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. The IFB R1a receiver provides simplicity and flexibility in a package that is intuitive for untrained users to operate.
The receiver is housed in a rugged machined aluminum package. An optional spring-loaded belt clip (shown at right) provides a secure mounting on a wide variety of belts, pockets and fabrics. The belt clip is removable to reduce its size and allow mounting into other types of bags and belt worn mounting systems common in field production.
Block 470: 470.100 - 495.600Block 19: 486.400 - 511.900Block 20: 512.000 - 537.500Block 21: 537.600 - 563.100Block 22: 563.200 - 588.700Block 23: 588.800 - 607.900, 614.100 - 614.300Block 24: 614.400 - 639.900Block 25: 614.400 - 639.900Block 26: 665.600 - 691.100Block 27: 691.200 - 716.700*Block 28: 716.800 - 742.300*Block 29: 742.400 - 767.900*Block 944: 944.100 - 951.900*export only
Preset frequency can be set without power or transmitter signalScan mode stores up to five additional frequenciesMulti-color LED and rotary control for programming and operationHigh sensitivity for extended operating range indoors or outdoorsRugged machined aluminum housingAttached battery door8 hours battery life (alkaline)20 hours battery life (lithium)256 frequencies in 100 kHz incrementsMicroprocessor controlledPilot tone squelchCompandor noise reduction
Frequency control: Crystal Controlled PLLSensitivity: 1 uv (20 dB SINAD)Signal/Noise ratio: 95 dB A-weightedSquelch quieting: 90 dBAM rejection: 50 dB, 10 uV to 100 mVModulation acceptance: ±20 kHzSpurious rejection: Greater than 70 dBThird order intercept: 0 dBmFrequency response: 100 Hz to 10 kHz, (±1db)Pilot tone: 29.997 kHz, 2 kHz deviation (fixed crystal controlled)Audio output: 1V RMS into 50 Ohms minimumAntenna: Headphone cableMin. headphone impedance: 25.6 OhmsProgrammable memory: Switches set default frequency; up to five additional frequencies can be stored in memoryFront panel controls: Single knob controls Audio Output Level, Power On, Programming and Scan Frequency SelectionIndicators: Multi-color LED indicator for power on and battery status. Blinks to indicate channel number and during scanning.Battery Requirements: 9V alkaline battery lasts about 8 hours, 9V lithium battery lasts about 20 hoursPower consumption: 60 mAWeight: 7.3 oz with batterySize: 3.6 x 2.4 x 0.8 inches (housing only)