Trouble Shooting on Analog TV System from 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.

Dingshengwei Electronics Co., Ltd

(DSW) is dedicated to design, manufacture and sales of CATV analog & digital headend with our brand name SOUKA. DSW obtained ISO9001:2008 certificate authorized by CQC. We have 100 in-house skillful workers, which ensures the punctual delivery date. And a professional engineer team made up of 10 senior RF engineers and 6 IT engineers to fulfil precise management over all projects honored by our customers.

As one of the most reliable suppliers in this field, we continually spare no efforts in developing DSW into a world recognized brand with trustworthy and solid reputation. DSW sincerely invites you to enjoy the fascinating experience of modern technology and excellent customer service provided for you by our professional staff.

Our main products are modulators both in analog and digital ones, amplifier and combiner. We are the very first one in manufacturing the headend system in China. Our 16 in 1 and 24 in 1 now are the most popular products all over the world.

In 2016,we launched the digital 16 in 1 headend with 1080P output,which supports all digital TV standards in the world. And we never stop our steps,more products will be released in the coming days. We are young but we have faith to find our path to the peak.

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

Established in 2000, the Soukacatv.com (Dsw) main products are modulators both in digital and analog modulators,amplifier and combiner.https://www.soukacatv.com/.