superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| reply to bito
Re: Deliberant PtP test link w/ problems
I hope You don't have those units laying side by side when You are doing this?, If so, You may have already burned out the recieve side of those radios because of way to much much power. They should be a LEAST 100 yards apart or more when testing.:)
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omahajim
join:2002-09-06
Omaha, NE
| Re: 1300's next to each other during bench config: said by superdog  :I hope You don't have those units laying side by side when You are doing this?, If so, You may have already burned out the recieve side of those radios because of way to much much power. They should be a LEAST 100 yards apart or more when testing.:) superdog: I understand what you are saying; what if I had only one on at a time, then turn down the power to minimum during that initial config, then keep them pointed away from each other during the bench test? Then only turn them back up once they get to the site, using the minimum power (plus fade margin) needed for the trip to the AP?
Also, how would you account for something like the 1100-T that has two radios in it (250mw each?) ? I will be setting up some 1100-T dual radios as repeaters, to extend service to a couple customers located in holes of my main AP coverage:
AP > [WLAN1]working client w/1100T[WLAN2] > 1300A client that is NLOS to AP
The 1100-T's WLAN1 will be on Ch1 with the built-in directional, WLAN2 on Ch11 with an omni, with the 1300A client at the end using the built in directional back to the 1100-T's omni. There will actually be a few customers with 1300-A's leeching off the WLAN2 of the 1100-T which is why there will be on Omni on WLAN2. What would be different in this scenario (with respect to desense or overdriving each other's receive front ends) then two 1300-A's close together?
And while I'm on the subject of reducing power to the lowest required power to do the job (from my ham radio days), would that increase the problems with "hidden transmitter syndrome"? If a number of client radios served from a particular AP can't "hear" each other, will that create lots more retries from collisions?
Thanks
Jim |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| said by omahajim :Re: 1300's next to each other during bench config: superdog: I understand what you are saying; what if I had only one on at a time, then turn down the power to minimum during that initial config, then keep them pointed away from each other during the bench test? Then only turn them back up once they get to the site, using the minimum power (plus fade margin) needed for the trip to the AP? Also, how would you account for something like the 1100-T that has two radios in it (250mw each?) ? Just turning them away from each other and 10 ft apart should be fine as mentioned earlier. With units that have PCMCIA cards in them, just disconnect the external antenna and You will be fine. Dual radios AP's and repeaters usually have external antennas only , so there won't be a problem as long as they are disconnected.:)
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| I thought I might throw a word of caution. Some units that have integrated antennasCAN NOT be operated without the antenna disconnected or a dummy load in place. If You do this, the radio will burn out almost instantly.(See the instruction manual!:D)
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omahajim
join:2002-09-06
Omaha, NE
| reply to superdog
Thanks superdog for the replies. However, I'm still not sure if I understand your answer.
I did see the other post from you about dummy loads and plugging in antennas. However, the Deliberant dual radio 1100-T comes with two N-Male pigtails, with the option of one of those being an internal directional antenna instead of the pigtail.
So, in normal operation for example, the 1100-T might have a 14dB directional antenna and an omni on it. Those antennas would be in close proximity to one another, at I would assume full power levels. Would that not be any different than a pair of DLB1300-A's in the shop?
Thanks for your insight.
Jim |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| said by omahajim : Would that not be any different than a pair of DLB1300-A's in the shop? Thanks for your insight. Jim Almost, except that they would be 0n 2 different channels, so the distance wouldn't matter.:)
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