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Lectrosonics IFBT4 - Frequency-Agile IFB Transmitter (Frequency Block 944)
The IFBT4 from Lectrosonics is a high-quality IFB transmitter designed for applications where long operating range and great audio quality are needed, such as broadcasting, film, and theater. The sleek, simple box can be used as a stand-alone unit, or patched into other widely-used intercom systems. The single XLR input connector is accompanied by four DIP-switches for selecting a mic, line, Clear Com, RTS1, or RTS2 audio source.
The Digital Hybrid Wireless technology allows the system to overcome channel noise by digital encoding and decoding audio in the transmitter and receiver, but sends the encoded signal over an analog FM signal. Due to the FM link being used, the system has all the benefits of traditional FM systems, including high range and resistance to interference, but thanks to the digital technology, the analog compander and artifacts are removed for greater audio quality.
The system is easy to use, featuring a menu-based, microprocessor-controlled system that is navigated with momentary buttons. The backlit LCD is bright and clear for easy reading. The casing is constructed from rugged aluminum to withstand the rigors of professional use, and it is small enough to use in any situation.
FCC Part 74 prohibits use of frequency band 944 without a Broadcasting License. Unlicensed users run the risk of being fined.
Sleek, easy to use IFB transmitter with long range, terrific audio, and low distortion
Digital Hybrid Wireless technology combines digital and analog technologies to reap the benefits of both
Choose from 256 UHF frequencies in 100kHz steps
Microprocessor-controlled with easy-to-use menu-based navigation
Standard 3-pin XLR jack can accept mic, line, Clear Com, RTS1, and RTS2 signals
Output power of 250mW for long range transmission, BNC antenna included
Built-in mic preamp
Pilot tone squelch control
Frequency scrolling with Tx mute
Easy-to-read LCD Display
Compact and rugged aluminum housing
The IFBT4 from Lectrosonics is a high-quality IFB transmitter designed for applications where long operating range and great audio quality are needed, such as broadcasting, film, and theater. The sleek, simple box can be used as a stand-alone unit, or patched into other widely-used intercom systems. The single XLR input connector is accompanied by four DIP-switches for selecting a mic, line, Clear Com, RTS1, or RTS2 audio source.
The Digital Hybrid Wireless technology allows the system to overcome channel noise by digital encoding and decoding audio in the transmitter and receiver, but sends the encoded signal over an analog FM signal. Due to the FM link being used, the system has all the benefits of traditional FM systems, including high range and resistance to interference, but thanks to the digital technology, the analog compander and artifacts are removed for greater audio quality.
The system is easy to use, featuring a menu-based, microprocessor-controlled system that is navigated with momentary buttons. The backlit LCD is bright and clear for easy reading. The casing is constructed from rugged aluminum to withstand the rigors of professional use, and it is small enough to use in any situation.
FCC Part 74 prohibits use of frequency band 944 without a Broadcasting License. Unlicensed users run the risk of being fined.
Sleek, easy to use IFB transmitter with long range, terrific audio, and low distortion
Digital Hybrid Wireless technology combines digital and analog technologies to reap the benefits of both
Choose from 256 UHF frequencies in 100kHz steps
Microprocessor-controlled with easy-to-use menu-based navigation
Standard 3-pin XLR jack can accept mic, line, Clear Com, RTS1, and RTS2 signals
Output power of 250mW for long range transmission, BNC antenna included
Built-in mic preamp
Pilot tone squelch control
Frequency scrolling with Tx mute
Easy-to-read LCD Display
Compact and rugged aluminum housing
Lectrosonics IFBT4 Specs
| Operating Frequency | 614.4 to 639.9MHz |
| Frequencies | 256 Channels Per Block |
| Channel Spacing | 100kHz |
| Spurious and Harmonic Suppression | 37dBc Above 1GHz |
| Frequency Stability | ±0.001% (10 ppm) @ 25°C |
| Temperature Stability | ±0.001% (10 ppm) @ -30 to +50°C |
| Compatibility Modes | IFB, Digital Hybrid Wireless (400 Series), 100 Series, 200 Series, Mode 3, Mode 6 |
| Pilot Tone | 29.997kHz IFB Mode, 32.765kHz 200 Mode, 400 Mode Step Selected, 32.768kHz Mode 6 |
| Modulation | FM, ±20kHz Deviation IFB & 100 Mode, ±75kHz 200 & 400 Mode, ±50kHz Mode 3 and Mode 6 |
| Audio Frequency Response | 100Hz - 8kHz, ±1dB IFB Mode 30Hz - 20kHz, ±1dB 200 & 400 Mode |
| Low Frequency Roll-Off | 3dB Down @ 35 or 50Hz, Menu Selectable |
| Signal to Noise Ratio | 90dB Typical, A-Weighted |
| RF Power Output | 250mW, Nominal |
| Output Impedance | 50 Ohms |
| Audio Input Level | Line, RTS1, RTS2: 0dBu Clear Com: -10dBu Mic Dry Inputs: -42dBu |
| Audio Input Impedance | Balanced: Greater than 2 kOhms Unbalanced: Greater than 1 kOhm |
| Gain | -18 to +24dB, Software Selectable |
| Connectors | 1 x XLR Input Connector 1 x BNC Antenna Connector 1 x DC Power Input |
| Controls and Indicators | 4 x Mode Switches (For Selecting Type of Input Source) 1 x Menu Button 2 x Select Buttons (Up/Down) 1 x Off/Tune/Xmit Switch 1 x Backlit LCD Display |
| Power | 12-14VDC, Typical, 200mA Max |
| Dimensions | 5.25 x 3.25 x 1.25" (133 x 83 x 32mm) |
| Weight | 9 oz (255g) |
Packaging Info
| Package Weight | 2.4 lb |
| Box Dimensions (LxWxH) | 14 x 10.5 x 4.2" |
In the Box
- Lectrosonics IFBT4 - Frequency-Agile IFB Transmitter (Frequency Block 944)
- Antenna
- Owner`s Manual
- 2-Year Manufacturer Warranty
Not in the Box
- Essential Batteries & Power (Not Included)
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