Controlling The External Trigger; Trigger Slope; Trigger Level; Trigger Output - HP 8112A Operating, Programming And Servicing Manual

Controlling the
External Trigger
8112A PULSE GENERATOR 50MHz
Caution

Trigger Slope

Trigger Level

Manual Trigger
Single Pulse

Trigger Output

4-6 Operating
Figure 4-3. External Trigger Controls
The external trigger signal required in some trigger modes must be
EXT INPUT
applied to the
Do not apply voltages outside the range f20 V to the EXT INPUT
connector.
Select a positive or negative trigger slope by pressing the a or It]
key respectively. The current slope is indicated by the LED on the
key.
The trigger can be switched off by pressing the currently active key
again. Both key LEDs will then be off.
Trigger level can be varied in the range f10 V using the LEVEL
adjuster.
This key can be used to simulate the external trigger signal.
This key initiates a single pulse in TRIG, GATE, and E.BUR modes.
The trigger output provides a timing reference signal synchronised
to the main output signal. Output levels are 0 and
Delay from trigger input to trigger output is 25 ns.
BNC connector.
2.4
V into 50 S-l.