• Modular family ranges from 300 kW to 1200 kW
• Advanced digital audio processing
• Digital control unit coordinates signal processing required for translating baseband signal into AM band
• Direct digital synthesis generates output RF signal with digital precision
• Digital signal processing for carrier control and audio filtering
• Digital control for MOSFET switching transistors on RF amplifier modules
• Designed for digital transmission
• AES/EBU digital input-compatible with professional DRM front-ends and digital audio equipment

Power Amplifier Block

• Full accessibility
• Lowest space requirement
• Maximum service availability

7kW PEP plug-in power module

• Most powerful
• Highest efficiency
• No adjustment

RF Performance (Analog)
Carrier Output Power

• 300 kW to 1200 kW with the possibility to combine two transmitters to reach 2400 kW
• RF output power adjustment: Two preset levels: Full power and half power. One adjustable level [1% step]

RF Output

• Impedance: 120W unbalanced [please consult us for other values]
• Voltage Standing Wave Ratio: 1.2 : 1 at full rated output power
• 1.2 to 1.5: 1 automatic power reduction
• Harmonics and spurious radiations: Less than 50mW [CCIR rec 329-6]
• RF port lightning protection

Frequency
Frequency Range
MW band 531 kHz-1605 kHz / LW band: 153-281 kHz

Operating Frequency
Delivered tuned and tested for the customer operating frequency

Frequency Change
Standard: the transmitter can be easily set to another in-band frequency on site without major intervention

Frequency Source
Internal crystal oscillator [dual pilot with automatic switchover on demand]

Frequency Stability
< 1 x 10 E-9 per day / < 3 x 10 E-8 per month / < 1 x 10 E-8 within temperature range

Audio Modulation (Analog)
Modulation System
Advanced digital signal processing system

Type of Transmission

• Double Side Band [DSB] = A3E - DSB with full carrier
• Double Side Band with DCC = A3E with Dynamic Control Carrier 4 resident curves selectable for different program types. Similar systems of carrier reduction programmable on demand
• AM stereo and other phase/amplitude modulation with external processor

Modulation Capabilities
Carrier plus up to 125% according to model

Input Impedance
> 500W or 600W balanced within the audio range 30 Hz to 10000 Hz

Input Level
Nominal + 12 dBm for 100% sinewave modulation at 1000 Hz. Adjustable ± 12 dB in 0.1 dB steps

Frequency Response
+ 0.5/ - 1 dB from 40 Hz to 7500 Hz with 70% modulation

Total harmonic Distortion
< 2% from 40 Hz to 7500 Hz; - 1% from 100 Hz to 4500 Hz at 30% to 90% modulation

Intermodulation Distortion
With two equal 1000 Hz and 1180 Hz tones with 80% total modulation, 30 dB below either tone

Square Wave Tilt and Overshoot
Overshoot less than 1% at 400 Hz and 80% modulation. Tilt less than 2% at 40 Hz and 80% modulation

Unweighted Noise
< 60dB below level at 100% modulation at 1000 Hz measured within the audio range 40 Hz to 15000 Hz

Voltage Carrier Shift
< 1% for 100% modulation at 1000 Hz exclusive of primary power lines variations

Environmental Conditions
Indoor
+ 1°C to 45°C

Outdoor
- 20°C to + 45°C; 6.25% per 500m derating above 1000m [IEC 276]

Altitude
Up to 1000m [standard]; higher altitudes [on request]

Relative Humidity
< 95% non-condensing

Storage and Transport
- 40°C to ° 60°C [with all cooling fluids drained]

Mains Power Supply Stability
± 10% voltage, 50 or 60Hz ± 2Hz frequency

Power Conversion Efficiency (Analog)
Typical efficiency of 87% with standard cooling and 100% modulation

Operation
Local
From Local Control and Monitoring Panel [LCMP]

Remote
Via embedded web server facility

Personnel Safety
Meets EN 60215 [IEC 215]

EMC
To EC label requirements. Susceptibility: 30 V/m. Cabinet radiation: < 50 mW isotropic