The question is, how do you tell which pigtails are good and bad?
And more importantly why are the bad ones bad?

Is it the cable quality, the connector quality, the crimping/soldering ofconnector to cable? Is it the Ufl connector getting bend/loose where it clamps to the radio connector?

Is there are more durable pigtail that gets around the problem?

Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband


----- Original Message ----- From: "Blair Davis" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Thursday, March 02, 2006 11:58 AM
Subject: Re: [WISPA] Pigtails..... and 5.8GHz low power....


Some interesting results of pigtail testing.....

Link is 7.9 miles. There is eyeball LoS with no fresnel zone incursions. Antennas are V-pol. Calculated link is -63db.

Client end:

RouterBoard 230 with MikroTik 2.9.13
SR5 card set to default TX power
u.fl to N-female pigtail
5 ft LMR-400 jumper
Hyperlink HG5827G 27db grid

AP end:

RouterBoard 230 with MikroTik 2.9.13
SR5 card set to default TX power
u.fl to N-female pigtail
5 ft LMR-400 jumper
Hyperlink HG5817P 17db sector

AP reports client at -71 with -100 noise floor

Test u.fl pigtails new in wrapper.

#1   AP reports client at -71
#2   AP reports client at -82
#3   AP reports client at -74
#4   AP reports client at -72
#5   AP reports client at -71

Obviously, not all new u.fl pigtails are the same.

Test mmcx pigtails new in wrapper.

#1   AP reports client at -73
#2   AP reports client at -74
#3   AP reports client at -74
#4   AP reports client at -75
#5   AP reports client at -73

Less spread on the mmcx pigtails. The best mmcx pigtail seems to about as good as an average u-fl pigtail. However, this could be an artifact of the SR5 cards mmcx port.

Draw your own conclusions, but I will no longer trust u.fl pigtails out of the box. Careful sorting of new u.fl pigtails could improve signal quality by 3-4db. At a client end this might not be worth it. At the AP, IMHO, it is well worth the time and effort.






--
Blair Davis

AOL IM Screen Name --  Theory240

West Michigan Wireless ISP
269-686-8648

A division of:
Camp Communication Services, INC

--
WISPA Wireless List: wireless@wispa.org

Subscribe/Unsubscribe:
http://lists.wispa.org/mailman/listinfo/wireless

Archives: http://lists.wispa.org/pipermail/wireless/

--
WISPA Wireless List: wireless@wispa.org

Subscribe/Unsubscribe:
http://lists.wispa.org/mailman/listinfo/wireless

Archives: http://lists.wispa.org/pipermail/wireless/

Reply via email to