Williams Sound FM T55
FM+ Assistive Listening System

Description

The FM+ integrates professional WaveCAST Wi-Fi audio server technology into a Williams AV FM assistive listening system. End users can now listen with either an FM receiver or with their own smartphone (via the WaveCAST Receiver App). Along with this flexibility comes exceptional audio quality, as the FM+ is built on a professional digital audio (DSP) platform.

Specifications

• Power Supply: Desktop Style Transformer (TFP 062)
• Input: 100-240 VAC, 50/60 Hz. IEC Line Cord
• Output: 24 VDC, 750 mA, 18W. 2.5mm ID center positive barrel connector
• Power ON Indicator: Push On/Push Off latching power button, backlit green indicates power ON, backlight off indicates power OFF, fading from bright to dark indicates Sleep Mode.
• Temperature Range: Operating: +32° F to +122° F (0° C to 50° C)
• Storage: -4° F to +158° F (-20° C to 70° C)
• User Interface: 3.12" High Resolution OLED display with selections via buttons. Hosted Web page. Remote control and monitoring.
• Dante: Only available on FM T55 D
• Ethernet: RJ-45 on back of unit supports CAT 5e cable lengths up to 328 feet (100 meters)
• 10/100 Base-T IEEE 802.3 compliant, unique MAC address
• RF Section: Operating Frequencies
• 72.1-75.9 MHz , 17 wideband channels (selectable): Frequency Accuracy
• ± 2 ppm stability, 0-50? C: Deviation
• ± 75 kHz maximum: Pre-Emphasis
• 75 microsec: RF?Field Strength
• Does not exceed 80 mV/m at 3 m: Compatible Antennas
• ANT 005, ANT 021, ANT 024, ANT 025, ANT 029
  Refer to Williams AV?s Antenna Selection Install Guide for FCC-compliant antennas for this product.
  : Transmission Range
• Up to 1000 ft (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector: RF Outputs
• (1x) #10-32 stud connector in center of unit (pcb mounted) (1x) F-connector on rear chassis: RF Transmit Indicator
• 1 Green LED On Air Indicator: RF Power
• Full, Medium, Low or OFF indicated by menu icon.: RF Time Out (sleep mode)
• 30 min. duration, 4 hr. duration, or Always On selected via menu. Starts when audio is below -18 dB level with no button pressed for selected duration.: Audio Section
• Audio Processor Functions: DSP based
• Compression: 1: 1, 1.5: 1 or 2: 1
• High-pass and Low-pass Filter Frequency control
• Frequency Response: 31-16000 Hz, ±3 dB (re: 1 kHz, ±3 dB) (?Music" Audio Preset)
• Signal-to-Noise Ratio: 67 dB (typical) Transmitted RF
• Total Harmonic Distortion: Less than 0.25% @ 1 kHz (RF output)
• Common Mode Rejection: Greater than 57 dB @ 1 kHz, Mic or Line
• Audio Inputs: (1x) Combination 3-pin XLR, 1/4" (TRS) jack for balanced or unbalanced line level, or balanced or unbalanced microphone with selectable phantom power
• Audio Input Gain Adjust: In menu, adjustable to 0 to -50 dB, in 1dB steps
• Phantom Power: 14.4 VDC applied through 2.2 kOhms resistors to analog combo jack: Pin 2 and Pin 3 on XLR jack, or tip and ring on 1/4" TRS jack
• Audio Level Indicators: 10-LED?array that reads -18 to +9 dB at 3 dB intervals. 7 Green, 2 Amber, and 1 red LED. Green LEDs indicate normal operating audio level peaks, Amber LEDS indicate close to overload peaks, Red LED indicates overload peaks
• Headphone Output: 1/4" TRS stereo jack, mono signal, 14.85 mW at +9dB, maximum in 33 Ohms (level adjustable in menu 0 to -40 dB in 2 dB steps)
• Line Output: RCA jack (black), -10 dBV (.32 VRMS)
• Output impedance 100 ohms at +9dB
• Input Levels (Bal or Unbal) (at Audio Input Gain = 0dB): Nominal (1st Amber + 3dB LED)
• Overload Warning (Displayed on Screen): Absolute Max. Rating*
• : Microphone
• -55 dBV (1.7 mV RMS): -22 dBV (80 mV RMS)
• +20 dBV (10.0 V RMS):
• Line: -25 dBV (55 mV RMS)
• +16 dBV (6.3 V RMS): +20 dBV (10.0 V RMS)
• : Approvals
• FCC, RoHS3, WEEE, Industry Canada: Warranty
• 2-year parts and labor

Downloads

• Williams Sound FM T55 Specifications (PDF)

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