Just to add a bit more..... The Sirius 'repeater' is essentially a cordless antenna system. It consists of two parts. There is a box (Box A) that you plug the antenna into, and another box (Box B) that you plug your receiver into.
Box 'A' takes the 2300 Megahertz Sirius signal from the antenna wire and converts it into a 900 Megahertz radio signal. Box 'A' then transmits this 900 Megahertz radio signal over the air to box B. Box 'B' receives the 900 Megahertz signal and coverts it back to the 2300 Megahertz antenna signal. This signal is sent over a wire to the receiver.
Note that you must buy a separate receiver (Box B) for every radio you have. A Sirius radio by itself cannot pick up the repeater. (Box B is called the Echo Antenna SIR-WRR1)
Hopefully, the diagram below explains it a little better.
The main advantages of having a cordless antenna are:
- You don't have to route wires over floors or through walls and ceilings.
- There is better range than with a 50 foot antenna extension cable.
Some disadvantages are:
- Cordless phones and other home electronic products operating at 900 Mhz can cause interference.
- The Echo transmitter requires a 12v power cube. You need power at the place you install the transmitter. (The echo antenna is powered by your Sirius tuner
Below is a comparison showing the difference
between using a Sirius 'repeater' and a 50 foot extension cable.
Finally.. Here is the entire PDF owner's manual for the Sirius Echo Repeater System SIR-WRR1