Selecting Polarity Of External Trigger Input Signal - Agilent Technologies 4294A Operating Manual

Selecting Polarity of External Trigger Input Signal

You can specify the polarity of the signal given to the external trigger input terminal on the
rear panel by following the procedure below.
Step 1. Press the
Step 2. Press the
Step 3. Press the
(pressing the key toggles the selection).
Softkey label
EXT POLRTY [POS]
EXT POLRTY [NEG]
NOTE See Chapter 10 , "Specifications and Supplemental Performance Characteristics," on page
323 for characteristics of the signal required for the external trigger (triggering with signal
given to the external trigger terminal on the rear panel).
Chapter 5
Selecting Polarity of External Trigger Input Signal
key to display the trigger menu.
[Trigger]
key to display the trigger source menu.
SOURCE [ ]
key to select the polarity of the external trigger input signal
EXT POLRTY [ ]
Setting Measurement Conditions
Selected polarity of external trigger signal
Positive (leading edge of TTL signal is
detected for triggering)
Negative (trailing edge of TTL signal is
detected for triggering)
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