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Trig Out: Allows an instrument to output a negative-going pulse to indicate the
occurrence of some event such as closing a channel on a Switchbox Instrument.
The signal levels are standard TTL (0V to 5V). This pulse can be used to
synchronize external equipment to the instrument (see Chapter 5 for examples).
You direct the pulse from the appropriate instrument to the Trig Out port using
the OUTP:STAT ON command.
Pacer Out: Allows you to output a square wave signal to trigger or pace external
equipment such as scanners or voltmeters. You can control the period of the
square wave signal and the number of periods output. The signal levels are
standard TTL (0V to 5V). Refer to Chapters 4 and 5 for more information on
the Pacer.
Event In: Allows an instrument to be armed or triggered from an external
negative-going signal. The signal levels are standard TTL (0V to 5V). Use an
instrument’s ARM:SOUR:EXT command or the TRIG:SOUR:EXT command
to direct the Event In port to that instrument.
RS-232: Serial interface provides a user interface using a terminal or a
computer running terminal emulator software. The user interface provides the
functionality of the E1301’s keyboard and display. If present, the optional
IBASIC interpreter can be configured to control the RS-232 port.
Figure 1-1. Mainframe Features
1-2 Getting Started
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