Lectrosonics UDR195 User Manual download pdf (Page 2)

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

1 2 3 4 5 6 7 ... 17 18

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Lectrosonics UDR195 User Manual Page 2