[opendtv] Re: F-Type Connectors Now used past 2GHz What Standard?
- From: ShLampen@xxxxxxx
- To: opendtv@xxxxxxxxxxxxx
- Date: Sun, 13 Feb 2005 20:44:27 EST
In a message dated 02/13/2005 4:51:28 AM Pacific Standard Time,
colinrwright@xxxxxxxxxxxxx writes:
1. All F-Type male connectors shall use cable with an inner solid core
conductor or have an integral inner pin, the diameter of which is not less
than 0.85mm and not more than 1.15 mm.
2. The characteristic impedance of these connectors be 75 ohms (plus minus
?) and that the return loss of a mated pair be better than 20dB over the VHF
and UHF bands and better than 14dB in the range 950MHz to 2150MHz.
3. The contact reliability of a F-type male-female connection shall not
exceed 20 milliohms as measured by the total series resistance of the inner
and outer.
Here's what I (personally) would say...
1. All F-Type male connectors for use on RG-11 beyond 1 GHz and up to 3 GHz
shall use cable with an inner solid core conductor.
2. The characteristic impedance of these connectors shall be 75 ohms and the
return loss of a mated pair be better than 20dB over the range from 5 MHz to 3
GHz. This translates to an impedance variation of +/- 13 ohms if my
logarithm button is correct. That should be easy to meet, don't you think?
(3. The contact reliability of a F-type male-female connection shall not
exceed 20 milliohms as measured by the total series resistance of the inner
and outer.) Beyond my expertise to comment upon.
Where are the specs for these written? Is there a committee within SCTE that
does connectors?
Would love to learn more about the process!!!!
Steve Lampen
Belden Cable
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