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Old 02-15-2007, 10:41 AM   #1
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Default SIRIUS WIreless Repeater SIRWRS1

I started this thread since the discussion of the new Wireless Repeater is broken up in some other sections. Current ETA is in the beginning of March. As we know ETAs are VERY subject to change.

Here is the product description. Retail price approx $99.


"Wireless Repeater System
SIR-WRS1

Create your own Wireless SIRIUS Network and enjoy SIRIUS Satellite Radio throughout your home or office, from up to 75 feet away! The SIR-WRS1 Kit includes one Transceiver one Receiver and an AC Adapter.

Simply place the compact transceiver where it can be connected to your SIRIUS indoor or outdoor antenna or signal routing system, and hook up power via the included AC power adapter. The Transceiver converts the SIRIUS satellite radio signal to 900mHz and transmits it wirelessly to any wireless receiver in range of the transceiver.

The Wireless Receiver connects to any SIRIUS home dock, boom box or docking system with no external power connection - it's powered directly from an antenna port! You can add additional receivers (p/n SIRWRR1 - SRP $49) as needed, if you have more than one SIRIUS radio to connect the the wireless network.

The SIR-WRS1 provides easy signal distribution from one antenna to one or more SIRIUS radios. Enjoy your own Wireless SIRIUS Network with the SIR-WRS1!

In fine print.
Range approximately 75 feet. Based on line of sight, unobstructed testing in ideal conditions. Actual range will vary due to local conditions including but not limited to environment, physical obstructions, transmitter and receiver location and orientation, interference and other possible impediments."
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Old 02-15-2007, 01:01 PM   #2
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Very very interesting....

I'm trying to weigh the pros and cons of waiting for this vs. getting a Ccrane FM transmitter.

900MHz... This unit sounds like it's basically a home cordless phone system that transmits the sirius signal. I wonder what would have a higher sound quality FM vs. 900Mhz..

The only other thing that scares me is the 75 foot rating WITHOUT OBSTRUCTIONS. So add some walls and stuff, what is the realistic transmit distance?

I'm looking forward to some reviews on here when they become available.
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Old 02-15-2007, 01:14 PM   #3
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I'm willing to look into this. We have two radios here, the outdoor antenna splitter kit isn't cutting it and we have two, maybe three soon enough, radios here and really need a repeater.

Like ClubSteeler said, the 75ft without obstructions thing does worry me some.

Also, if you buy a battery pack for a radio, what's the reality of a very, very true portable ordinary radio? If the receiver doesn't require power, and you have a battery pack and headphones... think about it
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Old 02-15-2007, 02:20 PM   #4
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Quote:
Originally Posted by ClubSteeler View Post
900MHz... This unit sounds like it's basically a home cordless phone system that transmits the sirius signal. I wonder what would have a higher sound quality FM vs. 900Mhz..
Really, that's technically what it is.. It's a cordless antenna.

Instead of stringing 50 feet of coax, you have a 900mhz link between the antenna and a special receiver that attaches to the Sirius receiver. You can use the device with more than one Sirius receiver, but each Sirius receiver will need its own special receiver to pick up the 900 mhz signal..

The sound quality doesn't come into play because the signal is still fully digital when it is converted from 2300 mhz to 900 mhz then back to 2300 mhz again..... As far as the Sirius receiver is concerned, it's hearing the normal Sirius signal.
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Old 02-15-2007, 02:55 PM   #5
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Originally Posted by jwt873 View Post
Really, that's technically what it is.. It's a cordless antenna.

Instead of stringing 50 feet of coax, you have a 900mhz link between the antenna and a special receiver that attaches to the Sirius receiver. You can use the device with more than one Sirius receiver, but each Sirius receiver will need its own special receiver to pick up the 900 mhz signal..

The sound quality doesn't come into play because the signal is still fully digital when it is converted from 2300 mhz to 900 mhz then back to 2300 mhz again..... As far as the Sirius receiver is concerned, it's hearing the normal Sirius signal.
I've long forgotten my DSP and antenna theory.. but in reality, the waveform is a wave, and really is analog....

What likely happens is the 2.3GHz signal goes to an A/D for a resulting digital signal, downconverted to 900MHz, back through a D/A and transmitted out at 900MHz, which is probably chosen for it's ability to pass through walls and what not at low power. The 900MHz is once again sent through a A/D at the receiver, maybe even upconverted back to 2.3Ghz, and sent to your radio where it is demodulated and channelized.

I doubt this can be done truly lossless, and would expect there to be some sort oif sound quality loss, possibly not really perceptable, but maybe it is.

I also wonder that since Sirius seems to be maxed out in their bandwidth, can they really downcovert to a lower frequency and not lose data?

Someone who really understands all of this signal processing might want to chime in here.
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Old 02-15-2007, 04:27 PM   #6
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I'll be the first SIRIUS Backstage tester of this.

Unless DAB beats me to it.
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Old 02-15-2007, 04:53 PM   #7
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Quote:
Originally Posted by ClubSteeler View Post
I've long forgotten my DSP and antenna theory.. but in reality, the waveform is a wave, and really is analog....

What likely happens is the 2.3GHz signal goes to an A/D for a resulting digital signal, downconverted to 900MHz, back through a D/A and transmitted out at 900MHz, which is probably chosen for it's ability to pass through walls and what not at low power. The 900MHz is once again sent through a A/D at the receiver, maybe even upconverted back to 2.3Ghz, and sent to your radio where it is demodulated and channelized.

I doubt this can be done truly lossless, and would expect there to be some sort oif sound quality loss, possibly not really perceptable, but maybe it is.

I also wonder that since Sirius seems to be maxed out in their bandwidth, can they really downcovert to a lower frequency and not lose data?

Someone who really understands all of this signal processing might want to chime in here.
* The signal is demodulated into 1s and 0s by the WRS1.
* Then it's modulated at the 900MHz frequency.
* The receiver demodulates it back into 1s and 0s (this is lossless, otherwise there's absolutely no way it would ever work... if nothing else, the "checksums" of sorts are going to indicate a lot of bit errors and all you'll see on the receiver is "Acquiring Signal").
* The receiver remodulates at 2300 MHz, making it transparent.
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Old 02-15-2007, 05:24 PM   #8
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Quote:
Originally Posted by ClubSteeler View Post
I've long forgotten my DSP and antenna theory.. but in reality, the waveform is a wave, and really is analog....
Quote:
Originally Posted by leviramsey View Post
* The signal is demodulated into 1s and 0s by the WRS1.
JWT has it right. The 'Wireless Repeater' is basically a downconvert mixer combined with a power amp. The receiver simply upconverts back to the original CF. It sounds very similar to XM's (Delphi's) version.

Club, your way is too complex and your assertion about loss is simply wrong, or at least not applicable.

levi, demodulating each channel, then remodulating them would take a very large device. Put solar panels on it and a power source and you could put it in orbit and sell the service.

PaintedAntenna, are you taking pre-orders? Please PM me when you get them in, if you don't. Thx.
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Old 02-15-2007, 05:58 PM   #9
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levi, demodulating each channel, then remodulating them would take a very large device. Put solar panels on it and a power source and you could put it in orbit and sell the service.
I'm not talking about a decode to digital audio data. Just doing the same thing any other receiver does, which is demodulate QPSK into 1s and 0s (the receiver then feeds those into the various decoders... a repeater wouldn't do this). This is done without any use of channels (a bitstream is a bitstream is a bitstream).
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Old 02-16-2007, 10:30 AM   #10
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Is there any news that this repeater repeats a terrestrial signal?
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Old 02-16-2007, 11:29 AM   #11
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Anyone think Best Buy or CC will stock this in a few weeks? I know there are some BB employees on this forum who can check their BB computer system for a release date. I need this unit, BAD.
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Old 02-16-2007, 11:48 AM   #12
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75 feet is a pretty short range.
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Old 02-16-2007, 12:46 PM   #13
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Quote:
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75 feet is a pretty short range.
It should be fine in an average size home.
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Old 02-16-2007, 12:56 PM   #14
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It should be fine in an average size home.
If it works as good as the XM Delphi repeater, you will be very pleased.

Here is the review I gave on XM411 (Dec. 2005).

" My wife gave me the Delphi Repeater as an early Christmas gift last night. (Is she awesome or what?! )

The REPEATER works great! I highly recommend this for anyone with some area room signal issues. I have the unit in our south facing upstairs bedroom facing the window. I can walk in our north side bedroom with no problem with a signal. I went downstairs to the main level north facing living room with no issue (I could hardly ever get a signal here before the repeater). I then went to the downstairs basement with no problem. I then went outside to our DETACHED metal pole barn garage. This is on the south side of the house. The MyFi plays great! The repeater is somewhat pricey, but DARN WELL WORTH IT! Remember, you have to get this adaptor for your MyFi if you want to carry it around with the REPEATER antenna to different places:

http://www.myradiostore.us/antennas-...a-adapter.html

Also, I have a wireless enternet router and a cordless phone with no signal issues with the DELPHI REPEATER.

I can't wait for the upcoming baseball season to be able to listen anywhere around the house.

Having XM for almost a year without the repeater really makes me appreciate what it does!"
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Old 02-16-2007, 01:55 PM   #15
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Quote:
Originally Posted by goreds2 View Post
If it works as good as the XM Delphi repeater, you will be very pleased.

The MyFi plays great! The repeater is somewhat pricey, but DARN WELL WORTH IT! Remember, you have to get this adaptor for your MyFi if you want to carry it around with the REPEATER antenna to different places:

Having XM for almost a year without the repeater really makes me appreciate what it does!"
Sounds awesome, but I heard we wont be able to walk around our house with a stilleto expecting to pick up satellite signals, unlike your MyFi.
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