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Saturday 23.11.2024 / 02:05
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afterdawn.com > forums > home theater > digital tv - united states & canada > how to find signal for mmds
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How to find signal for MMDS
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mgb17
Senior Member
_ 		19. November 2008 @ 15:10 _ Link to this message    Send private message to this user   
First you should check if you really got a downconverter with if214.
Satandcable sold different ones in the past.
Next you should check the polarity. The downconverter specially the head has to be mounted horizontally or vertically.
If you installed the downconverter in the right direction do a manual scan at 234mhz or 242mhz for a downconverter with if214 and check signal strength/quality and align your aerial with help of the bars.
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irishman7
Newbie
_ 		30. November 2008 @ 15:30 _ Link to this message    Send private message to this user   
Originally posted by mgb17:
 First you should check if you really got a downconverter with if214.
Satandcable sold different ones in the past.
Next you should check the polarity. The downconverter specially the head has to be mounted horizontally or vertically.
If you installed the downconverter in the right direction do a manual scan at 234mhz or 242mhz for a downconverter with if214 and check signal strength/quality and align your aerial with help of the bars.

Thanks mgb17
Have verified downconverter if214
Have only got a chance to work at this today since last post.
As of now when I do a manual scan at 242mhz I'm getting signal strength of approx. 83% and quality of approx 25% no matter how I adjust I cannot improve quality anyone have any ideas
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mgb17
Senior Member
_ 		30. November 2008 @ 21:23 _ Link to this message    Send private message to this user   
Either the downconverter/feedarm is adjusted with the wrong polarization or you get too less signal strength from your aerial.
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irishman7
Newbie
_ 		1. December 2008 @ 15:27 _ Link to this message    Send private message to this user   
Originally posted by mgb17:
 Either the downconverter/feedarm is adjusted with the wrong polarization or you get too less signal strength from your aerial.

Thanks again mgd17
By polarization do you mean downcoverter in either horizontal or vertical position as I have checked both and only get a signal on horozontal. If aerial is the problem is it possible to amplify. There are several identical aerial setups in my locality so I would be confident of a solution eventually.
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irishman7
Newbie
_ 		1. December 2008 @ 17:32 _ Link to this message    Send private message to this user   
Also I connected aerial with downconverter directly to rf input of tv and searched found BBC1 and Boomerang with perfect reception and a few others with poor reception.
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mgb17
Senior Member
_ 		1. December 2008 @ 18:51 _ Link to this message    Send private message to this user   
Are you sure the powerinserter for the downconverter is fully working.
Btw a short circuit anywhere in the cable run is also not so good.
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irishman7
Newbie
_ 		3. February 2009 @ 08:53 _ Link to this message    Send private message to this user   
Just thought I'd leave some feedback. I did not do any more work on mmds setup over xmass due to weather and work. I had a day to myself yesterday and did some faultfinding. Result was power inserter. Power inserter was giving 18V at downconverter but when I tried to power 12V 15W bulb it would not supply enough power. I replaced another power inserter and everything perfect no adjustment needed. Thank you to all who gave me advice
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