Aviation (TDR's explained - Time Domain Reflectometer)

Another video in my Aviation series. The TDR is a very useful tool for troubleshooting wiring issues. This tool can tell you what is wrong with a wire, and where the problem is down to the inch. A much need watch video for anyone who troubleshoots Aircraft, Computer Networks, Coax cables or automobiles.

Click below to fast forward:

0:40 What is a TDR?
1:05 How does a TDR work?
1:57 Test lead error
2:14 Dead zone errors
3:04 Velocity factor explained
4:34 Sampling a cable for velocity factor
5:14 Using TDR's when velocity factor is unknown
6:43 Impedance explained
10:17 Impedance scale on the TDR
10:50 Reading TDR traces
11:50 Proper test lead hookup
13:14 External factors that affect your TDR trace
14:31 Sample screen shots of TDR traces
15:17 Coax display after pinching the shield
17:00 Intermittent fault detection
17:19 TDR into an LRU
17:40 Noise on a TDR trace
18:00 Purchasing a TDR