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LECTROSONICS  |  SKU: 21909

IFBT4 UHF (BLOCK 470: 470.100 - 495.600 MHz)

IFB/IEM Transmitters

Synthesized UHF IFB Transmitter

$2,195.00 CAD
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Description

The IFBT4 can be used as a stand-alone device or patched directly into popular intercom systems.

Lectrosonics Digital Hybrid Wireless™ systems overcome channel noise in a dramatically new way, digitally encoding the audio in the transmitter and decoding it in the receiver, yet still sending the encoded information via an analog FM wireless link. This proprietary algorithm is not a digital implementation of an analog compandor but a technique that can be accomplished only in the digital domain, even though the inputs and outputs are analog.

Because it uses an analog FM link, Digital Hybrid Wireless™ enjoys all the benefits of conventional FM wireless systems, such as excellent range, efficient use of RF spectrum, and resistance to interference. However, unlike conventional FM systems, it does away with the analog compandor and its artifacts.

Microprocessor control provides user-friendly operation and eliminates transients at turn-on and turn-off. The transmitter output is muted in the TUNE mode to avoid generating interference in other wireless systems while scrolling up and down to change frequencies.

Features

Digital Hybrid Wireless™ technology

256 UHF frequencies in 100kHz steps

Microprocessor controlled operation

250 mW power output for long range use

Pilot tone squelch control

Multi-use XLR input jack

Built-in microphone preamp

DIP switch programmable intercom input

Tx mute for frequency scrolling

Multi-function LCD display

Compact size for use anywhere

Rugged machined aluminum construction

Specifications

Operating Frequencies

Block 470: 470.100 - 495.600

Block 19: 486.400 - 511.900

Block 20: 512.000 - 537.500

Block 21: 537.600 - 563.100

Block 22: 563.200 - 588.700

Block 23: 588.800 - 607.900, 614.100 - 614.300

Block 24: 614.400 - 639.900

Block 25: 614.400 - 639.900

Block 26: 665.600 - 691.100

Block 27: 691.200 - 716.700*

Block 28: 716.800 - 742.300*

Block 29: 742.400 - 767.900*

Block 944: 944.100 - 951.900

*export only

Frequencies (Channels per block):

256

Channel Spacing:

100 kHz (0.1 MHz)

RF Power Output:

250 mW

Spurious & Harmonic Suppression:

37 dBc above 1 GHz

Frequency Stability:

±.001% (10 ppm) @ 25 C

Temperature Stability:

±.001% (10 ppm) from -30 C to +50 C

Channel Selection:

Momentary pushbutton switches, TUNE Up and Down

Compatibility Modes (6)

Digital Hybrid Wireless(tm) (400 Series)

100 Series

200 Series

Mode 3

Mode 6

and IFB

Pilot Tone:

29.997 kHz IFB & 100 MODE, 32.765kHz 200 MODE, 400 MODE step selected

Modulation:

FM, ±20 kHz deviation IFB & 100 MODE, ±75kHz 200 & 400 MODE

Audio Frequency Response

100 Hz to 8 kHz, ±1 dB

IFB MODE system response (see Rolloff)

30Hz to 20kHz ±1dB

200 & 400 MODE system response (see Rolloff)

Rolloff: Low frequency audio rolloff is Menu selectable for 3 dB down at 35 Hz or 50 Hz

Signal to Noise Ratio:

90 dB typical ("A" weighted)

Audio Compressor:

2 to 1 IFB, 100, and 200 Mode

Output Impedance:

50 ohms

Audio Input Levels

0 dBu for Line, RTS1 & RTS2

-10 dBu for Clear Com

-42 dBu for mic dry inputs (no phantom power)

+/-50Vdc max

Audio Input Config:

Balanced and Unbalanced, rear panel selectable for Line, Mic. RTS 1, RTS 2, and Clear Comm

Audio Input Impedance:

Greater than 2 K balanced, greater than 1 K unbalanced at any gain setting

Gain Control Range:

-18 dB to +24 dB (0 dB nominal center), Menu selectable

Audio Input Jack:

Standard XLR female connector

Input Power:

12 to 14 VDC typical, 200 ma. max.; Max. Input Range 6 to 18 VDC

Power Input Jack:

Coax type, locking LZR RL26AE

Indicators:

Backlit Liquid Crystal Display. Displays modulation meter, frequencies, modes, rolloff, audio level, and tuning groups.

Front panel controls

MENU momentary pushbutton switch

Power OFF-TUNE-XMIT, 3 position slide switch

Select Up momentary pushbutton switch

Select down momentary pushbutton switch

Rear panel controls:

Input Mode Select, 4 section DIP switch

Weight:

9 ozs.

Size:

5.25" L (including connectors) x 3.25" W x 1.25" H

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