HF-SSB COMMUNICATIONS - sgcworld.com

1 HF-SSB COMMUNICATIONS : THE POWER TO LOCK IN THE WORLD. Globally, HF-SSB has literally changed the world. For a minimal investment, it has allowed millions of people - often in amazingly remote settings, often in emergency conditions - to reliably bounce clear voice and data signals across a state, across a continent, over an ocean, or around the world. Without satellites, relay stations, cellular nets, stadium sized antennas or huge user fees. Just some fine equipment, a smart operator and nature's own ionosphere make this possible. For nearly 25 years, the perfection of HF SSB has been the focus and the life of our company.

2 Our efforts have not gone unnoticed. Today, SGC is a prominent choice of leading corporations, governments, relief agencies, paramilitary organizations, mariners, aviators, explorers, and scientists - all over the world. They trust our engineering and they value our experience. A vital part of our company's strategy centers around new product development, with an emphasis on providing quality equipment which remains rugged, reliable and competitively priced. We are focused on providing customer service of the highest standard. Our commitment is to product training and comprehensive after sales support.

3 Today, SGC is recognized as a world class designer and manufacturer of HF SSB COMMUNICATIONS products. At SGC we build COMMUNICATIONS power tools. Next generation HF-SSB radios, antennas, amplifiers and coupler systems that squeeze more range and clarity out of every watt of HF SSB COMMUNICATIONS power, are the technology and innovations that have helped SGC emerge as a cutting edge player in the expanding world of HF-SSB . Actually, SGC was the first company to perfect and mass produce solid-state HF SSB radios, more than 20 years ago. Today, our focus is an ever higher level of HF SSB refinement and performance.

4 All focused on creating HF SSB voice and data COMMUNICATIONS systems that are so user friendly and so powerful, they allow every SGC user to easily lock in the world. SGC - HF SSB Power Tools! Pierre B. Goral, President The SGC Building, 13737 26th St. Bellevue, Washington 98005 USA. 1997 SGC Inc. Box 3526, 98009 Tel: (425) 746-6310 Fax: (425) 746-6384. CONTENTS. CHAPTER 1. USERS OF LONG-RANGE RADIO EQUIPMENT. HF SSB HIGH FREQUENCY SINGLE SIDEBAND ..7. WHAT IS SSB? ..8. SSB'S HIGH EFFICIENCY ..9. HF SIGNAL CHARACTERISTICS ..10. PROPAGATION ..12. NATURAL CYCLES THAT AFFECT PROPAGATION.

5 12. HF SIGNAL PATHS ..15. OPERATING NECESSITIES ..16. INFORMATION OPERATING MORSE CW (CONTINUOUS WAVE) ..19. VOICE ..19. AM (AMPLITUDE MODULATION) ..19. SSB (SINGLE SIDEBAND) ..20. DATA ..20. VIDEO ..21. HF SSB vs. VHF/UHF RADIO communication SYSTEMS ..22. VHF/UHF COMMUNICATIONS ..22. REPEATERS REQUIRED ON VHF/UHF ..24. NO REPEATERS WITH HF SECURITY ..25. INSTALLATION ..26. COST ..27. CHAPTER 2. HF TRANSCEIVER SPECIFICATIONS AND HF TRANSCEIVER SPECIFICATIONS AND FEATURES ..30. TRANSMITTER/RECEIVER BANDS AND FREQUENCY POWER FREQUENCY STABILITY AND CRYSTAL 1. The SGC Building, 13737 26th St.

6 Bellevue, Washington 98005 USA 1997 SGC Inc. Box 3526, 98009 Tel: (425) 746-6310 Fax: (425) 746-6384. FREQUENCY STEP ..31. SENSITIVITY ..31. SELECTIVITY ..32. OPERATING TEMPERATURE RANGE ..32. POWER CURRENT DUTY CYCLE ..33. DISPLAY AND MEMORIES ..34. ALARM ..34. AUTO ALARM ..34. BREAK-IN KEYING (QSK) ..34. SIDETONE ..35. DSP (DIGITAL SIGNAL PROCESSING) ..35. DSP IN HF DSP SPEAKER/HEADPHONE/RECORD AUDIO I/O/ AGC (AUTOMATIC GAIN CONTROL)..38. NOISE FREQUENCY PTT (PUSH-TO-TALK TRANSMITTER)..38. VOX (VOICE ACTIVATED TRANSMITTER) ..39. SPEECH PROCESSING ..39. SIMPLEX/DUPLEX SQUELCH ..39. SPLIT-FREQUENCY SELECTABLE SIDEBANDS.

7 40. DATA COMPUTER REMOTE CONTROL ..41. ALE (AUTOMATIC LINK ESTABLISHMENT)..41. ENCRYPTIONS AND SCRAMBLING ..41. GENERAL-COVERAGE CHANNEL POWER AC (MAINS) POWER SUPPLIES ..44. TRANSFORMER-RECTIFIER POWER SUPPLIES ..44. MOBILE POWER SUPPLIES ..45. 2. The SGC Building, 13737 26th St. Bellevue, Washington 98005 USA. 1997 SGC Inc. Box 3526, 98009 Tel: (425) 746-6310 Fax: (425) 746-6384. SOLAR-POWERED CHARGERS ..46. HUMAN POWERED CHAPTER 3. HF ANTENNAS, FEEDLINES AND GROUNDS ..47. HF ANTENNAS, FEEDLINES & GROUNDS ..48. OPERATING BASE ..48. MOBILE ..48. FIELD ..49. AERONAUTICAL ..50. ANTENNA PATTERN BASICS.

8 50. ANTENNA CONSTRUCTION BASICS ..53. ANTENNA TYPES ..54. LONGWIRES AND RANDOM-LENGTH VEES AND RHOMBICS ..55. THE QUARTER WAVE VERTICAL ..56. THE VERTICAL THE WINDOM ANTENNA ..57. THE DIPOLE AND ITS BEAM AND YAGI LOG-PERIODIC ANTENNA ..58. LOOP BOXES AND DELTAS ..59. MOBILE ANTENNA VARIATIONS ..60. FEEDLINES ..61. GROUNDING SYSTEMS ..64. EQUIPMENT GROUNDS ..64. RF COUNTERPOISES AND GROUND BASE STATION FIELD-OPERATION MOBILE SAILBOAT AND POWERBOAT AIRCRAFT GROUNDS ..70. GROUND DAMAGE, AGEING AND CHAPTER 4. INSTALLATION ..71. INSTALLATION ..72. TRANSCEIVER ..72. RUNNING POWER CONNECTING AND CONNECTOR TYPES.

9 74. 3. The SGC Building, 13737 26th St. Bellevue, Washington 98005 USA 1997 SGC Inc. Box 3526, 98009 Tel: (425) 746-6310 Fax: (425) 746-6384. CONNECTING THE CONNECTING THE CONNECTING THE AUDIO I/O JACK ASSEMBLY ..74. CONNECTING THE REMOTE CONTROL ..75. COUPLER ..76. LOCATION ..76. CONNECTION TO POWER ..76. CONNECTION TO RF GROUND ..77. CONNECTION TO CONNECTION TO THE COUPLER IN A HARSH ANTENNA ..79. LOCATION ..80. FEEDLINES ..81. FEEDTHROUGH CONNECTORS OR FEEDLINE ROUTING ..81. HARSH ENVIRONMENTS ..82. NOISE AND NATURAL MAN-MADE NOISE REMEDIES AT THE TRANSCEIVER ..84. DIGITAL SIGNAL PROCESSING (DSP).

10 84. NOISE MAGNETIC ANTENNAS ..84. CHANGE OF NOISE REMEDIES AT THE NOISE SOURCE ..85. ISOLATION AND BY-PASSING ..85. BONDING ..86. STATIC SHIELDING ..87. GROUNDING ..87. MOVING THE ANTENNA ..87. POWER CONCEPTS ..88. FORWARD REFLECTED POWER ..89. STANDING VSWR ..89. FIELD STRENGTH ..89. GAINS AND DO-IT-YOURSELF LIGHT-BULB DUMMY RADIO TEST COUPLER TEST PROCEDURE ..93. WATTMETER ..93. SWR METER ..93. FIELD STRENGTH 4. The SGC Building, 13737 26th St. Bellevue, Washington 98005 USA. 1997 SGC Inc. Box 3526, 98009 Tel: (425) 746-6310 Fax: (425) 746-6384. FREQUENCY IMPEDANCE BRIDGE ..94. S-METER.