Lectrosonics D4 System User Manual download pdf (Page 3)

4-channel Digital Wireless System

Rio Rancho, NM, USA

Introduction

The D4 digital wireless system was designed as a

special purpose system for location production in ﬁlm

and television.

A typical application for this system is in television

production as part of what is commonly called a “bag

system.” A portable mixer and several wireless mi-

crophone receivers are carried in an over-shoulder

carrying case. The D4T transmitter is connected to the

outputs of the mixer to transmit up to four audio chan-

nels to one or more D4R receivers mounted on video

cameras.

The system is designed for line level analog audio

signals and AES/EBU digital audio signals with options

that provide:

 • Digitalin/Digitalout

 • Digitalin/Analogout

 • Analogin/Digitalout

 • Analogin/Analogout

The system can be conﬁgured to provide either 2 or

4 audio channels. In the 4-channel mode, four differ-

ent bands may be selected as shown below. Each

frequency carries four audio channels, digitally multi-

plexed on a common carrier. In the 2-channel mode,

eight different frequencies are available as shown

below, each with two audio channels.

Multiple D4 systems can be operated in the same

location to provide up to 16 audio channels.

The audio quality is suitable for any professional ap-

plication in ﬁlm, television and live sound. 48kHz/24-bit

audio, ruler-ﬂat 20Hz to 20kHz frequency response,

ultra-low distortion and high dynamic range assure

excellent audio quality.

Housings and panels are machined aluminum with

electrostatic powder coated and anodized ﬁnishes and

laser etched marking for durability.

Table of Contents

Introduction ............................................................................3

General Technical Description .............................................4

Front and Rear Panels ...........................................................6

Navigating the LCD ...............................................................7

Antenna Placement and Orientation .................................... 7

TransmitterGeneral Settings ................................................8

TransmitterAudio Trim Setup ................................................9

ReceiverGeneral Settings ...................................................10

ReceiverAudio Level Setup ................................................11

Transmitter AES3 Modes ....................................................12

Receiver AES3 Modes ......................................................... 12

Mixed Modes ........................................................................12

Connector Pinouts ..............................................................12

Frequency Selection ...........................................................13

Finding Clear Frequencies .................................................13

Parts and Accessories ........................................................14

Firmware Updates ...............................................................16

Speciﬁcations ......................................................................17

Service and Repair ..............................................................18

Returning Units for Repair .................................................18

Center frequencies of operation

907.776 912.384

916.992

923.904

906.624

911.232

908.928

913.536

915.840

918.144

922.752 925.056

902 to 928 MHz Band

2-CH

4-CH

1 2 3 4 5 6 7 8 ... 19 20

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