User's Manual

6
How your RF System works
Your RF System allows you to control devices that are behind closed doors.
Remote controls generally use infrared (IR) commands to communicate
with your devices. These IR commands need a direct line of sight between
the remote and the device to work.
Your Harmony 900 also sends radio frequency (RF) signals, like the ones
used for cordless phones, that can go through objects, such as a closed
cabinet door.
Your RF system converts these signals into IR commands that reach the
devices and perform the requested action, such as turning on your TV or
playing your DVD.
Here’s how it works:
You press Watch TV on your Harmony 900 to start watching the news •
The RF signals are sent from your Harmony 900 through your cabinet •
door
The Harmony 900 RF System converts the signals into IR commands•
The IR commands reach your TV and your cable box•
Your TV and cable box turn on•
DVD CD
Cable/Satellite
AV Receiver
Blaster
Picks up RF signals from remote
and converts to IR signals
Remote
Sends RF signals to RF System
Mini Blaster
Relays IR signals
to any device in range
Mini Blaster
RF signals
Communicates through
cabinet doors
My Activies
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