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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Introduction to the <strong>34980A</strong> 1<br />
The figure below shows the external connections required to synchronize<br />
the scan sequence between the <strong>34980A</strong> and an external instrument. The<br />
<strong>34980A</strong> must notify the external instrument when a relay is closed and<br />
fully settled (including channel delay). The <strong>34980A</strong> outputs a Channel<br />
Closed pulse. In response, the external instrument must notify the<br />
<strong>34980A</strong> when it has finished its measurement and is ready to advance to<br />
the next channel in the scan list. For more information, see “Scanning<br />
With External Instruments” on page 129.<br />
ABus1 HI<br />
ABus2 HI<br />
ABus3 HI<br />
ABus4 HI<br />
Analog Bus Connector Ext Trig Connector<br />
9<br />
6<br />
5<br />
1<br />
ABus1 LO<br />
ABus2 LO<br />
ABus3 LO<br />
ABus4 LO<br />
Channel Advance<br />
(In)<br />
GND<br />
Channel Closed<br />
(Out)<br />
<strong>34980A</strong> Mainframe<br />
<strong>Agilent</strong> <strong>34980A</strong> Mainframe User’s Guide 15<br />
6<br />
9<br />
1<br />
5<br />
External<br />
DMM<br />
VM Complete Out Ext Trig In
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