LECTROSONICS IFBR1B, IFBR1B-941, IFBR1B-VHF Users manual
INSTRUCTION MANUAL
IFBR1B
UHF Multi-Frequency Belt-Pack IFB Receiver
IFBR1B, IFBR1B-941, IFBR1B-VHF
IFBR1B-VHF
IFBR1B-941
IFBR1B
NOTE: The IFBR1B does not ship standard
with the single battery charger. To order this
unit with a charger, order as IFBR1B-WITHCHARGER.
Fill in for your records:
Serial Number:
Purchase Date:
Rio Rancho, NM, USA
www.lectrosonics.com
IFBR1B, IFBR1B-941, IFBR1B-VHF
Table of Contents
Introduction ............................................................................3
General Technical Description .............................................3
Frequency Agility..................................................................3
Frequency Presets ...............................................................3
Simplicity ..............................................................................3
IFBR1B Features ....................................................................4
On/Off and Volume Knob .....................................................4
Battery Status LED ..............................................................4
RF Link LED .........................................................................4
USB Port ..............................................................................4
Installing the Battery .............................................................4
Battery Charging ...................................................................4
IFBR1B Functions ...............................................................5
Frequency Selection ............................................................5
Preset Selection ...................................................................5
Clear a Preset Selection ......................................................5
Firmware Update Instructions ..............................................6
Backlight Settings ................................................................6
LED On/Off ..........................................................................6
Locale Menu ........................................................................6
Locking the Settings .............................................................6
Specifications and Features .................................................7
Specifications .......................................................................7
Parts and Accessories ..........................................................8
Troubleshooting .....................................................................10
Service and Repair ................................................................11
Returning Units for Repair ...................................................1
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LECTROSONICS, INC.
IFB Receiver
Introduction
Wireless IFB (interruptible fold back) systems are used
for talent cueing and crew communications in broadcast
and motion picture production. In other cases, the IFB
system is used by directors and other management
to monitor program audio during a production. The
IFBR1B receiver provides simplicity and flexibility in a
package that is intuitive for untrained users to operate.
In spite of its tiny size, the new IFBR1B receiver offers
excellent performance on par with all of Lectrosonics’
IFB products.
The design uses +/-20 kHz FM deviation for efficient
use of the bandwidth, with compandor noise reduction circuitry for an excellent signal to noise ratio. A
supersonic Pilot Tone signal controls the audio output
squelch to keep the receiver silent when no transmitter signal is received. The incoming RF signal is filtered
and amplified, then mixed down to the IF frequency with
a microprocessor controlled synthesizer.
If a monaural earpiece is connected, this condition is
automatically accommodated, with no loss of audio output power or battery life. Full output power is available
with either type of connector, without the power losses
that result from a resistive circuit design. The headphone cable doubles as the receiving antenna.
The receiver will drive a wide variety of earbuds, headphones and induction neck loops at substantial levels,
with loads from 16 Ohms to 600 Ohms.
The IFBR1B operates on a single 3.6 V rechargeable
LB-50 Li-ion battery that will provide about eight hours
of operation per charge. The LED indicator changes
color from green to red as the battery voltage declines
to provide plenty of warning before operation ceases.
Inside the battery door is a USB port for firmware updates in the field.
The IFBR1B is housed in a rugged machined aluminum
package. A wire belt clip is included and provides a
secure mounting on a wide variety of belts, pockets and
fabrics.
General Technical
Description
Frequency Agility
The frequency agile IFBR1B Receiver is designed to
operate with the Lectrosonics IFB transmitters and
compatible Digital Hybrid transmitters. Microprocessor
control of frequencies within each frequency block provides the ability to work around interference problems
quickly and simply.
Frequency Presets
There are 10 presets available for programming in the
IFBR1B. The stored frequencies remain in memory during power OFF and even with the battery removed. Use
the UP and DOWN arrows to scroll through the previously selected frequencies stored in the IFBR1B and
quickly change frequencies for quick communication.
Simplicity
The unique design in this receiver is not only tiny, but
provides simple one knob operation for on/off and audio
level and easy on-the-fly programming with simple frequency adjustments and 10 preset slots available. Basic
operation is simply a matter of rotating the knob to turn
power on and adjust the volume level.
Rio Rancho, NM
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IFBR1B, IFBR1B-941, IFBR1B-VHF
IFBR1B Features
Headphone
output
LINK LED
On/Off and Volume Knob
Turns unit on or off and controls headphone audio level.
When the IFBR1B is first turned on, the firmware version will display briefly.
On/Off and
volume knob
Battery status
LED
Installing the Battery
USB port
An attached latching door makes battery installation easy.
The USB port is located in the battery compartment.
The battery door was designed to latch, providing extra
security. To open, press at the lower right corner as
shown.
Battery Status LED
When the battery status LED glows green, the batteries
are good. The color changes to red at a midpoint during
the runtime. When the LED begins to blink red, only a
few minutes remain.
The exact point at which the LED turns red will vary with
battery brand and condition, temperature and power
consumption. The LED is intended to simply catch your
attention, not to be an exact indicator of remaining time.
NOTE: The LCD will also alert when the battery is
critically low.
RF Link LED
When a valid RF signal from a transmitter is received,
this LED will light up blue.
Headphone Output
A 3.5 mm mini phone jack accommodates a standard
mono or stereo type 3.5 mm plug. The unit will drive
low or high impedance earphones. The jack is also the
receiver antenna input with the earphone cord acting as
the antenna. The cord length is not critical but must be
at least 6 inches minimum.
Slide the battery compartment door open, drop the
battery in so that the connectors match and slide the
battery door closed.
The battery door will now “lock” when fully closed. To
“unlock,” press down actuator and slide battery door
open.
Battery Charging
The receiver operates on a 3.6 V rechargeable battery that will provide about eight hours of operation per
charge.
CAUTION: Use only Lectrosonics LB-50
supplied battery (P/N 40106-1).
USB Port
Firmware updates via Wireless Designer are made
easy with the USB port in the battery compartment.
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LECTROSONICS, INC.
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