Advanced features 29
External triggering
NOTE
External triggering and associated voltage stepping discussed below is available
only via remote with the Model 2306-VS. See Section 6 of the Model 2306
Instruction Manual for more detailed information on these features.
Description
The Model 2306-VS has four rear panel mounted BNC connectors (two inputs and two out-
puts) allowing external triggering and handshaking for both channels. The triggering capability
adds the ability to automatically step through different voltages and take measurements at each
step under the control of external triggering. A typical trigger sequence is shown in
Figure 17
.
(The exact sequence will depend on how the instrument is programmed.)
Figure 17
Typical trigger sequence
The sequence is as follows:
1. Sending TRIG:EXT:ENAB or TRIG:EXT:ENAB:INIT will generate a trigger output
pulse when the instrument is ready for trigger in pulses
2. The trigger input pulse applied to the TRIGGER IN jack is detected.
3. The voltage steps to the next value (if voltage stepping is enabled).
4. The unit waits for the programmed delay period.
5. Measurements are taken (if enabled).
6. The unit outputs the trigger output pulse on the TRIGGER OUT jack to indicate that the
step has been completed.
7. The complete sequence in steps 2-6 repeats for the programmed number of steps
(20 maximum).
Step
Step
Trigger In (2)
Trigger
Out (6)
Trigger In (7)
Trigger In
Trigger
Out
Trigger
Out
Output
Voltage
Delay Meas.
Delay Meas.
Delay = Programmed Delay
Meas. = Measurement Period
Time
Trigger
Out (1)
Step (3)
Delay
(4)
Meas.
(5)
Numbered sequence shown
on first step correspond to
steps in text.
