Lectrosonics D4 System Manual de usuario descargar pdf (Pagina 4)

D4T/D4R

LECTROSONICS, INC.

General Technical Description

D4T Transmitter

The transmitter can accept up to four inputs from digi-

tal or analog sources. The inputs can be conﬁgured as

follows:

• Fouranaloginputsusingallfourjacks

• Twodigitalinputsusingjack1andtwobalanced

analoginputsusingjacks3and4

• Fourdigitalchannelsusingjacks1and2

TheinputconnectorsareTA3“miniXLR”typeswith

thesamepinnumberingasstandardXLRconnectors

for AES/EBU and balanced line level analog signals.

Input preamp circuits use a special balanced ampliﬁer

withveryhighcommonmoderejectiontominimize

hum and noise.

Either analog or AES/EBU digital input signals are

converted to an internal 24-bit digital format which is

then encoded, organized into packets, and passed to

an RF modulator using spread spectrum techniques

and error correction for robust reception. The modu-

lated RF signal is ﬁltered before and after ampliﬁcation

to suppress out-of-band noise and spurious signals,

and a circulator/isolator guards against intermodulation

interference (IM).

A USB port is provided for ﬁrmware updates.

POWER

AMP

OSC

900 MHz

MOD

DIGITAL

BASEBAND

ENCODER

24-bit D/A

(analog)

AES/EBU

OUT

(digital)

24-bit D/A

(analog)

AES/EBU

OUT

(digital)

24-bit D/A

(analog)

24-bit D/A

(analog)

TA3M

INPUTS

CIRCULATOR

ISOLATOR

FILTER

1 2 3 4 5 6 7 8 9 ... 19 20

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