If you touch the pod threshold fields you will see the following
Figure 5-11. Pod Threshold Pop-up Menu
TTL sets the threshold at +1.6 volts, and ECL sets the threshold at −1.3 volts.
The User option lets you set the threshold to a specific voltage between −9.9 V and +9.9 V. If you select this option you will see a numeric entry keypad
Figure 5-12. Numeric Entry Keypad Pop-up Menu
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