- Main Features:
- Standard power outputs: 3 kW to 400 kW
- Custom systems delivered to 2 MW
- Advanced user interface (AUI)
- Power saving MDCL
- HD MER Instrumentation
- All-Digital AM Capable
- Specifications
- GENERAL
- Transmitter Type
- Medium wave, AM, 100% solid state
- Configuration
- Twenty RF power modules, each including a single integrated RF amplifier/modulator
- No frequency dependent parts in RF module
- Each module is hot pluggable and has internal microcontroller for protection and monitoring over a serial bus
- Short circuit protection at the module level offers an added layer of protection
- Optional redundant digital single board exciters utilizing FPGA/DSP technology with automatic changeover
- Pre-correction utilized specifically to improve digital performance
- Redundant low voltage power supplies
- RF Output Power
- Maximum: 75 kW RMS
- Peak Power: 288kW
- Carrier Power Range: Continuously adjustable from 0 to 55 kW in 100 W steps
- Up to 62 preset levels, presets may include other operational parameters such as DRM vs Analog and different program inputs
- Output level stabilized against AC supply voltage variations
- Built in Dynamic Carrier Control
- Built in AM stereo
- RF Output Connection
- 3 1/8 EIA female standard, other outputs on request
- RF Output Impedance
- 50 ohms, unbalanced
- Efficiency
- 90% typical at 50 kW
- RF Load VSWR
- 8000 peak reflected watts (1.5:1 VSWR @ 50 kW, 100% modulation) results in instantaneous power shutback
- 2000 reflected watts RMS (1.5:1 VSWR @ 50 kW, 0% modulation) results in a graceful power reduction
- Frequency Range
- 531 kHz to 1,620 kHz.
- "Quick frequency change capability"
- Frequency Stability
- ±2 ppm/year over temperature range
- Optional 300 ppb ovenized source with GPS option
- Modulation Type
- 6 phase direct digital modulation
- 1.8 MHz modulation sample rate
- Modulation Capability
- 140% positive peak modulation to 50 kW
- 130% positive peak modulation to 55 kW
- Spurious and Harmonic
- 80 dB or more below carrier at 50 kW
- Meets ITU-R SM.328-10
- Meets ITU-R SM.329-9
- AC INPUT
- Voltage
- 340 V to 510 V, 3 phase or to customer specifications
- Power Supply Variation
- ±10% voltage, 47 Hz to 63 Hz
- Power Consumption
- 55.5 kW typical at 50 kW, 0% modulation
- 85 kW typical at 50 kW, 100% modulation
- Cos (theta)
- 0.95 typical
- ENVIRONMENTAL
- Temperature Range
- 0°C to + 50°C
- Derate 3°C per 500 m above sea level (2°C per 1,000 ft)
- Cooling
- Forced Air
- Humidity Range
- 0% to 95% non-condensing
- Altitude
- 0 m to 4,000 m (0 ft to 13,000 ft)
- Cooling Air Requirements
- 2,550 m³/hr (1,500 CFM)
- SAFETY
- Meets EN60215: 1996 Safety Requirements for Radio Transmitting Equipment
- PHYSICAL
- Dimensions
- 184.2 cm H x 95.7 cm W x 120 cm D (72.4" H x 37.7" W x 47.2" D)
- Weight
- Main transmitter cabinet with modules installed: 567 kg (1250 lbs)
- Power transformer: 417 kg (919 lbs)
- AUDIO PERFORMANCE
- Analog Broadcast Inputs
- Dual AES-EBU Digital Audio inputs* adjustable from -30dBFS to 0dBFS for 100% modulation
- 600 ohms balanced analog audio input +10 dBm nominal for 100% modulation, adjustable from -10 to +12 dBm
- Digital Broadcasting Inputs
- I,Q over AES-EBU, SRC available* with sample rate converter
- I,Q over LVDS, 3 pairs, Clock, Data, frame sync
- *Two AES-EBU inputs provided and may be used for either analog audio or digital I,Q inputs
- Optional Embedded DRM Generator/Content Server
- Optional Integrated HD Radio Generator (Exgine™)
- Frequency Response
- +0.2 dB/-0.8 dB, 30 Hz to 10,000 Hz
- Optional audio input filters available to meet regional bandwidth restrictions
- Total Harmonic Distortion
- Better than 0.8% (THD), 30 Hz to 10,000 Hz at 95% modulation (typical)
- Intermodulation Distortion
- SMPTE 1:1 Ratio, 60Hz/7kHz, 95% Mod Peak - 0.5% @ 50kW (typical)
- DIM-B, 2.96kHz/9kHz, 80% Mod Peak - 0.5% @ 50kW
- Carrier Shift
- 0.5% or less
- Hum and Noise
- -65 dB or better below 50kW, 100% modulation
- CONTROL AND MONITORING
- Extensive Control/Monitoring/Troubleshooting system through 17" front panel LCD touchscreen. Touch panel control system is non-critical and may be removed from the system without affecting transmitter operation or remote control/monitor via direct wired connections. Redundant back-up control interface provides control in case of front panel computer system failure. Built in instrumentation providing detailed spectrum/impedance and modulation analysis.
- Metering (Cube)
- DC Voltages (B+, PA and 15V)
- DC Current
- Sample Levels (PDM and RF Drive)
- Fan Speeds
- Heat Sink Temperature
- Rack
- DC Voltage levels (15V, 5V, 30V, 48V and B+)
- Rectifier Fan Speeds
- DC Current
- Rectifier Heat Sink Temperature
- AC Voltage
- Metering (Exciter)
- Output Current (RMS, Peak, Carrier)
- Output Voltage (RMS, Peak, Carrier)
- Forward Power (RMS, Peak, Carrier)
- Reflected Power (RMS, Peak, Carrier)
- Audio/Modulation Levels (RMS and Peak - Positive/Negative)
- Load Impedance
- Controller
- PDM and RF Drive Levels
- Ambient Temp
- RF Monitor
- RF monitor is a power sample (using a directional coupler) that will allow for accurate audio performance measurements
- Status
- Easy access to current transmitter operating state, past and present alarm conditions and historical trends of both digital and analog channels
- Schedule
- Intuitive easy to read built in scheduler
- Up to 144 yearly rules can be defined by user
- Remote Control/ Monitoring - Three remote interfaces:
- Direct wired optically isolated inputs and open collector outputs
- Web interface - All locally available control is available over TCP/IP web interface
- SNMP
- COMPLIANCE - Product complies with:
- ISED specification BETS-5 issue 1
- FCC CFR title 47 part 2 and part 73
- Conforms with all essential requirements of Radio European Directive 2014/53/EU
- Notes:
- Specifications defined in a laboratory environment with high grade source and demodulation equipment. Standard factory measurements do not include all items.