E1820 External Antenna Connector

We have done various tests on the E1820, and the connector on there (without getting too technical) is only for diversity and is not for an antenna connection. Thus the best adaptor will be our inductive coupler (universal USB adaptor ADPT-026) This following kit will significantly boost a weak signal and increase your speed drastically.

The antenna kit that comes with 7m cable and the 3G adapter cable for example the ADPT-026 (Universal USB modem to antenna adapter)
This antenna is robust and meant for a fixed, outdoor installation. The antenna has a gain of 11dBi and covers the 820 - 1000 MHz and 1710 - 2800 MHz frequency bands. (that just means it will boost any signal from GSM, GPRS, EDGE (2G), 3G, HSDPA + and up the UMTS band. It is just over 1 m long and looks very similar to an old M-Net antenna. It is supplied with a U-bolt that allows you to fit it to mount it on a pole up to 50 mm in diameter.
The propagation pattern of the antenna is +- 45 degrees and that do not mean that it needs to be pointed exactly to the base station that is 3G enabled. This is very easy to install and really a D.I.Y task. You just need to point it in the general direction of the cell phone tower and the antenna also comes with instructions on how to get the best results. Let me know if you require an installation quote.
If you are not for whatever reason happy with the results, we do have a 14 day return policy. Send it/bring it back within 14 days and we will refund the cost of the antenna (excluding the postage there and back).

The price below includes the VAT but Excludes postage. Should you want to send it with normal post within South Africa it costs +- R80.00 or you can collect from our offices in Cape Town, Pretoria in JHB and Durban.
Alternatively we can courier it to you for R 114.00 including VAT. Let me know and I will forward you the invoice and you may then pay by Credit Card or by EFT and forward me the proof of payment to that I can organize that it gets couriered.

K-LPDA-A0044-7M High gain antenna kit with 7m cable and ANY ADAPTER (ADPT-026 for the E1820) R 1,265.40 including VAT

Have a look on our on-line website for more information on this product and the good feedback this product has been getting:
http://www.poyntingdirect.co.za/pCOMB-044/the-BigBoss-Antenna--7m-cable--modem--phone-couplers.aspx
 
Last edited by a moderator:
pagel said:
We have done various tests on the E1820, and the connector on there (without getting too technical) is only for diversity and is not for an antenna connection.
Click to expand...
So were you able to measure any improvement in terms of received signal strength, throughput or latency when using the the E1820's antenna connector?

In other words, how could you tell it is for diversity and not just disabled?
 
Hi All

I've been trying to get a more stable signal in Sunninghill. For the most part I get pretty good speeds, but my signal strength can vary from between -79db and -98db without an external antenna.

I have the following at hand:
A-LPDA-0020 antenna
7m cable
Inductive coupler
Pigtail (think its a CAB-038)

Today I climbed onto the roof (roof of a double story ~8m up) laptop in hand a did some tests:
Baseline:
Modem plugged directly into laptop, no external antenna
RSSI: -93db, Tower ID 19141

Pigtail connected to antenna:
Direction RSSI TowerID
North -93 19141
East -93 12201
West -93 19141
South -93 12201

South East -93 19141
North East -93 19141
North West -93 19141
South West -93 13271/12201

Inductive coupler connected to antenna:
Direction RSSI TowerID
South -87 19141
East -89 19141
North -89 19141
West -83 12201

North East -91 19342
North West -87 12201
South East -91 13271
South West -95 13271

I left the antenna pointed West. This was interesting as the closest tower to me is actually 900m to the South. The tower to the west is 1.15km away, so not such a huge difference.

Tests from inside:
Baseline: -89db TowerID 12201/13271 (switches)
Speed test doesn't seem to complete

With Inductive coupler: -77db TowerID 12201
http://www.speedtest.net/result/1055906587.png
Pretty horrible considering the signal strength

With pigtail: -89db TowerID 12201
http://www.speedtest.net/result/1055909381.png

Second test with inductive coupler:
http://www.speedtest.net/result/1055911350.png

I can conclude that the pigtail is definitely the better option, however, you won't see a gain in the reported signal strength. Also, I get the feeling that the modem will still jump towers (i.e. ignoring the diversity antenna)

Please send any suggestions or anything you would like me to test out. I'm still a noob at this :)

On another note, I will most likely switch to a A-LPDA-0044-01 on Monday.

Regards,
Glipsie
 
Glipsie said:
Hi All

I've been trying to get a more stable signal in Sunninghill. For the most part I get pretty good speeds, but my signal strength can vary from between -79db and -98db without an external antenna.

I have the following at hand:
A-LPDA-0020 antenna
7m cable
Inductive coupler
Pigtail (think its a CAB-038)

Today I climbed onto the roof (roof of a double story ~8m up) laptop in hand a did some tests:
Baseline:
Modem plugged directly into laptop, no external antenna
RSSI: -93db, Tower ID 19141

Pigtail connected to antenna:
Direction RSSI TowerID
North -93 19141
East -93 12201
West -93 19141
South -93 12201

South East -93 19141
North East -93 19141
North West -93 19141
South West -93 13271/12201

Inductive coupler connected to antenna:
Direction RSSI TowerID
South -87 19141
East -89 19141
North -89 19141
West -83 12201

North East -91 19342
North West -87 12201
South East -91 13271
South West -95 13271

I left the antenna pointed West. This was interesting as the closest tower to me is actually 900m to the South. The tower to the west is 1.15km away, so not such a huge difference.

Tests from inside:
Baseline: -89db TowerID 12201/13271 (switches)
Speed test doesn't seem to complete

With Inductive coupler: -77db TowerID 12201
http://www.speedtest.net/result/1055906587.png
Pretty horrible considering the signal strength

With pigtail: -89db TowerID 12201
http://www.speedtest.net/result/1055909381.png

Second test with inductive coupler:
http://www.speedtest.net/result/1055911350.png

I can conclude that the pigtail is definitely the better option, however, you won't see a gain in the reported signal strength. Also, I get the feeling that the modem will still jump towers (i.e. ignoring the diversity antenna)

Please send any suggestions or anything you would like me to test out. I'm still a noob at this :)

On another note, I will most likely switch to a A-LPDA-0044-01 on Monday.

Regards,
Glipsie
Click to expand...

Are you saying that with the external connector is better than inductive coupler? Can you please do few more tests during different times (if possible). Sometimes only one test might give unreliable results.

...No need to climb on the roof again :D
 
Hi, some more tests:

Pigtail Tower ID 12201 RSSI -87:
Midrand (Neology): http://www.speedtest.net/result/1058113244.png
CapeTown(Vodacom): http://www.speedtest.net/result/1058112393.png
London (TranceFM): http://www.speedtest.net/result/1058111489.png
New York (Optimum Online): http://www.speedtest.net/result/1058110594.png

Ping Test: http://www.pingtest.net/result/29539020.png

Inductive Tower ID 12201, RSSI -83:
Midrand(Neology): http://www.speedtest.net/result/1058116648.png
CapeTown(Vodacom): http://www.speedtest.net/result/1058117503.png
London (TranceFm): http://www.speedtest.net/result/1058118236.png
New York (Optimum Online): http://www.speedtest.net/result/1058119171.png

Ping Test: http://www.pingtest.net/result/29539112.png

No antenna:
RSSI -89db Tower ID 12201, later changed to 13271 same db
Ping Test: http://www.pingtest.net/result/29539379.png
London (TranceFm): http://www.speedtest.net/result/1058123636.png
New York (Optimum Online):http://www.speedtest.net/result/1058120562.png
At this point the connection died. Connecting the pigtail changes the tower back to 12201 and revives the connection

I must say that I prefer the pigtail. It works better than the inductive coupler 90% of the time. The other 10%, the modem decides it can get a better signal from tower 13271, switches to it, and then my connection dies. Connecting up the inductive coupler at this point allows me to continue as normal
 
If it changes to tower to 13271 from 12201 don't you have to re-align the antenna as well?
 
I haven't noticed that speed test were taken inside, so we already can come with some thoughts. This is unusual example because signal strenght inside is 4dBm stronger than on the roof. The internal antenna can find the same Cell ID as the external antenna and similar strenght. It makes good conditions for receive diversity operation with the external antenna connected by pigtail. The inductive coupler reduces signal by 6dBm and also kills receive diversity. It looks like receive diversity is the main contributor here.

What happen if you put modem inside metal can?
 
marlboro said:
If it changes to tower to 13271 from 12201 don't you have to re-align the antenna as well?
Click to expand...

In the tests above it changed when the external antenna wasn't connected. If you mean when the pigtail is connected, then yes you would have to, but seeing as I don't feel like climbing onto the roof every time this happens, its just easier to swop the pigtail out for the inductor.
 
sajunky said:
I haven't noticed that speed test were taken inside, so we already can come with some thoughts. This is unusual example because signal strenght inside is 4dBm stronger than on the roof. The internal antenna can find the same Cell ID as the external antenna and similar strenght. It makes good conditions for receive diversity operation with the external antenna connected by pigtail. The inductive coupler reduces signal by 6dBm and also kills receive diversity. It looks like receive diversity is the main contributor here.

What happen if you put modem inside metal can?
Click to expand...

I will try this a bit later
 
Is there a site with the GPS loactions of the CellC towers so I can point my antenna at their tower. I can visually see a couple of towers but do not know which is the CellC one, especially as I get better reception pointing the sticjk in a completely different direction.
 
steve-rsa said:
Is there a site with the GPS loactions of the CellC towers so I can point my antenna at their tower. I can visually see a couple of towers but do not know which is the CellC one, especially as I get better reception pointing the sticjk in a completely different direction.
Click to expand...

I am also looking for something like this, or a software program or something that will show you where the base stations is etc....anyone?
 
Hi Guys

I have swopped my antenna for a A-LPDA-0044-01. Haven't really had the time to align it properly, right now its in the general direction of tower 12201.
I don't have a can available at present, best I could do was a mettle salad bowl:

Baseline
Cell ID: 12201
RSSI: -99dB

Speedtest:
Ping 495
Download does not start


Pigtail
Cell ID: 17942
RSSI: -93dB

Cannot access the speedtest site


Inductive
Cell ID: 12201
RSSI: -81dB

3.4Mb down. 3.06Mb up
http://www.speedtest.net/result/1061325529.png

This is expected - for those who don't know why, read the whole thread.
 
steve-rsa said:
Is there a site with the GPS loactions of the CellC towers so I can point my antenna at their tower. I can visually see a couple of towers but do not know which is the CellC one, especially as I get better reception pointing the sticjk in a completely different direction.
Click to expand...

If you own a Jailbroken iPhone, you can download an App from Cydia store called 'Signal'. This will show you, on a google map, all the towers around you, signal strength of each tower, as well as the tower you are currently connected to. You will obviously need a cell c sim in the iphone. :)
 
renierp said:
If you own a Jailbroken iPhone 4, you can download an App from Cydia store called 'Signal'. This will show you, on a google map, all the towers around you, signal strength of each tower, as well as the tower you are currently connected to. You will obviously need a cell c sim in the iphone. :)
Click to expand...
Fixed that for you, the 3G and 3GS don't do UMTS 900.
 
That's cool, any Android applications that can do this ?

I refuse to buy Apple products, just too restrictive.
 
So what's the easiest to get a hold of cheap, retail antenna, that is easy to use and works well?

Please help.
 
Jola said:
That's cool, any Android applications that can do this ?

I refuse to buy Apple products, just too restrictive.
Click to expand...

They are only restrictive if you do not jailbreak them. Jailbreaking opens up another world of possibilities!

Anyways, back on topic, no android twin AFAIK
 
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