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Re: Proper way to measure cable length

 

What I wanted to say here is:

A quarterwavelength at 500 kHz = 150m electrical.
A 1/4 wave physical cable with VF=0.78 would then be 150 x 0.78 = 117m long or with a VF of 0,66:? 150 x 0.66 = 99m
So sweeping from 500 kHz up will be sufficient for coax upto 100m long or so.
For longer cables one has to start with a lower frequency.

Arie


Op 12-2-2022 om 01:47 schreef Bob Ecclestone:

(** A quarter wavelength at 500 kHz is 600m / 4 = 150m and taking into
account the VF, the electrical length will be 150/0,78 = nearly 200m,
should be enough:-) ? )
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