The TDR Time Domain Reflectometer 5262017 The TDR
- Slides: 31
The TDR Time Domain Reflectometer 5/26/2017 The TDR V 5 1
by Charles Hallock AA 3 WS 4/30/2013 The TDR V 4 2
Fish Can’t Read 4/30/2013 The TDR V 4 3
CONTENTS • Time Domain Reflectometers – Tektronix 1502 TDR Cable Tester – 4 SQRP Club HF Test Set – Make Your Own • ARES Work Done With The TDR – Hospitals and PG EOC Evaluated – Lessons Learned 4/30/2013 The TDR V 4 4
Time Domain Reflectometers Tektronix 1502 TDR Cable Tester 4 SQRP Club HF Test Set Make Your Own 4/30/2013 The TDR V 4 5
Tektronix 1502 TDR Cable Tester • Measure the Length of a Cable • Demonstrate Shorts and Opens • Show Humps and Bumps 4/30/2013 The TDR V 4 6
Measure the Length of a Cable ZERO 4/30/2013 The TDR V 4 7
Measure the Length of a Cable ROTATE to the ZERO Line ROTATE 4/30/2013 The TDR V 4 8
Demonstrate Shorts and Opens OPEN 4/30/2013 SHORT The TDR V 4 9
Show Humps and Bumps Six Foot Cable B&C Connector and Barrel Connector 4/30/2013 The TDR V 4 10
4 SQRP Club HF Test Set 4/30/2013 The TDR V 4 11
4 SQRP Club HF Test Set Copied with permission of the 4 SQRP Club 4/30/2013 The TDR V 4 12
4 SQRP Club HF Test Set • Measure the Length of a Cable • Demonstrate Shorts and Opens 4/30/2013 The TDR V 4 13
Measure the Length of a Cable ~540 n. Sec 4/30/2013 The TDR V 4 14
Measure the Length of a Cable The 4 States QRP Group HF Test Set Construction Manual Pages 28 and 30 Copied with permission of the 4 SQRP Club 4/30/2013 The TDR V 4 15
Measure the Length of a Cable ~540 n. Sec 4/30/2013 The TDR V 4 16
Demonstrate Shorts and Opens OPEN 4/30/2013 SHORT The TDR V 4 17
Demonstrate Shorts and Opens The 4 States QRP Group HF Test Set Construction Manual Pages 28 and 30 Copied with permission of the 4 SQRP Club 4/30/2013 The TDR V 4 18
Make Your Own Copied with permission of the 4 SQRP Club 4/30/2013 The TDR V 4 19
SCHEMATIC Copied with permission of the 4 SQRP Club 4/30/2013 The TDR V 4 20
PARTS LIST Copied with permission of the 4 SQRP Club 4/30/2013 The TDR V 4 21
TDR CIRCUIT BOARD LAYOUT 4/30/2013 The TDR V 4 22
PROTOTYPE CIRCUIT BOARD 33333333333 33333333333 4/30/2013 The TDR V 4 23
ARES Work Done With The TDR • • • Fort Washington Hospital Laurel Hospital PG County EOC Med. Star Southern Maryland Hospital Lessons Learned 5/26/2017 The TDR V 5 24
Fort Washington 4/30/2013 The TDR V 4 25
Laurel Hospital 4/30/2013 The TDR V 4 26
Laurel Hospital 4/30/2013 The TDR V 4 27
PG County EOC Water in the Coax 4/30/2013 The TDR V 4 28
Lessons Learned • Shorted lighting arrestors may not be seen with a Antenna Analyzer. • Shorted cables near the antenna may pass RF at a reduced level with a DC short indication. • Shorted cables near the antenna end may show higher than normal SWR at VHF and UHF frequencies. • Water in the coax makes strange humps and bumps in TDR scope (Condition discovered by NX 3 SS at the EOC). 4/30/2013 The TDR V 4 29
The TDR Questions? 4/30/2013 The TDR V 4 30
RF Can’t Read bye 4/30/2013 The TDR V 4 31
- What is time domain and frequency domain
- Low cost tdr
- Tdr baseline
- Tdr studio
- Tdc cardiologie
- Maladie de bouceret
- Tdr status
- Precision paper
- Tdr calculation
- Handheld tdr
- Tdr status
- Domain codomain range
- Z domain to frequency domain
- What is the z - transform of anu[n] and -anu[-n-1]
- Z domain to frequency domain
- Domain specific vs domain general
- Domain specific software engineering
- Problem domain vs knowledge domain
- S domain to z domain
- Specification gap is gap between
- Start time end time and elapsed time
- Time domain reflectometry tutorial
- Summing junction
- Time domain function
- Time domain analysis of control system
- Circular convolution theorem
- Time domain astrophysics
- Time domain astronomy
- Time domain astronomy
- Time domain astronomy
- Steady state error in control system
- High pass and low pass filters