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Section
1-465
465
SPECIFICATIONS
Introduction
The
465
Oscilloscope
is
a wide-band, portable oscillo-
scope designed
to
operate
in a wide range
of
environmental
conditions. The
instrument
is
light
in
weight and
compact
of
design for ease
of
trans;:iortaion,
yet
capable
of
perform-
ance necessary for accurate high-frequency measurements.
The dual-channel, DC-to-100 megahertz vertical deflection
system provides calibrated
deflection
factors from 5 milli-
volts
to
5 volts/division. The
bandwidth
limiting switch
reduces interference from signals above
about
20 megahertz
for viewing low-frequency, low-level signals.
The trigger circuits provide stable sweep triggering
to
beyond
the
bandwidth
of
the
vertical deflection system.
Separate
controls
are provided
to
select
the
desired mode
of
triggering for
the
A and B sweeps.
The
A sweep can be
operated
in
one
of
three
modes:
automatic
triggering,
normal triggering, or single sweep. A variable trigger
holdoff
control provides
the
ability for A sweep
to
trigger stably on
aperiodic signals
or
complex
digital words.
The
horizontal
deflection system has calibrated sweep rates from
0.5
VERTICAL
DEFLECTION
SYSTEM
Deflection Factor
Calibrated range
is
from 5 millivolts
to
5 volts per
division
in
10
steps
in
a 1-2-5 sequence. Accuracy
is
within 3%. Uncalibrated VAR
control
provides deflec-
tion factors
continuously
variable between
the
calibrated
settings,
and
extends
deflection factor
to
at
least
12.5
volts per division
in
the
5 volts/div position.
Frequency
Response
Bandwidth
in
both
Channel 1
and
Channel 2
is
DC
to
at
least
100
megahertz. Risetime
is
3.5
nanoseconds
or
less.
The AC-coupled lower
-3
dB
point
is
10
hertz
or
less
(1
hertz
or less
when
using a
10X
probe).
Vertical system
bandwidth
with
the
BW
LIMIT
pushbutton
pulled
is
approximately
20
megahertz.
Chopped Mode Repetition Rate
Approximately
250
kilohertz.
Input
Resistance
And Capacitance
®
One megohm
within
2%
paralleled by
approximately
20
picofarads.
·
......
second
to
0.05
microsecond/division. A
X10
magnifier
increases each sweep rate by a
factor
of
10
to
provide a
maximum sweep rate
of
5 nanoseconds/division
in
the
0.05
µs
position. The delayed
and
mixed
sweep features
allow
the
start
of
the
B sweep
to
be delayed a selected
amount
from
the
start
of A sweep
to
provide accurate
relative-time measurements. Calibrated X-Y measurements
can be made with Channel 2 providing
the
vertical
deflection and Channel 1 providing
the
horizontal
deflec-
tion
(TIME/DIV switch fully
counterclockwise
and
VERT
MODE switch
to
CH
2). The regulated
DC
power
supplies
ensure
that
instrument
performance
is
not
affected
by
variations
in
line voltage and
frequency.
Maximum power
consumption
of
the
instrument
is
approximately
75
watts.
The following
instrument
specifications apply over an
ambient
temperature
range
of
-15°
C
to
+55° C unless
otherwise specified. Warm-up
time
for specified accuracies
is
20
minutes. The calibration
procedure
given in section 5,
if
performed
completely,
will allow an
instrument
to
meet
the
electrical characteristics listed below.
Maximum
Input
Voltage
DC
coupled:
250
V
(DC+
Peak AC)
or
500
VP-PAC
at
1 kHz or less.
AC coupled:
500
V (DC + Peak AC)
or
500
VP-PAC
at
1 kHz
or
less.
Cascaded
Operation (CH 1
VERT
SIGNAL
OUT
Connected to CH 2
OR
Y)
Bandwidth
is
DC
to
at
least
50
MHz with a sensitivity of
at
least 1 mV/division.
TRIGGERING
Sensitivity
DC
Coupled:
0.3
division internal
or
50
millivolts
external from
DC
to
25
megahertz, increasing
to
1.5
divisions internal
or
150
millivolts external
at
100
megahertz.
AC Coupled:
0.3
division internal
or
50
millivolts
external from
60
hertz
to
25
megahertz, increasing
to
1.5 divisions internal
or
150
millivolts external
at
100
megahertz.
Attenuates
all signals below
about
60
hertz.
1-1
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