Selecting Trigger Mode; Mode Selection; Trigger Mode Controls - HP 8112A Operating, Programming And Servicing Manual

Selecting Trigger
Mode
8112A PULSE GENERATOR 50MHz
- -
0 TRIG
q u

Mode Selection

-
Figure 4-2. Trigger Mode Controls
The currently active mode is shown by LED indicator. The trigger
mode can be cycled through available options by pressing the key
below the mode indicators.
The standard instrument offers the following trigger modes:
NORM
TRIG
GATE
E.WID
E.BUR
In normal mode a continuous pulse stream is
generated.
In trigger mode each active input edge triggers a
single output cycle.
In gate mode the active level of the external input
signal enables output period. The first output cycle
is synchronous with the active trigger slope. The last
output cycle is always completed.
This mode can be used for recovery of external signal
with selectable transition times and output levels.
In external burst mode each act,ive external trigger
generates a pre-programmed number of pulses (1 to
1999). Minimum time between two bursts is 100 ns.
Operating 4-5