Frequencies???

[dl_sledding]

Hi all,

I have grepped the forums for the answer to my question, and can't seem to find it...

I use Lyngsat quite a bit in setting up our headend, and for the most part I get fairly accurate information from them. However, there is one piece of info that I can't seem to figure out...

When I am programming a Mot 4410 or 4400MD, I sometimes need to enter the L-Band freq. Unfortunately, Lyngsat does not show the L-band freq. I am not completely sure what the freq is called that they do show, but it's the freq that the LNB is receiving before downconversion.

Anyway, what I am looking for is a conversion (program, sequence, matrix, algorithm, etc) that will show the L-band freq from the given freq.

Or, am I just missing something entirely???

Usually the content provider's techs are great for docs on how to set up an IRD, but I would like to understand how to extrapolate the info that they give me on my own, mainly so I understand how this is all working.

Thanks!!!

Alex

 

[Mr Tony]

welcome

to find the L frequency, take the frequency that Lyngsat shows and subtract the LNB LO and voila...the L frequency. This is on KU

On C-Band you take the frequency and subract it from 5150

so as an example, on SBS6 Ohio News is at 11741. So if I have a standard LNB the L frequency would be 11741-10750=991 is the L frequency

For C-band if the frequency is 4000 then it would be 5150-4000=1150

I stumbled upon that conversion with my Pansat 1500. On a blind scan it goes from 950-1600 IF frequency but shows the conversion (adding 10750 to each one)

 

[linuxman]

Or if you hover your mouse over the blue frequencies to the left on Lyngsat, at the bottom of your browser it will show the input frequency.

Fred

 

[dl_sledding]

Iceberg: Cool. Makes sense now.

Linuxman: Never noticed that b4. Only works in IE. Moz doesn't work properly.


Thanks for the quick answers! It helps a lot!

Alex

 

[linuxman]

Works in Mozilla Firefox 2.0.0.1.

Very seldom use IE.

Fred

 

[Anole]

I don't understand the question...

... but, if you mean the IF frequency....
(intermediate frequency)
then it is the received frequency, minus the LO or local oscillator frequency.
The IF range is generally between 950mhz and 2150mhz.

eg: WhiteSprings is on 11964 mhz (or 11.964 ghz)
if you LO is STANDARD at 10750 mhz , then the IF = 1214 mhz
if your LO is UNIVERSAL at 10600 mhz , then the IF = 1364 mhz

For C-band, the LO is usually 5150 mhz.
and the the IF is (LO - receive freq)

edit:
sorry, I started typing this when there were no answers, then went out to dinner before actually posting it.
Looks like the answers posted are perfectly clear.