Daq Pacer Clock - Intrepid Control Systems neoVI Hardware Help

Intrepid Hardware Help
DA Q Pacer Clock - neoVI
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Overview
The neoVI device can generate a clock (figure 1) on the
program m able between 1.25 Khz and 2.5 Mhz (See table 1 for frequencies).
The neoVI devices tim estam ps the ex act start tim e of the pulses. This start tim estam p provides a m ark er to com pare data from the DAQ board and the neoVI.
How to use it
The following list of steps shows how to use this feature:
Step 1 : W ire the MISC 2 signal to the DAQ card ex ternal clock input
Step 2 : Setup the MISC 2 Signal as a digital output
Step 3 : Start Monitoring the network
Step 4 : Start the DAQ Card Data Acquisition for an ex ternal clock with the desired num ber of sam ples
Step 5 : Send the Start DAQ neoVI Device Virtual Network Com m and
Step 6 : Record network m essages from the neoVI until the DAQ card has acquired the proper num ber of sam ples
Step 7 : After the DAQ Card com pletes its scan, assem ble the DAQ card data and neoVI m essage buffer in to one buffer using the start tim estam p. Analyze, display or store your results.
Step 8 : Send the Stop DAQ neoVI Device Virtual Network Com m and
neoVI Virtual Network Command Byte 1 Setting
neoVI Documentation - (C) Copyright 2000-2019 Intrepid Control Systems, Inc.
Last Update: Thursday, July 09, 2009
MISC2 pin that can be used to correlate data collected with the neoVI device with other data acquisition equipm ent that accepts an ex ternal clock . The clock rate is
in neoVI ex plorer
to start the clock . neoVI will send a neoVI Device Network m essage tim e-stam ped when the DAQ Clock was started.
to stop the DAQ Clock .
Figure 1 - neoVI generates a pulse at a frequency which is time correlated with the neoVI timestamp.
Table 1 - Sampling Frequency for the DA Q Pacer
0
1
2
3
4
5
6
7
8
9
Sample Frequency
2.000 KHz
8.000 KHz
32.000 KHz
40.000 KHz
80.000 KHz
160.000 KHz
400.000 KHz
800.000 KHz
1.600 MHz
4.000 MHz

DAQ Pacer Clock

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