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User Manual for Lectrosonics IFBT4-VHF Frequency Agile IFB Transmitter Click to enlarge the picture
Contents of the user manual for the Lectrosonics IFBT4-VHF Frequency Agile IFB Transmitter
- Product category: IFB & Cueing Lectrosonics
- Brand: Lectrosonics
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Lectrosonics IFB & Cueing
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User manual for the Lectrosonics IFBT4-VHF Frequency Agile IFB Transmitter contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Lectrosonics product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Lectrosonics user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Lectrosonics product will considerably shorten its lifespan!
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Product description The IFBT4-VHF Frequency Agile IFB Transmitter from Lectrosonics is 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. 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. An LCD display is backlit for use in dimly lit conditions and is also visible in direct sunlight. Furthermore, 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 studio line level can also be fed directly into the transmitter. Finally, the transmitter is housed 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. In the Box Lectrosonics IFBT4-VHF Frequency Agile IFB Transmitter (174.100 to 215.750 MHz) 1/4 Wave BNC Whip Antenna AC Adapter Limited 1-Year Warranty Table of Contents
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Technical parametersLectrosonics IFBT4-VHF Specs | 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) | | | | Package Weight | 3.25 lb | | Box Dimensions (LxWxH) | 14.0 x 10.7 x 4.2" |
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