m_elkhishin
join:2004-11-06
| 400mw amplifier question
I have senao 2611ap3+ 200mw accesspoint with 8dbi omni antenna.I want to put 400mw booster to extend my network several kms, but the amplifier I bought has an input power limit of 20dbm(100mw)
will the amp. get damaged if I connect it to the 200mw access point?? |
|
bito
Premium
join:2001-10-08
Atlanta, GA
| Maybe, maybe not. But I know for a fact it won't run well at all. Amps are designed to work in certain power ranges, and if you exceed to ranges then you will push it into an overload scenario and not function properly. As to whether or not it goes *poof*, that depends on your karma  |
|
superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| reply to m_elkhishin
This is a bad idea, as most amps can only handle 100mW or less on the input side. By running 200mW into it, You will overdrive it, causing distortion, which will destroy any usable signal. I would skip the amp and go with a different antenna, as antenna gain is 20 times better than amp gain any day.:)
--
»www.wavecrazy.net Join WISPA today! »www.wispa.org/ |
|
cmaenginsb
Premium,MVM
join:2001-03-19
Palmdale, CA | reply to m_elkhishin
Yes, putting too much power into the amp can damage the circuits, additionally you will overdrive the amp and produce more noise than usable signal.
Additionally depending on type of amp you won't get a better signal. |
|
anoclon
join:2004-10-12
Guatemala
| reply to m_elkhishin
Lower your senao output power to 100mw or less. The total output power of the system will be the total power of the amplifier only (400mw, less attenuation of cable run from the amp. to the omni). The amplifier will always outputs a power of 400mw regardless of the input power from your radio, so you may lower your senao output power to 32 mw and the total power output always will be 400mw. If you were thinking that your total output power of the system would be adding the 200mw from your radio + the 400mw output power of the amplifier you were wrong. I assume you were thinking that. |
|
m_elkhishin
join:2004-11-06
| reply to m_elkhishin
the 400mw rated power of the amplifier is the max power output the amplifier can make. the amplifier adds power to the input power according to its rated tx gain but the result of this addition will not exceed 400mw. for example if the amplifier have tx gain of 12db and you have a card with 20dbm(100mw) and a cable and connector loss of 3db, then the amplifier will add only 9db to the system to make the output power 26dbm(400mw).my question is if I connect a unit with 200mw outputpower to an amplifier with 100mw input power will it burn the amplifier???
NOTE : the senao Accesspoint can not be lowerd down:( |
|
m_elkhishin
join:2004-11-06
| reply to m_elkhishin
what if I put 6meters of rg58 cable between the AP and the amplifier? the cable and connector losses will exceed 3db, which makes the effective power reach the amplifier not more than 20dbm. I think this will solve the problem .BUT will the recieved signal be attenuated in the cable and result to bad reciption or the amplifier will boost the signal overcome the cable loss?????? |
|
mrbueno
join:2002-08-03
US | reply to m_elkhishin
Here is a suggestion. How about buying a lower powered card to run your amp? Just a thought. |
|
cmaenginsb
Premium,MVM
join:2001-03-19
Palmdale, CA
| reply to m_elkhishin
You'll have to look at the recieve specs on the amp but most amps do amplify the recieve.
As to answering your question, didn't I do that 2 posts above your post?
Not only will you burn the amp out you'll overdrive it and create more noise than signal. You'll actually have a negative effect by doing this.
Now my question is why use an expensive amp to get 3 db when you can simply get a higher gain antenna. |
|
wispman
join:2004-12-21
USA | reply to m_elkhishin
Did we cover the fact yet if you really NEED an amp and if it is legal? What country? |
|
m_elkhishin
join:2004-11-06
| reply to m_elkhishin
thank you all for your support
I am in egypt wireless systems are very new here.I hardly find the required parts to do my job.from the connectors ,the 50ohm coaxial til the accesspoint itself. I have only afew selections to select from. SENAO or dlink and sometimes linksys. I searched the market for about 2monthes till I found my 8dbi omni antenna. otherwise I would have to make a hand made one. I made my client side antennas by using tv dishes and home made feeder. and I could reach a distance of about 8km with very good signal.
I cant find any greater gain antenna so I have to deal with my antenna and the system available here and try to improve its performance with the most available parts.The only way I found to do this job is to use an amplifier.and this is the only available amplifier I could find here.
I think we are inventing the wheel here, but we must try:D |
|
epekarik
join:2005-05-17
Cincinnati, OH
|  reply to m_elkhishin
In another post
In another post, sorry can't find it :-( , somone mentioned that coax
amplifier should not be put before a cable modem. there was no explanation why.
I have four (two out plug) splitters (5-1000Mhz) -3.5db in the house.
I saw this on e-bay, I wonder if I could put this on the line as it comes into
the house, before all these splitters.
Full bandwidth bi-directional amplifier
capable of both forward and return communications.
Increases signal strength up to 32 times (15dB).
FEATURES:
Two-way Capable
1 GHz bandwidth
Die-cast housing
CATV Industry Standard
5 to 40 50 1000 MHZ
Thank you! Endre |
|
