Kenwood CS-5230 User manual

40MHz READOUT OSCILLOSCOPE
CS-5230
40MHz OSCILLOSCOPE
CS-5235
SERVICE MANUAL
KENWOOD CORPORATION
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WARNING
The following instructions are for use by qualified personnel only. To avoid
electric shock, do not perform any servicing other than contained in the
operating instructions unless you are qualified to do so.
CONTENTS
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PARTS LIST (ELECTRICAL)
SCHEMATIC DIAGRAM ...........cccesseeseeers
P.C. BOARD ........seccssssssssccssetssesseseussenessensecsersensecsesnessseneuseessensesneeeseassnessesasnenseeateansnes
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SPECIFICATIONS
Type
150
mm
rectangular
tube
with
an
integral
graticule
Acceleration
voltage
Approx.
12
kV
Effective area 8 X 10 divisions (1 division = 10 mm)
VERTICAL AXIS (COMMON TO CHANNELS 1 AND 2)
Sensitivity
(+10
to
+85°C)
;
1
mV,
2
mV/div
:
+5%,
5
mV
to
5
V/div:
43%
Attenuation
1-2-5
steps,
12
ranges,
fine
control
between
ranges
Input
impedance
1
MQ
+
2%,
approx.
25
pF
5mV to 5V/div DC : DC to 40 MHz
AC : 5Hz to 40 MHz
DC: DC to 20MHz, AC: 5Hz to 20MHz
Frequency
response
(-3 dB)
(+10 to +35°C)
Rise time
(+10 to +35°C)
Signal
delay
time
The
leading
edge
may
be
checked
using
a
square
wave
of
the
rise
time
less
than
that
of
this
model.
Crosstalk -40 dB or less (at 1 kHz)
A\Maximum input voltage 500 Vp-p or 250 V (DC+AC peak, 1 kHz or less)
VERTICAL AXIS (CH3)
Sensitivity (+10 to +385°C) 0.1 V/div: =3%
InV to 2mV/div
5mV to 5V/div Approx. 8.8 ns
ImV to 2mV/div Approx. 17.5 ns
Input impedance IMQ + 2%, approx. 25 pF
Fre c sponse (-3 dB
eroapency rgsnayse C8 a) DC to 40 Mii
Rise time (+10 to +35°C) Approx. 8.8 ns
Signal delay time The leading edge may be checked using a square wave of the
rise time less than that of this model.
A\Maximum input voltage 100 Vp-p or 50 V (DC+AC peak, 1 kHz or less)
Operat
ion
Single
trace:
CHl,
CH2,
CH3
or
ADD
single
trace
operation
Multi-trace
:
2
to
4
traces
of
CH1,
CH2,
CH3
and ADD
ALT/CHOP: Display by selecting ALT and CHOP
ADD : Composite waveform of CHI and CH2 signals are
displayed.

SPECIFICATIONS
Chop frequency Approx. 250 kHz (in multi-trace operation)
Channel polarity Normal or inverted, CH2 only inverted
Horizontal axis (CH2, except for 10 MAG operation)
Sensitivity (+10 to +35°C) Same as vertical axis (CH2)
Input impedance Same as vertical axis (CH2)
Prequency respguse €3 dB) DC: DC to 1 MHz, AC: 5 Hz to 1 Miz
X-Y phase difference 1 3° or less at 100 kHz
Operation mode X-Y mode is selected with H. MODE
CHI: Y-axis, CH2: X-axis
AMaximum input voltage Same as vertical axis (CH2)
SWEEP
Sweep types : A sweep
ALT : Alternate A sweep and B sweep
B : B sweep
X-Y : X-Y oscilloscope operation
Sweep time | A sweep 0.5s to 0.1 us/div
(410
to
+85°C)
+3%
1-2-5 steps,
21 ranges,
fine adjustment
between ranges
B
sweep
ee
to
0.1
us/div
x
0
1-2-5 steps,
18 ranges,
fine adjustment
betwen ranges
meee prado er aaa x10 + 5% (48% for over 0.5 ns/div)
Linearity (+10 to +35°C)
+3% (5% in X10 MAG operation)
HOLDOFF Continuously variable from A sweep NORM position
Trace
Separation
B
sweep
is
continuously
variable
by
+4
divisions
or
more
with
respect
to A
sweep.
Delayed sweep operation Continuous delay operation (AFTER DELAY)
Synchronous delay operation (B TRG'D) : Synchronous with
the trigger signal
Delay
time
Continuous
control
by
0.2
to
10
divisions
for 0.5
div
to
maximum
speed
sweep
[CS - 5230] :
+(3% of set value+1% of full scale)+(0 to 300 ns)
[CS - 5235] :
Reading on CRT +4% (0 to 300 ns)
Delay time error
(+10 to +35°C)
Delay jitter
10000 : 1 of a value 10 times as high as A sweep setting

SPECIFICATIONS
TRIGGERING
,
Trigger
modes
AUTO
:
Automatic
free
running
with
no
signal
NORM : Triggered sweep
FIX : Sweep at triggering point set to center of signal
amplitude
SINGLE: Single sweep mode
RESET : Restarting single sweep operation
VERT: Input signal selected for V. mode
CH1 : Channel 1 input signal
CH2 : Channel 2 input signal
CH3 : Channel 3 input signal
: Commercial power line
Trigger signal sources
AC : AC coupling from 10 Hz
HFrej : Low-pass filter coupling up to 30 kHz
DC : DC coupling
TV FRAME: Composite video signal, vertical synchronization
separation
TV LINE : Composite video signal, horizontal synchroni-
zation separation
Trigger coupling
(For trigger sensitivity,
see the table below. )
Trigger sensitivity (+10 to +35°C)
Sensitivity
(Amp1itude)
10Hz to 20MHz Idiv
10Hz to 30kHz Idiv
DC to 20MHz Idiv
20M to 40MHz 1. 5div
HDTV HDTV video signal
AUTO
:
Same
as
above
specifications
for
above
40Hz.
(The table shows the sensitivities in terms of the amplitude displayed on the CRT. )
Qmin. for the HFrej sensitivity shows that the amplitude necessary for synchroniza-
tion increases. )
COUPLING
Signal
frequency
FIX * : Same as above specifications for above 50Hz.

SPECIFICATIONS
CALIBRATION SIGNAL : POSITIVE SQUARE WAVE, 1 Vp-p 23%, APPROX. 1 kHz
100 Vp-p or 50V (DC+AC peak)
Input impedance
(+10 to +385°C)
AMaximum input voltage
CHi OUTPUT SIGNAL (WITH 50
Q LOAD)
Output voltage Approx. 50 mVp-p/div
Frequency 100 Hz to 20 MHz
response
(-3dB) | 5 mV to 100 Hz to 40 MHz
TRACE ROTATION : TRACE ANGLE 1S ADJUSTABLE WITH A SEMI-FIXED CONTROL ON PANEL.
POWER SUPPLY
Voltage 100/120/220/230 VAC + 10 %
50 Hz or 60 Hz
Power
consumption
Approx.
43
W,
39
W
Approx.
52VA,
49VA
DIMENSIONS AND WEIGHT (VALUES ENCLOSED IN PARENTHESES INCLUDE PROJECTIONS. )
300 mm (300 mm)
150 mm (172 mm)
400 mm (469 mm)
Frequency
Aprrox. 8.7 kg
OPERATING TEMPERATURE AND H
Operating temperature and
humidity
Storage temperature and
humidity
UM | DITY
0 to 40°C, 85% RH or less
—20 to 70°C, 85% RH or less
ACCESSORIES
Probe
PC-33 : 10 MQ +1%, 22 pF+ 10%, 10: 1 [CS-5230]
PC-35 : 10 MQ 1%, 19.5 pF+ 10%, 10: 1 [CS-5235]
Instruction manual 1 copy
Adjusting screwdriver
a
Replacement fuse 1 AX2 (for 100 V area)
630 mAX2 (for 200 V area)

SPECIFICATIONS
[The
specifications
shown
below
do
not
apply
to
the
CS-5235.]
READOUT
CH1
and CH2
scale
factors
(with
probe
detection),
CH3
scale
factor
(0.1
V/div
fixed,
with
no
probe
detection),
V-UNCAL,
ADD,
INV,
A/B
sweep
scale
factors
(MAG-converted),
sweep
-
UNCAL,
DELAY
TIME,
TRIG’D,
X-Y
Set values
AV1
:Displayed
in
voltage
with
conversion
according
to
CH1
scale
factor
Cursor modes
(Between AREF and A
cursors)
AV2
:Displayed
in
voltage
with
conversion
according
to
In
X-Y
mode,
only
AVI]
CH2
scale
factor
may
be
set.
AV3
:Displayed
in
voltage
with
conversion
according
to
CH3
0.1
V/div
AT
:Displayed
in
time
with
conversion
according
to
A
sweep
scale
factor
1/AT:Displayed
in
frequency
with
conversion
according
to
A
sweep
scale
factor
In
V,
H-VARI
or
RATIO:Voltage
ratio
and
time
ratio
are
displayed,
UNCAL
mode
with
5
divisions
on
the
CRT
as
100%.
PHASE:Phase
difference
is
displayed,
with
5
divisions
on
the
CRT
as
360°
.
Resolution : 10 bits
Measuring error: +4%
Measuring range: +3.6 divisions or more vertically from
CRT center.
+4,.6 divisions or more horizontally from
CRT center.
Cursor measurement
WiThe
specifications
shown above
are
subject
to
change
without
notice.

SAFETY
SAFETY
Before connecting the instrument to a power source, care-
fully read the following information, then verify that the
proper power cord is used and the proper line fuse is installed
for power source. The specified voltage is shown at the fuse
holder of the AC inlet. If the power cord is not applied for
specified voltage, there is always a certain amount of’danger
from electric shock.
Line voltage
This instrument operates using ac-power input voltages
that 100/120/220/230 V at frequencies from 50 Hz to 60 Hz.
Power cord
The ground wire of the 3-wire ac power plug places the
chassis and housing of the oscilloscope at earth ground. Do
not attempt to defeat the ground wire connection or float
the oscilloscope; to do so may pose a great safety hazard.
The appropriate power cord is supplied by an option that
is specified when the instrument is ordered.
The optional power cords are shown as follows in Fig. 1.
Plug configuration Power cord and plug type
North American
120 volt/60 Hz
Rated 15 amp
(12 amp max; NEC)
Universal Europe
220 volt/50 Hz
Rated 16 amp
Line fuse
The fuse holder is located on the rear panel and contains
the line fuse. Verify that the proper fuse is installed by
replacing the line fuse.
Voltage conversion
This oscilloscope may be operated from either a 100 V to 230
V, 50/60 Hz power source. Use the following procedure to
change from 100 to 230 volt operation or vice versa.
1. Remove the fuse holder.
2. Replace fuse F 1 with a fuse of appropriate value, 1 amp
for 100 VAC to 120 VAC operation. 630 m amp for 220 VAC
to 230 VAC operation.
3. Reinsert it for appropriate voltage range.
4. When performing the reinsertion of fuse holder for the
voltage conversion, the appropriate power cord should
be used. (See Fig.1.)
Factory installed Line cord
instrument fuse plug fuse
Parts No. for power cord
1A, 250 V
Fast blow E30-1951-05
6 x 30 mm
North Europe
630 mA, 250 V
Slow blow 5 x 20 mm,
E30-1952-05
Other Europe
630 mA, 250 V
Slow blow 6 x 30 mm
U.K.
240 voit/50 Hz
Rated 13 amp
630 mA, 250 V
Slow blow E30-1947-05
6x 30 mm
Australian
240 volt/50 Hz
Rated 10 amp
630 mA, 250 V
Slow blow E30-1821-15
6 x 30 mm
North American
240 volt/60 Hz
Rated 15 amp
(12 amp max; NEC)
630 mA, 250 V
Slow blow
6x 30mm
Switzerland
240 volt/50 Hz
Rated 10 amp
630 mA, 250 V
Slow blow
6x30 mm
Fig. 1 Power Input Voltage Configuration

CIRCUIT DESCRIPTION
VERTICAL PREAMPLIFIER UNIT
CH1, CH2
Each of the CH1 and CH2 inputs passes through an AC/DC/GND
switch and enters the 1st attenuator (1/1, 1/10, 1/100).
The 1stattenuator is used in combination with the 2nd attenuator
(1/1, 1/2, 1/4, 1/10) and the 5-fold function of the 2nd amplifier,
to switch the 12 vertical ranges.
The head amp is composed of Q102 and U101 (Q202 and U201)
and isa 1/1 buffer amp with an input impedance of 1 megohms
and used for conversion of impedance. Q102 (Q202) is the
source-follower. This head amp is installed between the 1st and
2nd attenuators.
Starting from the 2nd amp, this unit takes the differential
amplifier configuration. The functions of U102 (U202) include
the variation and inversion functions. The variation function
allows to vary the gain continuously according to the voltage
applied to pin 5. The inversion function allows to invert the phase
according to thevoltages applied to pins 6 and 7. As this function
is provided only for CH2, CH1 is fixed. At the CH2 side, switch
is done by Q215.Q103 (0203) is the regulated current supply for
U102 (U202).
Q106 and Q107 (Q206 and Q207) form an emitter-grounded
amp.
Q108 to Q111 (Q208 to Q211) form the cascode amp of the
differential amp. The vertical position can be moved by regulating
the current applied to the emitter of Q111 (Q211) based on the
panel operation.
CH3
With CH3, the attenuator is fixed. The signal impedance is
converted by the buffer amp of source follower Q303 and
regulated current supply Q304 and the signal is sent to emitter-
follower Q305. Q305 is the signal side input stage of the
differential amp.
Emitter-follower 306 is the input stage of a constant-potential
differential amp.
The outputs from Q305 and Q306 are input to the differential
type cascode amp formed by 0307, 0308, 0310 and Q311. The
current of the cascode amp is determined by regulated current
supply Q309. The vertical position can be moved by regulating
the current applied to the emitter of Q311 based on the panel
operation.
Channel selector, delay line drive
‘As for the outputs from the position amps of the channels, only
the signal of thechannel with which the cathodes of CH1 -D104,
D105, CH2 - D204, D205, CH3 - D301, D302, D304, D305 are
turned “H” by the signals from V-MODE LOGIC is sent through
CH1 - D103, D106, CH2 - D203, D206, CH3 - D303, D306 and
transmitted to the delay line driver.
Q2 and Q3 form a feedback amp. Q1 lets the excessive bias
current flow when CH1 or CH2 is in ADD mode.
Trigger amp, trigger selector
With CH1 (CH2),the differential outputs from U102 (U202) are input
to the emitter-followers Q152 and Q153 (0252 and 0253), where
Q153 (Q253) forms a cascode amp with 0114 (Q214).
With CH3, the signal after the buffer amp is sent through the
buffer of emitter-follower 0314, feedback amp Q312 an output
as current from the collector of emitter-follower 0313.
Only the signal of the channel with which the cathode of CH1 -
D108, CH2 - D208, CH3 - D308 is turned “H” by the signal from
the trigger controller is sent through CH1 - D107, CH2 - D207,
CH3- D307 and output as current to the Horizontal unit. Q31 the
excessive bias current flow when CH1 or CH2 is in ADD mode.
CH1 OUT
The CH1 outputis sent from the collector of Q152, through emitter-
follower Q51 and output at CH1 OUT of the Final unit.
Trigger controller
The data on the trigger source set on the panel is input to pin 1
of U1 and ”H” or “L" is output at pins 4 to 8 according to the set
state.
U2 is used to switch between the data from U1 and the CRT
display data of each channel from V-MODE LOGIC. If the current
mode is not V mode, the former data is selected. If the current
mode is V mode, the latter data is selected for use in controlling
the trigger selector.
Among CH1 - U2 pin 7, CH2 - U2 pin 9, CH3 - U2 pin 12, the
terminal set with the panel is turned “H”".
V-MODE LOGIC
U3 and U4 generates a signal synchronized with the display
channel select signal from the panel and the end of horizontal
sweep, anda signal for controlling the channel selector based on
the CHOP signal. (Figure 1)
Q34 cuts off the power supply to U4 only at the instant the
channel switch is pressed, in order to prevent malfunction.
Vertical range converter
U401, U403, $102 and $202 output the vertical range, CAL and
UNCAL data by turning them into analog values using an opamp
for use as the R/O data. (Figures 3, 4)
Horizontal range converter
U402 and $401 output the horizontal range data using an opamp,
as analog values for R/O data. (Figure 5)
U404 (for main sweep), U405 (for sub-sweep) and S401 are
used to switch the reference voltage for letting the sweep
current of the 1-2-5 steps of horizontal sweep flow. (Figure 2)
FINAL UNIT
Final amplifier
The signal sent from the vertical preamp through the delay line
is input to the feedback amp of Q1 and Q2. During A ALT B
sweep, the variation of the vertical position of sweep B is
controlled by the current applied to the base of Q2 based on the
panel operation.
Q3, 4, Q105, Q106 and U1 are used to amplify the vertical signal
|

10
CIRCUIT DESCRIPTION
and U1, Q105 and 0106 are used to amplify the R/O characters.
U1 is used to switch between the vertical signal and R/O signal.
Q9-012, 0113 and Q114 are cascode-connected for use in
driving the CRT.
AC inlet, fuse
An external commercial supply voltage switch and fuse holder
are provided.
Line filter
A filter for elimination of common mode noise and normal mode
noise is provided.
CH1 OUT
The signalfrom the vertical preamp is output externally via Q201
and Q202 as a signal with 50-ohm impedance.
HORIZONTAL UNIT
Trigger
The trigger signal supplied from the Vertical unit (X73-2070) is
AC/DC coupled and the trigger level is added to it.
The obtained signal is inout to the trigger shaping circuit to
become a pulse signal.
If FIX is selected, the trigger level is fixed so that it is always
around the center of the waveform.
With TV-V, the composite video signal is separated by the V sync
separator and input to the trigger shaping circuit.
With TV-H, the composite video signal is separated by the H
sync separator and input to the trigger shaping circuit.
HFrej is used to apply a 50 kHz LPF to the trigger signal.
The polarity of the trigger pulse signal can be changed with
SLOPE +/-. The output signal is input to the sweep logic circuit.
There is an additional circuit which applies the trigger signal to
the sweep logic in case the trigger pulse signal has not been
input for a certain period and auto free-run mode has been
selected.
Sweep
When the trigger pulse is input to the sweep logic, the sweep
gate is activated and the sweep wave is output.
When the sweep wave reaches a certain level, the sweep stop
circuit is activated to close the sweep gate and end sweep.
When sweep stop is activated, the hold-off circuit is activated
and, in a certain period after it, the sweep logic enters the trigger
standby state.
The delayed sweep is performed either as the AFTER DELAY
sweep or B TRIG’D sweep.
With the AFTER DELAY sweep, the voltage level of the main
sweep wave and the voltage set with DTP are compared and
delayed sweep is performed using the result signal as the
trigger.
With the B TRIG'D sweep. sweep is triggered by the next trigger
signal input after the voltage level of sweep wave have reached
the voltage set with DTP.
In case ALT sweep is set, the main sweep and delayed sweep
are performed alternately.
Horizontal amp
This circuitry switches between the sweep wave generated in
the sweep block and the X signal and add H-POSITION.
After being magnified by 10 times if MAG has been selected, the
signal is input to the R/O switch.
Here, the R/O signal is added to the vertical signal and the signal
is amplified by the final amp to a high enough voltage level to
drive the CRT.
Intensity circuit
The Z signal is generated with the sweep gate of the main
sweep and that of the delayed sweep. During ALT sweep, a
waveform for increasing the intensity of the delayed sweep
section is generated with the main sweep. The voltage set with
the INTEN potentiometer is added to the X signal and the voltage
set with the R/O INTEN potentiometer is added to the R/O
blanking signal and they are input to the high voltage circuit.
The high voltage circuits generates the CRT cathode voltage, G1
voltage and P1 voltage based on the intensity signal and the
FOCUS potentiometer.
The cathode voltage is controlled always constant by the opamp.
For use with the after-accelerating CRT, the anode voltage is
also generated by the high voltage circuit.
Power supply
AC voltages of +14.8 V, -14.8 V, +6 V, -6 V, +67 V and +170 V
are input from the transformer, and they are turned into stable
DC voltages of respectively +12 V,-12 V, +5 V, +55 Vand +140
V, which are supplied to their respective units.
CHOP
To observe signals of multiple channels simultaneously, the
vertical amp is switched with the CHOP signal.
PANEL UNIT
This unit sends the potentiometer and switch data from the
control panel to other units.
A limiting circuit is provided to prevent the CHIP operation while
multi-channel operation is not selected even when the CHOP
key Is pressed.
The voltage setting of DTP is made by the opamp in the range
from 0 to +4 V. The CAL signal is a 1 kHz, 1 Vp-p square wave.
The intensity is controlled by the PWM based on the output from
the original oscillator of CAL.
R/O UNIT
The R/O unit (X77-1870-00) accepts the attenuator and sweep
data
sent
from
or
through
the
Panel
unit
and
outputs
character
data to be displayed on the CRT.
It
is
composed
of
the
controller
block
(U1,
U2,
U4
U6,
X1),
blanking
circuit
(U5,
U14,
U15,
X2),
A/D
converter
block
(U3,
U16,
U17)
and
character
data
output
block
(U7,
U8
U9,
U10,
U13).
The
controller
block
is
composed
of
the
1-chip
CPU
(with
built-
in
ROM),
RAM,
decoder,
ALE
and
oscillator
x
1.
The
1-chip
CPU

CIRCUIT DESCRIPTION
(U1) incorporates a ROM as descried above, and the entire unit
is controlled by the software written in this ROM. The 1-chip
CPU is operated based on X1 (10 MHz). Before the start of
operation, the reset signal is input from U18 when the power is
switched on. The 1-chip CPU incorporates 8-bit A/D converters
in the output ports, input ports and also internally, and it outputs
character data for CRT display based on the data input through
“the A/D converters.
As for the output port configuration, P40 to P47 and P30 to P33
in the circuit diagram output comparison data for an external 12-
“bit A/D converter and P34 to P37 output the control data for use
,
in switching the analog data to the external 12-bit A/D converter.
As for the input port configuration, P60 to P64 are used to
recognize the “H” or “L" level of the push switches on the panel
and input the CURSOR MODE, B TRIG'D, CH2 INV and X10
MAG signals. Among them, the CURSOR MODE switch is a
non-locking switch so a Schmitt circuit is provided before the
signal is input to the port. P50 to P57 are the analog voltage input
ports. The inputvoltage is sent to the internal 8-bit A/D converter,
converted into digital data and becomes the CRT display data.
The 1-chip CPU has a bus configuration of 8 data bus bits and 16
address bus bits. A the lower 8 bits of the address bus are also
used as the data bus bits, IC (ALE circuit |C) U6 is provided for
their separation.
In addition to above, the controller block also incudes a decoder
(U4) and memory (U2). The decoder output is supplied to the
memory as Wellas to the X latch CLK input, Y latch CLK inputand
blanking circuitblock which will be described below. The memory
functions as-the system RAM of the 1-chip CPU and also stored
CRT display data. The stored data is some of the data which has
originally been prepared in the ROM inside the 1-chip CPU; only
the data required for CRT display is stored in this memory.
Next, the blanking circuit block is composed of a4 MHz oscillator
composed of X2 and the inverter (U15), shift register (U14),
inverter (U15) and OR (U5). It outputs the Blanking (R/O BLK),
request (R/O REQ) and unblanking (R/O UBL) signals. The
signals are output at the timing synchronized with the CLK signal
from the decoder to X latch (U7) and Y latch (U8) and used to
switch the display from waveform to character or from character
to waveform and to clear the trace during switching. R/O BLKis
used to clear the trace, R/O REQ is used to switch display
between characters and traces and R/O UBL is used to illuminate
a single dot inthe character.
In synchronism with the signal outputs from the blanking circuit
block, the character data output block outputs R/O-X (character
dot position in Horizontal direction) and R/O-Y (character dot
position in Vertical direction). The character data is sent from the
memory (U2) described above to the X latch and Y latch, and the
position data is sent through the address bus.
These data arelatched simultaneously, and the latched data are
input to the respective 8-bit D/A converters (U9, U10) to be
converted into analog signals. After conversion, the obtained
analog signalsare input to analog switches U11 and U12, output
from opamp U13 as signals with 0 to 4 V amplitudes, and sent
respectively to the final amp.
The
analog
switches
are
supplied
with
the
cursor
voltages,
which
are
used
to
determine
the
CRT
screen
position
in
case
the
cursor
output
is
required.
The
relationship
between
these
voltages
and
the
CRT
screen
display
is
as
shown
in
the
following
diagram.
OV
4V
4V~-—_—————- 0V
In
addition,
there
is
an
external
12-bit
A/D
converter
for
use
as
the
means
to
input
character
data.
This
converts
the
cursor
voltages
,
sweep
time
voltage,
DTP
voltage,
etc.,
which
require
acertain
resolution
into
digital
data.
The
A/D
converter
is
formed
with
an
analog
switch
(U17),
comparator
(U3)
and
D/A
converter
(U16)
for
A/D
conversion
with
the
successive
comparison
method.
11

12
CIRCUIT DESCRIPTION
V-MODE LOGIC
When CH1 is selected with V-MODE
P12-9 CHi L
P12-8 CH2 H
P12-7 CH3 H
P12-6 ADD H
P9-5 V.CLK T T T T
U3-6 CIE T es ae
U3-9 Cop? teh) de
U3-5 Cle: 2 ee
U3-7 C2E I
Q310-C cH3 4 —W—_1___1.___1
Q311-C (CTE AND C2E)
When CH2 is selected with V-MODE
P12-9
P12-8
P12-7
P12-6
P9-5
U3-6
U3-9
U3-5
U3-7
Q310-C
Q311-C
CHI
CH2
CH3
ADD
V.CLK
C1E
C2E
CiE
C2E
CH3
(CIE AND C2E)
When CH3 is selected with V-MODE
P12-9
P12-8
P12-7
P12-6
P9-5
U3-6
U3-9
U3-5
U3-7
Q310-C
Q311-C
CHI H
CH2 H
CH3 L
ADD H
Vp ea
CE
eee ard ee L
cieE 7 I
ES
ae a
(CTE AND C2E)
Fig. 1-a
Fig. 1-b
Fig. 1-c

CIRCUIT DESCRIPTION
When ADD is selected with V-MODE
P12-9 CHi H
P12-8 CH2 H
P12-7 CH3 H
P12-6 ADD L
P9-5 ViCLK “= Sk).
U3-6 ce TT
U3-9 C2E Te oe ke
U3-5 CTE 25
U3-7 Cie 2h
Q310-C CH3 ——l
Q311-C
(CIE
AND
C2E)
Fig.
1-d
There are 16 combinations obtained from the 4 states, and it is
abnormal if all of these are “H”.
When more than one combination are used, the state is switched
at the negative going of V.CLK in the order shown below:
[| asweep | sweep |.
TAGE RANGE (Vv) | VOLTAGE (Vv) | VOLTAGE (V)
Cc
S|
.
Ae
ee
ge
Approx.
-7.6
Pol
se"
re
|
0.168
~
0.301
Approx.
-6.9
tO
ot
Ee
Te
PT
poms | | [O| | | | [ol | | 0505-0704 |
fol [fot Tol | —ars-ca —] |
| fofol | {| fofol | [ o839~1.044 |
FELL Te 1088-207
S[ pol tert tol [2-161]
| | fof fol | 1382-1584 |
| fofot | | Jofot | 15e5~1784 |
fo] [ofo] {ol Jofot | 1785-1918 |
|
[ofofo[
|
[fofofol
|
1919~2124
emp
ee
ef
eat
allt
2.12
~
2.327
a
ae
a
ed es
ae
2.328
~
2.461
Ce Soe Col eT
| fof [ol | Jo] [o] 2665-2864 |
St fol polar [ol [ot 2ass 286. |
foto; fof [ofo] Jo] 2909-3204 |
au
|
[olol-|
|
lolol
sz
sao
rot Tojotol | fotot swear] |
aus
|
[S|
Tool
lo]
lolo]
sse-s7
oous | | [ofofo] | [ofolo] — >373 | Approx.76 |
P10-6, 1
|
cneck
pons
-
“8207099
_}_ta
Fig. 2
13

CIRCUIT DESCRIPTION
@ CH1 ATT & CH2 ATT voltage check table
V-Range ( /div)
Voltage range (V)
5V 4.124 ~ 4.450
2V 3.790 ~ 4.123
1V 3.456 ~ 3.789
0.5V 3.130 ~ 3.455
2.804 ~ 3.129
2.470 ~ 2.803
50mV 2.136 ~ 2.469
1.484 ~ 1.809
5mV 1.150 ~ 1.483
2mvV 0.816 ~ 1.149
0.490 ~ 0.815
Fig. 3
CH1 CHECK POINT P23-4
CH2 CHECK POINT P23-6
@ UNCAL voltage check table
CH1 CAL | CH2 CAL | SWP CAL Voltage range (V)
> > 4.406 ~ 4.860
> CAL 3.777 ~ 4.405
th
|
CAL 0.626 ~ 1.256
CAL 0.156 ~ 0.625
Fig. 4
CHECK POINT P23-15
@ SWEEP CODE voltage check table
SWEEP TIME ( /div) Voltage range (V)
3.542 ~ 3.743
3.408 ~ 3.541
3.205 ~ 3.407
2.999 ~ 3.204
2.865 ~ 2.998
5us 2.665 ~ 2.864
2.462 ~ 2.664
2.328 ~ 2.461
2.125 ~ 2.327
1.919 ~ 2.124
1.585 ~ 1.784
1.382 ~ 1.585
5ms 1.045 ~ 1.247
2oms
ee
Fig. 5
CHECK POINT
ASWEEP P23-11
B SWEEP P23-13
50s
@ V-MODE level check table
OFF ON OFF ON OFF ON OFF
OFF OFF ON ON _ OFF OFF
OFF OFF OFF OFF ON ON
t L JL
oO
22
CH1+CH2 |-— - F- LIK:
CH2 Je rm xr rie
CH1+CH2 |o oe r|- PSs
CH1 (CH3)* CH14+CH2 |< Dez
CH1+CH2 | Ir re
CH1 CH1
* CH3 display is used when only CH3 is ON.
Fig. 6
CHECK POINT P23-4
P23-10
P24-6
@ MAG level check
CHECK POINT P23-17
Fig. 7
‘le i
@ CH2 INV level check table
CHECK POINT P23-12
Fig. 8
L
e@ B TRIG’ level check table
CHECK POINT P23-19
H Fig. 9
L
H DISPLAY voltage check table
ALT
XY
CHECK POINT P23-20
Fig. 10
e Probe voltage check table
| | Output voltage range (V) CHECK POINT
> CH1PB : P23-3
eae CH2PB : P23-5
1/10 3.176 ~ 4.196
1/100 $ 3.175 Fig. 11
e CURSOR voltage check table
rf
a
Fig. 12

wa tet ATT a
CH2 INPUT ©
CH3 INPUT @ ATT
CS-5230 BLOCK DIAGRAM
a
X73-2070-00 VERTICAL UNIT Amp
1
1
!
!
t
1
1 _
H X80-1370-00 A/4
'
I Va 4st ATT al HEAD Aup 2nd ATT and Amp POSI Amp CHANNEL DELAY LINE R/O SW
CH4 INPUT @ 1/4, 172 a103. 4 bioncres SELECTOR
T.SEP Amp
1/4. 4740 , £02 . 406 DRIVER U4, G3, 4
parte 1/4, 1740 @107, U102 L___3} 0103~106 ai.2
ao~12
17100 n20ass08 @i~-3. D2 @105, 106 aii3. 444
D301~306
TRIG
Amp
FINAL
UNIT
aii4 as Sores) SAPS eTer sea a as die (peered (Cee SSS eto a ores peser ass ness
@i52, 153
V-MODE
POSI Amp
a208~214
foSssss2sssSeeSS-S<=5 '
Y-LATCH
us |
: X-LATCH
as
—
nix
Multiplex
I|_,|
DECORDER
V FINAL
ai107. 108
i
2nd ATT
1/4. 172
1/4, 1740
POSI Amp 4
fe a305~314 3
2nd Amp
@203, 206
@207, U202
@2i6
4174, 4740
47100
mew ewe ewe eee eee
TRIG Amp
@3i2. 313
Vv
RENGE
H
RENGE
BLK
CONVERTER
CONVERTER
CIRCUIT
u4o4
U402~405
u17
US,
14,
15
4MHz GEN
x2, U15
i TRIG Amp ~ X-Amp i CReenUN
a154. 152 @304. 302 Siocae te. eC IO AP bee ee ee os) Se | SSSR BREST eR nS setee cera sce
. D301~303 pasecis | ed be ON A LOSE See e sess e sees tessa sess esces assesses
al TRETACUIT A SWEEP ‘A SWEEP :
TRIG
Coup
cracu
E
uio2
@i04
X
SELECTOR
eer
@2e. 158
6AT i
; U3. 016, 17
G3. 4, 21 Q5~7, 47, 18 | U48 $4,508 iT
VIDEO Amp i -— |
pio, ai 43 HOLDOFF
U304, @303
D345, 346
; A SWEEP
STOP
D1i04~406 U103, @102
rie | Ln HIGH VOLTS
u204, W204 LYvieee AAO mGhiE. bane
< 1 — —
a2i2. 243 1X66—-1400-00 PANEL UNIT
B SWEEP 8 SWEEP rere Be
us847 fos Qizs-128 oe AUTO FOCUS
D133, a106 Gt23~4 | adders ENTENGVA A/0 INTEN
B SWEEP DTP i
STOP cIACUIT
Ui103. a106 Q@409, 110
@103~108
,
1
au
1
t
=e
‘
1
t CHOP GEN BLK LOGIC
@Q113~446
: ai47~449 a D109~448 ie |
1
1
a=
t
1
1
!
X74-1580-00 HORIZONTAL UNIT
BLK Amp
Q201~207
D204, 202
1
'
VOLTAGE H
aNTEN REGULATOR t ROTATION re vied
D207~240 GIRCUTT, on @103, 104 as04, 102 D104, 102
u4os tn
t
1
@401~407
D401~409
X80-1370-00 D/4!
'
1
FILTER AC INLET C |
1
'
t
FINAL UNIT
POWER
TRANSFORMER
poco ctor ee ee eee ee
X80-1370
-00 C/4
FINAL
UNIT
X80-1370
-0Q0 D/ 4
CH1OUT Amp
a2014, 202
15

16
CHi1 INPUT
CH2 INPUT
CH3 INPUT
CS-5235 BLOCK DIAGRAM
pte
nn
en
nn
nnn
en
nn
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nn
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enn
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Seuss
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=
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n-ne
enn
4
1
1
i
H
t
i
1
CHAOUT
H
1X80-41370
1
i
X73-2070-01
VERTICAL
UNIT
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!
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pee
em
mmm
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C/4
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1
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1
.
1
FINAL
—
t
St
O41:
|
7
FN
1
UNIT
!
ist
ATT
HEAD
Amp
2nd
ATT 2nd
Amp
DELAY
LINE|
jj
T.SEP
A
as,"ENMo
t 1
@
474.
1740
@404,
102
41/4,
472
@4103.
106
DRIVER
:
mp
ao~s2
i
4
47400
UsL04
474.
4710
@107.
U102
a
ansoe
Qi~3.
D2
1
ai.
2
ores
706
!
'
<
:
7
:
D301~306
t
!
1
'
1
‘
TRIG
Amp
!
' !
1
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i
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Shnmesaae
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183
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fe
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ATT
2nd
ATT 2nd
Amp
|
HEAD
Am
1
@
1/4,
1740
azot.
208
1/4,
1/2
a203.
206
'
1
17100
u204
1/4.
4710
@207,
U202
1!
'
aoe
fm
Gg
re
1
‘
1
t
1
f ' {
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teehee
debe
1
=)
‘
i
HERD
Aap
POSI
A
CONTROLLER
.
@302~306
Q305~344
U1.
2
4
t
1
i]
'
i
TRIG
:
sELECT
OS
4
@34.
035
:
H
RENGE
D407.
108
1
CONVERTER
D207,
208
U404,
405
D307,
308
'
ee
(i ener cece et DE ome ee oes eer eee
oR MAG
Qi0. | peleciososcuecbennaersseveseess
| : 7
A SWEEP A SWEEP
CIRCUIT GATE u4o2, a104 x SELECT! ere guaavaea
“abi I
U3. D416, 17
|
j
es
0312
EEP
Q5~7, 47, 48
Q26, 156
H MODE ae
!
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e
SMEEP
>a
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UL05.
@407
D433,
2406
ie
@123~425
ge
‘
ae
1
CHOP
GEN
BLK
LOGIC
aiis~116
@is7~419
Di09~4418
re
s
awEee
*
STOP
CIRCUIT
u403.
a106
1
t
t
1
'
ae
X74-1580-01 HORIZONTAL UNIT
Pp
a3z01. 302
D301~303
A SWEEP
STOP
3,@
a
Reon
HIGH VOLTS
Conv
u2o1. W204
@242. 243
021141~243
ES ae et ew ee ee eee mee ne on Ie eg ee, oo |
X66-1400-01 ;
—
B/2
PANEL
UNIT
1
leecase
:
REGULATOR
0207~210
CIRCUIT
A
Udod
'
@401~407
t
D401~409
:
t
BLK Amp
@204~207
D204. 202
@4109. 110
r
!
|
1
H
H
'
POWER
1
TRANSFORMER|
1
AC
INLET
C
|
t
'
H
H
'
1
a303~
U304, @303 rtp aee4
D315, 346
—O D/4
CH10OUT Amp
@a204, 202
SY
Be ee ee we we re es we

ADJUSTMENT
To
obtain
the
best
performance,
periodically
calibrate
the
unit.
Sometimes,
only
one
mode
need
be
calibrated,
while
at
other
times,
all
modes
should
be
calibrated.
When
one
mode
is
calibrated,
it
must
be
noted
that
the
other
modes
may
be
affected.
When
calibrating
all
modes,
perform
the
calibration
in
the
specified
sequence.
The
follewing
calibration
required
an
accurate
measuring
in-
_
strument
and
an
insulated
adjusting
flat
blade
screwdriver.
If
they
are
not
available,
contact
your
dealer.
For
optimum
adjustment,
turn
the
power
on
and
warm
up
the
scope
suffi-
_
ciently
(more
than
30
minutes)
before
starting.
Before
calibrating
the
scope,
check
the
power
supply
voltage.
TEST EQUIPMENT REQUIRED
The following instrument or their equivalent should be used
for making adjustment.
Test Minimum
Equipment Model Specification
Bed
;
Impedance:
More
than
Digital
Multi-|_
DL-712_
|
49
MQ,
Measuring
range:
Meter (KENWOOD) | 0.2 V to 1000 V
4.
Frequency: 10 Hz to
Sine-Wave 6518
10 MHz, constant voltage
Generator (YHP) | over tuning range
Frequency: 50 kHz to
Sine-Wave SG-503 | 100 MHz, Output impedan-
Generator (Tektronix) | ce: 50 0, constant voltage
over tuning range
Output signal: 1 kHz,
Amplitude: 10 mVp-p to
Square- PG-506 10 Vp-p, Accuracy: within
Wave (Tektronix) +1%, Rise time: 35ns or
Generator EKTONIX! | tags
100 kHz, Rise time: 1 ns or
less
4343B
ihe Meter (YHP) —
Color
Pattern CG-921 | _
Generator _| (KENWOOD)
Sensitivity: more than 1 mV
F CS-6040 :
Oscilloscope (KENWOOD) i it Ae More |
Time-Marker | TG-501 | Time mark: 0.5 s to 0.1yus
Generator (Tektronix) | repetive waveform
eee ee _ input Impedance: 1000 MQ
Impedance: 50 2
Accuracy: within 3% |
3 watts type impedance:
Termination _
Termination -
— 20 dB attenuation (50 Q)
Table 1
Attenuator -
PREPARATION FOR ADJUSTMENT
Control Settings
The
control
settings
listed
below
must
be
used
for
each
adjustment
procedure.
Exceptions
to
these
settings
will
be
noted
as
they
occur.
After
completing
a
adjustment,
return
the
controls
to
the
following
settings.
NAME OF KNOBS POSITION
INTEN 12 o'clock
FOCUS
Optimum
position
CH1,
CH2,
CH3
#
POSITION
|Mechanical
center
<>
POSITION
‘Mechanical
center
x10 MAG OFF
VARIABLE, H.VARIABLE CAL
(VOLTS/DIV, SWEEP TIME/DIV)
AC-GND-DC
(CH1
and
CH2)
DC
(GND
at
no
signal)
VERTICAL MODE CH1
HORIZONTAL MODE A
TRIGGERING COUPLING AC
TRIGGERING SOURCE VERT MODE
TRIGGERING MODE AUTO
TRIGGERING
LEVEL
Mechanical
center
VOLTS/DIV (CH1 and CH2) 5 V/DIV
A/B SWEEP TIME/DIV 0.5 s/50 ms
TRACE SEP Fully CCW
HOLD OFF Fully CCW
SLOPE M+
Table 2
17

18
ADJUSTMENT
Vagusment [pe —Ss=~—~—~S ode SCSCS~*
X80-1370 V.MODE: CH1, CH2. AC-DC: GND (both CH),
X74-1580 VOLTS: 10 mV (both CH), H.DISP: X-Y, R/O: OFF
1) Move the spot to the CRT center by operating the POS! controls.
2) Attach the multimeter probes across P5-1 and GND of X80-1370 and adjust
VR4 to the voltage 33.5 V.
3) Attach the multimeter probes across P7-1 and GND of X74-1580 and adjust
VR303 so that the voltage is 70 V.
4) Attach the probe to P7-4 and ensure that the voltage reading is approx. 70
V.
Operating voltage
X74-1580 V.MODE: CH1, CH2, AC-DC: GND (both CH),
VOLTS: 10 mV (both CH), H.DISP: X-Y
1) Move the spot to the CRT center by operating the POSi controls.
2) Adjust the spot to the best point with FOCUS on the panel and ASTIG
(VR305).
3) Set FOCUS on the panel to the 12:00 position and adjust VR201 to move the
spot to the best point.
Focus Center and
ASTIG
V.MODE: CH1, CH2. AC-DC: GND (both CH),
VOLTS: 10 mV (both CH), H.DISP: X-Y
1) Set INTEN to the 10:00 position.
2) At the 10:00 position, adjust so that the spot disappears.
Intensity VR202 X74-1580
V.MODE: CH1, CH2. AC-DC: GND (both CH),
POSI VR2 (POSI) VOLTS: 10 mV (both CH), H.DISP: A,
* In case the R/O unit R/O: ON, A.SWEEP: 1 ms
is not used, ignore 1) Set the R/O display to 6.00 by operating the cursor POSI controls.
this item. 2) Adjust VR3 and VR2 so that the interval between cursors is 6 div.
3) Maximize the cursor interval by operating the cursor POSI controls.
4) Adjust VR2 to make it uniform.
Cursor Y-Gain and VR3 (Gain) X80-1370
V.MODE: CH1, CH2. AC-DC: GND (both CH),
VOLTS: 10 mV (both CH), H.DISP: A,
R/O: ON (1/AT), A.SWEEP: 1 ms
1) Set the R/O display to 8.00 by operating the cursor POSI controls.
2) Adjust VR304 and V306 so that the cursor interval is 8 div..
3) Maximize the cursor interval by operating the cursor POS! controls.
4) Adjust VR306 to make it uniform.
In case the R/O unit is not used, VR304 is to be adjusted in the SWEEP TIME
1 ms adjustment.
VR304 (Gain)
VR306 (POS!)
Cursor X-Gain and X74-1580
POS!
* In case the R/O unit
is not used, adjust
only VR304, The VR
can be used to
adjustthe length of
the SWEEP TIME 1
Ms trace.
CH1 Gain
VR1 (10 mV)
VR102(1mV)
V.MODE: CH1, AC-DC:DC, H.DISP: A,
VOLTS: 10 mV, VARI: CAL.
1) Input a 50 mV square wave signal.
2) Adjust so that the amplitude is 5 div. (10 mV range)
3) Switch VOLTS to 1 mV and input a 5 mV square wave signal.
4) Adjust so that the amplitude is 5 div. (1 mV range)
X80-1370
X73-2070
CH2 Gain VR207 (10 mV)
VR202(1mV)
V.MODE: CH2, AC-DC: DC, H DISP: A,
VOLTS: 10 mV, VARI: CAL.
1) Input a 50 mV square wave signal.
2) Adjust so that the amplitude is 5 div. (10 mV range)
3) Switch VOLTS to 1 mV and input a 5 mV square wave signal.
4) Adjust so that the amplitude is 5 div. (1 mV range)
X73-2070

ADJUSTMENT
Item
Adjustment
Procedure
X-Gain
VR308
X74-1580
H.DISP:
X-Y,
AC-DC:
DC
*
In
case
the
R/O
unit
VOLTS:
10
mV,
VARI:
CAL.
is
not
used,
do
not
1)
Input
a
50
mV
square
wave
signal
to
CH2.
adjustthis
item
now
2)
Adjust
so
that
the
amplitude
is
5
div.
(10
mV
range)
but
adjust
after
*
Make
the
adjustment
to
5
div.,
at
the
CRT
center.
H.POSI.
CH3 Gain X73-2070 V.MODE: CH3, H.DISP: A
1) Input a 0.5 V square wave signal.
2) Adjust so that the amplitude is 5 div. (0.1 V range)
CH1 Step ATT : X73-2070 V.MODE: CH1, AC-DC: GND (both CH)
Balance VOLTS: 5 mV (both CH) H.DISP: A
1)
Adjust
so
that
the
trance
does
not
move
when
VOLTS
is
switched
from
5
mV
to
2
mV.
*
Adjust
after
switching
to
2
mV
with
reference
to
the
5
mV
position.
CH1 VARIABLE X73-2070 V.MODE: CH1, AC-DC: GND (both CH)
Balance
VOLTS:
5
mV
(both
CH)
H.DISP:
A
Adjust
by
setting
VARIABLE
to
the
MIN
(fully
counterclockwise)
position
with
reference to the MAX (CAL) position.
*
Ensure
that
the
trace
does
not
move
when
VARIABLE
is
switched
between
MIN
©
MAX.
CH2 Step ATT X73-2070 V.MODE: CH2, AC-DC: GND,
Balance VOLTS: 5 mV, H.DISP: A.
1) Adjust so that the trace does not move when VOLTS is switched from 5 mV
to 2 mV.
* Adjust after switching to 2 mV with reference to the 5 mV position.
CH2 VARIABLE X73-2070 V.MODE: CH2, AC-DC: GND,
Balance VOLTS: 5 mV, H.DISP: A.
1) Adjust by setting VARIABLE to the MIN (fully counterclockwise) position
with reference to the MAX (CAL) position.
* Ensure thatthe trace does not move when VARIABLE is switched between
MIN & MAX.
CH2 INV Balance X73-2070 V.MODE: CH2, AC-DC: GND,
VOLTS: 5 mV, H.DISP: A.
1) Adjust so that the trace does not move when CH2 INV is switched ON-OFF.
2) Check CH2 STEP ATT BAL and VARI BAL and, if any is deviated, re-adjust
following the adjustment procedure.
ADD POSI X73-2070 V.MODE: CH1, ADD, AC-DC: GND,
VOLTS: 5 mV_ H.DISP: A
1) Superimpose the two displayed traces by operating CH2 POSI.
2) Switch V.MODE CH2 ON. (Afterthis, CH1,CH2 and ADD of V.MODE are ON.)
3) Superimpose the two displayed traces b operating CH1 POSI.
4) Adjust the trace to the center of scale.
(The CRT seems to display a single trace but it actually consists of a
superimposition of 3 traces.)
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9

ADJUSTMENT
V.POSI Center VR106 (CH1) | X73-2070 V.MODE: CH1, CH2, CH3,
VR206 (CH2) VOLTS: 5 mV, H.DISP: A,
VR302 (CH3) AC-DC: GND.
1) Set POS! of each CH to the 12:00 position.
2) Adjust the trace of each CH to the scale center.
CH1 Waveform TC102 (0.1 V) | X73-2070 V.MODE: CH1, AC-DC: DC, VARI: CAL,
Shaping TC104 (1 V) VOLTS: 10 mV {ideal waveform), H.DISP: A.
1) Input a 1 kHz square wave to the CH1 input.
2) Adjust so that the waveforms at 0.1 V and 1 V are flat.
CH2 Waveform TC202 (0.1 V) | X73-2070 V.MODE: CH2, AC-DC:DC, VARI: CAL,
Shaping TC204 (1 V) VOLTS: 10 mV (ideal waveform), H.DISP: A.
1) Input a 1 kHz square wave to the CH2 input.
2) Adjust so that the waveforms at 0.1 V and 1 V are flat.
CH3 Waveform X73-2070 V.MODE: CH3, H.DISP: A.
Shaping 1) Input a 1 kHz square wave to the CH1 input and adjust so that the waveform
is flat.
Input Capacity TC101 (0.1 V) | X73-2070 V.MODE: CH1, AC-DC:DC, VARI: CAL,
TC103 (1 V) VOLTS: 10 mV (reference), H.DISP: A.
1) Connect a capacity meter to the CH1 input.
2) Measure the capacity of the 10 mV range. (No more than 25 p)
3) At 0.1 V and 1 V, adjust to obtain the same values as 10 mV.
Input Capacity TC201 (0.1V) | X73-2070 V.MODE: CH2 AC-DC: DC, VARI: CAL,
TC203 (1 V) VOLTS: 10 mV (reference), H.DISP: A.
1) Connect a capacity meter to the CH2 input.
2) Measure the capacity of the 10 mV range. (No more than 25 p)
3) At 0.1 V and 1 V, adjust to obtain the same values as 10 mV.
FIX Level X74-1580 V.MODE: CH1, AC-DC:DC, VOLTS: 0.1 V,
TRIG MODE: FIX, SWEEP T: 0.2 ms. ;
1) Input 1 kHz sine wave to CH1 and set it so that it extends by 3 div., above
and below the scale center line.
2) Adjust so that the waveform starts from the scale center line when SLOPE
is switched between +/-.
3) Set the amplitude to 1 div., switch SLOPE to + and -, and ensure that
triggering is applied. (If it is not applied, re-adjust now.)
Align the start with —.
the center.
TRIG Level X74-1580 V.MODE: CH1, AC-DC:DC, VOLTS: 0.1 V,
TRIG MODE: AUTO, SWEEPT: 0.2 ms.
1) Input 1 kHz sine wave to CH1 and set it so that it extends by 3 div., above
and below the scale center line.
2) Set TRIG LEVEI to the 12:00 position and adjust so that the waveform starts
from the scale center line.
Align the start with —.
the center.