Williams Sound FM 557-12
FM+ System Package (12 R37 receivers)

Description

The FM 557 system package is a complete turnkey solution includes 12 PPA R37N receivers and an FM+ transmitter for both FM and Wi-Fi transmission from the same box.

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, or ANT 025.
  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 indiacted 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) Transmited 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 557-12 Specifications (PDF)

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