Lectrosonics UDR195 User Manual
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Table of Contents
INTRODUCTION TO THE 195 SYSTEM ......................................... 4
MODULAR DESIGN ............................................................................................... 4
T195 TRANSMITTER ............................................................................................. 5
M195 TRANSMITTER ............................................................................................ 5
DUAL-BAND COMPANDOR .................................................................................. 5
75KHz DEVIATION ................................................................................................. 5
NO PRE-EMPHASIS/DE-EMPHASIS .................................................................... 5
EXCEPTIONAL THERMAL STABILITY ................................................................. 5
GENERAL TECHNICAL DESCRIPTION ......................................... 6
MODULAR UHF/VHF RF SECTION ...................................................................... 6
SIX-POLE HELICAL RESONATOR FRONT-END ................................................. 6
GaAs FET FRONT-END FILTER COUPLING ....................................................... 6
DOUBLE BALANCED DIODE MIXERS ................................................................. 6
8 POLE LINEAR PHASE FILTER ........................................................................... 6
DIGITAL PULSE COUNTING DETECTOR ............................................................ 7
RATIO COMBINING DIVERSITY WITH OPTI-BLEND .......................................... 7
2:1 EXPANDER (Dual–Band Compandor) ............................................................. 7
VARIABLE CUTOFF LOW PASS FILTER ............................................................. 7
PILOT TONE MUTE (SQUELCH) .......................................................................... 7
FRONT PANEL CONTROLS AND FUNCTIONS ............................ 8
AUDIO OUTPUT LEVEL ......................................................................................... 8
TRANSMITTER AUDIO LEVEL .............................................................................. 8
RF LEVEL INDICATORS ........................................................................................ 8
OPTI-BLEND LEDs ................................................................................................. 8
PILOT LED .............................................................................................................. 9
DIVERSITY MODE ................................................................................................. 9
MONITOR ............................................................................................................... 9
POWER ................................................................................................................... 9
REAR PANEL CONTROLS AND FUNCTIONS ............................. 10
VU METER HEADROOM ..................................................................................... 10
AUDIO OUTPUT ................................................................................................... 10
PHASE REV .......................................................................................................... 10
AC POWER SUPPLIES ........................................................................................ 10
EXTERNAL POWER JACK .................................................................................. 11
CONTACT CLOSURE .......................................................................................... 11
PILOT TONE BYPASS ......................................................................................... 11
ANTENNA JACKS ................................................................................................ 11
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