HP 8753E User Manual page 300

Trigger Menu
The trigger menu is used to select the type and number of groups for the sweep trigger. The
following is a description of the softkeys located within this menu:
The notation "Hid" is displayed at the left of the graticule. If the 1 indicator is on at the left
side of the display, trigger a new sweep with '2$&3&A$.
mode. This function can be used to override the test set hold mode (indicated by the
notation "tsH" at the left of the screen). In this mode, the electro-mechanical transfer
switch (Option 007) and attenuator are not protected against unwanted continuous switching.
This occurs in a full two-port calibration, in a measurement of two different parameters
that require power out from both ports, or when the primary channels are uncoupled and a
different power level is set for each channel.
If averaging is on, the number of groups should be at least equal to the averaging factor
selected, to allow measurement of a fully averaged trace. Entering a number of groups resets
the averaging counter to 1.
continuously and the trace is updated with each sweep.
. . . . . . . . . . . ~::::,;._. __.
that is connected to the rear panel EXT TRIGGER input. The sweep is started with a high
to low transition of a TI'L signal. If this key is pressed when no external trigger signal is
connected, the notation "Ext" is displayed at the left side of the display to indicate that
the analyzer is waiting for a trigger. When a trigger signal is connected, the "Ext" notation
is replaced by the sweep speed indicator either in the status notations area or on the trace.
External trigger mode is aIlowed in every sweep mode.
sweep.
. . . . _
this softkey triggers each measurement. The annotation "man" appears at the left side of
the display when the instrument is waiting for the trigger to occur This feature is useful in a
test sequence when an external device or instrument requires changes at each point.
Application and Operation Concepts