Point Operation Monitoring, Serial Communication

Addendum 1

i-Point Operation Monitoring

The i-Point Antenna control system is designed to be very simple to operate and is expected to be fully automatic in acquiring the required satellite signals.

However the system does not provide very much user feedback if the satellite acquisition operation does not complete.

This document is intended to provide method to gather information on the progress of the satellite acquisition.

1 Serial Communication

To communicate with the i-Point system a PC with a serial port is required. The information below described the use of hyper-terminal as a "terminal emulator", but any similar program could be used instead.

One unusual point about the serial interface is that the UIU front panel will keep trying to take control

of the interface. When this happens you may see “garbage characters” generated. To reduce the effects of this type an extra “carriage return” every 10 seconds or so, The normal serial parameters are 19200,n,8,1 but mobile systems which connect the UIU to a DVBRCS modem are typically set to 4800,n,8,1.

The Baud rate can be changed via the UIU front panel.

Press the buttons as follows:-

Down arrow *6 Display Shows "User Setup" Enter Display Shows "Final Pol"

down arrow *4 Display Shows "GPS Output" Enter Display Shows "4800"

Enter. Display Show "19200". Clear. Return to main menu.

This baud rate change is not stored. The next time the system is power cycled the baud rate will revert to normal operation.

The connection is taken from the RJ-11 front panel connector on the i-Point User Interface Unit. A cable can be supplied but connection details are shown below.

RJ-11 TO 9-PIN D-Type Socket ADAPTER CABLE

To connect a PC to the UIU Front Panel M&C connector use this adapter cable. Adapter cables must be individually wired. Follow the pin out listed in table below.

The diagram shows the pin out for the RJ-11 connector, looking into the socket on the panel. This is a 6 pin version of the RJ-11 connector, sometimes known as an RJ-12

D Connector Signal RJ-11 Connector

Pin 1 Common Pin 5

Pin 2 Term Data IN Pin 3

Pin 3 Term Data OUT Pin 2

Pin 5 Ground Pin 1

Pin 6 Not Used Pin 4

Do Not Connect + 5VDC @ 100 mA Pin 6

Same table in RJ-11 order

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