Operating
Instructions
—
Type
3B5
Auto
Trigger
(not
labeled)
Light
indicates
that
sweep is triggered
in
the
auto
trigger
mode.
LEVEL
Normal
Triggering
—
Selects
amplitude
point
on
trigger
signal where
sweep
is
triggered.
Auto
Triggering
—
Selects trigger level
which
is
always
within
the
peak-to-peak
range
of
the trigger
signal (typically
adjustable
between
10%
and
90%).
TRIG
LEVEL
CENTERING
Screwdriver
adjustment
to
set
the
trigger
circuit
for
correct
operation
(see
Calibra
tion
procedure
for
adjustment).
MANUAL
Selects
the
sweep
rate
of
the
sweep
gen-
TIME/DIV
erator
in
the
Manual
Mode
of
operation.
When
in
Seek
Mode
operation,
mode
auto
matically
changes
from
SEEK
to
MAN
when
the
MANUAL
TIME/DIV
switch setting is
changed.
VARIABLE
Provides
continuously
variable
sweep rate
to
at
least
2.5
times the
readout
indicated
in
the
CAL
position. Sweep
rate
is
cali
brated
only
when
the
control
is
set
fully
clockwise
to
CAL.
s/DIV
readout turns
off
and
UNCAL
readout
turns
on when
VARI
ABLE
control is
not
set
to
CAL.
Mode
Controls
EXT
When
the
EXT
button
is
lit,
the
instrument
operates
in
the
External
Mode.
The
instru
ment
changes
to,
and
remains
in,
the
Exter
nal
Mode
of
operation
when
an
external
programmer
is
connected
to the PROGRAM
connector
and
a
program
is
selected.
The
External
Mode
overrides
the
other
modes.
MAN
Pushbutton
to
select
the
Manual
Mode
of
operation
(except when
EXT
light
is
on).
When
the
MAN
button
is
lit,
the
instrument
operates
in
the
Manual
Mode.
All
func
tions
can
be
controlled
by
the
front-panel
controls
in
this
mode of
operation.
The
instrument
changes
to
the
Manual
Mode of
operation
when
the
MAN
button
is
pressed,
when
the
MANUAL
TIME/DIV
switch
set
ting
is
changed
when
in
the
Seek
Mode,
or
when
the external
program is
disconnected
SEEK
Pushbutton
to
select the
Seek
Mode
of
operation
(except
when
EXT
light
is
on).
When
the
SEEK button is
lit, the
instrument
operates
in
the
Seek
Mode.
The
instrument
changes
to
the
Seek
Mode
of
operation
when
a
seek
command
is
received
from
the
front-panel
SEEK
button,
a
remote
seeking
probe
through
the
associated
auto-
matic/programmable amplifier
unit,
re
mote
seek
from
the
front-panel PROGRAM
connector
or
remote
seek
from
the pro
gram
connector of
the
associated
auto-
matic/programmable amplifier
unit.
Sweep
Controls
Delayed
Sweep
Magnifier
Controls
DELAY
Provides
variable
delay
for
the
starting
point
of
the
magnified
sweep.
May
be
delayed
between
0
and
10
divisions
from
the
start
of
the
trace.
DLY'D
SWP
MAG
Increases
sweep
rate
after
end
of
delay
period
selected
by
DELAY
control.
OFF—Normal
sweep
at
sweep
rate
indi
cated
on
readout
panel.
X10—
Sweep
rate
increased
10
times
after
end
of
delay
period
(for
basic sweep
rates
of
1
μ
s/DIV
or slower). MAG'D
SWP
readout
lights and
the
sweep-rate
readout
is
corrected
for
the
magnified
sweep
rate.
XI
00
—
Sweep
rate
increased
100
times
after
end of
delay
period
(for
basic
sweep
rates
of
10
μ
s/DIV or
slower).
MAG'D
SWP readout
lights
and the
sweep-rate
readout
is
corrected
for
the
magnified
sweep
rate.
External
Program
PROGRAM
37-terminal
connector
for external
pro
gramming
of
the
unit.
Also
provides out
put
and
input
connections
for
various
other
instrument
functions.
Readout
Panel
MAG'D
SWP
Indicates
that
the
sweep
rate
is
magnified.
The
sweep
rate
readout
is automatically
corrected
to
indicate
the
magnified
sweep
rate.
CAL
Screwdriver
adjustment
to
set
the
horizontal
gain
of
the
unit.
Used
to
set
basic
timing
of
this
unit
and
to
compensate
for
the dif
ferences
in CRT
deflection
factor when
changing
indicator
oscilloscopes.
NOT
TRIG'D
UNCAL
Indicates that
sweep circuits
are
not
trig
gered.
CYCLES/SWEEP
Screwdriver
adjustment
to
select
the
nomi
nal
number
of
cycles
displayed
in
the
Seek
Mode
of
operation.
POSITION
Controls
horizontal
position
of
trace.
Indicates that
VARIABLE
control
is
not
in
CAL
position.
s/DIV
readout
turns
off
when UNCAL
readout
is
on.
.
-
5
-
1
-
2
-
0
-
m
-
μ
. -
s/DIV
Indicates
sweep
rate
in
all
modes
of
opera
tion.
Automatically corrected
when
sweep
is magnified.
2-3
Summary of Contents for 3B5
Page 4: ...Fig 1 1 Type 3B5 Automatic Programmable Time Base unit Type 3B5...
Page 15: ...Operating Instructions Type 3B5 TYPE 3B5 CONTROL SET UP CHART Fig 2 2 Control set up chart 2 7...
Page 48: ...CO I o Fig 3 13 Delay and Timing Circuit logic block diagram Circuit Description Type 3B5...
Page 61: ...GO i GO GO Fig 3 22 Seek Ciicuit Logic block diagram Circuit Description Type 3B5...
Page 70: ...u k KJ Fig 3 29 Circuit conditions for Manual Mode operation Circuit Description Type 3B5...
Page 71: ...w K w Fig 3 30 Circuit conditions for Seek Mode operation Circuit Description Type 3B5...
Page 72: ...w I u U Fig 3 31 Circuit condition for External Mode operation Circuit Description Type 3B5...
Page 88: ...Maintenance Type 3B5 Fig 4 9 Location of components on Logic Card 4 14...
Page 89: ...u Oi Fig 4 10 Location of components on Counter Card Maintenance Type 3B5...
Page 92: ...NOTES I...
Page 104: ...NOTES...
Page 106: ...Calibration Type 3B5 Fig 6 1 Recommended calibration equipment...
Page 160: ......
Page 176: ...J400 RtADOUT BOARD 3B5 PLUG IN A READOUT...
Page 182: ...397 R E A D O U T B O A R D 10 6b READOUT BOARD...
Page 184: ...FIG 1 FRONT SWITCHES TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE...
Page 185: ...FIG 2 CHASSIS REAR 3 GS to TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE...
Page 186: ...OPTIONAL ACCESSORIES...
