SVDO and ESMR 800

[koiulpoi]

So, I have a question for those who know more than I do.

 

If a device has SVLTE, will it be able to connect to 1X on ESMR 800 simultaneously with LTE on PCS G-Block 1900?

 

If a device has SVDO, will it be able to connect to 1X on ESMR 800 simultaneously with EV-DO on PCS 1900?

 

Lastly, if a device lacks SVDO, will it be able to connect to 1X on ESMR 800 simultaneously with EV-DO on PCS 1900? If not, and in an area without LTE but with 800 (could happen due to coverage gaps or lack of full builds), will such devices be stuck on 1X for data if not fully on PCS?

 

I ask because, using a certain engineered PRL by a certain Digiblur, using my Note II (no SVDO, yes SVLTE), I was able to (seemingly) do 1X 800+LTE 1900, but not 1X 800+EV-DO 1900, and I'm curious about what the average customer experience will be.

[WiWavelength]

Yes, the answer basically to all of the above is yes.

 

Remember that, when VZW first deployed EV-DO, it did so exclusively as EV-DO 1900. Yet, much of its network is/was CDMA1X 850. And that was long before any SVDO devices became widely available. But devices had no problem operating on VZW's dual band CDMA1X 850 + EV-DO 1900 network.

 

AJ

[S4GRU]

So, I have a question for those who know more than I do.

 

If a device has SVLTE, will it be able to connect to 1X on ESMR 800 simultaneously with LTE on PCS G-Block 1900?

 

If a device has SVDO, will it be able to connect to 1X on ESMR 800 simultaneously with EV-DO on PCS 1900?

 

Lastly, if a device lacks SVDO, will it be able to connect to 1X on ESMR 800 simultaneously with EV-DO on PCS 1900? If not, and in an area without LTE but with 800 (could happen due to coverage gaps or lack of full builds), will such devices be stuck on 1X for data if not fully on PCS?

 

I ask because, using a certain engineered PRL by a certain Digiblur, using my Note II (no SVDO, yes SVLTE), I was able to (seemingly) do 1X 800+LTE 1900, but not 1X 800+EV-DO 1900, and I'm curious about what the average customer experience will be.

 

The answer to all your questions should be yes. You cannot run data on both EVDO and LTE at the same time. Your phone will not ever be connected to both EVDO and LTE simultaneously. However, it will still monitor EVDO when connected to LTE. That way it can reconnect and handoff quickly and easily when needed.

 

I have had a CDMA 800 and EVDO connection before.

 

Robert via Nexus 7 with Tapatalk HD

[digiblur]

I don't believe the band has anything do with it. It's all about the technology used. EVDO and 1X share the same transmission path.

 

To quote AJ's article:

 

Besides the incorporation of GSM/GPRS/EDGE 850/1900 and W-CDMA/HSPA 1900 capabilities, the most notable feature of the Note 2 is the lack of SVDO capability. That absence appears to be related to the inclusion of W-CDMA/HSPA, which coexists on a transmit path with LTE. In typical SVDO capable handsets, CDMA1X/EV-DO has one transmit path, but EV-DO has a second possible transmit path that it shares with LTE. That is not the case with the Note 2, as can be seen in the antenna locations and simultaneous transmission paths diagrams:

 

http://s4gru.com/index.php?/blog/1/entry-327-samsung-galaxy-note-2-big-enough-for-everything-except-svdo/

[digiblur]

Bam...three answers all at once

[WiWavelength]

I don't believe the band has anything do with it. It's all about the technology used. EVDO and 1X share the same transmission path.

 

And what you will see on non SVDO devices is a bounce back and forth between CDMA1X and EV-DO every few seconds. On most networks, CDMA1X is configured for a slot cycle index 2, which equates to a sleep/wake cycle every 5.12 seconds. The idle device will sleep, then wake every 5.12 seconds, and that is why the engineering screen will update your RSSI and Ec/Io every 5.12 seconds. While the CDMA1X side is asleep the EV-DO side will wake, and I cannot recall if I am thinking of my EVO 4G or my Samsung A900 flip phone, but some CDMA1X engineering screens will show the periodic flip between CDMA1X and EV-DO carrier channels.

 

AJ

[MacinJosh]

 

And what you will see on non SVDO devices is a bounce back and forth between CDMA1X and EV-DO every few seconds. On most networks, CDMA1X is configured for a slot cycle index 2, which equates to a sleep/wake cycle every 5.12 seconds. The idle device will sleep, then wake every 5.12 seconds, and that is why the engineering screen will update your RSSI and Ec/Io every 5.12 seconds. While the CDMA1X side is asleep the EV-DO side will wake, and I cannot recall if I am thinking of my EVO 4G or my Samsung A900 flip phone, but some CDMA1X engineering screens will show the periodic flip between CDMA1X and EV-DO carrier channels.

 

AJ

 

Every so many minutes I watch my iPhone switch back to 1x then back to 3G. Pretty seamless and doesn't affect my data that I never notice it.

 

 

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