I have a JTD-Pro-4x8 4in 8out HDMI switch from J-Tech Digital. They supposedly gave me the IR Hex codes for the remote but it is only 3 numbers each. Looking at the IR hex editors and other codes there seems to be more to that. Can anyone help explain what I need to enter to create a valid hex file?

They said Button 1 = 00ff40 Button 2 = 00ff07 Button 3= 00ff09 Button 4= 00ff19

Looks like NEC. But they didn't really give you enough info. My best guess is NEC1, device 1. And the last number is the function code in hex. You can use that to generate the pronto hex in IR Scrutinizer and see if it works. Otherwise, you need to ask what the "customer code" is or get their technical document with all the details. "Customer code" would be the actual device number in place of my guess of 1.

Thanks for the reply mdavej . Wondering if you (or someone) can dumb it down just a bit for me. I downloaded IR Scrutinizer and assume I need to use the generate function. Is the input in decimal not hex? The help docs seem to assume I know what I am doing!

J-Tech referred to the code as the User Code if that means anything.

In scrutinizer, For the Device, Sub and Function does that equate to D=0 S=255 F=64 (assuming decimal)? Just not understanding what the 00FF40 represents.

You have the right idea.  NEC specified the device, subdevice, and function numbers are to be sent with the least significant bit of each byte first.  The hexadecimal numbers you've posted probably don't follow that rule, but 00 and FF are the same regardless of bit order. The function number needed for IrScrutinizer is  likely to be 0x02 rather than 0x40.  BTW, you don't need to convert to decimal, IrScrutinizer will accept hex numbers if you enter them with a preceding 0x.

thanks, that is what I needed. Working!