When you provide vector values for one or more parameters of the Pulse Generator, the output is a vector signal with parallel pulse trains. If you directly connect this to the gate input of a switch component, the switch will also be vectorized, so you'll end up with parallel instances of switches that are each controlled by one of the pulse trains.
But you want to control a single switch with an OR-combination of the pulse trains. To achieve this, you need to use a Logical Operator with the Operator set to "OR" and Number of inputs set to "1". Feed the vector output of the Pulse Generator into the Logical Operator and the output of the Logical Operator into the gate input of the switch.