Key Reference 5
N9342C/43C/44C User’s Guide 105
Mode
Normal
Key access: [MARKER] > {Normal}
Activates a single frequency marker at the center 
of the active trace if a marker is not already 
displayed. If a marker is displayed before the 
Normal  function is enabled, the marker is enabled 
at the position of the selected marker. The marker 
number is indicated above the marker. The knob 
and/or arrow keys move the marker left or right. If 
a value is entered from the numeric keypad, the 
marker is moved to the trace point nearest to that 
value. Annotation in the active function block and 
in the upper right corner indicates the frequency 
and amplitude of the marker (time and amplitude, 
if in zero span.) Pressing Normal  turns off the Delta 
function and moves the active marker to the delta 
marker position.
Delta
Key access: [MARKER] > {Delta}
Activates a second marker at the position of the 
first marker. (If no marker is present, two markers 
appear at the center of the display). The amplitude 
and frequency (or time) of the first marker is 
fixed. The marker number is indicated above the 
delta marker, and the same number is indicated 
with an R (for example, 1R) above the reference 
marker. Use the data controls to position the delta 
marker. Annotation in the active function block 
and in the upper- right corner of the display 
indicates the frequency (or time) and amplitude 
differences between the two markers. The markers 
will be turned off if the scale type is changed 
between log and linear.
NOTE
Pressing Delta again moves the reference marker to the active 
marker position, so you are allowed to make delta 
measurements from differing reference points without having 
to turn off the makers and begin again.