X.DA-25
25 kW AM Transmitter25 kW AM transmitter from the X.DA series. High-performance redundant modular design in a dual 19" rack cabinet. DDS carrier generation, HD Radio® and IBOC compatible. Local and Ethernet remote control. Full digital protections: VSWR, overcurrent, over-temperature and overvoltage.
The X.DA-25 is a 25 kW solid-state AM transmitter for national broadcasters and large-footprint regional stations. Mounted in dual 19-inch rack cabinets, it groups 28 independent 1 kW power stages that can each be replaced individually without specialist tools, reducing corrective maintenance downtime. DDS carrier synthesis provides exceptional frequency stability, and Ethernet remote control, scheduled power management, and event logging are standard. Digital protection circuits — VSWR, overcurrent, overtemperature, and supply overvoltage — operate continuously. HD Radio® and IBOC compatible.
Technical Specifications
| Carrier power | 25 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 | EIA 1-5/8" |
Power Supply
| Voltage / Phases | Max. current | Consumption |
|---|---|---|
| 220/110 V 3φ | 125 A | 50 kVA |
| 380/220 V 3φ | 70 A | 50 kVA |
(*) At 100% modulation, 50–60 Hz. Tolerance ±5 %, ±10 %.
Physical & Environmental
| Dimensions (W × H × D) | 1100 × 1840 × 872 mm |
| Net weight | 960 kg |
| Operating temperature | 0°C – 50°C |
| Relative humidity | 0 – 95% |
| Operating altitude | up to 3,500 m a.s.l. |