Product Overview
The Williams AV FM+ C transmitter provides FM broadcast and Wi-Fi audio broadcast from a single input source. The FM+ C is ideal for assistive listening, language interpretation, and audio description. With “dual broadcast” technology, users have the option of listening to real-time audio stream on their smartphone or tablet using the free WaveCAST receiver app (iOS and Android) or use an available FM receiver from the venue.
The FM+ C has support for Telnet commands via an Ethernet port enabling AV professionals to control and monitor the FM+ C using third-party room control systems.
Williams AV FM+ C Includes:
- (1) ANT 025 antenna
- (1) TFP 062 power supply
- (1) WLC 004 line cord
Williams AV FM+ C Specifications:
- Dimensions: 8.45″ W x 8.25″ D x 1.72″H
- Weight Transmitter: 3.2 lbs
- Color: Black
- Rack Mount: Standard 19” Rack, one EIA rack space high, 1/2 space wide
- 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 with backlight. Green backlight indicates power ON, backlight off indicates power OFF.
- 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 1. 3.12” High Resolution OLED display with selections via buttons. 2. Hosted Web page. 3. Telnet commands over ethernet (see our WaveCAST and FM+ Programmers Guide” for available commands and protocol).
- Dante: (1x) RJ-45 jack. Only available on FM T55C 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. RJ-45 jack used for web page and streaming audio out. An external Router/DHCP Server is required to stream audio to receiving devices.
- 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 028, ANT 029, ANT 034
- 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 F-connector
- RF Outputs (1x) #10-32 stud connector in center of unit (pcb mounted)
- RF Transmit (RF) Power Indicator 1 OLED On Air Indicator with 4 states indicating power level Off, Low, Medium, and Full Power.
- RF Time Out (sleep mode) 30 min. duration, 4 hr. duration, or Always On; selected via web page. When audio drops below -18dB, the selected duration begins, and when it expires the unit stops transmitting and goes into a low-power (“sleep”) mode. Any button press or resumption of audio above -18dB “awakens” the unit and it begins transmitting again.
- Audio Section
- 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. Optional RJ-45 Dante Input (“D” models only).
- Audio Processor Functions: DSP based; Compression: 1:1, 1.5:1 or 2:1; High-pass and Low-pass Filter Frequency control, Music, Voice, and Hearing Assistance Audio Presets
- Frequency Response: 31-16000 Hz, ±3 dB (re: 1 kHz) (“Music” Audio Preset)
- Signal-to-Noise Ratio: 64 dB (typical) Transmitted RF @ 1kHz
- Total Harmonic Distortion: Less than 0.25% @ 1 kHz (RF output)
- Common Mode Rejection: Greater than 57 dB @ 1 kHz, Mic or Line mode
- Audio Input Gain Adjust: Adjustable from +24dB to -60 dB, in 1dB steps from front screen or web page
- 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 Display: Front screen bar graph display, each segment representing 3dB. It ranges from -18 (1 segment lit) to +12dB (10 segments lit). Over-range warning is indicated by ‘OLVD’ and flashing empty bar.
- Headphone Output: 1/4″ TRS stereo jack, mono signal, 7.8 mW total power with 33 Ω.
- Dante Output: (1x) RJ-45 jack, only available on FM T55C D
- Input Level (Bal or Unbal) (at Audio Input Gain = 0dB)
- Nominal (@7th Segment Lit): Overload Warning (Displayed on Screen) Absolute Max. Rating*
- Microphone:
- Line:
- Approvals: FCC, RoHS3, WEEE, Industry Canada
- Warranty: 2-year warranty against component failure and manufacturing defects. See the Full Warranty statement on the website for details.* Stresses above these ratings may cause permanent damage or degrade reliability.
