Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
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3 Features and Functions<br />
Scan Trigger Source<br />
You can configure the event or action that controls the onset of each<br />
sweep through the scan list (a sweep is one pass through the scan list):<br />
You can set the instrument’s internal timer to automatically scan at a<br />
specific interval. You can also program a time delay between channels<br />
in the scan list (see “Channel Delay” on page 120).<br />
You can manually control a scan by repeatedly pressing the<br />
Scan (<strong>Measure</strong>) key from the front panel.<br />
You can start a scan by sending a software command from the remote<br />
interface (MEASure? or INITiate command).<br />
You can start a scan when an external TTL trigger pulse is received.<br />
You can start a scan when an alarm event is logged on the channel<br />
being monitored.<br />
Interval Scanning<br />
In this configuration, you control the frequency of scan sweeps by<br />
selecting a wait period from the start of one trigger to the start of the<br />
next trigger (called the trigger- to- trigger interval). If the scan interval <br />
is less than the time required to measure all channels in the scan list, the<br />
instrument will scan continuously, as fast as possible (no error is generated). <br />
Trigger 1<br />
Sweep 1<br />
Trigger-to-trigger interval<br />
Sweep 2 Sweep n<br />
You can set the scan interval to any value between 0 seconds and<br />
99:59:59 hours (359,999 seconds), with 1 ms resolution.<br />
Once you have initiated the scan, the instrument will continue scanning<br />
until you stop it or until the trigger count is reached. See “Trigger<br />
Count” on page 117 for more information.<br />
Mx+B scaling and alarm limits are applied to measurements during a<br />
scan and all data is stored in volatile memory.<br />
112 <strong>Agilent</strong> <strong>34980A</strong> Mainframe User’s Guide<br />
. . .<br />
Trigger Timer<br />
(0 to 359,999 seconds)<br />
Trigger 2<br />
t