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LDG AT-200Pro
Automatic Antenna Tuner
Introduction 4
Jumpstart, or “Real hams don’t read manuals!” 3
Specifications 4
An important word about power levels 4
Getting To Know Your AT-200Pro 5
Installation 7
Operation 8
Basic operation 8
Tuning 11
Auto and Semi-Auto Modes 12
Memory Tuning 12
Full Tuning Cycle (Long press) 12
Memory Tuning Cycle (Medium press) 13
Bypass mode (Short press) 13
Power and SWR Indication 14
Off Mode 14
Advanced Operation 14
Operation with an LDG radio interface: 15
Application Notes 17
Mobile operation 17
When to use Auto mode 17
When to use Peak mode 18
When to turn the LEDs off 18
RF Noise 18
MARS/CAP coverage 18
Error indications 18
Theory Of Operation 19
Some basic ideas about impedance 19
Transmitters, transmission lines, antennas and impedance 19
The LDG AT-200Pro 21
A word about tuning etiquette 22
Care and Maintenance 22
Technical Support 22
Warranty and Service 22
Firmware upgrades 22
Feedback 23
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