The Transmitter shall operate in the 72-76 MHz Auditory Assistance Band as approved by the FCC. Specifically, the transmitter shall operate on the wideband channels spaced at 100 kHz increments on frequencies of 72.1 to 72.9, 74.7, and 75.5 to 75.9 MHz. The transmitted field strength shall not exceed 80 millivolts per meter at a 3 meter distance. The operating frequency and mode: Stereo or Mono shall be shown on an LCD display and be programmable by front panel tune UP/DOWN buttons. The transmitter shall be FCC and Industry Canada approved.
Maximum FM deviation shall not exceed ±75 kHz. Frequency stability shall be controlled by a phase-locked loop frequency synthesizer with crystal reference and shall be accurate within ±0.001% from 0-50° C. The transmitter shall permit fitting of a 7" flexible whip antenna mounted through the top cover of the unit, or permit connection of an optional magnet mount antenna, with coaxial cable, to a rear panel connector. Only the particular antenna type intended for this connection shall be specified.
The transmitter shall have XLR connectors for balanced audio inputs and RCA Phono connectors for unbalanced audio inputs. The transmitter shall provide a GROUND LIFT switch for the XLR inputs. The transmitter shall provide full deviation for monaural input signals to the LEFT AUDIO INPUT connectors when programmed for the MONO mode. The transmitter shall permit switch selection of no limiting, limiting only, or limiting and compression operation from a rear panel switch. There shall be a front panel control to adjust the audio input level with an LED OVERMODULATION indicator. There shall be a front panel 1/4" stereo monitor jack with volume control.
The transmitter shall be powered by an external AC line to 12 VDC power adapter. The rear panel shall have a power switch and front panel display indication when power is active. The transmitter shall be rack mountable in a standard 1 RU rack steel package. The R.L. Drake ALT1000 Assistive Listening Transmitter is specified.
