WEATHER RADIO
TRANSMITTERS

CEC Weather Radio Transmitters are used to deliver a continuous stream of weather and other messages to the public. These messages can include weather forecasts, weather warnings, and warnings of public safety threats. Transmissions also include digital code that can alert the public to localized threats and can trigger the FCC’s Emergency Alert System (EAS). CEC Weather Radio Transmitters provide the convenience, flexibility, and redundancy needed in a weather radio solution.

Choose between WR300B and WR1000B Weather Radio Transmission Systems depending on the desired power output

Variable frequency selection from 162.400 to 162.550 MHz

Variable power output from 100W to 375W for the WR300B or 300W to 1250W for the WR1000B

Compliant with, and tested to meet, NOAA Specifications

CEC weather radio transmitters save lives by delivering a continuous stream of weather and other messages to the public.
  • AC input located at the top of cabinet for ease of installation.
  • I/O Panel provides a convenient location for interfacing to the transmitter.
  • Top panel accessibility for ease of access and installation.
  • Terminal block and hinged foldout front panel allows easy access for customer connections and maintenance.
  • CEC designed Graphical User Interface for all transmitter control and monitoring aids in troubleshooting and operation.
  • Central control and data connect point provides remote monitoring and control of the transmission system.
  • RTC control of each transmitter.
  • Dual 115 VAC +10% or 240 VAC +10% input lines to transmitters.
  • Supplies 115 VAC to the other components in the transmitter
  • Each transmitter a complete stand-alone RF system with a frequency-agile FM exciter and controller, driver amplifier, power amplifier(s), amplifier combiner, output low-pass filter, and power supply assembly.
  • Includes NWS supplied ROAMS interface box, data line surge suppressor, and modem for ease of operation in the NWS network.
  • Air-cooled design is lab tested to meet all NOAA specifications while operating over a temperature range of -22°F to +122°F (-30°C to +50°C).
  • Dual transmitters operating in a redundant primary & secondary configuration.
  • Transmitter controllers eliminate a single point of failure common in most broadcast transmitters.
  • Redundant air-cooled exciters and amplifiers allow full power operation during a failure event and ensures system operates at maximum levels of performance.
  • Input/Output connections include CAN bus, audio connections, monitoring point for on-site troubleshooting, antenna switch control, and antenna directional coupler.
  • RF output from the redundant amplifiers feeds the CEC supplied RF switch and is directed to the antenna or the CEC supplied dummy load.
WeatherRadioFeature

SPECIFICATIONS

ElectricalMechanicalEnvironmental
Transmission Mode:
Narrowband FM (F3E)
Size:
EIA 19-inch rack.
H - 50 inches;
W - 24 inches;
D - 34 inches
Operating Environment: Temperature -22 ºF to +122 ºF (-30 ºC to +50 ºC)
RF Frequency Range :
162.400 to 162.550 MHz in 25 kHz steps
Weight:
WR300B: 314 pounds.
WR1000B: 400 pounds
Humidity:
10 – 95% Non-condensing
RF Deviation: ±5 kHzMaximum Altitude: 15,000 feet (4572 meters)
RF Frequency Stability:
Better than 0.0005% over the environmental temperature range
RF Power:
WR300B: 100 to 375 watts adjustable,
SWR 3:1 maximum with auto-foldback at higher reflected power.
WR1000B: 300 to 1250 watts adjustable,
SWR 3:1 maximum with auto-foldback at higher reflected power.
Output Impedance: 50 Ohms Unbalanced
Audio Frequency Response:
100 Hz - 5 kHz, within +1/-3 dB of 6dB per octave pre-emphasis
Audio Input:
600 Ohms Balanced
Audio Input Level:
-20 dBm to +5 dBm for ±5 kHz deviation
Audio Distortion:
Less than 1.0% @ 1 kHz
Telephone Input:
600 Ohms Balanced
Telephone Input Level:
-27 dBm to +2 dBm for ±5 kHz deviation
FM Hum & Noise: Better than -40 dB
AM Noise:
Better than -34 dB
Spurious Emission: Better than -74 dBc
Primary Power: WR300B: 100-265 VAC, single phase, 57-63 Hz
WR1000B:
208-265 VAC, single phase, 57-63 Hz
System Power Consumption: WR300B: Equal to or less than 750VA @ 300 watts
WR1000B: Equal to or less than 2500VA@1000 watts
MTBF:
Better than 10,000 hours
Regulatory:
Meets or exceeds NWS Contract 52-DGNW-8-90040
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