155
Apply
a
3 V
square-wave
voltage,
frequency
2
kHz,
to
the
channel
B input
-
Check
that
the
trace
height
is
6 DIV;
if
necessary,
readjust
GAIN
potentiometer
R13
on
the
front
panel
Check
that
the
control
range
of
the
channel
B
AMPL
vernier
control
is
1:2,6
to
1:3,5
and
the pilot
lamp
UNCAL
lights
up
as soon
as
the
vernier
is
out of
the
CAL
position
—
Remove
the
input
signal
3.4.9.4.
Gain
(sensitivity)
at externai
X deflection
(unit
16)
—
Depress
push-button
EXT
X DEFL
of
the
X
deflection
controls
(S2)
—
Depress
push-button
EXT
of
the
m.t.b.
trigger-source
controls
(S22)
-
Set
the X
AMPL-HOLD
OFF
control
to CAL
-
Apply
a
300
mV
square-wave
voltage,
frequency
2
kHz,
to
the
m.t.b. EXT
input
—
Check
that
the trace
width
is
6
DIV;
if
necessary,
readjust
potentiometer
R742
on the
trigger-source
board
-
Check
that
the
control
range
of the
X AMPL-HOLD
OFF
control
is 1
:2,6
to 1
:3,5
—
Set the X
AMPL-HOLD
OFF
control
to
CAL
—
Depress
push-button EXT
-r
10
(S22) of
the
m.t.b. trigger-source
controls
—
Increase
the amplitude
of the
input
signal by a factor of 1
0
—
Check
that the
trace width
is
6 DIV
±
2 SUBDIV
—
Remove
the input
signal
3.4.9.5. Gain (sensitivity)
external triggering
via
TRIG VIEW (unit
9)
—
Depress
push-button TRIG VIEW
of the
display mode controls (SI
)
—
Depress
push-button MAIN
TB of the
X deflection controls (S2)
—
Depress
push-button EXT
of the
m.t.b. trigger-source controls (S22)
—
Apply
a 600 mV
square-wave voltage,
frequency 2 kHz, to the m.t.b. EXT input
—
Check
that the trace height
is 6 DIV; if necessary, readjust potentiometer R852
on
the trigger-amplifier
board
—
Remove
the input signal.
3.4.9.6. Gain (sensitivity)
TRIG VIEW
—
Depress push-button TRIG VIEW
of the display-mode controls
(SI)
—
Set the channel A AMPL
switch to .5 V/DIV and its vernier to CAL
—
Depress
push-button A (S22) of the m.t.b. trigger-source controls
—
Apply
a 3
V
square-wave voltage, frequency
2
kHz,
to the
channel
A input
—
Centre the display, using
the m.t.b.
LEVEL
control
R7
—
Check that the trace height
is
6
DIV ±
3
SUBDIV
3.4.9.
7.
Gain (sensitivity) Yg
TRIG VIEW
—
Depress push-button TRIG VIEW
of the display-mode controls (SI).
—
Set the channel B AMPL
switch
to
0.5 V/DIV and its vernier
to
CAL
—
Depress
push-button B (S22) of the m.t.b. trigger-source controls.
—
Apply
a 3 V square-wave voltage, frequency 2 kHz, to the channel B input.
—
Centre the display,
using the m.t.b. LEVEL control R7.
—
Check
that the trace height is 6 DIV
±
3 SUBDIV
3.4.9.8. Gain (sensitivity) Yg VIA X
—
Depress push-button A of the display -mode controls (SI
)
—
Depress push-button
EXT
X DEFL of the X deflection
controls
(S2)
—
Push
the
Y
POSITION
controls to position NORMAL
—
Depress push-button AC of the channel B signal-coupling controls
—
Depress
push-button
B
S22 of the m.t.b. trigger-source
controls
—
Set the
d.t.b.
TIM E/D IV
switch
to
OFF
—
Set the channel B
AMPL
switch
to .5
V/DIV
and its vernier to
CAL
—
Apply
a 3
V
square-wave voltage, frequency 2
kHz,
to
the channel B input
—
Check that the trace width is
6
DIV
±
1
SUBDIV
—
Remove
the input signal.
3.4.10.
Vertical channels
The adjustments of the vertical channels A
and
B are identical.
The knobs,
sockets and adjusting
elements
of channel B are shown in brackets after those of channel A.
Before
performing the following tests,
the
balances
and sensitivities must be
checked
in
accordance with sections 3.4.7. and 3.4.9.
To Next Page
Loading...
