M
Michael A. Terrell
Guest
MooseFET wrote:
Idally, you should know something about the application. Using a TDR
with logging would make troubkleshooting much eaiser. If you can store
all the details of several hundred miles of coax in a self contained,
USB charged device the market is waiting.
There is 60 volt AC modified sinewave on a lot of CATV coax.
Like I said above, you need to know the market.
--
The movie 'Deliverance' isn't a documentary!
On Oct 5, 8:32 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:
John Larkin wrote:
Too much cheap surplus stuff on ebay, too. I'd love to do a cheapish
USB TDR, but there's probably no good market.
Target the CATV and telephone installer markets. Something they can
use with a laptop should sell
Ideally, it shouldn't need the laptop to do the check. It should
charge its self from the USB.
Idally, you should know something about the application. Using a TDR
with logging would make troubkleshooting much eaiser. If you can store
all the details of several hundred miles of coax in a self contained,
USB charged device the market is waiting.
It should have a "cable active" light on it.
There is enough POE systems to make a DC voltage measurement a good
idea.
There is 60 volt AC modified sinewave on a lot of CATV coax.
It should be defended against mains voltage on the wires. I say this
from sad experience with an RS-232 cable and a chassis that got hot
somehow.
Like I said above, you need to know the market.
What would be nice is a four channel TDR to test ethernet cabling.
That would show proper wiring pattern and cable condition. Four
differential outputs to test the twisted pairs, and a 4*2 input mux to
select each pair in turn. The ability to drive each pair separately
would allow testing for crosstalk, as well.
The ability to save or print the data on an installation would make it
a lot easier to troubleshoot, later on.
--
You can't have a sense of humor, if you have no sense!
--
The movie 'Deliverance' isn't a documentary!