Fluke 6060B - Option -488 IEEE-488 Interface

Option
-488
IEEE-488
Interface
488-1.
INTRODUCTION
The IEEE-488
Interface (Option
^SS), consists of the IEEE-488
printed circuit assembly
(A3A3AI) mounted in a metal
frame
on the Generator
rear
panel. It is interfaced directly
with the Controller assembly
A2A7.
488-2.
OPERATION
The
operation
of
this option
is covered in Section
2 of
this
manual
488-3.
CIRCUIT
DESCRIPTION
The
IEEE-488 Interface
uses an NEC ;tPD7210
Talker/ Listener IC (Ul) to handle
all
IEEE-488
standard
communications
protocol. All data,
address,
and control lines to the
7210 are buffered
on the Controller. Two
MC3447
bus drivers (U3 and
U4) interface the
7210
directly
to the IEEE-488
bus.
The presence of the
optional
IEEE-488 Interface
is
detected by the microprocessor
when
the option
is
plugged into the Controller
board. The signal lEINL,
normally at +5V, is
pulled to circuit ground when the
option is installed.
488-4.
Address Switches
Tri-state
buffer U6 provides the
status
of the IEEE-48S rear
panel address switches when
the Generator is interrogated.
These
switches determine
the IEEE-488 bus address and
talk-only (to) or listen-only
(lo) modes. When
opened,
the switch just to the left of the
IEEE-488 bus connector
disconnects
the bus shield
ground from the system ground.
488-5.
MAINTENANCE
This option
does not change the performance
test or calibration
adjustments
of
the
Generator.
Troubleshooting information
for this option is in Section 4D
under Digital
and Control troubleshooting.
488-6.
LIST
OF REPLACEABLE
PARTS
Table
488-1
lists
replaceable
parts for the
6060A-488. Figure
488-1
is the component
location diagrams
for the 6060A-488.
488-1