Test: If you are using a Logic16, Logic 4, Logic 8, Logic Pro 8, or Logic Pro 16, you will need a voltage source, preferably between 3.3 volts and 5.0 volts.
If you are using the original Logic (8 channels, digital only), you do not need a voltage source.
Set up a capture on all channels (digital and analog) and set the recording time for 15–30 seconds. Make sure to set the analog sample rate to a low setting, preferably 1 kSPS. Any digital sample rate is acceptable.
Start a capture. During the capture, take each input, one at a time, starting with input 0 and going in order to the last input, and short that input to the voltage source (or a ground pin in the case of the original Logic).
You can end the capture early if you finish before the capture completes. If you are unable to finish testing all the channels within the capture time, either repeat the process faster or extend the capture time.
In the capture, verify that each channel is initially low (high in the case of the original Logic.) Verify that only one channel goes high at a time and that the channels go high in order from 0 to the last channel. Make sure that none of the high pulses are out of order, such as channel 2 going high before channel 1. Note that since the original Logic's inputs are pulled up internally and the test is performed with ground, the pulses in question should be low and not high. If the device used has analog channels, make sure the analog channels display the same behavior.