User`s guide

14 Agilent 34980A Mainframe User’s Guide
1 Introduction to the 34980A
• You can manually control a scan by repeatedly pressing the Scan
(Measure) key from the front panel.
• You can start a scan by sending a software command from the remote
interface (MEASure? or INITiate command).
• You can start a scan when an external TTL trigger pulse is received.
• You can start a scan when an alarm event is logged on the channel
being monitored.
For more information on scanning, see “Scanning” on page 108.
Scanning With External Instruments
If your application doesn't require the built- in measurement capabilities
of the 34980A, you can order the mainframe without the internal DMM.
In this configuration, you can use the 34980A for signal routing or
control applications. If you install a multiplexer plug- in module, you can
use the system for scanning with an external instrument. You can
connect an external instrument such as a DMM to the multiplexer's COM
terminals (see below) or you can connect to the 34980A's analog buses.
Input
Channels
Common Terminals
(COM)
L
H
External DMM