I can't 'directly' tell which is good or bad without testing....
As to what is wrong with them, I don't know. I do know that the ones I
tested and published to the list were all new units. They were opened
fresh for this test. I tested some other units as well, but I felt that
it made more sense to show the results from new, 'identical' pigtails....
I plan to buy sets of pigtails from other manufactures and continue to
test as I have time...
Tom DeReggi wrote:
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" <[email protected]>
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
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--
Blair Davis
AOL IM Screen Name -- Theory240
West Michigan Wireless ISP
269-686-8648
A division of:
Camp Communication Services, INC
--
WISPA Wireless List: [email protected]
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