Quote:
Originally Posted by tandemrudy
I read here........A 22 khz switch can work with the standard , universal uses 22 khz tone switching , and can't have a 22 khz switch in front of it . Using a 22 khz switch with an Invacom lnb, for example, allows you to have both a circular and linear signal go to the switch .
What does it mean when you say a Standard Lnb can have a 22 khz switch in front of it ? ( Is this a physical Switch you speak of?)
And the Univesal Lnb can only use a 22 khz (tone) switch which allows one to have both Circular and Linear signals go to the switch.
Is the "Tone Switch" a non physical switch IE signal type switch of some sort? And what "switch" is it allowing the Circular and Linear signal to go to?
Is it really necessary for me to be concerned with the 22Khz switch , a physical one in "front" or a "tone one" if I can still get the satellites?
Thanks |
Maybe I'm wrong, but it sounds like you are asking what the purpose of a switch is. Switches,
DirecTV Approved Multiswitshes Multi switches
can be used for several purposes, but often are used to allow a receiver to switch between different dishes, different lnbfs or different LNBs on a big dish feed. In the case of the
QPH031, a switch can be used to select between one of the linear ports and one of the circular ports on the lnbf. For the
QPH031, you can use either 22KHz or a
DiseqC switch, it doesn't matter. If people want to select between lnbfs, however, and one of those lnbfs is a universal lnbf, then they can't use a 22KHZ switch, because a universal lnbf uses a 22khz signal to switch between the low LO freq and the high LO freq.
You ask if these switches are a "physical" switch, and seem to differentiate that from a "tone" switch. I'm not completely sure what you're asking here. Either type can be an actual physical relay type switch that has moving parts, or they can be semiconductor switches that have no moving parts. I've always assumed that these 22khz and
DiseqC switches were semiconductor type switches, but people mention hearing clicking noises inside, so I'm not sure, but it doesn't matter. They are only different by what kind of signal tells them to switch. Actually, both 22khz and DiseqC switches use a 22khz "tone", but the
DiseqC modulates the 22khz tone with a digital signal, and the
DiseqC signal isn't continuous, so it won't interfere with the use of 22khz devices.
If you are planning to use a
QPH031 you don't need to be concerned with what type of switch, but you may have to consider the use of a switch, because that lnbf has 4 ports, 2 for circular and 2 for linear. If you don't use a switch, you have to run separate coaxes to separate receivers. This may be what you want to do anyway, if you are going to use a dishnet or
DTV receiver, but if you are going to try to use your fta receiver to find some of the FTA signals on these sats, then you'd want to use a switch to select whether the receiver is looking at the circular or linear port.
You asked "And the Univesal Lnb can only use a 22 khz (tone) switch which allows one to have both Circular and Linear signals go to the switch." The circular and linear signals get to the switch via separate coax going from the different ports on the lnbf to the different ports on the switch. The question is a bit confused in that the
QPH031 is a standard lnbf not a universal, and you can't use a 22khz switch with a universal because it already has a 22khz switch built in, so it's not that you can only use a 22khz switch with a universal, it's that you CAN'T use one.
Sorry for lengthy reply, but it sounded like you were confused. I've probably added to the confusion.
Linear Mode
