SRc-941 Dual Receiver
LECTROSONICS, INC.
2
Digital Hybrid Wireless
®
The Lectrosonics Digital Hybrid Wireless
®
uses innova-
tive technology to combine the advantages of digital
audio with the advantages of analog RF transmission.
The result delivers the superior sound quality of a digital
system and the excellent range of an analog system.
A proprietary algorithm encodes the digital audio infor-
mation into an analog format which can be transmitted
in a robust manner over an analog FM wireless link. The
receiver employs state-of-the-art filters, RF amplifiers,
mixers and detector to capture the encoded signal and
a DSP 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 what a compandor can offer. Because
the encoded audio is sent in analog format, spectral
and power efficiency and operating range are not com-
promised.
Under weak RF conditions, the received signal de-
grades 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 .............................................. 3
IF Amplifiers and SAW Filters ............................................... 4
Digital Pulse Counting Detector ............................................ 4
DSP-Based Pilot Tone ........................................................... 4
SmartSquelch
™ ......................................................................................................................... 4
SmartDiversity
™ ........................................................................................................................ 4
Turn On and Turn Off Delays................................................. 4
Test Tone ............................................................................... 4
LCD Display .......................................................................... 5
Smart Noise Reduction (SmartNR
™
) .................................... 5
Front Panel Controls and Functions ..................................... 6
Audio Outputs ....................................................................... 6
LCD Screen .......................................................................... 6
MENU/SELECT Button ......................................................... 6
PWR/BACK Button ............................................................... 6
IR (Infrared) Sync ................................................................... 6
UP/DOWN Arrow Buttons ..................................................... 6
Rear Panel Adapters............................................................... 6
Camera Slot Adapter KIts ..................................................... 7
Adapters for Stand-Alone Use .............................................. 7
Installing Adapters ................................................................ 8
Installing Rear Panel Adapters.............................................. 8
Replacement Screw Kits ....................................................... 8
Battery Adapters ................................................................... 9
Installing the SRBATTSLED .................................................. 9
SR9VBP 9 Volt Battery Adapter .......................................... 10
SRSLEEVE mounting adapter ............................................ 10
SRHARDWARE mounting adapter kit ................................. 10
Audio Output Cables and Connectors ................................. 12
External Power Cables ........................................................ 12
Mounting and Orientation .................................................... 13
AMJ Rev. A Jointed Antenna ............................................... 13
PCA900 Printed Circuit Antenna ......................................... 14
LCD Main Window................................................................. 15
Navigating the LCD .............................................................. 16
Main Window ....................................................................... 17
Frequency Screen ............................................................... 17
Setup Screens .................................................................... 17
Locking and Unlocking the Front Panel Controls ................ 17
LCD Backlight Setup ........................................................... 17
Battery Timer Reset ............................................................ 17
Menu Item Descriptions ...................................................... 18
Front Panel Shortcuts ......................................................... 20
Scanning for Clear Frequencies ......................................... 21
Scan Window ...................................................................... 21
Zoom View Window ............................................................. 21
Frequency Coordination ...................................................... 22
Multi-channel Checkout ....................................................... 22
Specifications and Features ................................................ 23
FCC Notice ......................................................................... 23
Troubleshooting .................................................................... 24
Service and Repair ............................................................... 26
Returning Units for Repair .................................................. 26
Содержание SRc-941
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