Apparance: 

Main Features:

n 470--860MHz broadband response and low noise design

n Design of low power consumption and linearization advances emitting power of the transmitter and reduces nonlinear distortion.

n Very low group delay feature, suitable for digital signal transmission.

n ALC keeps output of constant power, output VSWR detecting protection

n Apply to single-channel or multi-channel UHF digital television transmission system

n Be used in the broadband repeating of HFC, AML, or MMDS digital TV signal

n Realize wireless network coverage of digital TV at a low cost.

n Modular design simplifies installation, field services and upgrade.

n Automatic and manual switching backup systems available.

n Build-in lightning protector with current-dividing series power prevents lighting surge and instant overvoltage.

n Local monitoring and control.

n Wireless remote monitoring and control (Optional)

 

Technical  Specifications:

 Typical Application:

nUsed in broadband frequency transmission of terrestrial digital television transmission system

nMeet the 30 km radius of signal coverage in 4-channel application (National standard GB single-carrier system)

 Wide-band frequency  transmitter performance characteristics

 In addition to meet the general requirement of the national standard terrestrial digital TV transmitter, the Wide-band frequency  transmitter should have the following characteristics:

 

I.    Wide-band frequency  response and low noise design

Transmitter adaptive frequency bandwidth≥120MHz. Within the frequency bandwidth range, the transmitting frequency point can be adjusted freely at any time without affecting the overall transmitter performance. On the system Wide-band frequency  transmitting status, the spectrums shoulder distance @ fcenter±4.2MHz≤-40dBc,(fcenter±64MHz)≤-32 dBc. The equipment noise figure≤6 dB.

 

 II.   Modular structure, the power amplifier module hot plug design, to facilitate onsite equipment maintenance.

Balanced coupling structure, without the power combiner. On the multiple group power amplifier modules status, one group power amplifier module can be hot-swappable, in addition to lower transmission power, the machine performance doesn’t be affected.

 

III.   The Power is measured by the output port full digital power. The equipment power should not be measured by 1dB Gain compression point output power. The equipment total power efficiency should not be less than 18%.

 

IV.   Frequency stability < 5×10-8(Using an internal reference source), < 5×10-11(using an external reference source), meet the needs of Wide-band frequency  adjacent channel transmitting.

 

V.    Meet the transmitting coverage needs in different power levels, having the high-power Wide-band frequency  transmitter type which digital power no less than 800W.