Overview

• UHF wireless IFB Transmitter basestation
• Operate between 537.6 - 563.1 MHz
• Stand alone or rack mountable with the PRK-2 kit
• Selectable Low-Frequency roll-off
• “Locked” setting prevents accidental changes
• Overcomes channel noise and compandor artifacts
• Tough machined aluminum case housing

NOTE: This product is not approved for sale in Europe.

Specifications

• Operating Frequencies: Block 19: 537.6 - 563.1 MHz

*This block is targeted to be banned by the FCC for use within the US by July 13, 2020.

• Frequencies Channels (per block): 256

Channel spacing

• 100 kHz (0.1 MHz)
• Spurious & Harmonic Suppression: 37 dBc above 1 GHz
• Frequency Stability: ±.001% (10 ppm) @ 25ºC
• Temperature Stability: ±.001% (10 ppm) from -30º C to +50º C
• Channel Selection: Momentary pushbutton switches, TUNE UP and Down
• Compatibility Modes: IFB, Digital Hybrid Wireless; 400 Mode, 200 Mode, 100 Mode, Mode 3, Mode 6
• Pilot Tone: 29.997 kHz IFB Mode, 32.765kHz; 200 Mode, 400 Mode step selected, 32.768kHz Mode 6
• Modulation: FM, ±20 kHz deviation IFB & 100 Mode, ±75kHz 200 & 400 Mode, ±50kHz Mode 3 and Mode 6
• 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)
• RF Power Output: 250 mW (nominal)
• Output Impedance: 50 Ohms
• Audio Input Levels: 0 dBu for Line, RTS1 & RTS2, -10 dBu for Clear-Com, and -42 dBu mic dry inputs, +/-50VDC max
• Audio Input Config: Balanced and Unbalanced, rear panel selectable for Line, Mic, RTS 1, RTS 2 and Clear-Com
• Audio Input Impedance: Greater than 2 K balanced, greater than 1K unbalanced at any gain setting
• Control Range: -18 dB to +24 dB (0 dB nominal center), software 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

• 9oz
• Size: 5.25” long (including connectors) x 3.25” wide x 1.25” high
• Emission designator: 180KF3E
• The T4 IFB transmitter is FCC type accepted under Part 74:470 – 608MHz and 944.1 – 951.9 MHz
• The FCC requires that the following statement be included in this manual:
• This device complies with FCC radiation exposure limits as set forth for an uncontrolled environment. This device should be installed and operated so that its antenna(s) are not co-located or operating in conjunction with any other antenna or transmitter. A separation distance of at least 20cm (8 inches) must be maintained to comply with the FCC Radio Frequency Maximum Permissible Exposure (MPE) requirements.