TV Transmitter

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Features:

  • VHF/UHF 1kW Solid-State TV TransmitterWith all-solid-state circuit design and combined transmission of video/audio carrier, convenient to upgrade to digital TV transmitter.
  • With dual professional TV exciters for optional demands and advanced RF non-linearity correction technology are able to guarantee the reliability and stability of TV signal transmitter and low transmitting signal distortion. The hot-plug power units could backup each other, ensure that there is no single fault of transmitter.
  • New type output filter (low-pass or band pass available).With adopted high-power synthesis technology, low insertion loss, high out-of-band suppression.
  • Local or remote control, friendly man-machine interface by microcomputer unit, it can display and control the operating mode of exciters, power amplifier units and transmitter, with GSM message auto alarm module, and fixed timing starting up and shutdown functions.
  • With self intellectual property rights. Develop power amplifier, power combiner, monitoring system independently.
  • Wide voltage stability range and high efficiency of power supply.
  • With over-voltage, over-current, over-heat, over-excitation, low-voltage, absent-phase, short-circuit and over-VSWR auto-protective functions; with multiple-measure of thunder-proof, it could run securely.
  • Forced-air-cooling design with low power consumption and low noise.
  • All technical specifications can meet or exceed the national and ministry standards.

 

VHF

UHF

Rated Output Power

1KW

RF Specifications

Television Standards

PAL-D or other standards

Frequency Range

VHF Ⅰ, Ⅲ

(Select one channel)

470MHz~806MHz ( Select one  channel)

Video/Audio Ratio

10:1

Output Impedance

50Ω

Output Interface

L16,”N”type

Frequency Stability

±1KHz/3months

Output Power Variation

±0.25dB

Inside-band Inter-modulation

≤-52dB

Stray Output In Adjacent-channel

≤-60dB and ≤1mW

Stray Output Out Adjacent-channel

≤-40dB

Video Specifications

Input Level

1 Vp-p

Input Impedance

75Ω

Input Return Loss

≥30dB(0MHz~5.5MHz)

Modulation Mode

AM, negative polarity

Percentage of Modulation

≤87.5%

Field-time Waveform Distortion

≤3%

Line-time Waveform Distortion

≤3%

2T Sine-squared Pulse Distortion

≤3%

Luminance Non-linearity Distortion

≤12%

Blacking Level Variation

≤±3%

Differential Gain

±8%

Differential Phase

±7°

C/L Gain Inequality

≤15%

C/L Delay Inequality

±40ns

Stochastic Sundry Wave S/N Ratio

Root-Mean-Square Value, unweighted: ≥48dB

Root-Mean-Square Value, weighted: ≥56dB

Periodic Disturbance S/N Ratio

Peak-to-peak value: ≥48dB

Audio Specifications

Input Level

0dBm±6dB

Input Impedance

600Ω (Bal.) or  ≥2KΩ (Unb.)

Modulation Mode

FM

Pre-emphasis

50μs

Frequency Deviation

±50KHz

Harmonic Distortion

≤1%(30Hz~15KHz)(100% Modulated)

Amplitude-Frequency Characteristic

±1.5dB(30Hz~15KHz, pre-emphasis:50us)(50% Modulated)

FM S/N Ratio

≥58dB (1KHz,100% Modulated)

AM Noise

≤-46dB (Unmodulated)

Inner-carrier Noise

≤-40dB (100% Modulated)

Sync parasitic Am Modulation S/N

≥40dB

Video to Audio Intermodulation

≤10%

Environmental Factors

Working Temperature

-10~+45℃

 

Relative Humidity

<95%(No condensation at 25℃)

 

Atmosphere Pressure

86~106Kpa

 

Cooling

Forced air cooling

 

Power Supply

single phase;AC;220V\±20%;50Hz±10%

 

Machine Room

≥24h

 

Dimensions

Few dust, No oscillation and impact

 

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