Lectrosonics IFBT4-20

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Lectrosonics IFBT4-20

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  • Lectrosonics IFBT4-20
  • Lectrosonics IFBT4-20
  • Lectrosonics IFBT4-20
  • Lectrosonics IFBT4-20
Manufacturer Part:
4.00 LBS


Lectrosonics Frequency-Agile IFB Transmitter (Frequency Block 20)


Frequency-Agile IFB Transmitter (Frequency Block 20)

Product Highlights:
- Dual Hybrid Wireless Technology
- XLR Input
- Backlit LCD
- Aluminum Construction

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Lectrosonics Frequency-Agile IFB Transmitter (Frequency Block 20)


Lectrosonics IFBT4-20 - Frequency-Agile IFB Transmitter (Frequency Block 20)
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.

NOTE: In most cases "stock" manufacturer images and descriptions are used in this catalog. Actual Rental items may vary slightly.


Operating Frequency 524.5 to 536.3MHz
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 (LxWxH) 5.25 x 3.25 x 1.25" (133 x 83 x 32mm)
Weight 9 oz (255g)
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Technical Specs

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