunciators are on. Typical display:
Null
Ref Value
Pressing the same math key again turns the math function off.
34405A Quick Start Guide 7