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HP 61010A Owner's Manual
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UPDATE * determines the moment when the input data isread by the Digital Input. When AUTO is selected, theinput data bits are continuously monitored and the displayarea in the Interactive Instrument Window is updatedaccordingly. When MANUAL is selected, a START fieldimmediately appears under the MANUAL field (see Figure3-2). Data is read into the Digital Input only when theSTART field is selected.When the Digital Input appears in the System ViewWindow, the input display will not be updated ifMANUAL update is selected. The letter "M" appears nextto the Digital Input's label in the System View Window toremind you that it is in manual update mode. SelectAUTO update if you want the input display to updatewhen the Digital Input is in the System View Window.Synchronous Operating your Digital Input synchronously requires thatOperation an external device signals the Digital Input to indicate thatinput data is valid. After the Digital Input reads the data,it returns a signal to the external device to indicate that ithas successfully received the information. Two controlsignals — Input Data Available and Input Data Accepted— are available at the input connector, both of which mustbe connected to your external equipment (refer to Chapter4). Once the connections are made, you are ready tooperate your Digital Input synchronously.The front panel graphics already discussed (i.e. base, setcompl, logic sense, length, start, threshold, and updatefields) operate exactly the same way in synchronous modeas they do in asynchronous mode. The only additionalfields that are used when operating your instrumentsynchronously are the handshake and reset fields (seeFigure 3-2).3-6 Manual Instrument Control |
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