I have attempted to test using a 18" rp-tnc to n-male cable and the 15.4dbi antenna,
there was no change whatsoever in signal power on my Orinoco cards. I don't know what
the issue with the signal might be.
Thanks,
-db
-Daniel G. Brown
Senior Core Network Engineer
NMS Expert Team Member
Advanced Core Networking Team
Lucent Worldwide Services
972.745.4839 (Project Support Line)
"If anyone can show me, and prove to me, that I am wrong in thought or deed,
I will gladly change. I seek the truth, which never yet hurt anybody.
It is only persistence in self-delusion and ignorance which does harm."
-Roman Emperor Marcus Aurelius
-----Original Message-----
From: Enrique LaRoche [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 18, 2002 11:42 AM
To: Brown, Daniel G (Daniel)
Subject: RE: [BAWUG] Wireless range extension via antennae and output
amplifiers
Relocate the WAP to a waterproof enclosure and lose all but a couple of feet
of the LMR400.
Use directional antennas
Even if you put 2 waps in the box and two antennas each coveriing 180 deg.
I think you will see benefit from the lack of cable.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Brown, Daniel G
(Daniel)
Sent: Thursday, July 18, 2002 8:35 AM
To: [EMAIL PROTECTED]
Subject: [BAWUG] Wireless range extension via antennae and output
amplifiers
All-
I'm working on a personal project that basically involves linking up two
sites via 802.11b. I'm using Linksys WAP11 Version 2.2 (they're cheap and ok
for what I need) and my questions revolve around the use of antennae and
amplification. My setup is as follows:
I've got one Linksys WAP11 at my house, roughly 1 mile w/LOS to the other
site. The WAP11 is a Version 2.2 (so the SNMP commands don't work, mainly
because I can't find the default community anywhere, public doesn't work)
and it has a RP-TNC to N-Female adapter on it, connected to a 75' run of
LMR-400 that goes to the antenna. The antenna has a barrel-type lightning
arrestor on it for the 2-3ghz range (grounded to an isolated ground for
electronics) and is a 15.4dBi omnidirectional dipole antenna. There is an
identical setup at the other site. Basically, I'm attempting to determine
this; After replacing the antenna on the WAP11 with the more powerful
antenna, I show no increase whatsoever in signal strength. I'm getting a
slight bit more coverage, but not what I expected, and not nearly enough to
reach the 1 mile LOS that I wanted. (I didn't pick parabolic directionals
because I am also hoping to resell service (at nominal cost, mainly to
subsidize the T-1) to local business!
es and people from the T1 I'm pulling in).
Being a relative novice to wireless, though I do understand the concepts
involved, my questions are as follows:
1. Why, even after putting a 15.4dbi antenna on the wNIC in my laptop, my
range was not altered/increased to a WAP with a 15.4 dbi antenna on it.
2. Can the Linksys WAP11 v.2.2's power output be increased to the 100mW that
I believe it to be capable of, and how would one go about this? (The WAP11
v.2.2 has no USB port, and I can't seem to get the SNMP agent to respond,
I've tried all sorts of community strings to no avail). For the WAP11 v.1.0
it was easier, I reviewed details at http://www.pasadena.net/aprf/ and
because I can't communicate via SNMP, I can't attempt these alterations.
(I've even considered buying used WAP11 v.1.0s from ebay)
3. Even if the WAP11's power output is set at 100mW, will this be sufficient
to provide seriously increased range? And if it's already set at, say, 50mW,
why didn't the range increase from adding a more powerful antenna?
4. Would adding a 2.4 ghz amplifier boost the signal sufficiently?
5. (This is my truly novice question) Is there a good way to relate mW
output to dBm gain?
I pulled a lot of information from
http://www.byte.com/documents/s=1422/byt20010926s0002/1001_marshall.html,
but my questions remain.
Any assistance that can be rendered would be a great help. (And yes, I am
aware I work at a company that produces wireless equipment; however, it
would be rather unprofessional for me to go around asking company people
about a personal project, as I don't have any contacts in the wireless side
of things (I'm an ATM / FR / MPLS / IP network engineer). In addition, our
Orinoco product line was spun off with Agere Systems, so the people who
would REALLY be the ones to ask aren't in Lucent anymore.)
Thanks,
-Daniel G. Brown
Senior Core Network Engineer
Advanced Core Networking Team
Lucent Worldwide Services
"If anyone can show me, and prove to me, that I am wrong in thought or deed,
I will gladly change. I seek the truth, which never yet hurt anybody.
It is only persistence in self-delusion and ignorance which does harm."
-Roman Emperor Marcus Aurelius
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