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A1
CPU
The
A1
CPU
consists
of
the
following
circuits
and
parts
(See
Figure
10-3):
CPU
central
processing
unit
that
controls
the
analyzer
.
DSP
digital
signal
processor
that
is
used
for
fast
data
processing.
Memory
storages
consists
of
BOOT
ROMs
,
Flash
Memory
,
EEPROM,
Backup
SRAM,
DRAM,
and
Dual
P
ort
SRAM.
The
backup
SRAM
is
powered
from
a
large
capacitor
that
is
charged
when
the
analyzer
is
turned
on.
Therefore
,
the
SRAM
keeps
its
data
at
least
72
hours
after
the
analyzer
is
turned
o.
The
Dual
P
ort
SRAM
is
used
for
communication
between
the
CPU
and
DSP
.
F-Bus
Timer
is
used
in
the
frequency
bus
measurement
that
is
a
diagnostic
function
of
the
analyzer
.
F
or
a
description
of
the
frequency
bus
measurement,
see
the
Service
K
ey
Menus
Chapter
.
Analog
Board
Interface
interfaces
between
the
CPU
and
analog
assemblies
.
24
bit
I/O
Control
controls
the
input/output
from/to
the
24
bit
I/O
port
connector
on
the
A31
I/O
connector
from/to
the
A17
24
bit
I/O
P
ort.
Keyboard
Controller
controls
the
A30
front-panel
keyboard.
A
udio
Interface
controls
the
beeper
on
the
A30
front-panel
keyboard.
FDD
Control
controls
the
A53
FDD
.
GPIB
Control
communicates
with
the
external
GPIB
devices
through
the
GPIB
connector
on
the
A31
I/O
connector
.
mini-DIN
Control
interfaces
between
the
CPU
and
the
external
keyboard
through
the
mini-DIN
connector
on
the
A32
I-B
ASIC
Interface
.
I/O
Control
controls
external
devices
through
the
I/O
PORT
connector
on
the
A32
IB
ASIC
interface
.
It
also
interfaces
between
the
CPU
and
the
external
inputs
through
the
EXT
PROG
RUN/CONT
connector
.
A17
24
Bit
I/O
P
ort
The
A17
24
bit
I/O
port
assembly
interfaces
the
4352B
to
an
external
handler
,
or
the
device
under
test
(PLL
circuit)
through
the
A31
I/O
connector
.
A30
Front-P
anel
K
eyboard
The
A30
front-panel
keyboard
assembly
detects
your
inputs
(key
inputs
and
RPG
inputs)
from
the
front
panel
of
the
analyzer
,
and
transmits
them
to
the
keyboard
controller
on
A1.
A31
I/O
Connector
The
A31
I/O
connector
is
the
board
with
two
connectors:
the
GPIB
connector
and
the
24
Bit
I/O
connector
.
These
connectors
are
connected
to
the
GPIB
controller
on
the
A1
through
the
A20
motherboard
and
the
A17
24
bit
I/O
port
assembly
.
Theory
of
Operation
10-9
Содержание 4352B
Страница 11: ......
Страница 31: ......
Страница 73: ......
Страница 80: ...Figure 3 4 List Box Menu Adjustments and Correction Constants 3 7 ...
Страница 82: ...Figure 3 6 Reference Frequency Adjustment Location Adjustments and Correction Constants 3 9 ...
Страница 85: ...Figure 3 9 Third IF AMP GAIN Adjustment Location 3 12 Adjustments and Correction Constants ...
Страница 103: ...Figure 4 1 Troubleshooting Organization 4 2 Overall T roubleshooting ...
Страница 113: ......
Страница 130: ...Figure 5 11 Power Supply Block Diagram 1 Power Supply T roubleshooting 5 17 ...
Страница 131: ...Figure 5 12 Power Supply Block Diagram 2 5 18 Power Supply T roubleshooting ...
Страница 132: ...Figure 5 13 Power Supply Block Diagram 3 Power Supply T roubleshooting 5 19 ...
Страница 133: ......
Страница 135: ...Figure 6 1 Digital Control Group Simpli ed Block Diagram 6 2 Digital Control T roubleshooting ...
Страница 146: ...Figure 7 2 Source Group Troubleshooting Flow Source Group T roubleshooting 7 3 ...
Страница 154: ...Figure 8 2 Receiver Group Troubleshooting Flow Receiver Group T roubleshooting 8 3 ...
Страница 198: ...Figure 10 1 Power Supply Functional Group Simpli ed Block Diagram Theory of Operation 10 3 ...
Страница 203: ...Figure 10 3 Digital Control Group Simpli ed Block Diagram 10 8 Theory of Operation ...
Страница 269: ......
Страница 272: ...Figure B 1 Power Cable Supplied Power Requirement B 3 ...
Страница 273: ......
Страница 293: ...Error Messages Numerical Order 0400 Query error 0410 Query INTERRUPTED 0420 Query UNTERMINATED Messages 20 ...