General Technical Description - Lectrosonics T5 Operating Instructions Manual

Multi-frequency ifb transmitter euro model

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Table Of Contents

Table of Contents

The T5 IFB Transmitter is comprised of a number of functional sub-systems as shown in the block diagram below.

GENERAL

The T5 is designed to operate with the Lectrosonics R5 IFB Receiver and features microprocessor control of 256

frequencies of operation within any one of at least thirteen frequency bands. (See page 10.)

The T5 uses 20kHz deviation for an efficient use of bandwidth. The transmitter circuits are all regulated for frequency

stability and high audio performance. The input amplifier is a discreet differential circuit which can be adjusted to

allow the use of many different input sources.

AUDIO INPUT

The input sensitivity and XLR pin functions can be customized using a clever dip switch circuit. Several different

combinations of gain and input hookup are possible without rewiring the mic connector. Pin 1 of the XLR input

connector is normally connected directly to ground but an internal jumper can be moved if a floating input is desired.

The Audio (+) and (–) are "dry" inputs and can each withstand +/- 50Vdc. Direct connection to a phone line can

damage the inputs.

AUDIO PROCESSOR

The Audio Processor section has several functions. Audio limiting is accomplished in the Shunt Limiter while the

Bandpass filter limits the audio bandwidth to 100Hz at the low end and 10kHz in the upper range. The single band

compandor circuit is one half of a system that requires a matching receiver to decode the signal and restore it to its

original dynamic range.

Memory

FREQ

Down

Audio Input Interface

XLR

Input

Connector

Switches

Input

Power

11-18 VDC

Polyfuse