Head station for cable TV HS-02

FEATURES:

• work on adjacent channels;
• quartz frequency stabilization;
• high output level;
• low out-of-band emissions;
• stabilization of the output level;
• one supply voltage;
• modular design (8 modules and power supply);
• independent reprogramming of input and output channels in each block;
• merging by the method of “feed totalization”;
• compatibility with analog coding systems.

Converter TK-14M2:

It is intended for retransmission of programs of on-air television over KTV networks. The converter is built according to the scheme of triple conversion of the frequency of the input signal. High selectivity on the adjacent channel, low level of out-of-band emissions is provided by application of two SAW filters on the 38 MHz IF, two SAW filters on the 960 MHz IF and the use of high-linear GaAs-based technologies. To maintain the stability of the output level, an AGC system is used in the converter. The entire device is controlled by the built-in controller.

Modulator M-15M2:

It is intended for transferring low-frequency signals of video and sound from various devices to the range of meter and decimeter waves for the subsequent transmission of them to the cable television networks. The modulator is constructed according to the scheme of triple conversion of the frequency of the input signal. High suppression of out-of-band emissions at the output is provided by using two filters of surface acoustic waves on a frequency converter of 38 MHz, two filters of surface acoustic waves on a frequency converter 960 MHz and using high-linear converters based on GaAs technologies. To maintain a given depth of modulation, an automatic gain control system is applied to the video input. The modulator has the ability to programmatically change the frequency of the subcarrier of sound, the ratio of sound and image carriers, to disable automatic gain control from the video input to ensure compatibility with encoders of encoding systems. These functions are performed using the external control panel CU-02. In standard delivery, the modulator is programmed for D / K, OIRT.