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WiWavelength

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Everything posted by WiWavelength

  1. WiWavelength
    So, VZW wants to push VoLTE handsets -- in other words, phones that will have highly inconsistent rural voice coverage. Hmm, I think we already have that. It is called T-Mobile. AJ
  2. WiWavelength
    That sounds like *your* problem. AJ
  3. WiWavelength
    It is relatively significant. A 3.78 dB increase represents a 139 percent increase. In other words, if a handset has a max power output of 100 mW and that output is increased by 3.78 dB, then max power output goes up to 239 mW. I think the dual antenna system in the HTC One, though, will provide a more significant improvement in RF performance than will any increase in max power output. Just to be clear, the 23 dBm figure that I referenced was for PCS 1900 MHz. Lower frequency bands often have lower max power output because their path loss is also lower. For example, the AT&T HTC One has a max power output of just 15.52 dBm for LTE 700. AJ
  4. WiWavelength
    Yeah, real old school. AJ
  5. WiWavelength
    But what about the pongs? AJ
  6. WiWavelength
    If you are looking for bracket makers, try ESPN's Joe Lunardi. AJ
  7. WiWavelength
    PN is short for PN offset, or more accurately, Pseudo Noise offset. Think of it as representing a site sector, as each local sector must use a different PN. AJ
  8. WiWavelength
    Your handset is not really concerned with RSSI. It is merely a means to calculate Ec/Io. So, your idle handset uses Ec/Io to determine on which PN it will camp. And at a typical slot cycle index setting, your idle handset reevaluates Ec/Io among available PNs every 5.12 seconds. AJ
  9. WiWavelength
    Yeah, jhtechservices and blkkatana sure do have a lot of hiss and static in their posts. AJ
  10. WiWavelength
    Think of Ec/Io simply as a measure of signal quality. It is the ratio of the pilot channel to the total power (signal, noise, interference) in the carrier channel. Ec/Io is always negative -- the more negative it gets, the worse the signal quality. CDMA1X devices track Ec/Io down to -31.5 dB, but below roughly -20 dB Ec/Io is unusable. AJ
  11. WiWavelength
    That depends on what you consider to be the problem. Your -101 dBm RSSI on CDMA1X 1900 right now may be perfectly usable most of the time, but it certainly does not leave much margin for fades or cell shrinkage. CDMA1X 800 should give you a higher RSSI, but your pilot pollution likely will not change. Your handsets hops among four different PNs because they are of similar but varying Ec/Io. As long as CDMA1X 800 is deployed on all four PNs, you will still experience similar but varying Ec/Io among those four PNs. Thus, your handset will continue to jump around as signal/network conditions fluctuate. AJ
  12. WiWavelength
    Is this with any interactive map in particular? Many of the maps included hundreds to thousands of sites, so they can be processor/memory intensive to load. AJ
  13. WiWavelength
    I have had it happen many times. If the URL does not end in a standard image extension, then IP.Board will not embed it. So, I usually just grab the image to local disk, then upload to a free image host. AJ
  14. WiWavelength
    Three different carrier channels of CDMA1X, EV-DO, or a mix? Regardless, both are 3G. AJ
  15. WiWavelength
    Those questions cannot be answered with generalizations. No two situations are exactly alike. Depending upon the type of building construction, someone could have a strong signal outside and no usable signal inside. Regardless, your CDMA1X 1900 signal is exceedingly strong outside and still quite strong inside. In that location, CDMA1X 800 will provide you little benefit because CDMA1X 1900 already serves you very well. AJ
  16. WiWavelength
    Many refer to the Cellular 850 MHz band somewhat archaically as "800 MHz," but that is really a misnomer because it is too easily confused with the SMR 800 MHz band, as is the case here. Also, VZW is but one of many CDMA1X 850 carriers -- though, VZW has bought up a lot of them. But Sprint does not roam exclusively on VZW. Sprint has many other CDMA1X 850 roaming partners in various parts of the country. AJ
  17. WiWavelength
    As I state in the article, antenna 0 is the primary for CDMA2000, while antenna 1 is the primary for LTE. So, if both antennas are active for SVLTE, then I do not believe that there can be any switching between the two. However, if only one antenna is active, as is likely to be the case most of the time, then the front end monitors both antennas and switches between the two as signal conditions fluctuate. Correct, all of the ERP/EIRP figures are for maximum transmission. FCC authorization does not require any testing of reception. So, the transmitted power measurements have to serve as a yardstick for overall RF performance. However, the correlation between high power output and general reception does not always hold up. It is just the best that we can do with the data available. AJ
  18. WiWavelength
    Is that the Little Dick's Halfway Inn parking lot? AJ
  19. WiWavelength
    Roam...if you want to... http://www.youtube.com/watch?v=pCUnzcUMJHc AJ
  20. WiWavelength
    Going forward, Samsung wants to use its own processors. Qualcomm Snapdragon is a longshot. And software defined radio is one of the most over hyped technologies in recent memory. It does not mean software defined antennas and power amps. AJ
  21. WiWavelength
    I am driving the bus, apparently, so I do not have time to sample the windows. AJ
  22. WiWavelength
    Has Isaiah met mellimel? Something tells me you two are like peas in a pod. AJ
  23. WiWavelength
    Did Robert not get all that he could eat at the KFC buffet, feel cheated, thus return and burn the place down? AJ
  24. WiWavelength
    Rickie, please elaborate. What are you talking about? AJ
  25. WiWavelength
    Good, I am glad that you found the info you were seeking. Antenna gain is not always included because it does not have to be disclosed. The FCC is primarily concerned that the device meets certain RF emission standards. If those standards can be met with a high gain or low gain antenna, then the FCC could not care less. But from my experience, when antenna gain is listed, it is usually in the -5 dBi to 2 dBi range. As for Wi-Fi output power, it is interesting that the HTC One seems to be using the same antenna structure as the EVO LTE. But the HTC One offers considerably higher ERP. See the HTC One figures below: 249.459mW for 2412 ~ 2462MHz 280.543mW for 5745 ~ 5805MHz 2.4GHz: PIFA antenna with -2.94dBi gain 5.0GHz: PIFA antenna with -2.35dBi gain AJ
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