Features and Functions 2
34405A User’s and Service Guide 37
Math Annunciators
The math Hold, Limit, Null and MnMx annunciators are 
located above the primary display and the dB/dBm 
annunciator is located right of the primary display (see “The 
Display at a Glance” on page 18). The Math Value 
Annunciators are located under the secondary display and 
assist in viewing and editing math values in the secondary 
display. 
Ta ble 1 Math Value Annunciators
Math Operation When Viewing/Editing Editable Math Annunciator
Null Offset
Ref Value
dBm R
REF
Ref R Value
dB dB Ref
Ref Value
MnMx Maximum Max
Minimum Min
Average Avg
Reading Count N
Limit HI Limit
Hi Limit
LO Limit
Lo Limit
34405A users guide.book  Page 37  Saturday, September 2, 2006  3:38 PM