Filters; Ranges; Data Menu; Get Fifo Count - VTI Instruments EX1000A User Manual

Filters

This entry page is used to define the hardware filter setting for each channel. Each channel's
hardware filter is set by clicking the appropriate radio button under the desired frequency value.
Additionally, all channels can simultaneously be set to the same frequency value by clicking on the
appropriate link. It should be noted that the use of these links does not eliminate the need to click
the Apply button to accept the changes.

Ranges

This entry page is used to define the each channel's input voltage range. Each channel's voltage
range is set by clicking the appropriate radio button under the voltage range value. It should be noted
that the use of these links does not eliminate the need to click the Apply button to accept the changes.
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The Data menu is used to retrieve data from the EX10xxA as well as configure the format of the
data to be acquired.

Get FIFO Count

This status page displays how many pages (scans) worth of acquisition data have yet to be retrieved.

Retrieve Data

This action page extracts and displays one page (scan) worth of acquisition data on a first-in, first-
out (FIFO) basis. If this page is invoked when the FIFO is empty, an error is returned. In order to
provide the maximum reading buffer capacity for future acquisitions, data is deleted from the FIFO
memory upon retrieval.

Continuous Polling

This action page is used to continuously trigger and retrieve one page (scan) of data from the
EX10xxA at a refresh rate of approximately once every three seconds. It is very useful for general
data monitoring, installation debugging, and instrument control familiarization. It cannot, however,
be used to test the trigger system, as it must alter the trigger configuration settings in order to acquire
data. Once continuous polling is initiated, it can be stopped by clicking the Stop Polling button or
a link to another page. Using the button preserves the most recent data screen.
NOTE Use of the Continuous Polling page alters the trigger configuration settings. Any previously entered
configuration settings must be reentered.

FIFO Configuration

This entry page is used to control the data format and overflow behavior of the FIFO memory.
The Report CJC Temperatures control enables the reporting of the CJC temperatures in the
acquisition data. This control does not affect their measurement, only the display of the data. The
CJC temperatures are taken with every scan, regardless of this control. Reported CJC temperatures
are always in units of ºC, regardless of the Temperature Units selection.
The Report Timestamps control enables the reporting of delta timestamps per channel in the
acquisition data. The timestamp represents the time, in increments of 100 ns, between the specific
channel measurement and the scan initiation time.
The Temperature Units selection controls whether the input channel data is returned in units of ºC
or ºF. This setting has no effect on the reported CJC data or data for input channels that are
configured for an EU conversion of mV.
EX10xxA Web Page Operation
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