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.




1414 posts

Uber Geek
+1 received by user: 68


Topic # 82158 22-Apr-2011 10:53
Send private message

I have a satellite TV card in my PC and it is working fine using Optus D1, an ex Sky round dish, and the following settings -

LOF1 = 10750
LOF2 = 10750
Switch = 10750

However, reading information in this Forum suggests that for a round sat dish I should be using 11300 for the LOFs and 12750 for the switch.

I'd like to know why/what the differences in LOF's, and just what is the 'switch' part please?

Tks,

R.

Create new topic
1734 posts

Uber Geek
+1 received by user: 235

Subscriber

  Reply # 461529 22-Apr-2011 10:56
Send private message

Round low noise block. All dishes are round.

Edit: Switch is the transponder frequency that it switches between LO frequencies. Given only one LO frequency then it is irrelevant.




Ross

 

Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+

 


Speed Test




1414 posts

Uber Geek
+1 received by user: 68


  Reply # 461536 22-Apr-2011 11:11
Send private message

OK, so should I be using 10750 or 11300 for the LOF's?

R.

 
 
 
 


384 posts

Ultimate Geek
+1 received by user: 2


  Reply # 461545 22-Apr-2011 11:36
Send private message

If you're already getting all the Freeview channels with your current settings, why would you change to other settings? If it ain't broke....




Support a locally made Linux based Operating System, try Linux Lite.
Download Linux Lite



1414 posts

Uber Geek
+1 received by user: 68


  Reply # 461550 22-Apr-2011 11:48
Send private message

valtam,

ha ha ha, very true but I thought it may effect signal strengths etc.

R.

727 posts

Ultimate Geek
+1 received by user: 7


  Reply # 461573 22-Apr-2011 13:07
Send private message

Rickles: valtam,

ha ha ha, very true but I thought it may effect signal strengths etc.

R.

In a sense, it does.  If you have the intermediate (L.O.) frequency set correctly, you get a signal; if you don't, you don't.
Yours appears to be set correctly. 

545 posts

Ultimate Geek
+1 received by user: 11


  Reply # 461589 22-Apr-2011 14:06

You need to set your LNB settings to match the frequency of the LNB on the dish.

If it's working, you have it correctly set. If not swap between 11300 and 10750 until it works.

Most LNB's in NZ are either 10750 or 11300MHz (rarely, some are 10600MHz).

How it works is that the downlinked satellite frequency eg 12546MHz (Ku Band) is down-converted in the LNB to a much lower frequency (L-Band) that can be sent by cable to your decoder.

12456 (Ku Band) - 11300 = 1156MHz (L-Band)

or

12456 (Ku Band) - 10750 = 1706MHz (L-Band)

Your receiver is actually tuning in the frequency that is a result of subtracting the LO frequency off of the satellite frequency. The only way this can work is if your decoder "knows" the LNB frequency in your dish.

Satellite decoders ony receive signals from 950-2150MHz. The correct LNB must be chosen to give you a frequency within this range.

If a satellite has lower frequency signals on it, you will need a lower frequency LNB to put it into this range.

LNB's that switch frequency are used where a larger variation in satellite frequencies exist so that the decoder can switch the LNB to keep the frequencies between 950-2150MHz.

Happy tuning!




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



1414 posts

Uber Geek
+1 received by user: 68


  Reply # 461596 22-Apr-2011 14:46
Send private message

Thanks for that ... great explanation.

R.

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:





News »

Public Wi-Fi plus cloud file sharing
Posted 18-Aug-2017 11:20


D-Link NZ launches professional Wireless AC Wave 2 Access Point for businesses
Posted 17-Aug-2017 19:25


Garmin introduces the Rino 700 five-watt two-way handheld radio
Posted 17-Aug-2017 19:04


Garmin announces the Foretrex 601 and Foretrex 701 Ballistic Edition for outdoor and tactical use
Posted 17-Aug-2017 19:02


Brightstar announces new distribution partnership with Samsung Knox platform in Australia
Posted 17-Aug-2017 17:07


Free gig-enabled WiFi network extends across Dunedin
Posted 17-Aug-2017 17:04


Samsung expands with connect Gear S3 Frontier
Posted 17-Aug-2017 15:55


Fact-checking Southern Cross Next cable is fastest to USA
Posted 17-Aug-2017 13:57


Thurrott says Microsoft Surface is dead last for reliability
Posted 16-Aug-2017 15:19


LibreOffice 5.4 works better with Microsoft Office files
Posted 16-Aug-2017 13:32


Certus launches Cognition
Posted 14-Aug-2017 09:31


Spark adds Cambridge, Turangi to 4.5G network
Posted 10-Aug-2017 17:55


REANNZ network to receive ongoing Government funding through to 2024
Posted 10-Aug-2017 16:05


Chorus backhaul starts with 2degrees
Posted 10-Aug-2017 15:49


New Zealanders cool on data analytics catching benefit fraud
Posted 10-Aug-2017 09:56



Geekzone Live »

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



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.