FRA GPIB data loss

[gireesh]

hello dennis

byte count is important because however byte is to be out that only we can read otherwise it will show error of timed out.

 this one i can tell u because i tried. that is when i entered 39 byte count it shows OK with some code number that is enough for me. if u have an instrument you can try. i am not challenging you!! i had seen the difference.

the code it is shown, that only I should know? ok i will search in help

termination character is comma only. the FRA had not any EOI that i know. without this EOI, if we know the byte count we can eliminate the error

i don't know about the IEEE-488.2 having any complaint. if it is there it is affecting in the data showing means scan from the string. it shows zero values in between the actual output as earlier i told you.

 there is no instrument like 1250 with modulation with cost effective. i know  you are having modulation kit, with this modulation kit, i can make FRA( using function generator and counter)but i have limitations because i am not an engineer.

[Dennis_Knutson]

You clearly did not understand my comments and you clearly do not understand the GPIB protocol. The only reason that specifying 39 bytes works is because the instrument does not terminate it's messages correctly with EOI (this is a GPIB control line) and since it does not, you have not correctly configured the GPIB interface for whatever termination scheme the instrument does use. A terminator may be a CR, LF, or both and a comma is a separator - not a terminator. As long as the instrument returns exactly 39 bytes, you will be okay but for a command that returns more or less, you will have problems. You should prevent future problems by determining what termination scheme the instrument actually uses and configure the interface correctly.

"i don't know about the IEEE-488.2 having any complaint" IEEE.488.2 is a standard and it is that standard that states an instrument must use the EOI line. Your instrument is either older than the current standard or the vendor did not care about it. In either case, I don't see how my earlier post would imply that the standard would complain.

[gireesh]

hello all of you,

OK I agree with you, because I studied LabView in my view only. I did not attend any classes or seminars. whatever palette is used for means the the use of palettes that only I know again means how m problems will be solved by your palette, that only i need. i am saying that because i made something whichever is correct or not, i don't know about that whatever it is working. the FRA is an old instrument and they are not responsible the instrument. but we need that insrument due to less cost effective.later i will attach my project about the FRA and look at thet whatevet errors are there or whatever laws are not applied. after all it is working. after the successful launch of FRA, our users are thinking about how to modify the  program for their own useage.

i am very thankful to you and all for all help.

Again i am expecting the help from u

thank you