Safety
Precautions
The
metal
case of this instrument
is
connected
to
the
ground
of
the
internal circuit.
For
proper
opera-
tion,
the
ground
terminal of
the
instrument should
. always
be
connected
to
the
ground of
the
equipment
under
test.
The
WG-349A
Direct/Low-Capacitance
Probe
and
Cable
has a shield throughout its entire
length
which
is
connected
to
the
instrument
ground
and
case.
Care
should
be
exercised to avoid striking
the
cathode-ray
tube
or subjecting it to more
than
mod-
erate
pressure
in
handling.
Because
the
tube
contains
a high
vacuum,
implosion might result in injury
from flying glass.
An
important
point
to
remember
is
that
there is
always
danger
inherent
in testing electrical
equip-
ment
which
operates
at
hazardous voltages. There-
fore,
the
operator
should
thoroughly familiarize him-
self with
the
equipment
under
test before working
on it,
bearing
in
mind
that
high voltages
may
appear
at
unexpected
points in defective
equipme~t.
Addi-
tional
precautions
which
experience in
the
industry
has
shown
to
be
important
are listed below.
1.
It
is good
practice
to
remove power before
connecting
test
leads
to
high-voltage points.
If
this
is impractical,
be
especially careful to avoid acci-
dental
contact with
equipment
racks
and
other
ob-
jects which
can
provide a ground.
Working
with
one
hand
in your pocket
and
standing
on
a properly
insulated
Hoor
lessens the
danger
of shock.
2. Filter capacitors may store a
charge
large
enough
to
be
hazardous. Therefore,
discharge
filter
capacitors before
attaching
test
leads.
3.
Remember
that
leads with
broken
insulation
provide
the
additional
hazard
of high voltages
ap-
pearing
at
exposed points along
the
leads.
Check
test leads for frayed or broken insulation before
working
with
them.
4. To lessen
the
danger
of accidental shock,
disconnect test leads immediately
after
test
is
completed.
.5.
Remember
that
the
risk of severe shock
is
only
one of
the
possible hazards.
Even
a minor shock
can
place
the
operator
in '-hazard of
more
serious
risks such as a
bad
fall or
contact
with
a source
of
higher
voltage.
B.
The
experienced
operator
continuously
guards
against injury
and
does
not
work on
hazardous
cir-
cuits unless
another
person is available
to
assist
in
case of accident.
ITEMS
Supplied
with
WO-33A
Direct/Low-Capacitance
Probe
and
Cable
Type
No. WG-349A
1
BX4
1
BBK7A
1 BC4
2
12AT7
1 BBR8
Instruction Booklet
Available
on
Separate
Order
1 RCA
3AQPl
For
rf
applications from
500
Kc to 250 Mc:
Demodulator
Probe ........
Type
No. WG-350A
Devices
or
arrangements
shown
or
described
herein
may
use
patents
of
RCA
or
othet's.
Information
contained
herein
is
furnished
without
responsibility
by
RCA
for
its
use
and
without
prejudice
to
RCA's
patent
rights.
TMK
®.
Marco
Registrodo
• 2 •
WQ-3]AIB(2)
3-60
Printed
in
U.S.A.
Cathode-Ray Oscilloscope
Type
WO-33A
Contents
Safety
Precautions
......................................... .
Items
Supplied
with
WO-33A
Description
Specifications
Functions
of
Controls
and
Terminals.
Operation
Initial
Procedure
Vertical-Amplifier
Operation
Horizontal-Amplifier
Operation
Sweep-Oscillator
Operation
Use
of
WG-349A
Probe
Calibration
and
Voltage
Measurement
Applications.
. .............. .
Analyzing Composite Television Waveforms
Alignment
Schematic
Diagram
of
WO-33A
...... .
General
Applications
............ .
Square-Wave
Testing of Audio Amplifiers
..
Phase-Shift Measurements
Frequency
Measurements ............................ .......
..
Industrial
Applications
........................... ,
..
Engine-Pressure Analysis
Vibration Measurements
.
Maintenance.
General
Astigmatism Adjustment
Vertical Attenuator Alignment
.............. .
Internal Calibrator Control
Adjustment...
Repair
Service
Replacement
Parts
List.
Warranty
• 3 •
Page
:\'/0,
2
2
5
6
8
8
8
8
8
9
9
..11
..........
11
14
12-13
18
18
18
19
20
20
20
21
..... 21
21
21
21
...
21
22-2.3
23
To Next Page
Loading...