Performance
Check—
Type
3B5
g.
CHECK
—
Stable
CRT
display
can
be
obtained
with
the
LEVEL
control
for
both
+
and
— slope
triggering.
h. Set
the
Trigger
Function
switch
to
INT-AC.
i.
Set
the
low-frequency sine-wave
generator
for
a
0.5
division
CRT
display
(0.5
volt
peak
to
peak) at
50
hertz.
j. CHECK—Stable
CRT
display
can
be
obtained
with
the
LEVEL
control
for both
+
and
— slope
triggering.
k.
Set
the
Trigger
Function
switch
to
INT-AUTO.
l. CHECK—Stable
CRT
display
can
be
obtained
with
the
LEVEL
control
for
both
+
and
—
slope
triggering
through
out
the complete
rotation
of
the
LEVEL
control.
5.
Check Trigger
Slope
Operation
and
Coupling
REQUIREMENT—
Stable
triggering
on correct
slope
of
input
signal and
indication
of
correct
trigger
coupling.
a.
Connect
the
indicator
oscilloscope
calibrator
output
to
the
amplifier
unit
input
connector
and
the
EXT
TRIG
INPUT
connector
with
the
BNC
T
connector
and
two
BNC
cables.
b.
Change
the
following
control
settings:
MANUAL
TIME/DIV
2
ms
LEVEL
Midrange
Trigger Function
INT-AUTO
Volts/Division
(amplifier
unit)
2
Volts
c.
If
the
+
slope
light is
not
on,
press the
CHANGE
SLOPE
button.
d. CHECK—
CRT
display
starts
on
the
positive
slope
of
the
signal
(see
Fig. 5-1)
and
the
+
slope
light
is
on.
e.
Press
the CHANGE SLOPE button.
f. CHECK—
CRT
display
starts
on
the
negative
slope
of
the
signal
(see
Fig.
5-1)
and
the
—
slope
light
is
on.
g. Set
the
Trigger
Function
switch
to
EXT-DC.
h.
Press
the
CHANGE SLOPE
button
to
provide
+ slope
triggering.
i.
Turn
the
LEVEL
control
clockwise
until
the
display
is
not
triggered (NOT
TRIG'D
readout
on).
Then
turn
the
LEVEL
control counterclockwise
slightly
until
the
CRT
display
is
stable.
j.
Without
changing
the
LEVEL
control setting,
set
the
Trigger
Function
switch
to
EXT-AC.
k.
CHECK—
NOT
TRIG'D
readout comes
on
to
indicate
that
unit
is
not
correctly
triggered.
This
check
indicates
that
the
trigger
circuit
has
blocked the
DC
level
of
the
calibrator
signal
to
AC couple
the
trigger
signal
to
the trigger circuit.
l.
Disconnect
all
test
equipment.
6.
Check
High-Frequency
Triggering
Operation
REQUIREMENT
—
Correct
triggering at
50
kilohertz
and
20
megahertz with
minimum
deflection
or
minimum
input
voltage in all
positions
of
Trigger Function switch.
a.
Change
the
following
control
settings
MANUAL
TIME/DIV
20
ms
Trigger
Function
INT-AC
SLOPE
+
Volts/Division
(amplifier
unit)
1
Volt
b.
Connect
the
constant-amplitude
sine-wave
generator
to
the
amplifier
unit
input
connector
through
the
five-nano
second
GR
cable,
50-ohm
in-line
termination
and
the
BNC
T
connector.
Connect
the output
of
the
BNC
T connector
to
the
Type
3B5
EXT TRIG
INPUT
connector
with
a
50-ohm
BNC
cable.
Fig.
5-1. Typical
CRT display when checking trigger slope operation. (A) + slope; (B) — slope.
5-3
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...
