Operating
Instructions
—
Type
3B5
(A) Unmagnified
Display
(B)
Area of interest
displayed by delay magnifica
tion
(10X magnification).
Fig.
2-13. Displaying a complex signal using delayed sweep mag
nification.
the
start of
the
magnified
portion
by
a
selected
amount
following
the
event which
triggers the
Sweep
Generator.
Then,
the
part
of
the
waveform
which
contains
the informa
tion
of
interest
can
be
displayed.
Use
the
following
proce
dure:
1. Connect
the
signal
to
the
amplifier
unit
input connector.
2. Set
the
volts/division
switch
to
produce
a
display about
four
divisions in amplitude.
3. Set
the
MANUAL
TIME/DIV
switch
to
a
sweep
rate
which
displays
the
complete waveform.
4. Adjust
the
Trigger controls
for
a
stable
display.
5.
Set
the
DLY'D
SWP
MAG
switch to
X10
or X1
00.
6. Adjust
the
DELAY
dial
to
position
the
start
of
the
mag
nified
portion
to
the
part
of
the
display
to
be magnified.
7.
If
necessary,
adjust
the
Type
3B5
POSITION
control
to
display
the
complete magnified portion.
8.
Time
measurements
can
be
made
on
this
portion
of
the
display in
the
normal
manner. The
magnified
sweep
rate
is
indicated
on
the
readout
panel.
Example. Fig.
2-13A
shows
a
complex
waveform
as
dis
played
on
the
indicator oscilloscope
CRT.
The
circled
portion
of
the waveform
cannot
be
viewed
in
any
greater detail
because
the
sweep
is
triggered
by
the
larger amplitude
pulses at
the
start
of
the
display and a
faster
sweep
rate
moves
this
area
of
the
waveform
off
the viewing
area.
The
second
waveform
shows
the
area
of
interest
magnified
10
times
with
the
delayed sweep
magnifier.
The
DELAY
dial
has
been
adjusted
so
the
magnifier
starts
just
before
the
area
of
interest.
The
display
has
been
repositioned
with
the
POSITION
control
to
view
the
entire
magnified
portion.
Pulse
Jitter Measurements
In
some
applications
it
is
necessary
to
measure
the
amount
of
jitter
on
the leading edge
of
a
pulse
or
jitter
between
pulses.
Use
the
following
procedure:
1.
Connect
the
signal
to
the
input
connector
of
the
ampli
fier
unit.
2. Set
the
amplifier
unit
volts/division
switch
to
display
about
five
divisions
of
the
waveform.
3.
Set
the
Type
3B5
Trigger
controls
to
obtain
as
stable
a
display as possible.
4. Set
the
MANUAL
TIME/DIV
switch
to
the
fastest
sweep
rate
that
displays
the
pulse.
5.
Adjust
the
amplifier
unit position control
to
move
the
portion
of
the
pulse
where
jitter
is
to
be
measured
to the
center
horizontal line.
6. Set
the
DLY'D SWP
MAG
switch
to
X10
or X100.
7.
Set
the
DELAY
control so
the
pulse is magnified.
8. Pulse
jitter is
shown
by
horizontal movement
of
the
pulse
(take
into
account
inherent
jitter
of
delayed
sweep
magnifier).
Measure
the amount
of
horizontal
movement.
Be
sure
the
VARIABLE
control
is
set
to
CAL.
9.
Multiply
the
distance
measured
in
step
8
by
the
sweep
rate
indicated
on
the
readout panel
to obtain
pulse jitter
in
time.
Example.
Assume
that
the
horizontal
movement
is
0.5
divisions
(see
Fig.
2-14),
and the
indicated
sweep
rate
is
.5
μ
s/DIV
(X100
magnification).
Using
the
formula:
horizontal
indicated
Pulse
Jitter
=
jitter
X
sweep
(divisions)
rate
Substituting
the
given
values:
Pulse
Jitter
=
0.5
X
0.5
μ
s
The
pulse
jitter
would
be
0.25
microseconds.
2-18
Содержание 3B5
Страница 4: ...Fig 1 1 Type 3B5 Automatic Programmable Time Base unit Type 3B5...
Страница 15: ...Operating Instructions Type 3B5 TYPE 3B5 CONTROL SET UP CHART Fig 2 2 Control set up chart 2 7...
Страница 48: ...CO I o Fig 3 13 Delay and Timing Circuit logic block diagram Circuit Description Type 3B5...
Страница 61: ...GO i GO GO Fig 3 22 Seek Ciicuit Logic block diagram Circuit Description Type 3B5...
Страница 70: ...u k KJ Fig 3 29 Circuit conditions for Manual Mode operation Circuit Description Type 3B5...
Страница 71: ...w K w Fig 3 30 Circuit conditions for Seek Mode operation Circuit Description Type 3B5...
Страница 72: ...w I u U Fig 3 31 Circuit condition for External Mode operation Circuit Description Type 3B5...
Страница 88: ...Maintenance Type 3B5 Fig 4 9 Location of components on Logic Card 4 14...
Страница 89: ...u Oi Fig 4 10 Location of components on Counter Card Maintenance Type 3B5...
Страница 92: ...NOTES I...
Страница 104: ...NOTES...
Страница 106: ...Calibration Type 3B5 Fig 6 1 Recommended calibration equipment...
Страница 160: ......
Страница 176: ...J400 RtADOUT BOARD 3B5 PLUG IN A READOUT...
Страница 182: ...397 R E A D O U T B O A R D 10 6b READOUT BOARD...
Страница 184: ...FIG 1 FRONT SWITCHES TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE...
Страница 185: ...FIG 2 CHASSIS REAR 3 GS to TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE...
Страница 186: ...OPTIONAL ACCESSORIES...
