What is Encoder-modulator? | soukacatv.com

What is ENCODER? In Telecommunications, it is a device used to  change a signal or data into a code.

What is MODULATOR? In Telecommunications, it is a device to  transfer a digital bit stream over a bandpass channel.

In traditional digital cable system, one encoder requires one modulator, or with the help of multiplexer, several encoders go with one multiplexer and one digital modulator. But this is no the smart way for hotels or hospitals in cost and setting up the system. What people  really wants is a device integrated the encoder and modulator into  one and simply without much unnecessary setting. And that is what  we gonna do.

Our SK-860** is a new generation encoder modulator designed for the subscribers who want simple and quick  roll-out. It only takes 3 steps to set up a private cable system.

And comparing to the traditional system, SOUKA's SK-16D ( 16 IN 1 ENCODER-MODULATOR HEADEND ) only takes a small place in the rack and less power consumption. And most importantly, it is less $2,000 than the old system. Come and inquire now via ken@soukacatv.com

The Difference Between DVB-T And DVB-T2

Source: https://www.soukacatv.com/what-is-encoder-modulator_n8

Trouble Shooting on Analog TV System | Soukacatv.com

Trouble Shooting

Any system can be make or break the entire installation. I have been dealing with the complaint on modulators but most of the time the problem comes from the other part of system. And this is why I going to tell you in the following words.

Golden Rule : Always check the connections before you blame the equipments.

1. Herringbone in TV

Disconnect modulator from local channels and check modulated channel. If there is programming move the modulated channel. If the picture is snowy, use a low pass filter to block noise or data coming in from cable.

2. Horizontal Bars Rolling Through TV Picture

2.1. Check for a component of the system that is introducing DC power into the system. Disconnect that component and check TV. If the hum bars stop, use a DC blocker down stream from that component to block the power from getting to the TVs

2.2 If the rolling is only on the modulated channels, check for impedance mismatch by adjusting the video level adjustment pot.

3. Vertical Bars Rolling Through TV Picture

Check for AC power getting on the line. Use a ground breaker in line.

4. Black and White Lines on one Local Channel

Move modulated channel up to a new channel. If problem persists and all of the inputs of a multiple input modulator are not being used, check default channels on modulator to see if default channel is set to the same channel that the problem channel is.

5. Ghost on the Picture

5.1 Check for low quality combiner/spitter in system. Replace with high isolation combiner/splitter.

5.2 Check the type of coax used in system. Inadequate shielding in coax will cause ghosting.

6. Snowy Picture

6.1 Verify the modulator is set up for the proper TV channel band.

6.2 Verify the TV is set up on the proper TV channel band.

Source: https://www.soukacatv.com/trouble-shooting-on-analog-tv-system_n12