Cable test mode.

[tuco....@gmail.com]

I have a 12 conductor 24 gauge control cable to my steppir antenna. One lead of a pair is open somewhere in 100 feet of the cable. Is Cable test mode able to measure a single twisted pair for the distance to the open?

If anyone has done this please enlighten me.

Thanks.

Neil

[David Bastress]

Neil, 

I should be possible IF you have some idea what the Vp (velocity of propagation) is for a  similar twisted pair.  OR, If you know what length of cable you have  (100 ft), you might get a pretty good estimate by measuring the length of another similar pair in the cable (with the SARK 110) and comparing the measured length ( with the SARK 11O ) of the broken pair to the measured length of the whole cable. 

(length of open pair / length of whole cable) X length of cable in ft =  should be the distance to the break from the measurement end.   It should be close!

Note: The distance to the stepper element connection should show up as an impedance bump but may not be as sharp as an open wire end.

GL

Dave K3GAU 

[Neil Rowe]

Thanks for the info. I will give it a try.  In cable test mode, it shows only coax, is there another setting i am missing ? Today messing around with the cable has caused the open to now close. I have a suspicion where the intermittent might be but will use the Sark when it opens again.

Regards

Neil

--
You received this message because you are subscribed to a topic in the Google Groups "sark110" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/sark110/IgQMy7Q1lak/unsubscribe.
To unsubscribe from this group and all its topics, send an email to sark110+u...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/sark110/1b02c6df-6f93-4186-94f3-8ba7e0d60657n%40googlegroups.com.

[David Bastress]

Neil,

In the 'SETUP' go to 'Cable Type.'   Scroll through the long list of cable types.  There are all kinds of cable types listed including UTP Category 3, 5E and 6 types.  One of them should be close.   But really you don't have to have the exact cable characteristics if you use the ratio method I suggested as long as the pair type is similar.

Dave

[Neil Rowe]

Thanks Dave, I appreciate your help.

Neil

To view this discussion on the web visit https://groups.google.com/d/msgid/sark110/8971d947-c4dd-4d79-bf64-e399e3e39a21n%40googlegroups.com.