Summary
Summary
With power outputs of 50 to 2,000 kW, the NX Series sets a new standard for digital
performance, rugged design and operational ease in the industry’s most compact
enclosure. Add AM adaptive precorrection, up to 90% efficiency, available integrated
DRM exciter or HD Radio Exgine card plus an intuitive touch screen interface and the
result is the most advanced medium wave transmitter available today.
Features
Features
- 110 kW RF maximum output power
- Industry leading efficiency: 90% at 100kW typical
- AM precorrection
- Outstanding linearity
- 2.7 mega-samples/second Direct Digital Modulation
- 17″ touch screen interface (AUI)
- 100% of local interface via the web
- Instrument grade spectrum analyzer
- The standard in compact AM design
Technical Specification
Technical Specification
Transmitter Type
- Medium wave, AM, 100% solid state
Configuration
- Forty RF power modules, each including a single integrated RF amplifier/modulator
- No frequency dependant 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
- Dual 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: 150 kW RMS
- Peak Power: 552 kW
- Carrier Power Range: 0 to 110 kW
- 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 100 kW
RF Load VSWR
- 16,000 peak reflected watts (1.5:1 VSWR @ 100 kW, 100% modulation) results in instantaneous power shutback
- 4000 reflected watts RMS (1.5:1 VSWR @ 100 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 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
- 135% positive peak modulation to 100 kW
- 120% positive peak modulation to 110 kW
Spurious and Harmonic
- Meets ITU-R SM.328-10
- Meets ITU-R SM.329-9
Voltage
- 340 V to 440 V, 3 phase or to customer specifications
Power Supply Variation
- ±10% voltage, 47 Hz to 63 Hz
Power Consumption
- 111 kW typical at 100 kW, 0% modulation
- 167 kW typical at 100 kW, 100% modulation
- Cos (theta) 0.95 typical
Temperature Range
- 0°C to + 50°C Derate 3°C per 500 m above sea level (2°C per 1,000 ft)
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: 1976 Safety Requirements for Radio Transmitting Equipment
