Frequently Asked Questions about the novel satellite tv accessory - DUP150:

How does the novel satellite tv accessory - DUP150 affect the RF signal?

Does the novel satellite tv accessory - DUP150 pass the 22kHz DiSEqC signal?

How much is the DC dropout voltage on DUP150?

Is there any probability to damage the LNB or satellite receiver by hot-plug of
the novel satellite tv accessory - DUP150?

Do the dish and cable need grounding when a DUP150 was installed?

How does the novel satellite tv accessory - DUP150 affect the RF
signal?

Insert loss of DUP150 is about 1.5dB to 2.5dB from 100MHz to 2150MHz, and a little higher than 3.0dB from 5 to 100MHz. It’s lower than the insert loss of most satellite tv accessory such as DiSEqC switch and splitter whose insert loss maybe higher than 3dB.
Return loss of DUP150 is controlled within the range form -15dB to -20dB by impedance-matching design. It’s also better than most other satellite tv accessory whose return loss is even not given. So the novel satellite tv accessory - DUP150 does not affect you TV-watching effect basically.

Does the novel satellite tv accessory - DUP150 pass the 22kHz DiSEqC
signal?

Yes, DUP150 pass the DiSEqC signal and does not affect it.

How much is the DC dropout voltage on DUP150?

The DC dropout voltage on the novel satellite tv accessory - DUP150 is about 0.3V at a 500mA current, and it’s in direct ratio to the current.

Is there any probability to damage the LNB or satellite receiver by
hot-plug of the novel satellite tv accessory - DUP150?

The dish LNB and the satellite receiver are not designed for hot-plug; hot-plug may cause their malfunction. Though DUP150 needs to be powered by the satellite receiver before it can operate, DUP150 does not hot-plug the LNB and receiver. DUP150 has a semi-conductor switch serial connected with the metal contactors. The semiconductor switch turn on after the metal contactors turn on, and turn off before the metal contactors turn off, so the metal contactors operate with zero voltage, thus the hot-plugging is avoided.
The LNB is soft powered-up by properly controlling the semiconductor switch, this soft powering-up is just like what the satellite receiver does for the LNB when it’s turned on.
DUP150 is designed carefully to avoid any potential problems and safe to the dish LNB and satellite receiver. It is not just a simple switch.

Do the dish and cable need grounding when a DUP150 was installed?

Dish and its cable grounding is not critical for the protection of the receiver side equipment installing the novel satellite tv accessory - DUP150, but they still should be grounded according to the National Electrical Code (NEC) for the United States. The grounding can limit the overvoltage on the dish and cable in case of lightning strike and make sure the air gap of DUP150 isn’t broke down.

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