Lectrosonics R400 - Manual (Page 3)

Portable Wireless Sound System
The Lectrosonics Digital Hybrid Wireless TM (US Patent Pending) uses innovative technology to combine the
new advantages of digital audio with the classic advantages of analog RF transmission, thus delivering the
superior sound quality of a digital system and the excellent range of an analog system. A proprietary algorithm
encodes the digital audio information into an analog format which can be transmitted in a robust manner over
an analog FM wireless link. The receiver employs the latest filters, RF amplifiers, mixers and detector to
capture the encoded signal and a DSP (Digital Signal Processor) recovers the original digital audio.
This digital/analog hybrid technique has some very beneficial properties. Because the information being
transmitted is digitally encoded, immunity to noise is much higher than a compandor can offer. Because the
encoded audio is sent in analog format, spectral and power efficiency and operating range are not compro­
mised. Unlike traditional analog compandor systems, no artifacts are introduced under strong RF conditions.
Under weak RF conditions, the received signal degrades gracefully, like an analog system, delivering as much
usable audio as possible at maximum range. Since the audio is free of compandor artifacts, pumping and
breathing problems are also greatly reduced.
TABLE OF CONTENTS
GENERAL TECHNICAL DESCRIPTION ...................................................................................................... 4
INTRODUCTION ............................................................................................................................................................ 4
DIVERSITY RECEPTION .............................................................................................................................................. 4
RF FRONT-END AND MIXER ........................................................................................................................................ 4
FREQUENCY TUNING GROUPS ................................................................................................................................. 4
MICROPROCESSOR, PLL AND VCO CIRCUITS ........................................................................................................ 4
IF AMPLIFIERS AND SAW FILTERS ............................................................................................................................. 5
DIGITAL PULSE COUNTING DETECTOR .................................................................................................................... 5
DIGITAL SIGNAL PROCESSOR .................................................................................................................................... 5
COMPATIBILITY MODES ............................................................................................................................................... 5
DSP-BASED PILOT TONE ............................................................................................................................................. 5
SMART SQUELCH™ ..................................................................................................................................................... 5
SMART NOISE REDUCTION (SmartNR™) .................................................................................................................. 5
LCD SCREEN ................................................................................................................................................................ 6
POWER SUPPLY ........................................................................................................................................................... 6
FRONT PANEL CONTROLS AND FUNCTIONS ......................................................................................... 7
LCD SCREEN ................................................................................................................................................................ 7
POWER/PREV MENU BUTTON .................................................................................................................................... 7
REAR PANEL FEATURES ............................................................................................................................ 7
BAL AUDIO OUTPUT JACK .......................................................................................................................................... 7
PUSH FOR MENU/ROTATE TO SELECT CONTROL ................................................................................................... 7
POWER INPUT JACK .................................................................................................................................................... 7
MAIN ANT and DIV ANT ................................................................................................................................................ 7
R400 MENU SELECTIONS ........................................................................................................................... 8
MENU FUNCTIONS ....................................................................................................................................................... 9
SetUpRx .................................................................................................................................................................... 9
Freq ........................................................................................................................................................................ 9
Level ....................................................................................................................................................................... 9
Tuning ..................................................................................................................................................................... 9
Compat ................................................................................................................................................................... 9
Tone ........................................................................................................................................................................ 9
PilotBP .................................................................................................................................................................... 9
Phase ..................................................................................................................................................................... 9
TxBatt ................................................................................................................................................................... 10
SmartNR ............................................................................................................................................................... 10
BACK .................................................................................................................................................................... 10
LockSet .................................................................................................................................................................... 10
SmrtTun (Firmware version 1.5 and later) ............................................................................................................... 10
Scan ......................................................................................................................................................................... 10
ANTENNA USE AND PLACEMENT ........................................................................................................... 12
INSTALLATION AND OPERATING INSTRUCTIONS ............................................................................... 13
PROGRAMMING USER GROUPS .............................................................................................................................. 13
ADDING USER GROUP FREQUENCIES .............................................................................................................. 14
ERASING USER GROUP FREQUENCIES ............................................................................................................ 14
R400 REPLACEMENT PARTS AND ACCESSORIES .............................................................................. 15
Compatible Frequency Chart ........................................................................................................................................ 16
Frequency Coordination ............................................................................................................................ 16
Rule No. 1 ................................................................................................................................................................ 16
Rule No. 2 ................................................................................................................................................................ 18
Rule No. 3 ................................................................................................................................................................ 18
Using the Scan Function .............................................................................................................................................. 18
Call Lectrosonics .......................................................................................................................................................... 18
TROUBLESHOOTING ................................................................................................................................. 19
SPECIFICATIONS AND FEATURES .......................................................................................................... 21
SERVICE AND REPAIR ............................................................................................................................... 22
RETURNING UNITS FOR REPAIR ............................................................................................................. 22
LIMITED ONE YEAR WARRANTY .............................................................................................................. 24
Rio Rancho, NM – USA
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