Block 21: 537.600 - 563.100 MHz
Wireless IFB (interruptible fold back) systems are used for talent cueing and crew communications in broadcast and motion picture production. In other cases, the IFB system is used by directors and other management to monitor program audio during a production.
UHF wireless IFB Transmitter basestation with 256 selectable frequencies at 100kHz increments. Stand alone or rack mountable with the PRK-2 kit. Non-RoHs
NOTE: This product is not approved for sale in Europe.
Operating Frequencies: 486.4 to 691.1MHz
Block 20: 512.0 to 537.5 MHz
Block 21: 537.6 to 563.1 MHz
Block 24: 614.4 to 639.9 MHz
Block 25: 640.0 to 665.5 MHz
Block 26: 665.6 to 691.1 MHz
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 ClearCom, 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 ClearCom
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:
Power OFF-TUNE-XMIT, 3 position slide switch
Select Up momentary pushbutton switch
Select Down momentary pushbuttonswitch
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.