Keithley 236 Service Manual

SECTION
4
. .
Princip1es
of
Operation
41
INTRODUCTION
A simplified block diagram
of
the
Model
236/237
is
shown in Figure 4-1. The
instrument
may
be divided
into
two sections; analog and
digitalcircuitry.
The analog and
digital sections
are
electrically
isolated from
each
other
This section contains
a general
functional description of by
the use
of opto4solators for
control
and communica
the Model
236/237. Detailed schematics
and component
tions. Separate
power supplies for
the analog and digital
location drawings are
located at the end of this manuaL sections ensure proper
isolation.
Figure
44 Overall Block
Diagram
Qut +
Out
44

Keithley 236 Specifications

General

Voltage Source Range	±100V
Current Source Range	±100 mA
Voltage Measure Range	±100V
Current Measure Range	±100 mA
Voltage Range	±100V
Current Range	±100 mA
Type	Source Measure Unit (SMU)
Compliance Limit	Programmable
Interface	IEEE-488
Resolution	5.5 digits
Operating Modes	Voltage source, Current source, Voltage measure, Current measure