Calibration—Type
3B5
horizontally
and
two
to
six
divisions
vertically
(may
vary
due
to
calibration of
front-panel adjustments).
e.
Connect
a
jumper
lead
(#18
or
#20
wire)
between
terminals
4
and 22
of
the amplifier
unit program
connector
f. CHECK
—
Both
the
amplifier
unit
and
the
Type 3B5
seek
a
stable
CRT
display
(units
continuously
recycle
approximately
every two
to
four
seconds).
g.
Disconnect
the
jumper
lead.
h.
Press
the
front-panel
seek
button
on
the
amplifier
unit,
i.
CHECK—Only
the
amplifier
unit
seeks.
j.
Press
the
front-panel
SEEK
button
on
the
Type
3B5.
k.
CHECK
—
Only
the Type
3B5
seeks
a
stable
display.
l.
Connect
a
jumper
lead between
terminals
12
and
22
of
the
Type
3B5 PROGRAM
connector
(see
Fig. 6-26).
m.
CHECK—
Only
the
Type 3B5
seeks
a
stable
display
(unit
continuously
recycles
every
one
to
two
seconds).
26.
Check
Seek
Mode
Frequency
Response
a.
Connect
the
low-frequency sine-wave
generator
to
the
amplifier
unit
input
connector through
the BNC
cable
(use
the
BNC
to
alligator clips
adapter
to
connect
the
generator
output
to
the BNC
cable).
b.
Set
the
low-frequency
sine-wave generator for
about
two
volts
output at 30
hertz.
Fig.
6-26. Location
of terminals 12 and
22 of PROGRAM connector
(front
panel).
c.
Set
the
Trigger
Function
switch
to
EXT-DC.
d. CHECK—
Slowly
increase
the
output
frequency
of
the
low-frequency
sine-wave
generator
and
check
that
the
unit
progressively
seeks
the
next
faster
sweep rate,
presenting
a
stable
display
(leave
on
continuous
seek)
as
the
frequency
is
increased.
Allow
time
for
the
seek circuits
to
recycle
(about
one
to
two
seconds)
before
increasing
the
frequency.
Check
from
30
hertz
to
2 megahertz.
e.
Disconnect
the
low-frequency sine-wave
generator
and
connect
the
time-mark
generator
to
the amplifier
unit through
the
50-ohm
BNC
cable
and
the
50-ohm
termination.
f. Set
the
time-mark
generator for 50-nanosecond
markers
(20
MHz
sine
wave;
this
check
can
only
be
made
with
an
amplifier
unit
which
has
a
bandwidth
of
at
least 15
MHz).
g. CHECK
—
A
stable
CRT
display is presented
(about
20
cycles
displayed;
readout-panel
indication,
.1
/xs/DIV)
before
the
seek circuits recycle.
h.
Disconnect
the
jumper
lead
and
set
the
Trigger Function
switch
to
INT-AUTO.
27.
Check
Multitrace
Sync Pulse
a. Connect
the
10X
probe
tip to
pin
connector
AV
on
the
Time-Base
Board
(see
Fig.
6-27A).
b.
Set
the
test
oscilloscope
for
a
vertical
deflection
of
0.2
volts/division
(2
volts/division
including
10X probe) and
the
sweep
rate
to
50
microseconds/division.
c.
Set
the
MANUAL
TIME/DIV
switch
to
10
μ
s.
d. CHECK
—
Test
oscilloscope
display
for
positive
and
nega
tive
going pulses
of
about
2.5
divisions
(about
five
volts;
see
Fig.
6-27B).
28. Check
Delayed
Sweep
Magnifier
Intensifier
Levels
a.
Connect
the 10X probe
tip
to
pin
connector
X
on
the
Time-Base
Board
(see
Fig. 6-28A).
b.
Set
the
test oscilloscope
for
a
vertical deflection of 0.2
volt/division
(2
volts/division
including
10X probe), the
sweep
rate
to
one
millisecond/division,
input
coupling
to
DC
and
set
the
triggering
controls
for
a
free-running
display.
c.
Establish
the
zero-volt level
on
the
test
oscilloscope
CRT.
Position
the
trace
so
the
zero-volt level
is
at
the top
of
the
display
area.
d.
Set
the
MANUAL
TIME/DIV
switch
to
5
s
(reduce
the
intensity
level
to
protect
the
CRT).
e. CHECK
—
Test
oscilloscope
display
for
a
trace
about
six
divisions
below
the
zero-volt
level
(
—
12
volts;
see
Fig. 6-28B).
f.
Set
the
DLY
’D
SWP
MAG
switch
to
X10.
6-25
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...