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Lowest Db Reading on Your Cell Phone?

Discussion in 'GENERAL Wireless Discussion' started by Gamer03, Jul 30, 2004.

  1. Gamer03

    Gamer03 Technology Aficionado
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    I don't know if this has been posted before, but I was wondering what is the lowest db reading that you received on your phone?

    Mine was on July 16, 2004 on U.S. 550 South, 3 miles north of Durango, CO:

    -44 db's on my VGA 1000 on Sprint PCS

    How about everyone else?
     
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  2. Gideon H

    Gideon H Quase Três Anos Com WA!
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    Tell me the code to be able to get to the db's on my Motorola V600 and I'll tell ya ;).
     
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  3. Etorres777

    Etorres777 Life is good for now..
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    Same here :D
     
  4. Scrumhalf

    Scrumhalf Bronze Senior Member
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    You need to flex the V600 with the engineering flex file that will load up the field codes menu. Read the Moto faqs on HoFo. Pretty straightforward procedure but it will invalidate your warranty.
     
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  5. @TheRealDanny

    @TheRealDanny ALL IN
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    Last Saturday on July 24th I read (rx -37) over the bridge on Bear Valley Road where it crosses the 15 FWY in Victorville, CA. I get -59 at my place in Orange County and I used to think that was amazingly low. I thought wrong.

    I was using my Kyocera SE-47 Slider phone.
     
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  6. Yankees368

    Yankees368 Compulsive Signal Checker
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    At work, im sometimes no more than 20 feet from a building with almost every carrier on it. There, I can get readings in the low 40's and high 30's.
     
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  7. larry

    larry Sprint loyalist and former mod
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    I haven't seen anything below -46 dbs on my Sprint phones. And of course that's standing right under or next to a tower.
     
  8. Sprint PCS 411

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    What is a Db reading?

    How do you check you Db reaiding?

    Is it good to have i higher negative or lower negative number?
     
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  9. Gamer03

    Gamer03 Technology Aficionado
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    Maybe that was a fluke on my cell phone, but I might have gotten that low of a signal because the tower was on top of a mountain. ;)
     
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  10. Gideon H

    Gideon H Quase Três Anos Com WA!
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    Lol I've already invalidated it and this was after a warantee exchange that I did this so I'm all set and I will try it ;).
     
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  11. RichXKU

    RichXKU Once had +5 dBm RSSI
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    -18 dB holding my S46 up to a microcell antenna in the AT&T Store at Nittany Mall.
    It was an 8 foot ceiling at most with the 6" round panel clearly in the drop tiles.
    GSM 1900
    HEX ID: 466E

    I don't think the phone took that too well since I had to reboot it to get signal once I left the mall.
     
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    #11 RichXKU, Aug 11, 2004
    Last edited: Aug 11, 2004
  12. bobolito

    bobolito Diamond Senior Member
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    There's a misconception here. Some of you talk about the lowest dB reading you've seen, however, the correct term is the HIGHEST dB you've seen, NOT the lowest. Since these are negative numbers, that means that a reading of -44dB is HIGHER than -80dB. I posted a similar thread in the old forums as some of you may remember. To avoid confusion, I always refer to it as STRONGER/WEAKER, instead of HIGHER/LOWER. Therefore, the lower readings means the signal is weaker (going away from zero) and the higher readings means the signal is stronger (getting closer to zero).

    Anyway, the strongest signal I've ever measured is -20dBm while standing on 39th St and 8th Ave near Times Square in Manhattan. The panels were about a block away from me on a small 3-story building, right across the Port Autority on 40th st and 8th Ave. Getting closer to the panels didn't make the signal stronger. On the contrary, as I got closer to them, the dB went into the 30's and 40's so it seems like the optimal position was about a block away facing them directly. I was using my LG 4050 on the Cingular/T-Mobile network 1900Mhz. The phone didn't show any adverse/strange effects after this. It is strange that while using the Moto V400, every time I go there I don't get nearly as strong numbers. It usually doesn't get stronger than -35dB on the V400, but on the LG, signal looks stronger. Ironically, the V400 does better than the LG in weak areas.
     
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  13. Gamer03

    Gamer03 Technology Aficionado
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    Ok.

    Thanks for correcting me bobolito.

    Now I fully understand db readings. ;) :)
     
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  14. PLW47

    PLW47 New Member

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    We are in a very poor location in the central CA coastal mountains. Using a Yagi directional antenna and a 3 watt booster I've been getting -88 dB....but I have been able to make calls though the quality isn't great.
     
  15. Jay2TheRescue

    Jay2TheRescue Resident Spamslayer
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    I've seen readings in the -40's, and that's usually standing at the base of a tower.
     
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  16. larry

    larry Sprint loyalist and former mod
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    Wow this thread is very old! I was able to hit -29 dbs on my Sprint LX-350 phone only one time when right next to a cell site. Other than that I usually see as low as -40 dbs when near a cell site.
     
  17. Gamer03

    Gamer03 Technology Aficionado
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    Wow. Larry, you are right. This is an old thread. By the way, I started it on my 1 year anniversary at WA. :)

    I am in my house right now, and I am getting anywhere between -88 to -96 on my LG VX8600. The tower is 2 to 2.5 miles south of my house.
     
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  18. RichXKU

    RichXKU Once had +5 dBm RSSI
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    wow, almost 3 years later and I'm still subscribed to this thread. AND I've since beaten my record...

    +5dBm

    Yes that's right. on my Nextel i870 while standing 3 feet on front of the control channel antenna, only lasted for about 2 seconds before it became overloaded and went to no service. I have a pic somewhere.

    [​IMG]

    So, um... I WIN!!
     
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  19. Yankees368

    Yankees368 Compulsive Signal Checker
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    Now...I know you know more than me on this topic, but it looks to me like the phone is displaying a signal of -39dbm
     
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  20. larry

    larry Sprint loyalist and former mod
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    That's what it looks like to me as well.
     
  21. Andy

    Andy Diamond Senior Member
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    I got -19 one time I believe directly in front of a Verizon panel.
     
  22. RichXKU

    RichXKU Once had +5 dBm RSSI
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    The first number on the second line of an iDEN phone is the transmitter cutback, second number is the downlink RSSI. :)
     
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  23. larry

    larry Sprint loyalist and former mod
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    I would expect lower readings on 800 Mhz carriers who's sites typically put out a little more power.
     
  24. RichXKU

    RichXKU Once had +5 dBm RSSI
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    Not true. RF Field strength decreases (and increases) exponentially as you get farther (or closer) to a source. If someone is close enough to get a -19, then a difference of just a few feet would yield more variation than would the difference between 850 and 1900.

    It's very bad to use a blanket statement saying that low band cellular transmitter would be running more power than a PCS band transmitter. Power levels have to be balanced between the handset and the base and must take into account antenna type, beamwidth, downtilt, gain, etc.
    I know several PCS carriers are guilty of running more power to overcome the inherent loss that comes with being in the PCS band.
     
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  25. TelcomJunkie

    TelcomJunkie Bad Handoff Investigator
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    See Rich, now you're gonna make me go out and try to get better :D

    Hmmm... would it be cheating if I hooked the duplexer output into the phone?:browani: :browani: :browani:
     
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  26. QLR

    QLR RIP Note!
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    The lowest reading I've ever gotten was a -57 on my SCHA930
     
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  27. RichXKU

    RichXKU Once had +5 dBm RSSI
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    Of course not! ... You'd just need a new phone right away :O
     
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  28. larry

    larry Sprint loyalist and former mod
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    You should be able to easily top that.
     
  29. Fire14

    Fire14 Easy,Cheap & Sleazy
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    The best so far I have gotten on my Cingular phone was -44, this was a block away from an on building antenna.

    So far with the SprintNextel Buzz the best I have seen has been -58, I haven't tried it as close to a tower yet though.

    In my house the average for Cingular is -80 and for SprintNextel -95
     
  30. RadioFoneGuy

    RadioFoneGuy Powered by HTC FUZE
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    -8 dm on 850 GSM, I put my phone in front of a panel on top of a building just to see how low. I dont know about a + reading on db. The phone looks like -39. I have been close to alot of ants both 1900 and 850 and have never seen a plus number. Definately odd.
     

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