[PvK]

It can be done. If you don't have a typo with "Sector - Sensor Interference" (Talisman), then it is probably just that your design doesn't have room by the time the AI gets to that Misc ability. Here, though, is an example of a ship that does use a Talisman:

Name := Attack Light Cruiser
Design Type := Attack Ship
Vehicle Type := Ship
Default Strategy := Maximum Weapons Range
Size Minimum Tonnage := 425
Size Maximum Tonnage := 475
Num Must Have At Least 1 Ability := 1
Must Have Ability 1 := Weapon
Minimum Speed := 6
Desired Speed := 500
Majority Weapon Family Pick 1 := 1
Majority Weapon Family Pick 2 := 3
Majority Weapon Family Pick 3 := 2
Majority Weapon Family Pick 4 := 25
Majority Weapon Family Pick 5 := 0
Secondary Weapon Family Pick 1 := 12
Secondary Weapon Family Pick 2 := 11
Secondary Weapon Family Pick 3 := 22
Secondary Weapon Family Pick 4 := 0
Secondary Weapon Family Pick 5 := 0
Shields Spaces Per One := 450
Armor Spaces Per One := 0
Majority Comp Spaces Per One := 1200
Majority Comp Ability := Weapon
Secondary Comp Spaces Per One := 0
Secondary Comp Ability :=
Num Misc Abilities := 10
Misc Ability 1 Name := Point-Defense
Misc Ability 1 Spaces Per One := 200
Misc Ability 2 Name := Planet - Shield Generation
Misc Ability 2 Spaces Per One := 10000
Misc Ability 3 Name := Combat To Hit Defense Plus
Misc Ability 3 Spaces Per One := 10000
Misc Ability 4 Name := Combat To Hit Offense Plus
Misc Ability 4 Spaces Per One := 10000
Misc Ability 5 Name := Sector - Sensor Interference
Misc Ability 5 Spaces Per One := 10000
Misc Ability 6 Name := Supply Storage
Misc Ability 6 Spaces Per One := 200
Misc Ability 7 Name := Shield Regeneration
Misc Ability 7 Spaces Per One := 800
Misc Ability 8 Name := Planet - Shield Generation
Misc Ability 8 Spaces Per One := 90
Misc Ability 9 Name := Planet - Shield Generation
Misc Ability 9 Spaces Per One := 10000
Misc Ability 10 Name := Scanner Jammer
Misc Ability 10 Spaces Per One := 10000