Raymarine 81285_1 manual Satellite switching, Technical tips

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Satellite switching

The satellite receiver has the ability to switch satellites automati- cally using a DiSEqC signal.

As you change channels on the television, the receiver will send a DiSEqC signal when another satellite is required.

The receiver is able to switch between Sat A and Sat A* or Sat B and Sat B*, but you cannot automatically change from the Satel- lite A pair to the Satellite B pair.

For example, if you are watching a channel on Sat A (DTV101) and decide to change the channel, the new channel may be on a different satellite. If the channel is on a different satellite, the receiver will send the DiSEqC signal and tell the antenna to switch to Sat A* (DTV119).

If an HD channel on DTV110# is requested, you will have to manually press the Sat B button on the HD-ACU. This will change the satellite pair to Sat B and Sat B*. As you change channels now you have the option to switch automatically between DTV101 and DTV110#.To return to the Satellite A pair, simply press the Sat A button on the HD-ACU.

In the installation that uses a multi-switch, a DiSEqC supplier is required if three DirecTV satellites are used. This additional accessory is required because the multi-switch does not allow the DiSEqC signal to pass properly. Since the signal cannot pass, there is no satellite switching. In this case you could only track two satellites - Sat A and Sat B - and it would require a manual button press on the HD-ACU to switch satellites. Since some systems use three satellites, the DiSEqC supplier is required.

Technical tips

1.Only the Master receiver has the ability to change the satel- lites automatically - this receiver should be HD compatible. The Master receiver can change satellites between DTV101, DTV119 and DTV110#. Any other receivers in the system do not have the ability to change the satellite being tracked, only watch the channels on the current satellite, i.e if the Master receiver is tracking DTV101, then all the remaining receivers in the system can only watch channels on DTV101.

2.During the setup of your HD receiver, you should select the option that states “Oval Dish with 3 LNBs”. This will tell the receiver that it will have to be able to look for three satellites.

3.During setup, the receiver will look for each of the three DirecTV satellites. Since your HD-ACU is set up with two satellite pairs, you will have to carry out a manual button press during this section of the setup procedure. The test will check for DTV101 and you will get an OK. It will then check for DTV119, and you will again get an OK. As it begins searching for DTV110# you will have to manually press the Sat B pair on your HD-ACU. The receiver will then be able to locate DTV110#.

4.Once setup is complete, the receiver will begin downloading the guide. As this occurs the receiver will tell the HD-ACU when to switch satellites. Since the receiver can only switch between the main satellite and the DiSEqC satellite - Sat A and Sat A* or Sat B and Sat B* - the guide will be likely to only download channels from two of the three satellites at this time. The channels from the third satellite will populate the guide over a period of time. This period of time can be as little as 20 minutes or extend to several hours.You will not be able to watch all of the channels until the guide is fully populated.