[SBE] STL

[Gary O'Guinn]

One last thought.
Several years ago we were having a problem with intermittent 
interference with our C-Band antenna. It appears to have been caused by 
a radar altimeter at Anchorage International Airport. We put some 
terrestrial interference filters in the feed assembly of the C-Band 
antenna (before the LNBs) and that fixed it. I realize there is a *large 
*difference in frequency from 950 MHz to C-Band down-link frequency; 
but  maybe you might have a lower harmonic of some radar, or satellite 
uplink station? Also throwing in my 2-cents worth.

Gary O'Guinn
KTUU-TV

William Whitt wrote:

>

> I would lean considerably to an Interference issue. I'm not a FM guy, 

> but I have receivers that have alarms set for just the amount of loss 

> that you are experiencing. If I have a 20dB loss in my receive side 

> ... It gives me a Audio Loss error. Not so much the loss of the 

> Carrier, but an actual loss of the total modulation for the receive 

> side. If you are running in Stereo -- this may indicative of losing 

> one of the stereo channels.

>

>  

>

> Just my 2 cents worth,

>

>  

>

> Bill

>

>  

>

> *From:* sbe-bounces at sbe.org [mailto:sbe-bounces at sbe.org] *On Behalf Of 

> *A9xw at cs.com

> *Sent:* Monday, July 20, 2009 11:31 AM

> *To:* sbe at sbe.org

> *Subject:* Re: [SBE] STL

>

>  

>

> Sitemaster showed no antenna problem, and it does not coincide with 

> any mechanical movement. Its there 100% if I connect the antenna to 

> the SL9003Q but not a problem if I connect via the Lanlink box.  I 

> suspect an interference problem, since the Lanlink has a lossy 

> bandpass filter.  the site is 55 miles from the metro center and very 

> little RF from any source for miles.  Most RF is from my 1008' TV 

> tower 2.8 miles away. The other on site STL RX is a Harris CD link.

>

> Henry

>

> Checked by AVG - www.avg.com

> Version: 8.5.375 / Virus Database: 270.13.20/2250 - Release Date: 

> 07/20/09 06:16:00

>

> ------------------------------------------------------------------------

>

> _______________________________________________

> The SBE Roundtable, SBE at sbe.org

> To unsubscribe, go to http://seven.pairlist.net/mailman/options/sbe

>

> http://seven.pairlist.net/mailman/listinfo/sbe

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://seven.pairlist.net/pipermail/sbe/attachments/20090720/0a8c06b1/attachment.html>