Why is there no way to make the time capsule go to sleep or turn off at night?

Why is there no way to make the time capsule go to sleep or turn off at night? I put a bed into my office for guests to sleep on, but I tested, and found the levels of emission are not acceptable. So I can't use this bed! Also, I have kept the Time Capsule near my computer, and after testing, I found out why I get so tired after working on this machine. The emission levels are too high. I need to move it to a place where nobody can be near it.