- Transmitter - Medium Wave 25kW
Medium Wave SD line 25kW - product specification
| OR 25 SD - TECHNICAL DATA | |
| OPERATING CONDITIONS: | |
| Power Supply | |
| Main voltage | 3 x 400 V +5 %, -10 %, 4 wires |
| Power input (fm=1kHz/m=1) | 49,3 kVA |
| Mains frequency | 50 Hz or 60 Hz (as option) |
| Power factor | ≥ 0.95 |
 |
|
| Modulator input | |
| Input impedance | 2000 Ω balanced, standard, 600 Ω balanced, optional |
| Input level(for frn=1kHz,m=1) | - 4 dBm + 10 dBm, adjustable in 0.5 dB(0 dBm = 0.775 V across 600 Ω) |
|
|
| Transmitter Output | |
| RF output load impedance | 50 Ω unbalanced, standard, 1-5/8“ EIA Flange 60 Ω unbalanced, optional |
| Permissable VSWR | s < 1.50 |
|
|
| Environmental Conditions | |
| Temperature in transmitter hall | +1 to +45°C |
| Max. altitude above sea level | 2000m |
| Relative humidity | <95%, non condensing |
|
|
| ELECTRICAL CHARACTERISTICS: | |
| Frequency range | 525 kHz – 1605 kHz |
| RF Output Power | 25 kW |
| Frequency stability | ± 10 Hz, ± 2 Hz at typical conditions |
| Frequency source | DDS Synthesizer |
| Modulation principle | Pulse Duration Modulation |
| Postive peak modulation capability |
125 % |
|
|
| Signal to Noise Ratio and Spurious Emission | |
| Unweighted | > 60 dB, Reference level m = 100 % fm=1 kHz sine, mains voltage sine |
| RF Harmonic and Spurious Emission |
< 50 mW (according to ITU) |
|
|
| Carrier Shift and Overall Efficiency | |
| Carrier shift at m = 90 % with fm = 1 kHz | |
| sine-shaped and at constant mains voltage referred to the unmodulated carrier < 1 % | |
|
|
| Overall Efficiency | |
| > 80 % | |
|
|
| Audio characteristics | |
| Amplitude-Freq. Response 30 Hz to 10 kHz | ± 1 dB |
| Nonlinear Distortion 30 Hz to 10 kHz | < 1 % |
| The ratio of input to output as a function of modulation depth up to m = 80 % does not differ by more than |
± 0.5 dB |
|
|
Transmitter 25kW
25 kW MW Broadcast Transmitter OR 25 SD
The RIZ OR 25 SD is a member of the new series of RIZ totally solid state transmitters.
Reliable solid state technology provides enhanced overall efficiency and exceptional audio performance.
This RIZ solid state SD series continues a tradition of providing broadcasters superior value, performance and long term reliability.
The transmitter incorporates multiple protection systems which prevent failures due to atmospheric and man-made transient sources.
A maximum safety for operating and for the maintenance personnel is provided in compliance with the IEC 215 safety standards.
This transmitter, as well as all other RIZ transmitters, is designed in accordance with the IEC standards and ITU recommendations for this type of service.
- Dual exciter section
- Frequency agility (max tuning time 2 min)
- Simple cost effective maintenance
- Solid state hot-swap modules
- FM-like audio performance
- High overall efficiency
- Compact design
- Microprocessor, DSP and EPLD technology
- Mobile or stationary versions available
- Digital broadcasting compatibility (DRM)
