Atek HP 8753D, User Manual, Page: 372 / 677

The System Menu
The 4
SYSTEM
5 key provides access to the system menu. This menu leads to additional menus
which control various aspects of the analyzer system. The following softkeys are located
within the system menu:
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNN
SET CLOCK allows you to produce time stamps on plots and print-outs .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
LIMIT MENU provides access to the limits menu.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TRANSFORM MENU (Option 010 Only) provides access to the transform menu.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
HARMONIC MEAS (Option 002 Only) provides access to the harmonic mode menu.
N NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
INSTRUMENT MODE provides access to the instrument mode menu.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE MENU provides access to the service menu (see the HP 8753D Network Analyzer
Service Guide).
The Limits Menu
This menu can be accessed by pressing
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
LIMIT MENU softkey within the system menu.
Y ou can have limit lines drawn on the display to represent upper and lower limits or device
specications with which to compare the test device . Limits are dened in segments , where
each segment is a portion of the stimulus span. Each limit segment has an upper and a lower
starting limit value . Three types of segments are available: at line , sloping line , and single
point.
Limits can be dened independently for the two channels , up to 22 segments for each channel.
These can be in any combination of the three limit types .
Limit testing compares the measured data with the dened limits , and provides pass or fail
information for each measured data point. An out-of-limit test condition is indicated in ve
ways: with a FAIL message on the screen, with a beep , by changing the color of the failing
portions of a trace , with an asterisk in tabular listings of data, and with a bit in the HP-IB
event status register B . (The analyzer also has a BNC rear panel output that includes this status ,
but is only valid for a single channel measurement.)
Note
The limit test output has three selectable modes . F or more information, refer to
Chapter 2, \Making Measurements ."
Limit lines and limit testing can be used simultaneously or independently . If limit lines are
on and limit testing is o, the limit lines are shown on the display for visual comparison and
adjustment of the measurement trace . However , no pass/fail information is provided. If limit
testing is on and limit lines are o, the specied limits are still valid and the pass/fail status is
indicated even though the limit lines are not shown on the display .
Limits are entered in tabular form. Limit lines and limit testing can be either on or o while
limits are dened. As new limits are entered, the tabular columns on the display are updated,
and the limit lines (if on) are modied to the new denitions . The complete limit set can be
oset in either stimulus or amplitude value .
Limits are checked only at the actual measured data points . It is possible for a device to be out
of specication without a limit test failure indication if the point density is insucient. Be sure
to specify a high enough number of measurement points in the stimulus menu.
6-106 Application and Operation Concepts