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about Labview VISA write

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I'm trying to design a driver for an integrable tunable laser assembly (ITLA). The command summary given in the datasheet is like:

 

register name (command) 

channel(0×30)

pwr(0×31)

........

 

Q1. if I want to select channel 1, what should I write to the VISA write buffer?  these commands look like Arduino, I don't know how to use them in Labview. 

 

Q2. the laser has a customer software tool called Sunshell. the Sunshell commonly used commands have the format like: it.channel(1). it.connect(1,9600).........I tried to type this format in the string, and send to the VISA write buffer, but it didn't work.

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