Fidelity 25kW - product specification
|Power Output:||25 kW with 135 % positive peak modulation|
|Frequency Range:||525 kHz – 1605 kHz|
|Frequency Stability:||± 2 x 10-7|
|AC Mains Input:||
400 VAC ± 10 % 3 Phase, 50 Hz 4 Wire
(Other parameters on request)
|Power Supply Variation:||-10 % to +10 % voltage 50 Hz|
|Transient Protection:||Meets IEC 587 requirements|
|Power Factor:||> 0.95|
|Audio Input Impedance:||
balanced input without transformer
> 20 kΩ or 600 Ω internally jumper selectable
|Audio Input Level:||- 10 to + 10 dBm, adjustable in 0,5 dB steps|
|RF Load Impedance:||50 Ω, unbalanced|
|Permissible VSWR:||Less than 1.5|
|Cabinet & Harmonics:||Meets CCIR requirements.|
|Spurious Radiation:||Meets CCIR requirements.|
|Overall Efficiency:||≥ 88 %, typical 90 %|
|Audio Frequency Response:||± 1 dB, 30 Hz to 10 kHz.|
|Total Harmonic Distortion:||0.8 % or less at 95 % modulation, 30 Hz to 10 kHz|
|Carrier Shift:||Less than 1%.|
|Inter Modulation Distortion:||
< 1 % at 60 / 7000 Hz, 4 : 1, at 95 % modulation
as per SMPTE standards.
|Hum And Noise:||
-65 dB or better below 100 % modulation (unweighted).
-70 dB (Measured with IEC – A weighted filter)
|Ambient Temperature:||0 ºC to 45 ºC|
|Altitude:||Up to 3000 meters.|
|Humidity Range:||0 to 95 %, non-condensing.|
|MTBF / MTTR||10000 h / 15 min|
The RIZ FIDELITY 25 is members of the newest RIZ's MW DIGITAL totally solid state transmitter family, having the
output power 25 kW.
Transmitter is capable for standard amplitude AM, digital DRM or SIMULCAST modes of operation. The operating mode is changed by pressing a button on the touch screen main menu.
The DRM Exciter / Modulator is integrated in the transmitter.
Multifunctional touch screen menu enables controlling of the transmitter and monitoring of all relevant parameters.
Power amplifiers are designed as plug-in hot swappable broadband units, without needs for tuning over the entire MW band, with integrated supervision and protection circuits.
The new approach in mechanical design and the out-phasing modulation principle makes the RIZ FIDELITY 25 smaller, more compact and more efficient than older generation MW transmitters.
This transmitter, as well as all other RIZ's FIDELITY LINE transmitters in the power range 6 kW up to 2000 kW, is designed in accordance with IEC standards and ITU recommendations for this type of service.
- More than 87 % overall efficiency (typically 90%)
- AM, AM / CCM, DRM, Simulcast operating modes
- DRM Exciter / Modulator integrated in the transmitter
- Tunable over the entire MW band
- FM-like audio performance
- Modular design
- Large Touch Screen Display
- User friendly control and monitoring
- Remote control for unattended operation