20 mW terrestrial digital TV repeater

-Supports all standard digital TV, mobile TV signal transmission and gap-filling.

-Supports single spectrum and wideband (multi-spectral) amplification.

-The Equipment can be customized into optical input type, microwave input type and single frequency network delay adjustable type.

- All internal debugging points inside the product is controlled via microcomputers, after being equipped with GPRS module.

-support the remote debugging. Equipment operating information, fault information could be remotely-monitored via internet or mobile SMS in real time.

-The power amplifier use new generation LDMOS tube, it has the characteristics of high linearity, high efficiency, and more stable performance.

-The equipment currently has the largest range (40dB, maximum 50dB) super large range AGC control circuit to ensure the stable output power.

-It has high-precise ALC compensation function; the equipment can maintain the stable operation even if external environment changes sharply.

-it use unique original noise power compensation program to avoid environmental noise on the signal AGC power in small-signal input circumstance.

-it use algorithm with combination of digital and analog to achieve the output power adjustable in a continuous wide range.

It has interface for external battery backup power and photovoltaic battery.

-Protection against self-excitation: when self-excitation occurs, the repeater will be self-protect to avoid the damage to high-power amplifier.

- original input power too-small protection. The repeater gain may reach the maximum when main transmitting station or fiber-optical link is shut down for maintenance, if in this status, the main transmitting station or fiber-optical link operate normally, this will cause large instantaneous power to damage the power amplifier. this equipment combined the power too-small protection and nS level shutdown circuit to effectively solve the impact of this effect.

-equipped with output power too-large protection and output reflection too-large protection. User can set the corresponding protection points via the control panel or remote control.

-Super-fast impact protection for Pre-amplifier input overload power. Special rapid sampling and circuit shutdown can realize cut-off the link between pre-amplifier and power signal chain in nS level time period.

-Power Protection, once the power value deviate from the user settings range, the system will stop working.

-Equipment password setting. It can effectively improve the safety broadcasting of the equipments outdoors. can be equipped with optical receiver module to make the optical signal directly accessible to repeater.

-It can be equipped with the MMDS receiver module to make the equipment directly receive the microwave signal then converted to UHF signal for coverage.

Production Flow