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10KW UHF Television Transmitter Configuration List
Main Parts | Configuration Quantity | Specification |
Exciter | 2 set | The exciter is advanced JHV-10 exciter |
Final PA | 12 sets | Each Groups Peak Value Power 1000W |
Switch Power | 10 set | 42V/2500W |
Main Controlling System | 1 set | Computer Monitoring System and Monitoring Software |
Cooling system | 2 set | DF Model Centrifugal Air Blower |
Machine cabinet | 1 sets | 1997mm (Height) ×1470mm (Width) ×1100mm (Depth) |
The backup redundant design of main parts of transmitter, and eliminate single point of failure, and it can achieve the zero shutdown rate of single machine.
Use hot-swap technology, it can be replaced with the amplifier module or power supply without power off, it is easy to repair and maintenance, MTTR short. The exciter is advanced JHV-10 exciter, with multiple pre-correction functions such as DG and DP, as well carries out carrier frequency precise bias. The module has self-diagnosing functions, to display and read various technical parameters on LCD (Liquid Crystal Display). Switch constant voltage power with parallel share current, high reliability. Use GYSEL synthesizer, this synthetic technique can bear great power, and high reliability. Intelligent control system, the transmitter has computer interface, and can be connected with the remote computer, the computer monitoring software can make use of the management and monitoring of computers to realize the intelligent and network. The sound protective system, guarantee the high reliability, multiple protection (Over-voltage, over-current, over heating, the standing wave ration, lightning prevention etc.) measures, and to protect long MTBF. The cooling system adopts the forced air-cooled, in-house low noise centrifugal fan. Effectively lower the temperature of amplifier module, enhance the reliability of the whole machine, and reduce the whole machines noise.2.1 General Performance Parameter |
TV Standard : PALD or conform to the requirements |
Frequency Scope: 48.5-223MHz/470-870MHz |
Rated Output Power: 10KW (Peak Sync) |
Image Modulation Degree: ≤87.5% |
The difference of Sound Carrier Frequency and Vision Carrier Frequency: 6.5±0.001MHz |
Vision Carrier Frequency Stabilization: 300Hz/month |
Radio Frequency Output: 1-5/8 or L27 |
Vision/sound Power Ration: 10:1 |
Nominal Load Impedance:50Ω (Same Axis) |
Power Consumption: 20KVA |
2.2 Image Perform |
Frequency Stabilization: superior ±300Hz/month |
Light-intensity nonlinear: ≤10% |
Amplitude Frequency Characteristics |
Relative to Vision Carrier Frequency: See table 1 |
Group delay-frequency characteristics |
The largest limited scope is ±50ns; when comes to 4.43MHz, it is ±30ns ance Parameter |
Video Input Level: 1Vp-p normal polarity (Synchronizing Pulse 0.3 V) |
Video Input Impedance: 75Ω (Same Axis) |
Differential Gain Distortion: ≤5% |
Differential phase distortion: ±40 |
Second-harmonic output: ≤-60dB |
Periodic clutter Signal-to-clutter ratio: (≤1KHz):≥50dB |
Continuous random wave signal-to-noise ratio (10KHz6MHz): :≥50dB |
Luminance/brightness gain inequality: ≤5% |
Luminance/brightness delay inequality: ±30ns |
Field frequency square wave: ≤2% |
Linear frequency square wave:≤2% |
2T Pulse: ≤2% |
2.3 Sound Performance |
Frequency Stabilization: superior to ±300Hz/month |
Frequency Offset: ±50KHz (100% modulation) |
Video Input Level: 0±6dBm |
Video Input Impedance: 600Ω (balance) |
Amplitude-frequency response: ≤±1dB(30Hz15KHz) |
Pre-emphasis time constant: 50μs |
Frequency Modulation Noise: ≤-60dB |
Harmonic Distortion(Frequency Offset 50KHz): ≤1%(30Hz15KHz) |
Cross Modulation Distortion: ≤10% |
2.4 Environment Condition |
Temperature: 0+35 |
Relative Humidity: ≤95%(25) |
Atmospheric Pressure: 86106KPa |
Power Supply: 3´380VAC(±15%), Frequency: 50Hz±2Hz |
f(MHz) | -4.43 | -1.25 | -0.75 | -0.5 | 0 | +1.5 | +3 | +4.43 | +6 | ≥+6.5 |
Upperlimit(dB) | -30 | -20 | +0.5 | +0.5 | +0.5 | 0 | +0.5 | +0.5 | +0.5 | -20 |
Lowerlimit(dB) | -∞ | -∞ | -4 | -1.5 | -1.5 | 0 | -1 | -1 | -4 | -∞ |
10kw UHF/VHF TV transmitter
