Nautel NX100 – 100kW AM Transmitter

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nautel_nx100

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

  • 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

Product Resources

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