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jeremyandrew

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About jeremyandrew

  • Rank
    Member Level: 1x Advanced

Profile Information

  • Phones/Devices
    Samsung GS3 stock/rooted, iPhone 4S
  • Gender
    Male
  • Location
    Erie, Pennsylvania
  • Here for...
    4G Information
  • Favorite Quotation
    A lack of planning on your part does not constitute and emergency on mine.
  • Interests
    Spending quality time with the wife and kids, photography, ham radio, wireless infrastructure.
  1. Stumbled across a new 2.5 sector in the wild. It's not live yet, but when it is, it will be covering Heinz field in Pittsburgh. Sent from my iPhone using Tapatalk
  2. LC connectors are not "two fiber", each LC connector supports a single piece of glass. This design is odd in the fact that it uses a single fiber for TX/RX. I have stress tested the Single-mode fibers in a hybrid cable and they do just fine at 1Gbps throughput. 1 fiber from each RRH goes to each of the 3 channel cards, that is of course assuming an 8T8R configuration.
  3. The fiber "cans" have 4 LC connections in them. And a single fiber runs full duplex, TX and RX are different wavelengths and the GBICs are specific to the Radio head or the element they are seated in.
  4. Backhaul upgrades are moving along nicely in Erie(and the rest of PA), but no LTE as of yet. I know what that blip is and I wish I could tell you that you will be seeing more of them, but all of the sites are still ground mounted.
  5. I've worked in the industry for over 12 years and I can tell you that there is no static number. With that being said, A fully-built "standard capacity" Samsung site with 800, 1900, and 2500 will have 96 individual RF connectors.This is assuming that all of the radio heads and antennas are mounted on the T-frames at the top of the tower. Other OEMs have splitters, combiners, amplifiers, lightning protectors, etc.. and I am not familiar with those setups.
  6. Caught a decent shot of a 2.5 RRH just before the tower crew flew it. I got pulled into a ticket for an outage at the site and noticed the door was open, so I went for a ride to see who was there. I added another photo of the entire assembly as well. Because of the way they had to mount the pole to the t-frame, they couldn't connect the jumpers until it was secured.
  7. I was out that way a couple of weeks ago to hit a few sites. Here's a shot of Scranton from the site on the Sandone tire warehouse on Wyoming Ave. and the scary elevator which is the preferred method of accessing the roof as there are no stairs.
  8. The VA hospital is a no-go and the legacy cabinet was powered down to prevent dropped calls. I'm not sure where it is in relation to Public Square, but that site has additional RRHs and antennas.
  9. I have worked on all of the CDMA vendors in NA and Samsung certainly isn't the worst. One of the biggest changes is switching to a 100% IP based cabinet. The controller in the MMBS is basically a computer with a bunch of Gigabit NICs... Some copper, some fiber.
  10. There's a lot of work going on in the Lackawanna valley, some sites may even have commercial 800 LTE soon if they don't already.
  11. Again, there really is no way to quantify 100% power, but in Montana, especially in the more rural areas, there are fewer users so the footprint of a given site will be larger. I've seen sites register on my test gear about 60 miles out, but the conditions were perfect. That brings up another subject... Propagation. There are factors that will affect your reception that are not in the physical realm; solar conditions, EMI, other RF, atmospheric conditions, etc...
  12. All kidding aside, if the power was constantly cranked to 100%, your phone would never work right. Just as Robert mentioned, forward link and reverse link power is a delicate balance. If a handset fails to listen to the power control commands sent by the BSC, it can shut down an entire sector. Yes, a single 300mW handset can destroy the reverse link if it's close enough and doesn't power down when told to. The forward link power isn't as critical as the reverse link, but if it's too high, you'll never hand off properly and you would drop calls left and right.
  13. Those are Nortel Base Stations, 3030s I beleive. Tons of those were deployed in Indiana by Ubiquitel.
  14. The Samsung radio heads are incapable of outputting more than 40 Watts per carrier "channel", but for every carrier you add to a radio, the power of the other carriers must be reduced in order to prevent interference. A big factor for CDMA is how many users are on each sector/carrier. The more users you have, the lower the power output is. Defining a generic distance that each sector covers is impossible, I could spend days coming up with factors that affect how individual sector/carriers operate Legacy systems used tower top pre-amplifiers and massive ground mounted bi-directional amplifiers to overcome the loss in the feedlines and attempt to increase the footprint of a site. With the new remote radio heads, that loss in no longer an issue.
  15. Other than having the fiber and power access covers off, I haven't opened an RRU. They are all under warranty and Samsung has multiple seals on every radio.
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