Table of Contents
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The correction constants can be updated by executing the routines in Chapter 3,
"Adjustments and Correction Constants. n
Digital Signal Processor
The digital signal processor receives the digitized data from the A10 digital
IF. It computes discrete Fourier transforms to extract the complex phase and
magnitude data from the 4 kHz IF signal. The resulting raw data is written into
the main RAM.
The A18 display is an 8.4 inch LCD with associated drive circuitry. It receives a
the A20 backlight inverter. It receives the following signals from the A19 GSP:
diital TTL vertical sync
n
blanking
n
data clock
n
digital 'ITL green video
n
The A19 graphics system processor provides an interface between the A7 CPU
and the A18 display. The CPU (A7) converts the formatted data to GSP
commands and writes it to the GSP. The GSP processes the data to obtain
the necessary video signals and sends the signals to the A18 display. It also
produces VGA compatible RGB output signals which are sent to the A22 GSP
interface and then routed to the Al6 rear panel. The assembly receives one
power supply voltage from the A22 GSP interface: + 5VCPU, which is used for
processing and and supplying power to the A20 backlight inverter and the A18
display.
Theory of Operation
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Troubleshooting
