Calibration
Procedure—
Type
535A
(see
Fig.
6-6) and ground and rotate the potentiometer full
left.
Now, rotate the
control slowly to the right until a trace
first appears
and note the meter reading at this point. Next,
continue to
rotate this
control
until the trace brightens and
again
note
the meter reading. Finally, set
the PRESET AD
JUST control to
obtain a
meter
reading midway between
the
two previously noted meter readings.
Fig.
6-7.
Time Base B Triggering Circuit Test Points.
10.
‘B
’ Triggering Level
Set
the HORIZONTAL
DISPLAY
switch at B.
Place the B'
TRIGGERING
MODE
switch at DC and the ’B' TRIGGER
SLOPE
switch at
-f-INT.
Set the B'
TRIGGERING LEVEL
control at
zero and the B' STABILITY
control full left, but
not to
the PRESET position. Connect the voltmeter between
ground
and the junction of R69 and R70 (see Fig. 6-7). Set
the voltmeter on the
lowest range and adjust the 'B' TRIG
GERING
LEVEL
control
for
a meter reading of exactly
ZERO
volts. If the TRIGGERING LEVEL knob does not read
exactly
at
the zero position, loosen the set screw, and re
position the knob.
The voltmeter
should read zero when
the TRIGGERING
LEVEL control is set at zero.
Use
10X Probe with test scope set to .5 VOLTS/CM and
TIME/CM
to .5
MILLISEC. Now, connect the probe tip
to
pin
6
of V95. (see Fig. 6-7), and carefully adjust the Trig.
Level
Centering (see Figures 6-2
and 6-7) control to the cen
ter
of
the
area which gives a square-wave of approximately
1.5
cm.
Rotate the TRIGGER SLOPE switch back and forth
between
+ EXT. and —EXT. and, if necessary, slightly re
adjust
the Trig. Level Centering control for a
completely
stable
pattern
in both positions of the switch.
13. ‘
B’
Preset Adjust
Place
the B'
TRIGGERING MODE switch at AUTO
and
the
B' TRIGGER SLOPE switch
at +LINE. Connect the de
voltmeter
between ground and the junction of R214 and
SW60B
(see Fig.
6-7),
and rotate the B’ PRESET ADJUST con
trol full (eft.
Now, rotate
the control slowly to the right until
a
trace
first appears, and note the meter reading at this
point.
Next, continue
to rotate this control until the trace
brightens,
and again
note the meter
reading. Finally, set
the
PRESET ADJUST control to obtain a meter reading mid
way
between the two previously noted readings.
14.
Adjust
5X
Magnifier Gain
Set
controls as follows:
TRIGGER SLOPE (B)
+INT.
TIME/CM
(B)
1
MILLISEC
Connect
1
millisecond and 100 microsecond markers from
the Type 180A
to the vertical input and adjust the 'B' trig
gering for
a
stable
display. If necessary adjust Mag. Gain
(see
Top View Fig.
6-3) to display 1 large marker every
5
cm, and
2
small
markers every cm. Position the display
horizontally
to observe linearity on both ends. Check that
the neon
lamp lights
when MAGNIFIER is switched on.
11.
‘B
’
Internal
Triggering DC Level
Set the
“B" STABILITY
for a free-running sweep, the
TRIG
GER SLOPE to
— INT., and the TRIGGERING MODE to DC.
Position
the trace to the center
of the graticule and connect
the
d
c
meter between ground
and the junction of R72 and
SW60A
(see
Fig. 6-7). Set the meter on the lowest voltage
range,
and adjust the Int. Trig.
DC Level (see Right Side
View,
Fig. 6-2)
control for exactly
zero voltage.
1
2.
‘B’ Trigger
Level Centering
Set
B'
TRIGGERING MODE
switch to AC and TRIGGER
SLOPE
to —EXT. Use a clip lead to
ground the junction
of R69 and
R70 (see Fig.
6-7). Connect a jumper from CAL.
OUT to 'B' TRIGGER
INPUT,
and set CALIBRATOR
to .2 volt.
15.
Adjust
Sweep Magnifier Registration
With the
MAGNIFIER
ON, position the display so that
the
first time marker is directly behind the center graticule
line.
Turn the
MAGNIFIER OFF and adjust Norm./Mag.
Regis, (see Top
View Fig. 6-3)
so that the first time marker
again
falls directly behind
the
center graticule
line.
16.
Adjust
External Horizontal DC Balance
Connect
a
jumper from
the A'
SAWTOOTH to the verti
cal
INPUT,
switch the
HORIZONTAL DISPLAY to EXT.
XI and
turn
‘A’
STABILITY full right. Turn
the HORIZONTAL POSI
TION
control to the left to position a vertical trace to the
left
vertical
graticule line. Now, adjust
the Ext. Horiz. DC
Bal.
(see Right Side View, Fig.6-2) control for no horizontal
6-6
Summary of Contents for 535A
Page 2: ......
Page 4: ...Type 535A ...
Page 28: ...Circuit Description Type 535A 4 2 Fig 4 1 Simplified Type 535A Vertical Amplifier ...
Page 30: ...Circuit Description Type 535A 4 4 Fig 4 2 Simplified Time Base Trigger Circuit ...
Page 32: ...Circuit Description Type 535A Fig 4 3 Simplified Time Base Generator 4 6 ...
Page 34: ...Circuit Description Type 535A 4 8 Fig 4 4 Simplified Delay Pickoff Circuit ...
Page 38: ...Circuit Description Type 535A Fig 4 6 Simplified Alternate Trace Operation Circuitry 4 12 ...
Page 39: ...Circuit Description Type 535A 4 13 ...
Page 41: ...Circuit Description Type 535A Fig 4 8 Simplified Low Voltage Power Supply 4 15 ...
Page 42: ...Circuit Description Type 535A 4 16 Fig 4 9 Simplified Calibrator Circuit ...
Page 44: ...Circuit Description Type 535A Fig 4 10 Simplified Cathode Ray Tube Circuit 4 18 ...
Page 126: ...MRU ll IG 61 O Z ...
Page 138: ...C897 R896 R891 R890 R889 R888 R887 R886 R885 AMPLITUDE CALIBRATOR SWITCH Bottom View 535A A ...
Page 143: ...FIG 1 FRONT SWITCHES TVDC COCA ocril I iCrODC ...
Page 144: ...70 ...
Page 145: ...1 FIG 3 SWEEP CHASSIS HIGH VOLTAGE BOARD DELAY SWEEP CHASSIS ...
Page 146: ...1 FIG 4 POWER CHASSIS RECTIFIER MOUNTING PLATE A ...
Page 147: ...3 34 79 ...
Page 148: ...TYPE 535A OSCILLOSCOPE ...
Page 149: ......
Page 150: ...FIG 7 CABINET FRAME RAILS ...
Page 152: ...FIG 8 STANDARD ACCESSORIES 6 TYPE 535A OSCILLOSCOPE ...
