How do they do it ?

[OGC]

<p><font face="comic sans ms,sand" size="2">All this talk about Daylight Saving Time and the problem that XM is having changing the clocks on their receivers got me to thinking.</font></p><p><font face="comic sans ms,sand" size="2">How does my MyFi know what time it is ? I never set it. In fact there is no way to set it. Obviously the MyFi receives a signal from XM telling it what the time should be, but how does it know where in the country I am ? Do they use&nbsp;my zip code ? If so, what happens if I travel across country, does the time change on my MyFi ? If so, how does it know ?</font></p>

[ChimneyFish]

<strong><em><font face="georgia,palatino" size="2">Magick.</font></em></strong>

[oh_kee_pa]

someone figured out the technology to beam a sounds signal to a sattelite, then beam it back down to an antenna the size of a quarter no matter where you are in the country and your concern is the time.... good question, considering my inno time is wrong still

[BoondockSaint]

On the Myfi you can set the time zone in the if you go to set time and then set clock.&nbsp; But I think it automatically changed when I went to Vegas last tyear.&nbsp; Maybe it has diffrent beams for different areas.

[OGC]

<strong>BoondockSaint</strong> wrote:<br />On the Myfi you can set the time zone in the if you go to set time and then set clock.&nbsp; But I think it automatically changed when I went to Vegas last tyear.&nbsp; Maybe it has diffrent beams for different areas. <p><font face="comic sans ms,sand" size="2">At first I thought that too, but that would mean that there would be one satellite per time zone wouldn't it ? And anyone living near the time zone dividing line might get overlapping signals.</font></p>

[oh_kee_pa]

<strong>richg0404</strong> wrote:<br /><strong>BoondockSaint</strong> wrote:<br />On the Myfi you can set the time zone in the if you go to set time and then set clock.ÿ But I think it automatically changed when I went to Vegas last tyear.ÿ Maybe it has diffrent beams for different areas. <p><font face="comic sans ms,sand" size="2">At first I thought that too, but that would mean that there would be one satellite per time zone wouldn't it ? And anyone living near the time zone dividing line might get overlapping signals.</font></p><p>&nbsp;its probably a similar, if not the same technology as cell phones... they are able to change times no problem</p>

[OGC]

<strong>oh_kee_pa</strong> wrote:<br /><p>&nbsp;its probably a similar, if not the same technology as cell phones... they are able to change times no problem</p><p><font face="comic sans ms,sand" size="2">The difference is that cellphones receive and transmit signals so that they can be used as GPS devices. That makes it very easy to figure out which time zone you are in. </font></p><p><font face="comic sans ms,sand" size="2">I'd be VERY suprised if XM receivers sent signals back to the satellites.</font></p>

[PapaBear]

Wait... problems updating the time? I haven't checked my myfi today. Does this mean I missed an hour of today's show?

[Brad_Rush]

<strong>PapaBear</strong> wrote:<br />Wait... problems updating the time? I haven't checked my myfi today. Does this mean I missed an hour of today's show? <p>Probably.&nbsp; I did.</p>

[PapaBear]

Crap. I did. I'm confused. Should I try to get the first hour 3 minutes from now, or at 1am?

[PapaBear]

Ok, wait. I didn't mean 11pm. I think it recorded the last two hours of today's show. Does that mean the first hour will replay at midnigh, or at 1 am?

[weekapaugjz]

<strong>PapaBear</strong> wrote:<br />Ok, wait. I didn't mean 11pm. I think it recorded the last two hours of today's show. Does that mean the first hour will replay at midnigh, or at 1 am?<p>&nbsp;it will be on at 12 but your myfi will read its 11, so set it to record from 11-2 </p>

[oh_kee_pa]

<strong>richg0404</strong> wrote:<br /><strong>oh_kee_pa</strong> wrote:<br /><p>&nbsp;its probably a similar, if not the same technology as cell phones... they are able to change times no problem</p><p><font face="comic sans ms,sand" size="2">The difference is that cellphones receive and transmit signals so that they can be used as GPS devices. That makes it very easy to figure out which time zone you are in. </font></p><p><font face="comic sans ms,sand" size="2">I'd be VERY suprised if XM receivers sent signals back to the satellites.</font></p><p>&nbsp;its got to send a signal for hte radio id... i would imagine anyway.... i dont know, id like to get an answer on this.... nice Karl pick btw</p>

[PapaBear]

<strong>weekapaugjz</strong> wrote:<br /><strong>PapaBear</strong> wrote:<br />Ok, wait. I didn't mean 11pm. I think it recorded the last two hours of today's show. Does that mean the first hour will replay at midnigh, or at 1 am? <p>&nbsp;it will be on at 12 but your myfi will read its 11, so set it to record from 11-2 </p><p>Thanks man. I decided to listen to the first hour online, then to be safe, I set tomorrow afternoon's recording to go from 11am to 3pm.</p>

[zentraed]

<strong>oh_kee_pa</strong> wrote:<br /><strong>richg0404</strong> wrote:<br /><strong>oh_kee_pa</strong> wrote:<br /><p> its probably a similar, if not the same technology as cell phones... they are able to change times no problem</p><p><font face="comic sans ms,sand" size="2">The difference is that cellphones receive and transmit signals so that they can be used as GPS devices. That makes it very easy to figure out which time zone you are in. </font></p><p><font face="comic sans ms,sand" size="2">I'd be VERY suprised if XM receivers sent signals back to the satellites.</font></p><p> its got to send a signal for hte radio id... i would imagine anyway.... i dont know, id like to get an answer on this.... nice Karl pick btw</p><p>if it changed the timezone for you, it could be getting it from terrestial repeaters. or if it's really savvy, interpolating it's position based on the relative satellite strength of the two xm satellites.</p><p>&nbsp;regarding the radio id, the satellite signal will carry the radio ids of all subscribers and if a radio unit doesn't see it's own radio id in the datastream, it will disable itself </p>

[Midkiff]

<font size="3">They're watching you, Enemy of the State style!</font>

[OGC]

<p><font face="comic sans ms,sand" size="2">I thought about it some more over night and it seems like it isn't as involved as I originally thought. XM must be sending out ta signal telling all of the receivers the same time no matter where in the country they are. Then it is up to&nbsp;each individual listener to choose which time zone they are in, since that is about the only adjustment that we can make.</font></p><p><font face="comic sans ms,sand" size="2">I guess if&nbsp;you are&nbsp;crossing time zone boundaries, it is up to you to make the change manually, just like you would&nbsp;adjust your&nbsp;watch when you travel.</font></p><p>&nbsp;</p>

[Sheeplovr]

<strong>richg0404</strong> wrote:<br /> <p><font face="comic sans ms,sand" size="2">I guess if you are crossing time zone boundaries, it is up to you to make the change manually, just like you would adjust your watch when you travel.</font></p><p>&nbsp;</p><p>&nbsp;i cant figurd out the manual time change in my air wave</p><p>what the what what</p><p>id think id be like a cell phone and where ever you go it changed time magicly&nbsp;</p>

[Mike Teacher]

<p>I'd bet the farm XM receivers are passive. Receive only.</p><p>&nbsp;</p>