88 Chapter 2 
Front-Panel Key Reference
Display
Test 
On Off
  Turns the testing of the limit lines on 
and off. If the trace is at or within the 
bounds of the set limit or margin, PASS 
LIMIT # or PASS MARGIN # is displayed 
in green in the upper left corner of the 
measurement area where # is the 
number of the selected limit line. 
(Colored annotation appears only with 
a color display.) Only positive margins 
are allowed for lower limits and only 
negative margins are allowed for upper 
limits. If the trace is out of the limit or 
margin boundaries, FAIL LIMIT # or 
FAIL MARGIN # is displayed in red. The 
results for Limit 2 are displayed below 
those for Limit 1. Either 
Limit or Margin 
must be turned on for 
Test to work. 
Key Access: 
Display, Limits, Limit 1 or 
Limit 2
Margin 
On Off
  Margin (Off) turns the margin off. 
Margin (On) allows you to set a limit line 
offset for the selected limit line. Either 
Limit or Margin as well as Test, must be 
turned on for a limit test to work. 
Key Access: 
Display, Limits, Limit 1 or 
Limit 2
Edit
  Accesses the Edit menu keys which 
include 
Point, Frequency (or Time if 
Display, Limits, X Axis Units (Time) has 
been selected), 
Amplitude, Connected to 
Previous Pt
, and Delete Point. Edit also 
accesses the limits table. The Tab keys 
allow you to move between the rows in 
the limits table. New limit segments 
will only be applied after the editor is 
closed. Pressing 
Return, or any key not 
associated with the editor, will close the 
editor. 
Key Access: 
Display, Limits, Limit 1 or 
Limit 2