wavemaster said:
The 616 IS at the house.
But back to the question, does the 616 "replace" the need for a signal locker being a powered switch?
A powered switch IS a signal locker. On an unpowered switch, like the WB68, the first receiver has to power the switch, including the circuits that send continuous power down the 4 lines to the LNB. Two of the four put out around 19v (one with 22KHz tone), and two put out around 14v (one with 22KHz tone). All that power is drawn from the power supply in the receiver. The switch "locks" the switch inside the LNB to a specific set of transponders by using the combo of voltage and presence/lack of tone.
On a powered switch, or with a signal locker together with an unpowered switch, the switch/locker uses its own power supply to send the power to the 4 lines going to the dish. This takes the load off the receivers, and eliminates the voltage drop from the cable runs from the receivers to the switch.
A signal locker is just a powered switch without the switch. To use both together would be needlessly redundant.