Lectrosonics IFBT4-VHF, IFB TX, BASE STATION TYPE (Frequency Block VHF: 174.100 to 215.750 MHz)
Vendor: Lectrosonics
Available
Lectrosonics IFBT4-VHF, IFB TX, BASE STATION TYPE (Frequency Block VHF: 174.100 to 215.750 MHz)
The Lectrosonics IFBT4-VHF is a Frequency Agile IFB Transmitter designed for use in broadcast, motion picture, theater, and stage applications where extended operating range and high-quality audio are essential. It can be used as a stand-alone device, or it can be patched directly into a popular intercom system. The Lectrosonics IFBT4-VHF Featuring 50mW output power and a design based on Lectrosonics patented Digital Hybrid Wireless system, the transmitter pilot tone signal controls the audio squelch on the IFBRA-VHF receiver (sold separately) to eliminate noise when the transmitter is turned off. This prevents the receiver from locking onto false signals. Also, it has an LCD display with backlit for use in dimly lit conditions and is also visible in direct sunlight.
Additionally, DIP switch settings on the rear panel provide direct compatibility with RTS and Clear-Com intercom systems. A preamp stage is also included in the input stage and allows direct connection to dynamic microphones in stand-alone applications. Moreover, direct output at the studio line level can also be fed directly into the transmitter. Finally, the Lectrosonics IFBT4-VHF is built in a strong, machined-aluminum case with an electrostatic powder coating and an anodized finish. It is powered by 6 to 18 VDC via a locking connector on the rear panel. Additionally, the transmitter is supplied with a 1/4 wavelength whip antenna, which is a detachable, galvanized-steel cable that also connects to a locking 50 ohms BNC connector on the rear panel. The AC power supply is also included.
Lectrosonics IFBT4-VHF Main Features
- Digital Hybrid Wireless Technology
- Microprocessor-Controlled Operation
- 50mW Power Output
- Pilot Tone Squelch Control
Operating Frequency | 174.100 to 215.750 MHz |
Channel Frequencies | 239 |
Channel Spacing | 175 kHz |
RF Power Output | 50 mW |
Frequency Stability | ±.001% (10 ppm) @ 77°F (25°C) |
Temperature Stability | ±.001% (10 ppm) from -22 to 122°F (-30 to 50°C) |
Channel Selection | Momentary pushbutton switches, tune Up and Down |
Compatibility Modes | Two: IFB and Digital Hybrid Wireless (400 Series) |
Pilot Tone | 29.997 kHz IFB & 400 MODE; each frequency has a unique pilot tone |
Modulation | IFB Mode: FM, ±20 kHz deviation Digital Hybrid Mode: ±75 kHz |
Frequency Response | IFB Mode: 100 Hz to 8 kHz, ±1 dB Digital Hybrid Mode: 30 Hz to 20 kHz ±1 dB response (see Roll Off) |
LF Roll Off | Menu selectable for 3 dB down at 35 Hz or 50 Hz |
Audio Compression | 2 to 1 (IFB 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) +/-50 VDC maximum |
Configuration | Audio Input: Balanced and unbalanced rear panel selectable for Line, Mic. RTS 1, RTS 2, and Clear-Com |
Audio Input Impedance | Greater than 2 KOhms balanced, greater than 1 KOhms 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 maximum Maximum Input Range: 6 to 18 VDC |
Power Input Connection | Coax type, locking LZR RL26AE |
Indicators | Backlit LCD: Displays modulation meter, frequencies, modes, roll-off, and audio level |
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 |
Emission Standard | 180KF3E |
Dimensions (L x W x H) | 5.25 x 3.25 x 1.25" (13.3 x 8.25 x 3.17 cm) |
Weight | 9 oz (255 g) |