Color

Black

Rack Mount

Standard 19” Rack, one EIA rack space high, 1/2 space wide; 1–2 units can be mounted in a single rack space with optional RPK 005 (single) or RPK 006 (double) Rack Mount Kits

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), (1x) F-connector on rear chassis

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 O.

Dante Output

(1x) RJ-45 jack