Re: My TDR Evaluation of the SG503 012-0482-00 Cable has been uploaded


 

Hi Tom,

Wikipedia is your friend when it comes to Velocity Factors. Scroll down this
web page
https://en.wikipedia.org/wiki/Coaxial_cable

Or in your web browser type "wikipedia coax" and it is usually the first hit
you get.

Wikipedia lists about 40 or 50 types of cable with all their parameters
including velocity factors.
It is my favorite, quickest way to find any information about different coax
cables.

Dennis Tillman W7PF

-----Original Message-----
From: Tom Gardner
Sent: Monday, April 29, 2019 1:03 AM
Subject: Re: [TekScopes] My TDR Evaluation of the SG503 012-0482-00
Cable has been uploaded

Very timely: this weekend I picked up a Tek 1502B, and it came with a
012-0482-00 cable and a 011-0123-00 BNC 50ohm terminator. Apart from
that I only have "generic" connectors and terminators, of variable
quality.

Caveat: I don't understand the expected performance of the 1502B, and
haven't calibrated it at all.

Having said that, the only significant difference from your report is
the velocity factor. In order for the 1502B to show the cable's length
as 3ft, I have to set the velocity factor to 0.67.

On 29/04/19 01:19, Dennis Tillman W7PF wrote:
I uploaded the results of my testing the SG503 012-0482-00 cable. In
addition I compared it to two other similar cables: a Tektronix
012-0057-00 50Ω cable, and a Pomona Electronics 50Ω cable.

It is located at:

https://groups.io/g/TekScopes/files/Evaluation%20of%20the%20Tektronix%
20012- 0482-00%20cable%20for%20the%20SG503.pdf

Dennis Tillman W7PF



--
Dennis Tillman W7PF
TekScopes Moderator

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