Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




441 posts

Ultimate Geek
+1 received by user: 1


Topic # 86629 10-Jul-2011 18:34
Send private message

I am looking for two Terrestrial/Satellite Diplexers (one each end). There are a few on trademe and freeviewshop but they have differing frequency specs. Are they all suitable for NZ frequencies? 

The freeviewshop one says 5MHz - 2450MHz 4db loss aprox $15
This CAE-103AUV says  40Mhz - 2300MHz 3db loss $5.25
GECEN CG02-01 says Ant 5-850MHz, Sat  950-2150 3db loss MHz $10

Also, these have between 3 & 4 db insertion loss. What effect is a total 8db loss going to have on satellite reception? I have a 90cm dish with about a 40m RG6 coax run. My Topfield TF6000 has around 73% signal strength for freeview and 68% for SBS. Not sure what db level this represents.

Regards Allen. 

Create new topic
547 posts

Ultimate Geek
+1 received by user: 13


  Reply # 491799 10-Jul-2011 22:52

The satellite signal is already amplified by the lnb in the dish and converted to l-band frequencies. The quality of satellite reception is all about signal to noise ratios and this happens in the dish itself. The insertion loss in the diplexers really doesn't affect the quality until you start to get to very low levels. You won't notice 8dB of insertion loss in quality on the decoder.




don't mess with me.... i'm the hd insider....

Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Geekzone Live »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.