Certifications
Approvals
FCC, RoHS3, WEEE, Industry Canada
Warranty
2-year parts and labor
Dimensions
Dimensions
8.45″ W x 8.25″ D x 1.72″H (21.5 cm x 21 cm x 4.4 cm)
Total Cable Length
22 ft
Active Antenna Length
80 in
Audio
Output
24 VDC, 750 mA, 18W. 2.5mm ID center positive barrel connector
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)
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
Headphone Output
1/4″ TRS stereo jack, mono signal, 14.85 mW at +9dB, maximum in 33 Ω (level adjustable in menu 0 to -40 dB in 2 dB steps)
Microphone
-55 dBV (1.7 mV RMS) -22 dBV (80 mV RMS) +20 dBV (10.0 V RMS)
Impedance
8-16 Ohms
Sensitivity
2 µV at 12 dB Sinad with squelch defeated
Audio Output
35 mW max, peak into 16 ohms
Connectivity
Input
100-240 VAC, 50/60 Hz. IEC LineCord
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
Line Output
RCA jack (black), -10 dBV (.32 VRMS); Output impedance 100 ohms at +9dB
Connector Type
F-connector
Connector
NKL 001: 3.5 mm mono plug NKL 001-S: 3.5 mm stereo plug with ring disconnected
Input Power
500 mW max
Input Overload
100 mV
Output Connector
3.5 mm stereo/mono phone jack
Construction
Color
Black/Silver with silver legends on the front, white legends on the back
Cable Type
RG 59 coax
Controls
LED Indicator
Power: Green; Low Battery: Flashes Green
Compatibility
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.)
Environmental
Temperature Range Operating
+32° F to +122° F (0° C to 50° C)
Temperature Range
– 0 to 50C
Shipping
Weight
Transmitter: 3.2 lbs (1.45 kg)
Identifiers
Length
18.5” cord
General
NOTES
The FCC requires this device to be used with approved, FCC 15.203 compliant antennas and be professionally installed. Refer to Williams AV’s Antenna Selection Install Guide for compliant antennas for this product.The FM + connects to the installation location’s Wi-Fi Network. It does not provide a network on its own. The Wi-Fi network will need to be installed and established before the FM + can be used.
FM 557 PRO
Rack Mount Standard 19” Rack, one EIA rack space high, 1/2 space wide1–2 units can be mounted in a single rack space with optional RPK 005 (single) or RPK 006 (double) Rack Mount Kits, RF Outputs (1x) #10-32 stud connector in center of unit (pcb mounted)(1x) F-connector on rear chassis, Input Levels (Bal or Unbal) (at Audio Input Gain = 0dB) Nominal (1st Amber + 3dB LED)Overload Warning (Displayed on Screen)Absolute Max. Rating (Stresses above these ratings may cause permanent damage or degrade reliability.)
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.
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
RF Section
Operating Frequencies: 72.1-75.9 MHz , 17 wideband channels (selectable)
Deviation
± 75 kHz maximum
Pre-Emphasis
75 microsec
RF Field Strength
Does not exceed 80 mV/m at 3 m
RF Transmit Indicator
1 Green LED On Air Indicator
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.
Common Mode Rejection
Greater than 57 dB @ 1 kHz, Mic or Line
Line
-25 dBV (55 mV RMS) +16 dBV (6.3 V RMS) +20 dBV (10.0 V RMS)
Use with
PPA T45, PPA T55, PPA T55C, PPA T27 Transmitters
Nominal Impedance
75 Ohm
Current Consumption
52mA nominal
PPA R37N
Channels 17, accessed via seek button in battery compartment
Operating Freq.
72.1, 72.2, 72.3, 72.4, 72.5, 72.6, 72.7, 72.8, 72.9, 74.7, 75.3, 75.4, 75.5, 75.6, 75.7, 75.8, 75.9 MHz*
Intermediate Freq.
75 kHz
FM Deviation
75 kHz
De-Emphasis
75 µS
AFC Range
± 120 kHz
Receive Antenna
Integral with earphone/headphone cord
Earphone
Earbud-type with foam cushion, 3.5 mm plug, 32 Ω
Auto Shut-off
Enters sleep mode after approx 6 mins of no RF signal
IDP 008
10-3/8" (L) x 6-¼" (W) x 1/8" (H)
RF
Frequency Accuracy
± 2 ppm stability, 0-50° C
Transmission Range
Up to 1000 ft (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector
Indicators
RF Power
Full, Medium, Low or OFF indiacted by menu icon.
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
Power
Battery Type
(2) AA Alkaline or 2 x AA NiMH
Battery Life
Two (2) AA non-rechargeable alkaline batteries (BAT 001), approx. 50 hrs(2) AA rechargeable NiMH batteries (BAT 026), 1500 mAh, approx. 32 hrs
Radio
Modulation
FM, +/- 75 kHz peak deviation
