Button operation

I am writing a driver to control my generator of signals 8642 HP and I'm getting a funky behavior.

As stated, I got a deal structure, with a value button "change when you press on," which aims to turn the RF output on my signal generator.

When touched, it sends the code RF ON "R1" on the device and turns on the output.  This function works well.

When the button is pressed off, it sends the code RF OFF 'RO' to the machine and then disables the output, but there is a problem.  About 3 - 4 times per second (I guess that all the necessary time to work around once all loop) it seems to restore, put on for a second fraction (long enough to reach half of its fixed amplitude) and then back OFF.  It's almost as if there is a preset by default for the condition ON RF, and it goes around the loop it automatically to every time turn on the RF for a split second and then turns back off.

Might be your signal generator.  I have a few who turn out momentarily whenever a setting is changed, as if the changes can only be combined with a failure of the State.  It doesn't matter if the edits are done remotely or via the front panel.

VISA/Gbspecifications FOR, you have only to send a command during a change of State.  The joint used feedback down to compare the current and previous switch state.  The comparison does not match? set to TRUE when the state changes.  Vi add True/False selects the appropriate command based on the current state of the switch.  The case of FAKE (State selector switch is unchanged) simply passes the wire error, i.e. nothing is written to the GPIB.

Tags: NI Software

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