Breaking News
Comments
Newest First | Oldest First | Threaded View
Page 1 / 2   >   >>
David Ashton
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
David Ashton   1/29/2011 10:38:33 PM
NO RATINGS
Nice story. I kinda wish I'd worked in those days myself. Things were simpler, and engineers had more respect I think. Though finding a break in a transatlantic cable, armed only with an ohm-meter, probably was not that simple.

SkipF
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
SkipF   1/27/2011 1:12:06 AM
NO RATINGS
What about these guys who fixed a broken cable without a TDR...? http://blog.modernmechanix.com/2008/01/30/splicing-a-cable-in-mid-atlantic/

warnnyjames
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
warnnyjames   1/25/2011 11:55:24 AM
NO RATINGS
Great work as write in my language, I couldn't find better source like this, but i found it. I am a huge faithful regarding commenting on blogs to help the blog writers know that them http://www.cellhub.com/t-mobile-cell-phones/motorola-defy-black.html Motorola DEFY

gayatrikumar_1
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
gayatrikumar_1   1/25/2011 4:18:46 AM
NO RATINGS
Good Work !

richardst
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
richardst   1/21/2011 10:03:04 AM
NO RATINGS
Oops! You are quite right, JerrySC. I should have read more carefully.

Jerrysc
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
Jerrysc   1/21/2011 2:14:25 AM
NO RATINGS
Out FOR calibration is different than out OF calibration. The former means none available. With all the emphasis on doing everything from a computer, I wondered if engineers were still being educated in basic measurements.

Betterthanalemur
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
Betterthanalemur   1/20/2011 6:34:39 PM
NO RATINGS
I have to ask, did you have some fancy tdr that just doesn't turn on when it is out of cal?

Jonathan Allen
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
Jonathan Allen   1/20/2011 1:42:45 PM
NO RATINGS
Using the same theory as Richardst, a couple of years ago I faced a short an unknown distance along about 50 ft. of co-ax. I connected a small 3-turn coil across the feed end and used a grid-dip meter to find the resonant frequency. From this I predicted the location of the short and that's where it was. All with just one active device (a triode).

richardst
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
richardst   1/20/2011 11:07:37 AM
NO RATINGS
The TDR was out of calibration? Bung it onto the 1000 ft cable and check it. While a square wave or a pulse is easier, you should also be be able to do this with a sin signal generator. An open looks like a short at lambda/4 + n lambda/2. A short looks like a short at n lambda/2. Lambda = velocity-of-propagation (Vp) / frequency. For coax, take Vp as 2e8 m/s as a first try.

smitjs
User Rank
Author
re: It's cold. It's dark. And the TDR you need is missing.
smitjs   1/20/2011 5:32:48 AM
NO RATINGS
Maar natuurlik David Johan Smit

Page 1 / 2   >   >>


Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Most Recent Comments
David Ashton
 
resistion
 
resistion
 
Bill_Jaffa
 
David Ashton
 
David Ashton
 
Aries1470
 
realjjj
 
junko.yoshida
Like Us on Facebook
Special Video Section
Protecting sensitive electronic circuitry from voltage ...
09:45
Watch as a web server authenticates or rejects a water ...
Protecting sensitive electronic circuitry from voltage ...
Watch as a web server authenticates or rejects a water ...
Protecting sensitive electronic circuitry from voltage ...
Power can be a gating factor in success or failure of ...
Get to market faster and connect your next product to the ...
00:44
See how microQSFP is setting a new standard for tomorrow’s ...
The LTC3649 step-down regulator combines key features of a ...
Once the base layer of a design has been taped out, making ...
In this short video we show an LED light demo to ...
The LTC2380-24 is a versatile 24-bit SAR ADC that combines ...
In this short video we show an LED light demo to ...
02:46
Wireless Power enables applications where it is difficult ...
07:41
LEDs are being used in current luxury model automotive ...
With design sizes expected to increase by 5X through 2020, ...
01:48
Linear Technology’s LT8330 and LT8331, two Low Quiescent ...
The quality and reliability of Mill-Max's two-piece ...
LED lighting is an important feature in today’s and future ...
05:27