coax cable selection

G

Glenn Pavlovic

Guest
Hello all,
I'm playing around with wireless networking, and have something I
want to try. I have a Linksys WAP11 access point (operates at 2.4GHz)
that I want to remote mount the antennas for. So what I'm primarily
interested in is, does anyone know a site on the web where I can find
general information about selecting coax cable, with an eye toward
this specific application. I'ld like to understand the basics so I can
understand the why's behind a given choice.
I also happen to have a bunch of dual RG6 sat cable (we had the
installer give us a bunch when we got out sattellite TV system put
in), the labeling on it says it's for 2200MHz, which is pretty close
to 2.4GHz, so I'm thinking that it may work for this. I don't actually
need it where it is now. So what do you think?
I'm also looking for information on selecting connectors for high
frequency applications like this. My thought is to use the coax
connectors like you find on the back of a TV for some of the wiring.
But I know that the TV connector is for a 75 ohm connection and the
reverse polarity TNC connectors on the WAP11 seems to be for 50 ohm
connections, but I don't see how that would change the connector? As I
understand it (transmission line theory isn't one of my strong suits)
the 50 ohm vs. 75 ohm is the termination impedence and isn't in the
connector.
Thanks in advance for any advice.
Glenn Pavlovic
 
On 31 Dec 2003 18:04:08 -0800, Glenn Pavlovic <mountain352@netscape.net> wrote:
Hello all,
I'm playing around with wireless networking, and have something I
want to try. I have a Linksys WAP11 access point (operates at 2.4GHz)
that I want to remote mount the antennas for. So what I'm primarily
interested in is, does anyone know a site on the web where I can find
general information about selecting coax cable, with an eye toward
this specific application. I'ld like to understand the basics so I can
understand the why's behind a given choice.
I also happen to have a bunch of dual RG6 sat cable (we had the
installer give us a bunch when we got out sattellite TV system put
in), the labeling on it says it's for 2200MHz, which is pretty close
to 2.4GHz, so I'm thinking that it may work for this. I don't actually
need it where it is now. So what do you think?
I'm also looking for information on selecting connectors for high
frequency applications like this. My thought is to use the coax
connectors like you find on the back of a TV for some of the wiring.
But I know that the TV connector is for a 75 ohm connection and the
reverse polarity TNC connectors on the WAP11 seems to be for 50 ohm
connections, but I don't see how that would change the connector? As I
understand it (transmission line theory isn't one of my strong suits)
the 50 ohm vs. 75 ohm is the termination impedence and isn't in the
connector.
Thanks in advance for any advice.
Glenn Pavlovic
Coax cables have a characteristic impedance. RG6 is a 75ohm cable,
not suitable.



--
_______________________________________
John E. Todd <> jtodd@island.net

Note: Ensure correct polarity prior to connection.
 
"John Todd" <john@Neopha.44in88.net> wrote in message
news:slrnbv8h1n.lr.john@Neopha.44in88.net...
On 31 Dec 2003 18:04:08 -0800, Glenn Pavlovic <mountain352@netscape.net
wrote:
Hello all,
I'm playing around with wireless networking, and have something I
want to try. I have a Linksys WAP11 access point (operates at 2.4GHz)
that I want to remote mount the antennas for. So what I'm primarily
interested in is, does anyone know a site on the web where I can find
general information about selecting coax cable, with an eye toward
this specific application. I'ld like to understand the basics so I can
understand the why's behind a given choice.
I also happen to have a bunch of dual RG6 sat cable (we had the
installer give us a bunch when we got out sattellite TV system put
in), the labeling on it says it's for 2200MHz, which is pretty close
to 2.4GHz, so I'm thinking that it may work for this. I don't actually
need it where it is now. So what do you think?
I'm also looking for information on selecting connectors for high
frequency applications like this. My thought is to use the coax
connectors like you find on the back of a TV for some of the wiring.
But I know that the TV connector is for a 75 ohm connection and the
reverse polarity TNC connectors on the WAP11 seems to be for 50 ohm
connections, but I don't see how that would change the connector? As I
understand it (transmission line theory isn't one of my strong suits)
the 50 ohm vs. 75 ohm is the termination impedence and isn't in the
connector.
Thanks in advance for any advice.
Glenn Pavlovic

Coax cables have a characteristic impedance. RG6 is a 75ohm cable,
not suitable.
RG-58 is usually 50ohm, BNC connectors are common.

--
_______________________________________
John E. Todd <> jtodd@island.net

Note: Ensure correct polarity prior to connection.
 

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