How to get the AT1000 in the computer mode
After the above is done, you can enter 300B in the tube test software, and you should be able to switch on and off the heater. You can do this without a tube inserted, but you will see the tester display respond, and the program itself too. If that doesn't work, do not continue below, but fix this first.
Note: When you have an RS232 tester, using an USB to RS232 cable, this cable needs to be installed too, with the install program that belongs to the cable. Try all four COM ports, as some of those cables do not use port COM1 by default, but COM1, COM3 or COM4. If so, you can pre-configure this in the AT1000 ini file, so you don't have to do this every time you start up the tester.
So after you can apparently switch on and off the tube heater, the tester is ready to go, and you can continue with the rest:
Make a directory on your computer, where you will save the settings that we are creating here.
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