Lectrosonics R1 User Manual

R1

UHF MULTI-FREQUENCY

BELT-PACK IFB RECEIVER

OPERATING INSTRUCTIONS

and trouble-shooting guide

LECTROSONICS, INC.

Rio Rancho, NM

SAFETY NOTES

Excessive sound levels can cause permanent hearing damage.

1. Always adjust the volume to the lowest level before listening to un­known
transmissions.

2. Use the lowest reasonable level consistent with hearing safety.

3. Don’t use high sound levels in the earphone to overcome high ambient
sound levels. That is absolutely foolish! Demand and use high isolation
earphones.

4. Don’t expose your ears to sound levels that cause them to ring. If your
ears do ring after exposure, think of it as a
to do that again.

OSHA (Occupational Safety Health Administration) guidelines on the

maximum allowable time exposure to sound pressure levels that will
cause hearing damage are as follows:

8 Hours at 90 dB SPL
4 Hours at 95 dB SPL
2 Hours at100 dB SPL
1 Hour at 105 dB SPL
30 Mins at110 dB SPL
15 Mins at115 dB SPL

warning bell telling you not

NEVER expose your ears to 120 dB SPL or higher! Damage will occur.

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INTRODUCTION

IFB Receiver

Thank you for selecting the Lectrosonics frequency agile, R1 IFB Receiver. The R1 is the
result of extensive engineering experience with the very latest components. The design
addresses the most demanding professional applications.

The Lectrosonics R1 Receiver along with the companion T1 transmitter allow on-air talent
to monitor program audio, and to receive cues from directors and other production person­nel.

The R1 Receiver is housed in a rugged, machined aluminum package for lasting perfor­mance in abusive environments

Only the R1 IFB Receiver is covered in this manual. The companion T1 transmitter is
covered in a separate manual. The R1 IFB Receiver will operate with any Lectrosonics T1
IFB Transmitter in the same frequency block.

TABLE OF CONTENTS

SAFETY NOTES .................................................................................................... 2

INTRODUCTION ..................................................................................................... 3

GENERAL TECHNICAL DESCRIPTION ............................................................... 4

RECEIVER OPERATING INSTRUCTIONS ........................................................... 6

BATTERY INSTRUCTIONS ................................................................................... 7

TROUBLESHOOTING ............................................................................................ 8

SPECIFICATIONS AND FEATURES .................................................................... 9

SERVICE AND REPAIR ....................................................................................... 10

RETURNING UNITS FOR REPAIR ..................................................................... 10

WARRANTY............................................................................................ Back cover

Rio Rancho, NM – USA

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GENERAL TECHNICAL DESCRIPTION

The IFB R1 Receiver is comprised of a number of functional subsystems as shown in Fig 1, Control Panel and Fig 2,
Receiver Block Diagram.

GENERAL FEATURES

The frequency agile IFB R1 FM Receiver is designed to operate with the Lectrosonics IFB T1 Transmitter and features
microprocessor control of 256 frequencies of operation within each frequency block. Each block covers 25.5 MHz with

0.1 MHz frequency spacing. Any one of ten different frequency blocks are factory available from 512 MHz to 805.5
MHz (except 608 to 614 MHz).

The receiver’s unique microcontroller design provides simple one knob and one LED operation for audio level, switch-
ing channels, and easy on-the-fly programming. A nonvolatile memory “remembers” all stored channels during power
OFF and returns operation to the last channel used when powered ON.

The IFB R1 Receiver uses 20 kHz FM deviation for efficient use of the bandwidth and a single band compandor for
clean quiet audio.

The Pilot Tone squelch locks the reception to the mating IFB T1 Transmitter and ignores other signals.

The receiver operates on one 9 Volt alkaline battery for up to 8 hours and features a blinking LED low battery indicator.
The voltages are internally regulated for stability.

The receiver is housed in a compact, rugged, lightweight aluminum enclosure. The unit features a durable removable
belt clip and an integral swing-aside battery compartment door.

CONTROL KNOB (fig. 1)
The single front panel control knob performs multiple functions;

1. Rotate for Power ON/OFF 3. Push quick, Channel Switching

2. Rotate for Audio Level 4. Push and rotate for Scan and Channel programming,

SCAN

(PUSH)

OFF MAX

AUDIO
LEVEL

LECTRO

IFB RECEIVER

R1

Figure 1 - R1 Control Panel

Refer to the RECEIVER OPERATING INSTRUCTIONS for full details on how to use the single knob control for channel
selection, scanning, and programming of the five memory locations.

LED INDICATOR (fig. 1)
The LED indicator on the front panel also indicates multiple functions.

CHANNEL NUMBER - The LED will blink OFF a number of times corresponding to the Channel Number when the unit
is switched ON and also when a new frequency is added to an open channel. For example, for channel 3 the LED
would blink OFF three times. After blinking the channel number the LED will return to a steady ON indicating normal
operation.

BATTERY STATUS - During normal operation a steady ON LED indicates a good battery. When the battery is nearly
exhausted the LED will repetitively blink one long and two short blinks. Continued use will further deplete the battery
causing the unit to automatically turn itself OFF until a fresh battery is installed.

PROGRAMMING FUNCTIONS - In the programming mode, the LED will blink at a fast rate to indicate scanning for an
active frequency. It also flashes briefly to indicate a frequency has been programmed into a channel.

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