Agilent Technologies 8504B, User Manual, Page: 99 / 296

FINAL TRIM SIZE : 7.5 in x 9.0 in
P erforming Measurements
Creating Limit Lines
Indications of pass/fail
conditions
Several indications of pass or fail status are provided when limit testing is on:
A PASS or FAIL message is displayed at the right of the display .
The trace vector leading to any measured point that is out of limits is
displayed in a dierent color . It appears normal on a print or plot.
The limit fail beeper sounds if it is turned on.
An asterisk * is shown next to any listed point that is out of limits .
A bit is set in the HP-IB status byte .
N O T E
Limits are checked only at the actual measured data points. If the point density is insucient, a
device can be out of specication without displa ying FAIL . Be sure to specify a suitable number of
measurement points.
Limit lines can be
shifted
Limit lines can be oset horizontally or vertically . This is useful for changing
the limits to correspond with a change in the test setup , or for device
specications that dier in stimulus or amplitude . It can also be used to move
the limit lines away from the data trace temporarily for visual examination of
trace detail.
N O T E
The three oset ke ys (
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
AMPLITUDE OFFSET ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MARKER ! AMP.OFF. , and
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
POSITION OFFSET ) shift the limit segments but do not change the limit values in the table . If
the limit segments look out of place , check to see if the y have been shifted in position or amplitude .
3-22