What does mean by 22k ?

[PUNJABIVEER]

In digital satellite receiver we see 22k feature. What does it mean.. What is its work..

 

[Gssran]

RE: What does mean by 22k

i Think Vinay bhai gives you the right answer.

 

[Biswajit.HD]

RE: What does mean by 22k

22khz is a switch to multiply the number of ports on a Diseqc switch. This switch is very simple, It has two ports to connect to two lnbs and one port to a receiver (or Diseqc switch). The 22khz switch looks for a 22Khz tone send by the receiver and if such a tone exists, it will switch to the 22khz “on” port and if no tone is present to the 22Khz “off” port, So you cannot use it to add “Universal” ku-band lnbf , as these lnbf has a built in 22K switch to change them from low to high ku-band.
Here is a sample diagram to show, how four c-band and two ku-band universal lnbf can be added to one receiver.

Please see this carefully, The Universal ku-band lnbfs are connected directly to the DISEqC switch and c-band lnbs are connected to a 22KHZ switch first and then to Diseqc switch, If you use four 22K switches and one 4×1 Diseqc switch , you can add upto eight lnbs on a single receiver, There are other options like the Uncommitted switches and DISEqc 1.1 switches, But these are not available in India to the best of my knowledge and so we are not discussing them here.
Even 22Khz switches are becoming very hard to find these days,

 

[PUNJABIVEER]

RE: What does mean by 22k

Thanks for yours valuable response.. Impersed by yours feedback.. Thanks

 

[Gssran]

RE: What does mean by 22k

Punjabiveer to say Thanks, you can press the Thanks key also, its just a advice & easy also.

 

[Biswajit.HD]

RE: What does mean by 22k

Very nice topic have been put forward by Punjabiveer... Thanks for starting the thread...
Important point and must be known to all satellite trackers.

 

[Biswajit.HD]

RE: What does mean by 22k

Thread made sticky.
More details on 22k expected from other satellite trackers too :huh

 

[quickboy]

22K switch is used to switch between to lnbs (or Two local oscillators in a single lnbf to switch between them)

1. Almost every STB has an option to send a tone(or frequency) through the lnbf cable, THis frequency is standardised at 22,000 Hz (Hence the name 22K or 22 khz),

2. A switch which can operate one lnb at 22k off position and switch to another in 22k on position is called a 22k switch,

3. They can be stand-alone switches or built in, A stnad alone swich has two ports one marked 22k on and other off .

4. Built in switches are normally used in UNIVERSAL KU-BAND lnbfs, (like your normal DTH lnbfs)
They are used to switch between Local Oscillators inside the lnbf, Especially to switch between lower and higher KU-bands, If you want to use lower KU you simply select LO- frequency 9750 and when you want higher KU frequencies you select LO as 10600, and select 22k on, So Oscillators indide the lnbf are switched,

5. Modern receivers come with a "universal" lnbf setting, SO the STB automatically turns 22k tone on and off, depending on the frequency you input, No need for selecting a 22k on or off in those
(for example when you input TP 10990 the reciver switches 22k to off and when you input 12572 stb knows it should send the 22k tone)
Hope that helps

 

[omparkash sharma]

good info by quickboy & biswa ji thanks

 

[Biswajit.HD]

Whats the price of a 22k switch?? :huh