About SuperDF:

Training Course for the SuperDF

Your time is especially valuable when your radio communications system is down because of interference, and you are trying to locate the source of that interference. BMG Engineering, Inc. has prepared a special training course for use with the SuperDF Radio Direction Finder (RDF). It will help you locate the interference quicker and safer. (The paper-only version is designated as Model # T1 on our order blank.)

To save you time while studying, the T3 course contains the same material presented in two parallel forms. One is audio tape, and the other is the paper copy. You can switch back and forth between the two versions without loosing the thread of the course. You can listen to the tapes while you are driving, and switch to the printed version at other times. If there are diagrams which are needed to get a point across, the tape version will call this to your attention, so you can look at the indicated figures later. A verbal description of the figure is also presented. In this course you will first learn basic concepts, basic theory, and basic operation. You should also do the practice exercises discussed. After mastering the basics, some of those concepts are amplified, and more Real World is discussed. We include here the Table of Contents to indicate what the course covers. The paper version is 35 pages of 8-1/2 by 11, close typed. The audio tape is 90 minutes long.

TABLE OF CONTENTS

Introduction

• THE TEACHER, THE CORPORATION, AND THE COURSE
• WHAT IS THE SuperDF?
• APPLICATIONS FOR SuperDF

Specifications Summary

• RDF TYPE
• SIGNAL STRENGTHS
• POLARIZATION
• HUNTABLE SIGNALS

Basic Theory

• SWITCHED ANTENNA
• RECEIVER
• PROCESSING RECEIVER OUTPUT
• DISPLAYS
• MOUNTING AND ROTATING THE ANTENNA

Basic Operation

• OBTAINING BEARINGS
• MOBILE IN MOTION

Practice

• ON FOOT
• MOBILE

Mental Attitude

• MIND GAME
• TIME PRESSURE
• MONITOR FUNCTION

Basic Hunting Techniques

• PRE-HUNT PREPARATION
• USING SQUELCH
• HOMING IN
• TRIANGULATION

DFing Philosophies and Hints

• USE ALL INFORMATION
• SAFETY
• COLLECTING EVIDENCE

Advanced Concepts and Techniques

• "REFLECTIONS"
• MULTIPATH
• HIGH-RISE AREA HUNTING
• HUNTING INSIDE BUILDINGS
• SHORT DURATION SIGNALS
• HUNTING IN CANYONS
• WEAK SIGNALS
• POLARIZATION
• CROSSED POLARIZATION
• SuperDF PATTERN and ELEVATION ANGLE
• HANDHELD TECHNIQUE
• REFINING BEARINGS

Bad Guy Hunts

• SAFETY
• CAMOUFLAGE
• SPIRAL IN TECHNIQUE

Problems

• SIGNAL PROBLEMS
• ENVIRONMENT PROBLEMS
• RECEIVER PROBLEMS
• SuperDF PROBLEMS

Appendix A

Example of the analysis used on a real hunt in the mountains, with topographical map.

• Figure 1. Control Unit front panel.
• Figure 2. SuperDF polarization.
• Figure 3. SuperDF System Overview.
• Figure 4. System waveforms.
• Figure 5. Window plate mounting example, outside view.
• Figure 6. Window plate mounting example, inside view.
• Figure 7. Locating by Homing In.
• Figure 8. Locating by Triangulation.
• Figure 9. Multipath wave-front.
• Figure 10. Hi-Rise hunting.
• Figure 11. RF flow in a canyon.
• Figure 12. SuperDF pattern.
• Figure 13. Taking an elevation angle bearing.
• Figure 14. Handheld SuperDF.
• Figure 15. The Spiral-In hunting technique.
• Figure 16. Topographical map.

George Russ Andrews President

Contact

George R. Andrews (Russ, K6BMG)
BMG Engineering, Inc.
9935 Garibaldi Avenue
Temple City, CA
91780, USA

Voice 1(626)285-6963
Fax 1(626)285-1684 (24 hour automatic)
America OnLine: Grandrews
Web: http://members.aol.com/bmgenginc

(31 Jan 1996)

Send E-mail to grandrews@aol.com. (A message window will open.)
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