% -*- Mode:Text -*- 

\chapter{Video input}\sectlabel{vidin}

\section{Camera}

Currently, the \step\ hardware and software support as a video input device
the \tsc{panasonic} GP-MF702 camera---a solid state B/W camera having a
resolution and a scanning rate (480 lines at 60 frames/sec, noninterlaced)
that match those of the \vga\ monitor. Both camera and \vga\ monitor can be
attended to in real time by one \step\ module operating on a 512\by512 array.
The camera is operated in external-sync mode; the sync and pixel-clock
signals are supplied by the \step\ box.


\subsection{Camera switch settings}

In what follows, \tsc{old} means ordinary videocamera mode, with internally
generated sync, as shipped; \vga\ means our target mode, with noninterlaced
60 Hz frames (Double Speed Full Line Non-Interface) and external sinc and
pixel clock. For the switches, 0 means `off', 1 means `on'.

$$
 \begin{tabular}{|l|c|c|l|}\hline
	switch & \tsc{old} & \vga & notes\\\hline\hline
	Ext-7 &	0 & 1 & Scanning mode\\
	Ext-8 &	1 & 1 & \\\hline
	Sw101-5 & 0 & 1 & Double speed\\
	Sw201 & forw & back & \\
	Sw301 & up & up & Check `up' is right\\\hline
	Sw303 & 1 & 0 & Composite\\
	Sw304 & forw & back & AC/DC for video out\\
	Sw101-7 & 0 & 1 & Pixel clock in (722\by fH)\\\hline
 \end{tabular}
$$

