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4-11 MARKERS/LIMITS
KEY-GROUP
The individual keys within the Markers/Limits key-group are de
-
scribed below. The menu flow for the Marker Menu key is shown in
Figure 4-15 on the following page. Full descriptions for these menus
can be found in the alphabetical listing (Appendix A) under the menu’s
call letters (M1, M2, M3, etc.)
Marker Menu Key: Pressing the Marker Menu key calls Menu M1. This
menu lets you toggle markers on and off and set marker frequencies,
times, or distances.
Readout Marker Key: Pressing this key calls different menus, depend
-
ing upon front panel key selections, as described below:
q
It calls menu M1 if there are no markers available within the se
-
lected frequency range
q
It calls menu M3 if no Delta ref marker has been selected
q
It calls menu M4 if the DReference mode is off and the selected
marker is in the current sweep range (or time/distance)
q It calls menu M5 if the DReference mode and marker are both on
and the DReference marker is in the selected sweep range (or
time/distance)
q It calls menu M6 if ACTIVE MARKER ON ALL CHANNELS has
been previously selected in menu M9
q It calls menu M7 if SEARCH has been previously selected in
menu M9
q
It calls menu M8 if FILTER PARAMETER has been previously
selected in menu M9
Limits Key: Pressing this key calls the appropriate Limit menu based
on the graph type selected using the Graph Type key and menu.
Marker Readout Functions: This menu choice, which appears on sev
-
eral marker menus, provides for several filter-related measurements.
It also allows for performing a marker-value search and for reading
the active marker value on all displayed channels.
Limit Frequency Readout Function: The 37xxxE has a
Limit-Frequency Readout function. This function allows frequency
values to be read at a specified level (such as the 3 dB point) on the
data trace. This function is available for all rectilinear graph-types.
The graph-type and their menu call letters are listed below:
MARKERS/LIMITS KEY-GROUP FRONT PANEL OPERATION
4-36 37xxxE OM
q
Log Magnitude, Menu LF1
q
Phase, Menu LF2
q
Group Delay, Menu LF3
q
Linear Magnitude, Menu LF4
q
SWR, Menu LF5
q
Real, Menu LF6
q
Imaginary, Menu LF7
q
Power Out, Menu LF8
q
Real, Menu LF6
q
Imaginary, Menu LF7
q
Power Out, Menu LF8
NOTE
Full menu descriptions can
be found in the alphabetical
listing (Appendix A)under the
menu call letters (LF1, LF2,
LF3, etc.)