Specifications
switch
(pull
out
and
rotate to
unlock)
selects
the
sweep
rate
for
the
B
Sweep
circuit
for:
delayed
sweep
operation
only.
VAR control
must be
in the
cali-
brated
detent
for
calibrated
A Sweep
rates.
When
the
A
TIME/DlV
switch
is
rotated
fully counter'
clockwise
to
the X-Y
position,
the
horizontal
(X-axis)
deflection
is
controlled
by the Channel
1 input signal.
A
AND B TIME/DIV
AND DELAY
TIME
Switches
(used
with
DM44l-Operation
is
the
same as
36a.
The
A TIME/DIV switch
also
controls
the
TIME
indicators and
decimal
point
location
when the
DM44
is
in
the
TIME or
1lTIME
Function.
POSITION Control-Positions
the
display
horizontal'
ly for A Sweep
and
B Sweep,
or
on the
X-axis
(hor'
izontally)
in the
X-Y
mode.
Provides
both coarse
and
fine
Oontrol
action.
Reverse the
direction
of
rotation
to
actuate
fine
positioning
action.
X10
MAG Switch-When
pressed
in,
increases
dis-
played
sweep
rate by
a
factor of
10.
Extends
fastest
sweep
rate
to 2
nanoseconds/division.
The
magnified
sweep
expands
the
center
division
of the
unmagnified
display
(0.5
division
either side
of the
center
graticule
line).
VAR
Gontrol-Provides
continuously
variable bweep
rates
between
the
calibrated
settings
of
the
A
TIME/
DIV switch.
lt extends
the
slowest
A Sweep
rate
to at
least
1.25
seconds/division.
The
A Sweep
rate
is
calibrated
when
the
control
is
set
fully clockwise
to
the calibrated
detent.
lt
must
be in
the
detent
posi'
tion
to
make
accurate
differential
time
measure'
ments.
On
instruments
equipped
with
a
DM44,
the
VAR
control
must
be in
the detent
position
to
make
accurate
measurements
in the
TIME
and
1/TIME
functions.
UNCAL
lndicator-LED
illuminates
to
indicate
that
the
A Sweep
rate
is
uncalibrated
(VAR
control
is out
of
the
calibrated
detent).
Xl0
MAG
lndicator-LED
that
the
X10
magnifier
is
on.
illuminates
to
indicate
DELAY
TIME
POSITION Control-Selects
the
amount
of
delay
time
between
the
start
of
A
Sweep
and
start
of
B Sweep.
Delay time
is
variable
to at
least
10
times
the
time
indicated
by the
A TIME/DIV
switch.
@
14
4658/DM44
Operators