Digital television transmitter broadband detection implementation system and method

Abstract

The invention provides a digital television transmitter broadband detection implementation system and method, and relates to a broadcasting transmission field. The digital television transmitter broadband detection implementation system comprises a radio-frequency digital-control attenuator, a radio frequency power detector, an operational amplifier, an analog-to-digital converter, a micro-processor and a micro-controller, wherein the micro-processor is connected with the micro-controller through a parallel data line or 12C bus in an FPGA mode, thereby obtaining calibration data; the micro-controller transmits data in an RS458 multi-computer communication or broadcasting mode. According to the digital television transmitter broadband detection implementation system and method, in a hardware and software combination mode, accuracy of broadband detection can be largely improved, errors of the broadband detection are reduced, and finally an excellent effect of transmitter control stability is implemented.

Description

technical field [0001] The invention relates to the field of broadcast transmission, and relates to a broadband detector of a digital TV transmitter, which is applied to the radio frequency detection of the digital TV transmitter. The detector can meet the radio frequency detection of 13CH-48CH, and the power indication range is 0W-5000W. It can guarantee the linearity and accuracy of detection within the above two ranges. Background technique [0002] In an all-solid-state digital TV transmitter, the radio frequency detection of the transmitter is related to the human-computer interaction, control, and stability of the transmitter. In the past, the detection of the transmitter was through the detection diode or the detection chip to convert the radio frequency into a DC voltage and directly send it to the main control for display and control. However, due to the unsatisfactory broadband characteristics of the transmitter directional coupler, or the detection diode The unsa...

AI Technical Summary

Problems solved by technology

In the past, the detection of the transmitter was through the detection diode or the detection chip to convert the radio frequency into a DC voltage and directly send it to the main control for display and control. However, due to the unsatisfactory broadband characteristics of the transmitter directional coupler, or the detection diode The broadband characteristics of the chip and the detector chip are not ideal, which often brings many problems to the broadband characteristics of the transmitter, resulting in unstable control of the transmitter, which cannot meet the application of 13CH-48CH

To solve this problem, the software is used to compensate the inaccuracy of broadband detection caused by the lack of devices.

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