User's Manual

8.5 Front Panel
The Front Panel consists of a micro-controller, 16-character by 2-line LCD display, operator
switches and interface circuits (see fig. 7:1).
The Front Panel is the main system controller for the unit. All configuration of the unit
hardware is from this board. An I
2
C two-wire interface is used to communicate with all other
intelligent devices within the unit. This carries the command data and reads back status data
from all boards within the unit. At power-up this board initializes all the other boards and
during normal operation monitors all the major functions and reports any problems as part of
the unit status.
All configuration parameters, video settings, audio settings, MPEG encoder parameters,
frequencies etc are held on this board. The MPEG parameter set required (one of sixteen) is
selected via the Front Panel by the operator. These parameter sets are held in the non-
volatile memory of the front panel unit and can only be upgraded by the factory.
(fig. 7:1)
RFX-PHT/CMT Issue 1.1 Page 31 of 33