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Thread: E1820 External Antenna Connector

  1. #91

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    on contract...so i beter watch it :P

  2. #92

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    Quote Originally Posted by snake eyes View Post
    on contract...so i beter watch it :P
    Read this thread, be very careful!

  3. #93
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    I received a Poynting ADPT 026 sleeve adaptor to connect to my existing Poynting aerial. Interestingly (?) this existing aerial (yagi) was installed to boost my Neotel signal. (I divorced Neotel back in November when I switched to Cell C. I left the antenna up - as one does!)

    After buying a patch cable today from Poynting in Centurion - I slid the sleeve over the E1820 (no info on which way is up) and connected up, without any real belief it would make a difference. Hell, the antenna is not even pointing directly at the cell, but off by about 15deg.

    I should also mention I connect using a Dovado 3G (the first model).

    Sure enough - the speeds were basically unchanged, perhaps a little better, more toward 2 than 1.5. Waste of a trip I thought.

    I then decided to connect the E1820 directly to the desktop and also used MDMA to monitor RSSI. Goodness me! As I played with the sleeve, the RSSI moved up and down. The best I could get was -66! I then ran the speed test (sorry no link) - consistently all around 8Mbs (which I have never seen before). One of the tests topped out at 10.1Mbs!

    So a brilliant day, and how magical to be able to reuse my investment in the original Poynting antenna for Neotel!

    Only two flies in this ointment: why oh why does the Dovado (and Dlink DIR451) have such a dramatic impact on the speed? And does anyone know what is the optimum position for this ADPT026 on the E1820? i.e. which way up and middle or the ends? The RSSI does seem to change but I haven't found a sweet-spot!

  4. #94

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    Quote Originally Posted by Cost Conscious View Post
    why oh why does the Dovado (and Dlink DIR451) have such a dramatic impact on the speed? And does anyone know what is the optimum position for this ADPT026 on the E1820? i.e. which way up and middle or the ends? The RSSI does seem to change but I haven't found a sweet-spot!
    I also find that when I plug my E1820 Cell C stick into my Dovado UMR wireless router, my speed drops down to around 1.5 mbps. When I plug it direct into my MacBook Pro, the speed is always around 7.0 - 8.0 mbps !!! In the test, the Dovado was on the same table as the laptop, so it is not a location problem. If you find out why the Dovado drops the speed, and what the cure is, please let us know

    OH, BTW, the Black Cell C speedstick also runs very cool if it is plugged into the Dovado, but get very warm/hot when plugged directly into the MacBook Pro. So probably a software issue - allowing it to run at slower speed in the Dovado
    Last edited by surfs-up; 19-02-2011 at 09:33 PM.

  5. #95

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    IMHO this may be USB1.1 port on the router! I had the same with the long USB cable plugged into USB2 port. Becouse of the USB cpecs it switched to USB 1.1 mode.

  6. #96
    Senior Member 1geoff99's Avatar
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    Quote Originally Posted by Cost Conscious View Post
    And does anyone know what is the optimum position for this ADPT026 on the E1820? i.e. which way up and middle or the ends? The RSSI does seem to change but I haven't found a sweet-spot!
    The best signal I get is with the ADPT026 at the tip of the modem (as far
    from the USB connector as possible), with the antenna cable on the side of the
    modem's LEDs.

  7. #97

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    I'm kind of the opposite to Geoff - i have cable on lower side(opposite to LED) & push it on just over half way so i can still just see the LED with the back edge of the sleeve.
    Whatever works i guess
    "The problem with quotes on the internet is that you can never be certain they are real"-Abraham Lincoln

  8. #98
    Super Grandmaster ginggs's Avatar
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    Quote Originally Posted by Tun@ View Post
    I'm kind of the opposite to Geoff - i have cable on lower side(opposite to LED) & push it on just over half way so i can still just see the LED with the back edge of the sleeve.
    Whatever works i guess
    I get the best results in this position as well. I misunderstood initially. I push just over half of the inductive coupler on to the modem, so I can still just see the LED with the front edge of the sleeve.

    I have a (sort-of) official answer as to whether the E1820's external antenna connector is functional/enabled or not.
    I spoke to someone from Cell-C's network department who was very helpful in providing the locations of the closest towers.
    He also told me that when Cell-C do an antenna installation they always use an ADPT-026 inductive coupler, not a CRC-9 pigtail. He said they found the ADPT-026 more reliable.
    Last edited by ginggs; 04-09-2011 at 09:55 AM.

  9. #99
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    Quote Originally Posted by Tun@ View Post
    I'm kind of the opposite to Geoff - i have cable on lower side(opposite to LED) & push it on just over half way so i can still just see the LED with the back edge of the sleeve.
    Whatever works i guess

    I agree. The sleeve is pushed from the back towards the USB tip of the E1820 until the LED is partially visible. This seems to be the sweet spot.

    Updating my comment about the Dovado UMR: It does have a problem which Dovado is aware of, which throttles the speed. I've no idea whether they intend to fix it. I reluctantly decided to buy a Dovado 4G router and that solved the problem (speeds up to 9mbs observed).

    I'm selling my UMR mine on Gumtree at a hefty discount.

  10. #100

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    Quote Originally Posted by Cost Conscious View Post
    Updating my comment about the Dovado UMR: It does have a problem which Dovado is aware of, which throttles the speed. I've no idea whether they intend to fix it. I reluctantly decided to buy a Dovado 4G router and that solved the problem (speeds up to 9mbs observed).
    Glad I am buying the 4GR then... Also seems to be LTE "capable" so should be more future proof...
    Happy @home with www.ptawug.co.za

  11. #101
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    Anyone have any experience with the Uniterm Direct inductive coupler in terms of positioning on the E1820?

    Have just received my kit http://www.dbg.co.za/product_info.ph...products_id=95 and going to install this afternoon
    Quote Originally Posted by DJ... View Post
    The devastating stupidity that some of you lot show is truly mind-boggling...

  12. #102

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    Quote Originally Posted by OMB View Post
    Anyone have any experience with the Uniterm Direct inductive coupler in terms of positioning on the E1820?
    Read this post from RichardG. I personally couldn't get it right, but maybe he can help you out.

  13. #103
    Super Grandmaster ginggs's Avatar
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    Some tests with a Vodafone K4605 (Huawei E372).

    No antenna: -89dBm
    Poynting LPDA-A0044 + Poynting ADPT-026 (Inductive Coupler): -71dBm
    Poynting LPDA-A0044 + Poynting CAB-038 (Huawei Pigtail): -59dBm
    Last edited by ginggs; 03-05-2011 at 04:10 PM.

  14. #104
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    Quote Originally Posted by ginggs View Post
    I've updated the list in the first post. PM me if you have anything to add.
    Just a question on the E1820: is it better to use the universal coupler from the 11dBi GSM Booster Kit [LPDA11+] to connect this modem to the antenna, than a CRC9 male right angle SMA female cable?

  15. #105
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    Quote Originally Posted by PKruger View Post
    Just a question on the E1820: is it better to use the universal coupler from the 11dBi GSM Booster Kit [LPDA11+] to connect this modem to the antenna, than a CRC9 male right angle SMA female cable?
    See this thread on the external connector issue.

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