X.DA-3
3 kW AM Transmitter3 kW AM transmitter from the X.DA series, designed for regional coverage broadcasters. Redundant modular architecture with four independent 1 kW PB-1000W power modules. Dual-circuit DDS carrier generation for service continuity. High-efficiency Class D PWM modulation. Available in single-phase (220 V) or three-phase (220/380 V) configurations.
The X.DA-3 is a 3 kW solid-state AM broadcast transmitter built for regional and community radio stations. Its modular design — four independent 1 kW power stages — simplifies maintenance: when a module fails it is easily identified and replaced without specialist tools, minimizing off-air time. Class D PWM modulation with HEXFET transistors and DDS carrier synthesis deliver over 85% efficiency, significantly cutting electricity costs compared to older tube-based designs. HD Radio® and DRM compatibility makes the X.DA-3 a future-ready investment as AM digital broadcasting continues to grow.
Technical Specifications
| Carrier power | 3 kW |
| Power reduction | 4 pre-set adjustable levels |
| Frequency range | 535–1705 kHz |
| Frequency stability | ± 5 Hz |
| Load impedance | 50 Ω (VSWR ≤ 1.6:1) |
| Audio input | +10 dBm at 100% modulation / 600 Ω balanced |
| Frequency response | ± 1 dB, 20–15,000 Hz |
| Harmonic distortion (THD) | < 1% at 95% modulation |
| Intermodulation distortion | < 2% (60 Hz – 7 kHz, 2:1) |
| Carrier shift | < 1% |
| Signal-to-noise ratio | ≥ 62 dB |
| Spurious radiation | ≤ −80 dB |
| Modulation capacity | > 130% positive peak |
| Efficiency | 85% under normal operating conditions |
| Power factor | 0.95 ind |
| Output connector | Type N / Clamp |
Power Supply
| Voltage / Phases | Max. current | Consumption |
|---|---|---|
| 220 V 1φ | 32 A | 7 kVA |
| 220/110 V 3φ | 20 A | 7 kVA |
| 380/220 V 3φ | 16 A | 7 kVA |
(*) At 100% modulation, 50–60 Hz. Tolerance ±5 %, ±10 %.
Physical & Environmental
| Dimensions (W × H × D) | 550 × 880 × 820 mm |
| Net weight | 167 kg |
| Operating temperature | 0°C – 50°C |
| Relative humidity | 0 – 95% |
| Operating altitude | up to 3,500 m a.s.l. |