Medium Wave FIDELITY line

The RIZ FIDELITY is the newest line of RIZ's MW digital totally solid state transmitters in the power range 5 kW up to 2000 kW.

Transmitters are 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 transmitters smaller, more compact and more efficient than older generation MW transmitters.

RIZ's FIDELITY LINE transmitters are designed in accordance with IEC standards and ITU recommendations for this type of service.

 

MAIN FEATURES:

  • More than 90 % overall efficiency (typically 92%)
  • 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
Description Fidelity
10		 Fidelity
25		 Fidelity
50		 Fidelity
100		 Fidelity
200		 Fidelity
300		 Fidelity
400
General
Output Power (AM mode) 10 kW
with
135% positive peak
modulation		  25 kW
with
135% positive peak
modulation		  50 kW
with
135% positive peak
modulation		 100 kW
with
135% positive peak
modulation 		 200 kW
with
135% positive peak
modulation		 300 kW
with
135% positive peak
modulation		  400 kW
with
135% positive peak
modulation
Output Power (DRM mode)  6 kW 15 kW   30 kW  60 kW   120 kW 180 kW 240 kW 
Frequency Range 525 – 1605kHz
Frequency Stability ±2 x 10-7
AC
Mains
Input		 400 VAC 
±10% 3 Phase, 50 Hz 4 Wire
Power
Supply Variation		 -10% to
+10% voltage 50 Hz
Power Consumption 22 kVA 45 kVA 90 kVA 175 kVA 350 kVA    525 kVA 700 kVA
Transient Protection Meets IEC
587 requirements.
Power
Factor		 >  0.9
Audio
Input Impedance		 balanced input without
transformer (>20 kOhm or 600 Ohm internally jumper selectable)
Audio
Input Level		 -10 to +10
dBm,
adjustable in
0.5 dB steps
Mode of operation AM, AM with CCM, DRM, Simulcast
Overall Efficiency ≥ 85% ≥ 85%, typical 90% ≥ 88%, typical 90% ≥ 90%, typical 92% ≥ 90%, typical 92% ≥ 90%, typical 92% ≥ 90%, typical 92%
RF Output
RF Load Impedance 50 Ohm, unbalanced 50 Ohm unbalanced, 60 or 120 Ohm as option
Permissible VSWR Less than 1.5
Cabinet & Harmonics Meets CCIR
requirements.
Spurious Radiation Meets CCIR
requirements.
Audio Performance
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%.
Hum
And Noise		 -65 dB or
better below 100 % modulation (unweighted).
-70dB (Measured
with IEC – A weighted
filter)
Environment Conditions
Ambient Temperature 0° C to +
45° C
Altitude Up to 3000 meters.
Humidity Range 0 to 95%,
non-
condensing.