Agilent 34980A  Multifunction Switch/Measure Unit 34980-90005

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3 Features and Functions Scan Trigger Source You can configure the event or action that controls the onset of each sweep through the scan list (a sweep is one pass through the scan list): You can set the instrument’s internal timer to automatically scan at a specific interval. You can also program a time delay between channels in the scan list (see “Channel Delay” on page 120). 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. Interval Scanning In this configuration, you control the frequency of scan sweeps by selecting a wait period from the start of one trigger to the start of the next trigger (called the trigger- to- trigger interval). If the scan interval is less than the time required to measure all channels in the scan list, the instrument will scan continuously, as fast as possible (no error is generated). Trigger 1 Sweep 1 Trigger-to-trigger interval Sweep 2 Sweep n You can set the scan interval to any value between 0 seconds and 99:59:59 hours (359,999 seconds), with 1 ms resolution. Once you have initiated the scan, the instrument will continue scanning until you stop it or until the trigger count is reached. See “Trigger Count” on page 117 for more information. Mx+B scaling and alarm limits are applied to measurements during a scan and all data is stored in volatile memory. 112 Agilent 34980A Mainframe User’s Guide . . . Trigger Timer (0 to 359,999 seconds) Trigger 2 t
Features and Functions 3 The CONFigure and MEASure? commands automatically set the scan interval to immediate (0 seconds) and the scan count to 1 sweep. The instrument sets the scan interval to immediate (0 seconds) after a Factory Reset (*RST command). An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not change the setting. Front Panel Operation: Scan (Configure) > INTERVAL > SCAN INTERVAL To initiate the scan and store all readings in memory, press the Scan (Measure) key. Between scan sweeps, “WAITING FOR TRIG” will be displayed on the front panel. Note: To stop a scan, press and hold the Scan (Measure) key. Remote Interface Operation: The following program segment configures the instrument for an interval scan. TRIG:SOURCE TIMER TRIG:TIMER 5 TRIG:COUNT 2 INIT Note: To stop a scan, send the ABORt command. Manual Scanning Select interval time mode Set the scan interval to 5 seconds Sweep the scan list 2 times Initiate the scan In this configuration, the instrument waits for either a front- panel key press or a remote interface command before sweeping through the scan list. All readings from the scan are stored in volatile memory. Readings accumulate in memory until the scan is terminated (until the trigger count is reached or until you abort the scan). You can specify a trigger count which sets the number of front- panel key presses or scan trigger commands that will be accepted before terminating the scan. See “Trigger Count” on page 117 for more information. Mx+B scaling and alarm limits are applied to measurements during a manual scanning operation and all data is stored in volatile memory. Front Panel Operation: Scan (Configure) > INTERVAL > MANUAL To initiate the scan and store all readings in memory, press the Scan (Measure) key. Note: To stop a scan, press and hold the Scan (Measure) key. Agilent 34980A Mainframe User’s Guide 113
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2 Getting Started 11 To stop the co
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4 Introduction to the Plug-In Modul
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Index date, 153 dc current measurem
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Index 176 Agilent 34980A Mainframe
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Agilent 34980A  Multifunction Switch/Measure Unit *34980-90005*

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Agilent 34980A  Multifunction Switch/Measure Unit 34980-90005