Originally Posted by
manian
I think it's just to show the true capabilities of the multiswitch. They can be used with Universal Quad LNBs. However, I would image most are used in a dual LNB environment and exploit the 22 KHz (high) tone for additional switching.
If you take the average Spaun 4 input multiswitch in a two dual LNB environment, you have the following:
INPUT 1 (LNB A): V-LOW (13V, 0 KHz)
INPUT 2 (LNB A): H-LOW (18V, 0 KHz)
INPUT 3 (LNB B): V-HIGH (13V, 22 KHz)
INPUT 4 (LNB B): H-HIGH (18V, 22 Khz)
As you can see, this will allow 2 dual LNBs individually switched by a 22 KHz tone from the receiver. LNB A is selected when 0 KHz is sent, LNB B when 22 KHz is sent.
An 8 input multiswitch in a 4 dual LNB environment is only slightly more complex:
INPUT 1 (LNB A): V-LOW (13V, 0 KHz, Tone A)
INPUT 2 (LNB A): H-LOW (18V, 0 KHz, Tone A)
INPUT 3 (LNB B): V-HIGH (13V, 22 KHz, Tone A)
INPUT 4 (LNB B): H-HIGH (18V, 22 Khz, Tone A)
INPUT 5 (LNB C): V-LOW (13V, 0 KHz, Tone B)
INPUT 6 (LNB C): H-LOW (18V, 0 KHz, Tone B)
INPUT 7 (LNB D): V-HIGH (13V, 22 KHz, Tone B)
INPUT 8 (LNB D): H-HIGH (18V, 22 Khz, Tone B)
Generally, anything greater than 8 inputs uses the Diseqc 1..4 (Option A/B, Position A/B) commands.
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