User's Manual
Watertight Transmitter
Rio Rancho, NM
3
Table of Contents
Introduction ............................................................................................................................................................................................. 2
General Technical Description ..............................................................................................................................................................4
Servo Bias Input....................................................................................................................................................................................4
No Pre-Emphasis/De-Emphasis ...........................................................................................................................................................4
Low Frequency Roll-Off ........................................................................................................................................................................4
Input Limiter ..........................................................................................................................................................................................4
Signal Encoding and Pilot Tone ............................................................................................................................................................5
Microprocessor Control ......................................................................................................................................................................... 5
Compatibility Modes ..............................................................................................................................................................................5
Control Panel ........................................................................................................................................................................................5
Wide-Band Deviation ............................................................................................................................................................................5
Variable Power Output ..........................................................................................................................................................................5
Battery Operation .................................................................................................................................................................................. 5
Output Isolator ......................................................................................................................................................................................5
Controls and Functions .........................................................................................................................................................................6
LCD Screen ..........................................................................................................................................................................................6
Power LED ............................................................................................................................................................................................6
Audio Input Jack ....................................................................................................................................................................................6
Battery Compartment and Thumb Screw ..............................................................................................................................................6
Modulation LEDs ...................................................................................................................................................................................6
AUDIO Button .......................................................................................................................................................................................6
FREQ Button .........................................................................................................................................................................................6
Up/Down Arrows ...................................................................................................................................................................................6
Antenna .................................................................................................................................................................................................6
Battery Compartments ........................................................................................................................................................................... 7
About Batteries ....................................................................................................................................................................................... 7
Input Connector ...................................................................................................................................................................................... 7
Equivalent Input Circuit Diagram ..........................................................................................................................................................7
Operating Instructions ...........................................................................................................................................................................8
Power Up and Boot Sequence ..............................................................................................................................................................8
Power Down ..........................................................................................................................................................................................8
Standby Mode .......................................................................................................................................................................................8
Menus and Settings ................................................................................................................................................................................9
UP Arrow Settings ..................................................................................................................................................................................9
Compatibility Mode ...............................................................................................................................................................................9
Input Type ..............................................................................................................................................................................................9
RF Power Output ..................................................................................................................................................................................9
LCD Backlight .......................................................................................................................................................................................9
Frequency Step Size ........................................................................................................................................................................... 10
DOWN Arrow Settings ..........................................................................................................................................................................10
Remote Control ................................................................................................................................................................................... 10
Auto Power Restore ............................................................................................................................................................................10
Audio Mute .......................................................................................................................................................................................... 11
FREQ Button Settings .......................................................................................................................................................................... 12
AUDIO Button Settings ........................................................................................................................................................................12
Low Frequency Roll-off .......................................................................................................................................................................12
Input Gain ...........................................................................................................................................................................................12
LectroRM ...............................................................................................................................................................................................13
Troubleshooting ....................................................................................................................................................................................14
Accessories and Replacement Parts ..................................................................................................................................................16
Straight Whip Antennas .......................................................................................................................................................................17
Preventing Corrosion ........................................................................................................................................................................... 18
Desiccant Battery Caps .......................................................................................................................................................................18
Battery Door Update.............................................................................................................................................................................18
Re-conditioning (drying out) the caps and desiccant beads ...............................................................................................................19
Replacing the desiccant beads ...........................................................................................................................................................19
Speciļ¬cations ...................................................................................................................................................................................... 20
Service and Repair ...............................................................................................................................................................................22
Returning Units for Repair ..................................................................................................................................................................22