The fourth digital tv transmitter: 1. Full modular 2. Pre-distortion correction technique 3. LDMOS 4. Local/remote monitor
KFS-Ⅱ series digital TV transmitter, is the fourth generation of terrestrial digital broadcasting TV transmitting equipment.
Main Features:
1. Supports MFN and SFN modes, SFN mode compliant with GY/T 229.1-2008.
2. All-solid-state with modularization structure.
3. Dual exciter systems, the active and reserve exciter can be switched manually or automatically. Keep consistent work state when switching;
4. Adopts advanced adaptive pre-distortion correction technique, big correction value, improved transmitter parameters and efficiency;
5. Adopts advanced LDMOS as power amplify tube, better index, higher efficiency and smaller bulk.
6. Independent designed cross coupling 6-cavity filter, the output spectrum meets China standard;
7. Transmitter has multiple protection measures against losing lock, overheating, standing wave, inter lock and overloading to ensure stable work status.
8. Local/Remote monitoring and On/Off schedule for unattended operation;
9. Embedded microcomputer monitor system, large color LCD touch screen, to ensure real-time monitoring of the transmitter.
10. RS485 interface for remote metering and remote control;
11. Optional air cooling or water-cooling, for different station requirements.
Main Technical Parameters:
Item | 50W/100W/200W | 300W/500W | 1KW | 2KW | 3KW |
Output power | 50W/100W/200W | 300W/500W | 1KW | 2KW | 3KW |
Work Frequency | any channel within UHF TV band | ||||
Modulation standard | DTMB, DVB-T, DVB-T2 (optional) | ||||
Minimum frequency stepping | 1Hz | ||||
Frequency stability (three months) | Internal reference source: ≤5X10-8 External reference source: ≤1X10-10
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Frequency accuracy | MFN mode: ±50Hz SFN mode: ±0.05Hz | ||||
Local oscillator phase noise | <-60dBc/Hz@10Hz; < -75dBc/Hz@100Hz; < -85 dBc/Hz@1kHz; < -95dBc/Hz@10kHz; < -110 dBc/Hz@100kHz; < -115dBc/Hz@1MHz | ||||
Output power stability (after filtering) | ±0.5dB | ||||
Spectrum mask | compliant with out-of-band spectrum mask standard in GB20600-2006 | ||||
Return loss of output load (within 8MHz) | normal work: ≥26dB; allowable work: ≥20dB
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Shoulder (fc±4.2MHz) | ≤-37dBc (before filtering) | ||||
In-band unevenness (fc±3.591MHz) | ±0.5dB
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Modulation Error Rate | ≥32dB | ||||
Useless transmit power in adjacent channel | Ratio of useless transmit power in adjacent channel with in-band transmit power≤-45dB Transmit power in adjacent channel≤13mW
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Useless transmit power out of adjacent channel | Ratio of useless transmit power out of adjacent channel with in-band transmit power≤-60dB Transmit power out of adjacent channel≤13mW | ||||
Environment requirements | Environment temperature: 0°C~45°C Relative humidity: ≤95%(No condensation) Atmospheric pressure: 86~106KPa Work Voltage: three-phase AC 380V±10%, 50±2Hz | ||||
Dimension | 563MM (W) x 337.5MM (H) x 514.5MM (D) | 563MM (W) x 960MM (H) x 750MM (D) | 586MM (W) x 1650MM (H) x 970MM (D) | 775MM (W) x 1650MM (H) x 1100MM (D) | 586MM (W) x 1650MM (H) x 1050MM (D) |
Digital TV Transmitter
