yaba

The case is the 2 instruments are connected in parallel through my computer. As I said I want to measure Amplittude and the angle of an antenna. the turn table is taking the angle measurement while the Spectrum analyser is reading the Amplitude. Therefore the 2 programs must run at the same time and stop at this same time. If u have some examples to post to me that will help me. (example of 2 synchronizing device or program using GPIB). Unfortunitly I don't have LV.8 . My version is LV7.1 . Once again thanks for your reply.

Thanks u for your time spend on my problem. But may be there some misunderstanding about what I try to explain. I have got the 2 programs: 1is used to read the spectrum analyser and the 2e is to turn the turntable. Both are use GPIB. Now if I put them in the while loop. How am I got to link the stop function so both can stop at the same time? I hope my explaination will help u solve my problem. Thanks in advance.

I am very sorry I fogot to mention that I am taking the amplitude reading from my spectrum analyser that means that when I am reading the angle value from my first program (turntable implementation) the spectrum analyser implementation also read the amplitude value. And there is one more I would like to ask, if anyone can give me an example how the 2 programs can be run in synchronizing.( means they run a this period of time and stop a this same period of time because I realise that my two program are not synchronized when I stop one the other is still runnig. I will be very happy if I have got a reply for my post because I am stacked on this particular and this is used for my final year project and also Iam running of time. Thanks u in advance for all your helps. Thanks.

Hi I am struggling on the last part of my project, which, consist to run two programs together (see attachment). The first program is implement to run a turntable (antenna receiver) to read the angle. The second program is used to read the max amplitude of that particular angle. NB: The transmitter is facing the turntable at 180degree. So we taking an antenna reading (angle and amplitude) according to transmitter For example I want to take a reading from 110 to 170degree. Because the receiver is facing the transmitter at 180 therefore 180degree on my representation is 0degree (180-180=0) where the first amplitude reading will be taken and the max value 0f 180 (0) will be save for a little while so that I can take the second amplitude reading at the starting point (110) which is = 110-180 =-70degree on my representation. From this point I can take a reading at each 1000ms and also save their max value while saving also their angle (let say a 0degree=? dB, (110-180) degree= -70degree=? (120-180) = -60=? And so on). The max amplitude value of 0 (180) will be subtracted from these amplitude values obtained so the result will be used to plotted against angle in XY graph where X=angle and Y = amplitude. (Where the high point will be 0(180) degree= 0dB on the graph and so on. Download File:post-4215-1143587433.vi Download File:post-4215-1143587545.doc

Hi I am struggling on the last part of my project, which, consist to run two programs together (see attachment). The first program is implement to run a turntable (antenna receiver) to read the angle. The second program is used to read the max amplitude of that particular angle. NB: The transmitter is facing the turntable at 180degree. So we taking an antenna reading (angle and amplitude) according to transmitter For example I want to take a reading from 110 to 170degree. Because the receiver is facing the transmitter at 180 therefore 180degree on my representation is 0degree (180-180=0) where the first amplitude reading will be taken and the max value 0f 180 (0) will be save for a little while so that I can take the second amplitude reading at the starting point (110) which is = 110-180 =-70degree on my representation. From this point I can take a reading at each 1000ms and also save their max value while saving also their angle (let say a 0degree=? dB, (110-180) degree= -70degree=? (120-180) = -60=? And so on). The max amplitude value of 0 (180) will be subtracted from these amplitude values obtained so the result will be used to plotted against angle in XY graph where X=angle and Y = amplitude. (Where the high point will be 0(180) degree= 0dB on the graph and so on. Download File:post-4215-1143242425.vi Download File:post-4215-1143242513.doc

Now I want to use the measurement data to plot into the xy gaph ( if possible wave form graph) where x is the angle obtained ( let say the starting point is 90 and finishing p. is 270 ) from my receiver and y is the amplitude measurement obtained from spectrum analyser . Both instrument are connected in parallel through the S.Analyser. I want to obtain the graph in this way: 180deg(on the graph) =0dB I am having problem writing it This is my starting point Thanks Download File:post-4215-1143073026.vi

Hi van18 The program is working with the for loop u sent. thanks

I am reading the higher value now after stopping the application. Now I want to keep this higher value in the table for while and take others readings (these reading must also display their max values in the same table where is the first higher value) without changing the setting and now find the max values of these higher values. next step is to change the setting (RF input, stop and start freq ) and do the same things let say take readings. At the end of work I will get different freq and their max amplitude in the table so I can print them. thanks

hi sir When I run the program it gives me PROGRAM ERROR (LABVIEW.exe has generated error and will be closed by windows. You will need to restart the program. An error log is being created>and the window log off.

I will be at uni next week, I will test it and let u know. thanks for your helps so far

I am reading an instruemnt and I am getting a value that I want, but I would like to read the instrument again with the same setting and get another value so that I can compare the two values and find the higher value because the value is always changing a little. Is it possible to save the first value for a little while so that I can get another value and compare them and the higher value will be sent automaticly in the table to be print. I used the array to do that but I am not sure if it right. I did not test it because I am away from uni for a week and I do not have the equipments to do it. NB: the subVI's did not not included because these are spectrum analyser drivers downloader from ni.com. I do not know how to sent them to u. I enclose the modify program with the array for u to see. so I can get help thanks Download File:post-4215-1142013732.zip Download File:post-4215-1142013843.doc

The manufacture and model number of the spectrum is ROHDE&SCHWARZ FSP R&S 9kHZ~40GHz. As I explained above the program is working I can read the max amplitude or max freq value but what I want, is to put the read max value so I can it in spreadsheet and print them (see above the first post for more explaination) see also the figure Download File:post-4215-1141817466.zip

hi all I made a program that can read RF amplitude and freq from the spectrum analyser. Now I want take several amplitude mesurements with the same freq value and put the high value in the table so I can print it later. NB: I have to set different freq value and take their max amplitude values and put these value in the table as spreadsheet so I can print them later. These max value must be display on the front panel. let say for freq=4GHz, 1e mesurement = -22dB, 2e = -34dB, 3e = -12dB this mesurement must be put in array so it can sent the max value (-12dB) in the spreadsheet. Set another freq value take amp value and put the max value in the same table. At the end I can print all these max value. I need help to build these array because I am new in labview and this for my project. Thanhs

I am still having the problem doing my project if anyone is able to help me with the problem mention above. I will attach the spectrum analyser driver so you can use for the program. Thanks