Re: How do I determine the appropriate buffer size to use to generate a particular frequency waveform?
If you are regenerating the same buffer, then you want to make sure the buffer has a whole number of periods. If you have 2.5 periods in your buffer and are regenerating this same buffer, you would get the middle of the third period and then start over at the beginning of your 1st period, giving you a discontinuity. If you are not regenerating the same buffer, then as long as you are picking up where you left off as far as you data goes, you should see the discontinuity. For our previous example, if your next buffer's first point starts at the 2nd half of the 3rd period, you shouldn't see a break in the waveform. Below is a link to a knowledge base that discusses how to calculate the resulting output frequency. I hope this information helps. Respond if this did not answer your question or if you have additional questions. a href=http://digital.ni.com/public.nsf/websearch/AD1739FDEDBE080886256DF9007B929A?OpenDocument;Calculate Frequency/a
Re: Using a PC4350 DAQ and/or a PC-LPM-16/PnP DAQ under Labview 7.1
The PC-LPM-16/PnP is not supported by NI-DAQ 7.0 or higher. In order to use this board, you will have to install NI-DAQ 6.9.3 or older (see Versions link below). This will use the Traditional driver. As you noted this device is not supported by NI-DAQmx. There are numerous examples that ship with LabVIEW that should illustrate how to use this board. As for the PC4350, what version of the driver did you install? a href=http://www.ni.com/support/daq/versions.htm;NI-DAQ Version Reference/a
Re: Initial DAQPad-6020E outputs
By default, the power-up states of the digital lines on E Series devices is a high-impedance input state. Below is a knowledge base that discusses how to pull these lines low initially using some pull down resistors. I hope this helps. a href=http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/b4fed0c879bd155f862569ed00142dc7?OpenDocument;Setting the Default State of Digital Lines on E Series DAQ Boards/a
Re: pc-dio-96
Stu is correct is his explanation of the behavior. However, if the port is configured for output, you want to make sure you don't drive any of those lines with an external device. Otherwise, you can damage the board. It almost sounds like you are wanting to do a digital input operation with a set power up state. If this is the case, you can define what state your board powers up in. Refer to page 3-9 of the PC-DIO-96 user manual linked below. a href=http://www.ni.com/pdf/manuals/320289c.pdf;PC-DIO-96 User Manual/a
Re: Daq Solutions Button Greyed out after reinstall
Hendry, First of all, what is the model of your PCI data acquisition board? Depending upon your board model, you may want to use NI-DAQ 7.0, since that will allow you to automatically install support for LabVIEW 6.i. NI-DAQ 7.2 should work with LabVIEW 6.i, but you may have to manually copy some files to appropriate locations. With your current installation, does your board show up in MAX? If so, can you run any of the data acquisition examples that ship with LabVIEW?
Re: creating two sin signals using function generator.vi example
Nidal, Below is an example that illustrates how to generate different sine waves on two separate analog output channels. a href=http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B123AE0CBC9E111EE034080020E74861p_node=DZ52313p_source=External;Example/a
Re: Why does converting a SGL to SGL get rid of coersion dots?
The algorithm for determining resulting data types gets much more complicated when using uninitialized shift registers. The algorithm used by the binary arithmetic functions is slightly different than the algorithm used by the compound arithmetic function. It was determined that the algorithm used by the compound arithmetic function is more robust than that used by the binary arithmetic functions. Modification to the algorithm used by the binary arithmetic functions is being considered for future versions of LabVIEW.
