OPTIONS
Your
4658
may be equipped with one
or
more
instrument
options. A brief description
of
each
option
is
given
in
the
following discussion. Unique and more detailed operating information pertaining
to
Options
05
and
07
are presented
on
succeeding pages
of
this section.
For
further information on
instrument
options, see
your
Tektronix
Catalog
or
contact
your
Tektronix
Field Office
or
representative.
GENERAL DESCRIPTION
OPTION
01
This
option
deletes
the
temperature
probe from
the
DM44.
OPTION
04
The instrument
is
modified
to
meet certain specifica-
tions related
to
radiated interference requirements. This
option
does
not
affect
the
basic instrument's operating
instructions presented
in
this manual.
OPTION
OS
Option
05,
when installed
in
the
4658
oscilloscope,
adds
a TV Sync Separator and
other
changes
to
provide stable
sweep triggering from composite video waveforms.
Two
positions are added
to
the
A
TRIGGER
COUPLING
switch: TV FIELD and
TV
LINE. When these positions
are selected,
the
A Sweep may be triggered
at
the
Field
or
Line rate with
the
A
TRIGGER
LEVEL
control.
A
TV
LINE position
is
added
to
the
8
TRIGGER
SOURCE
switch.
In
this position,
the
8 Sweep
may
be triggered
at
the
line rate. Option
05
circuitry accepts sync-positive
or
sync-negative video from Channel 1, Channel 2,
or
external
input. Recognition circuits
accommodate
405-, 525-,
and
625·1ine,
50
or
60
Hz
field-rate broadcast systems and are
compatible
with
closed-circuit systems with
up
to
1201-
line,
60
Hz
field rates.
96
465B/DM44
Operators
@
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