LabView

taking fft of a 500 Hz sine wave signal
Hi, I put together a VI to calculate the FFT of a sine wave signal and graph the result in the frequency domain. In theory, if we take the Fourier Series of a 500Hz sine wave signal, we should see a spike at 500 Hz in the frequency domain. However, the result I got is very noisy and there are spikes everywhere. Co... 27 Jan 2006 23:54

Brooks SmartDDE communication problem
I'm using SmartDDE software to control 8 digital MFC (Brooks 5850s) by using two 0154 Brooks control unit through RS232. I'm able to open both Com Port and all eight channels with following Tag name: CHANNEL1...CHANNEL8. The first four channels function properly while the last four channels doesn't function prop... 1 Feb 2006 09:49

labview talk vs pic microcontroller
Hi I am currently on LV6.i, trying to program a PIC chip through rs232 com port but really do not know how to start it since i only have a knowledge of GPIB programming. OK, here is what I plan to do: My test board had 4-5 analog signal, I try to use a micro chip to pickup these signal and converted into ... 23 Jan 2006 16:52

tektronix TLA5202 reading data
Hi,   I am starting to get familiariser with remote control to the Tektronix TLA5202.  The current SW version is as following: - LabView 8.0 - Tektronix instrument driver library : Tektronix TLA series (Plug and Play project used with Labview 8.0)   I was able to: - load pre-se... 31 Jan 2006 15:00

RS485 communication with 9 databits
Hi,   I want to use LabVIEW to communicate with a uC'er via an USB/RS485 device. The communication protocol is set up to 9 databits (9'th data bit specify address/command). How can this be solved in LabVIEW ?? VISA serial port configuration only accept 5-8 databits. Is it possible to 'build' the RS485 command... 23 Jan 2006 05:47

xy graph multi plots
Hello,   I have a need to plot a curve on an X-Y graph which is Voltage (Vsd) vs Current (Isd). After the first plot, I need to set another voltage (Vg) to a new level and repeat the plot. I would like to do this without erasing the original plot so I can generate a family of curves. Currently, I ... 20 Jan 2006 15:01

graph
Hello, I would like to display a multiplot graph in eg 4 values of voltage vs temperature, any idea? I have attached an simple example I have done but Iam stacked when try to connect my values to an XY graph.   Regards, multiplot graph.jpg: http://forums.ni.com/attachments/ni/170/162414/1/multiplot graph... 20 Jan 2006 13:58

graph question
I have two data graphs.  On my bottom graph the values for the X-axis start to the left of the Y-axis. How can I fix it so they start on the right side of the Y-Axis like the top graph? (see picture) Thanks,  graph question.JPG: http://forums.ni.com/attachments/ni/170/162209/1/graph question.JPG ... 19 Jan 2006 16:35

sr 400 photon counter (stanford research system)
hi, i need help regarding sr400 two channel gated photon counter(SRS) my problem is: i open getting start wizard ,it shows. hardware presence verified software  "        ''          ' ' interface sequential verified upto here it... 20 Jan 2006 10:50

multiple measurement types, help!
I am trying to write a multi-purpose vi for students to use for acquiring and recording strain, thermocouple, LVDT, and DC voltage signals as needed by their experiments.  We have a setup on wheels with a PCI-6052E card cabled to an SCXI 1001 chassis with the following modules installed: four 8-channel strain... 19 Jan 2006 22:18