by Andrew J. Shepherd
Sprint 4G Rollout Updates
Friday, October 5, 2012 - 2:00 PM MDT
Earlier this week, the Samsung SPH-L900 authorization filing hit the FCC OET (Office of Engineering and Technology) database. Judging by the handset's expansive 150 mm x 80 mm dimensions, S4GRU firmly expects this device to be the upcoming Sprint version of the Samsung Galaxy Note 2 "phablet." In keeping with our previous articles on the HTC EVO 4G LTE, Samsung Galaxy S3, Motorola Photon Q 4G, and yet to be released LG Eclipse, here is an RF focused breakdown of the presumed Note 2's FCC disclosed tech specs:
- CDMA1X + EV-DO band classes 0, 1, 10 (i.e. CDMA1X + EV-DO 850/1900/800)
- LTE band 25 (i.e. LTE 1900; PCS A-G blocks)
- LTE 5 MHz FDD carrier bandwidth
- LTE UE category 3
- W-CDMA/HSPA band 2 (i.e. W-CDMA/HSPA 1900)
- GSM/GPRS/EDGE 850/1900
- GPRS/EDGE multislot class 10 (i.e. max 4 downlink, 2 uplink, 5 total timeslots)
- 802.11a/b/g/n Wi-Fi
- SVLTE support, including SVLTE and simultaneous Wi-Fi tether (2.4 GHz only)
- SVDO support absent
- Maximum RF ERP/EIRP: 20.03 dBm (CDMA1X/EV-DO 850), 24.46 dBm (CDMA1X/EV-DO 1900), 20.25 dBm (CDMA1X/EV-DO 800), 28.35 dBm (GSM 850), 25.05 dBm (EDGE 850), 29.44 dBm (GSM 1900), 24.13 dBm (EDGE 1900), 21.41 dBm (W-CDMA 1900), 19.63 dBm (LTE 1900)
- NFC antenna integrated into battery cover
- CDMA1X/EV-DO Rx antenna diversity
- Antenna locations: (see FCC OET diagram below)
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:
Within each transmission path, only one airlink can be active at any given time. This is a hardware restriction that precludes SVDO but allows SVLTE. Additionally, some other simultaneous transmission scenarios that are technically supported by the hardware (e.g. CDMA1X voice + W-CDMA data) are locked out in software. For all of the possible and permissible simultaneous transmission scenarios, see the included table from the FCC filing:
In conclusion, if SVDO truly was sacrificed in order to include W-CDMA, that is a curious compromise, especially for a handset otherwise geared (e.g. band class 10 CDMA1X, band 25 LTE) specifically for Sprint.
Source: FCC
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