- Main Features:
- Extra power
- Operating Convenience
- Digital Performance Advantages
- Single phase power
- Automatic Standby
- Unattended Operation
- Maximum Redundancy
- Power outputs: 3 kW and 6 kW
- Specifications:
- Transmitter Type:
- Medium wave, 100% solid state
- Configuration:
- Eight broadband RF amplifiers and four modulators
mounted in a plug-in RF Module - Dual DDS exciters and modulation encoders.
Full automatic changeover - Second redundant spare module with full automatic changeover (optional)
- RF Output Power:
- Maximum: XR3 - 3.75 kW
- Max average power:
XR3 - 4.5 kW
(3 kW + 100% modulation) - Range: XR3 - 50 W to 3.75 kW
- Six programmable preset power level profiles, selectable locally or remotely
- RF Output Connection:
- 7/8 inch or 1 5/8 inch standard
- RF Output Impedance:
- 50 ohms unbalanced
- RF Load VSWR:
- XR3: 500 peak reflected watts 1.5:1 VSWR at 3 kW,
100% modulation - Frequency Range:
- 531 kHz to 1,710 kHz. Supplied, tuned and tested
to one frequency as specified - Frequency Stability:
- ±2 ppm; less than 4 Hz over temperature range
External GPS for increased stability - Modulation Type:
- Nautel Wideband Interphase Pulse
Duration Modulator - Modulation Capacity:
- XR3
155% positive peak modulation at 2.5 kW
145% positive peak modulation at 3 kW
120% positive peak modulation at 3.75 kW - Voltage:
- 180 Vac to 264 Vac, 3-ph., 50/60 Hz (standard)
- 312 Vac to 457 Vac, 3-ph., 50/60 Hz (optional)
- 180 Vac to 264 Vac, 1-ph., 50/60 Hz (optional)
- Spurious and Harmonic:
- Exceeds FCC, IC and ITU requirements
80 dB relative to carrier - AC INPUT
- Voltage:
- 200 to 260 V ac, 1 phase
50 Hz or 60 Hz to customer specifications - Power Supply Variation:
- ±10% voltage , 47 Hz to 63 Hz
- Power Consumption:
- XR3
3.0 kW typical at 2.5 kW, 0% modulation
4.5 kW typical at 2.5 kW, 100% modulation - 3.6 kW typical at 3 kW, 0% modulation
5.4 kW typical at 3 kW, 100% modulation - Power Factor:
- 0.85 typical, 1 phase
- ENVIRONMENTAL
- 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 3,000 m (0 ft to 10,000 ft)
- Cooling Air Requirements:
- 340 m³ /hr (200 CFM)
- PHYSICAL
- Dimensions:
- 184 cm H x 58.4 cm W x 80.5 cm D
(72.5” H x 23” W x 31.7” D) - Weight:
- XR3 - 217 kg (477 lbs)
- AUDIO PERFORMANCE
- Audio Input:
- 600 ohms balanced
+10 dBm nominal (adjustable from 0 dBm
to +12 dBm) - Frequency Response:
- +0.2 dB/-0.8 dB, 30 Hz to 10,000 Hz.
Referenced at 1 kHz, 95% modulation - Total Harmonic Distortion:
- Better than 0.8% (THD), 30 Hz to 10,000 Hz.
XR3
1.25% @ 1,250 W
1.5% @ 500 W (typical) - Intermodulation Distortion:
- 1.0% or less, 60/7000 Hz, 1:1 ratio
SMPTE standards at 95% modulation. - Transient Intermodulation Distortion:
- 0.5% at 80% modulation, 2.96 kHz/8 kHz,
30 kHz BW - Square Wave Overshoot:
- 1.0% or less at 400 Hz (100 μS risetime)
- Square Wave Tilt:
- 0.5% or less at 40 Hz
- Carrier Shift:
- 1% or less at 25, 50, 85 & 100% modulation
- Hum and Noise:
- -65 dB or better below 6 kW, 100%
modulation, 3 phase
-60 dB or bettter below 6 kW, 100%
modulation, 1 phase - DIGITAL COMPATIBILITY
- HD Radio™
- Compatible with NE IBOC - HD Radio
signal generator
Exceeds all regulatory requirements for
AM HD Radio operation - DRM:
- Compatible - Consult factory
- Notes:
- Specifications defined in a laboratory environment with high grade source and demodulation equipment. Standard factory measurement does not include all items.
