How the Instrument Works
System Architecture
Host RAM
The host RAM is 4 Mbytes of nonvolatile RAM. This is where the waveform
data is held and manipulated. In addition, this is the location of the current
front-panel setup, setup memories, and waveform memories.
Flash ROM
The ash ROM contains the system rmware that controls the operation of
the instrument. You can load new system rmware into the instrument by
using the disk drive.
Disk drive
The disk drive is a 3-1/2 inch, high-density, MS-DOS
R
compatible disk drive.
You can use the disk drive to load system rmware into the ash ROMs,
load applications, save screen dumps in a TIFF,GIF, or PCX format, or as
additional
storage space
for saving
waveforms
and
front-panel
setups
.
User
interface
hardware
The
user
interface
hardware
is
the
keyboard,
and
the
hardware
that
interfaces
the
keyboard
and
knob
with
the
system
bus
.
FIFO
and
HP-IB
hardware
The
FIFO
is
a
rst-in-rst-out
memory
that transfers
waveforms
through
the
HP-IB
bus
under
hardware
control.
This
hardware control
is
much
faster
than
the
software
control
used
by
other
instruments
.
The
FIFO
increases
the
HP-IB
throughput
of
the
instrument.
Centronics
port
The
Centronics
port
is
a
parallel
connector
for
printers
compatible
with
the
Centronics
interface
.
High-speed port
The high-speed
port feature
is
not
implemented
at
this
time
.
Video RAM
This is 1 MByte of fast video RAM for storing the display image. The video
RAM also contains the pixel memory.
Display
The display
is
a
9-inch,
high-resolution,
color
display
.
Refer
to
\Display"
in
Chapter
1
for
more
information.
13-11
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