Thursday, August 10, 2006

Ki Ryung Received Four New Certifications

Ki Ryung received 4 new certifications dated yesterday for four Sirius satellite radios. The four radios are identified by the FCC IDs as:

P3HSP3 New Sportster 3
P3HNSPHR2 Sportster Replay re-certification
P3HXTRH3G3S Visor re-certification
P3HNSVH1 Sirius One re-certification

A quick look look at the Sportster Replay circuit board indicates that no changes were made to the circuit board itself, so it was just a component change. Most likely, it was a power set resistor for the BH1415F FM modulator chip. All the satellite radios that have FM modulators, both for XM and Sirius, seem to use this chip. It is also evident in the photo above that the the Sportster Replay still uses the internal FM loop antenna. The test procedure for this is well defined. My guess it was a simply matter of changing an inexpensive resistor. The most recent XM radios and the new StarMate radios, as mentioned before, use a different technique that requires a different test procedure. Waiting for the FCC to define the procedure is the likely delay for XM receiving re-certification again for their radios in question.

Here' s a look at the new Sportster 3:

It continues to use the internal FM loop antenna. The performance of the FM modulator is likely to be similar to that of the Sportster 4--terrible. A quick search of the manual indicates that it does not have a Replay feature. Sounds like a stripped down Sportster 4, as it was rumored to be.

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ariel said...

So how does this resistor change effect anything? Is this just a change in power output, thus making the modulator effectively useless?


Mars Gradivus said...

It just regulates the power down to the required level. I think that in the case of the Ki Ryung radios, it will make the FM modulators all but useless. This could be the death of Ki Ryung in the satellite radio business.

As I mentioned, the recent XM radios and the new StarMate radios use a different technique. I'm guessing that this method works better. Why would Wistron Neweb change their technnique if the prior method weren't inferior?