Setting HP53131 resolution in Labview

[Sam@Lotek]

I am trying to use my HP53131A couter to read a 400Mhz signal with a precision of 1/10th of a Hz. the couter is capable of this but with Labview the precision seems to be set a 4 digits and I cannot reset this. I need 10 digits of resolution.

I am using the Drivers from the NI website to control the counter though GPIB.

[johnsold]

I do not have an Agilent counter. Does the counter itself get set to 4 digits or the displayed value on the LV screen?

Many of the drivers do not implement every possible function of the instrument. You may have to modify the drivers to get what you want. For example the HP5313xA Read a measurement.vi converts the string received from the counter to a double and then displays it on an Extended indicator with 6 digits of precision???

Study the programming manual for the instrument. When you find the commands to set the resolution, send those to the instrument via simple VISA Write and Read functions and look at the returned strings. If the resolution you want is there, then you can look into modifying the existing drivers or writing your own.

Lynn

[Sam@Lotek]

I actualy Figured this out on my own. the setting is in the Arm freq,period,ratio VI. it wasn't a problem with precision as much as it was a problem with the triggering

[metrisys]

I'm having the same problem.

Sam, can you describe how you fix this.