User`s guide

8-44 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6
Support Functions
Trigger Function
Trigger Input
The 4155C/4156C can receive an edge trigger (TTL level, pulse width
approximately 10 μs) from external instruments via the trigger input terminal, and
initiate a sweep or sampling measurement. Following figure shows examples of
externally-triggered sampling and sweep measurements.
For the trigger polarity, you can select positive or negative.
Figure 8-8 Examples of Externally Triggered Measurements
After you press the
Single, Repeat, or Append front-panel key, the 4155C/4156C waits
for the trigger signal only once. When the 4155C/4156C receives the trigger signal,
the 4155C/4156C starts measurements.
For staircase sweep measurements, you can specify the step delay time shown in
Figure 8-8.