rolfw said:I would like to hear the justification of that, as I can't see any reason why it would be so.
canofan said:A quattro allows you to use individual line amplifiers that are powered by the multiswitch instead of by the receiver.
Those installations that need a line amplifier are better served by a quattro.
Besides, as the switching of the quad switches the local oscillator to the correct polarity it also varies the supply voltage to the LNB port.
With the quattro the voltage on the LNB port is not varied and the polarity/22khz emitted by the receiver serve only as a signal to the multiswitch with no current.
Everytime the receiver is turned off the Quad goes dead and is reactivated when turning the receiver on again.
The multiswitch being on continuously does not subject the LNB to these changes of state.
This implies longer life for the LNB and the receiver.
You are welcome, you have helped me in the past as well.HB13DISH said:Thanks canofan for the post.
I am beginning to see the light, especially the bit about the long life as a result of having the same voltage and polarization for the four sections of the quatro LNB, and without subjecting the LNB to constant changes as a result of frequent zapping.
I also like the bit about the possibility of expanding to more than four receivers using a 4x8 multiswitch (if there is one ?), as the LNB would be situated in a difficult to access location and replacing it can cost a lot of money for the professional installer.
rolfw said:Hm, I can see where the stabilized voltage may perhaps extend the life on an LNB and come in useful if line amps are required, but not entirely sure by how much though and whether such a saving would be value for money.
The difference in price between a quad LNB against a quattro LNB and a multiswitch (if only going for four outlets) would be considerable, probably to the degree that it would need to at least double the life of the LNB, purely to break even on the deal.
using this one supplier as a reference in the effort towards other things being equal:
INVACOM QUAD C 120 LNB QDF-031 0.3dB = Euros 73.95
INVACOM QUATTRO C 120 LNB QTF-031 0.3dB = 50.95
SATMATRIX MULTISWITCH MS 5/4 S 4 RECEIVER= 48.95
The satmatrix is an excellent multiswitch
option costs Euros 99.90
The quad solution 73.95
difference Euros = 25.95
You probably would agree that the difference is acceptable.