Promax OD-514B, OD-545B, OD-515B Instruction Manual

OD-514B, OD-515B

OD-545B

OSCILOSCOPIOS DE DOBLE CANAL

DUAL-CHANNEL OSCILLOSCOPES

OSCILLOSCOPES DE DOUBLE CANAL

0 MI0852

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

TABLE OF CONTENTS

1. GENERAL ...........................................................................................................................1

ESCRIPTION

1.1 D

PECIFICATIONS

1.2 S

...................................................................................................................1

...............................................................................................................2

2. SAFETY RULES .................................................................................................................5

ENERAL

2.1 G

PECIFIC PRECAUTIONS

2.2 S

ESCRIPTIVE EXAMPLES OF OVER-VOLTAGE CATEGORIES

2.3 D

..........................................................................................................................5

....................................................................................................7

...............................................7

3. INSTALLATION ..................................................................................................................9

OWER SUPPLY

3.1 P

ANDLE POSITION

3.2 H

................................................................................................................9

...........................................................................................................10

4. INSTRUCTIONS............................................................................................................... 11

ESCRIPTION OF CONTROLS AND ELEMENTS

4.1 D

4.2 S

TART UP

.......................................................................................................................18

...................................................................11

4.2.1 Preliminary Operations.........................................................................................18

4.2.2 Trace Rotation Adjustment ..................................................................................19

4.2.3 Probe Compensation ...........................................................................................19

4.3 OPERATION METHOD...............................................................................................20

4.3.1 Single-Channel Operation....................................................................................20

4.3.2 Dual-Channel Operation ......................................................................................21

4.3.3 ADD and SUBTRACTION Measurement............................................................22

4.3.4 X-Y Operation and EXT HOR Operation.............................................................23

4.3.5 Triggering options.................................................................................................24

4.3.6 Single-sweep Operation.......................................................................................29

4.3.7 Sweep Magnification............................................................................................29

4.3.8 Waveform Magnification with Delayed Sweep....................................................30

4.3.9 Readout Functions...............................................................................................32

5. MAINTENANCE ................................................................................................................35

NSTRUCTIONS FOR RETURNING BY MAIL

5.1 I

AINS FUSE REPLACEMENT

5.2 M

USES THAT CANNOT BE REPLACED BY THE USER

5.3 F

LEANING RECOMMENDATIONS

5.4 C

............................................................................................35

......................................................................................36

..........................................................................35

..........................................................36

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

DUAL-CHANNEL OSCILLOSCOPES

OD-514B, OD-515B & OD-545B

1. GENERAL

1.1 Description

OD-514B, OD-515B & OD-545B

The
operational reliability. This family of oscilloscopes are dual-channel oscilloscopes with
maximum sensitivity of 1 mV/DIV and maximum sweep time of 10 ns/DIV.

The most important di fferences bet ween each model can be fo und in t he followi ng
table:

OD-514B OD-515B OD-545B

Bandwidth 40 MHz 60 MHz 60 MHz
Delay sweep system NO NO SI

Cursor readout NO NO

are sturdy, easy to operate and exhibit hig h

V, 'V%, 'VdB, 'T, 1/'T,

'

DUTY, PHASE

Additionally, the oscilloscopes offer several other features:

High intensity CRT with high acceleration voltage

:
The CRT is a high beam transmission and high intensity type with a high acceleration
voltage of 2 kV for

OD-514B

and 12 kV for

OD-515B

and

OD-545B

. It displays clear

readable traces even at high sweep speeds.

A trigger level lock function

This circuit elimin ates the procedur es of the troubles ome trigg ering adj ustment not only for
displaying signals but a lso for tha t of vide o signals an d la rge du t y-cycle signa ls.

TV sync triggering:

The oscilloscope has a sync separat o r circuit f or TV-V and TV-H signa ls tr iggerin g.

X-Y operation mode

In this mode horizont al deflection (X-a xis) is v ia CH1 signal and vertic al deflecti on (Y-axis)
is via CH2 signal.

CH1 Output:

CH1 output located on rear panel can be applied to frequency counter or other instruments.

Z-Axis Input:

Beam intensity modulation capability permits time or frequency markers to be added. Trace
blank with positive signal, TTL compatible.

November 2000

Page 1

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

1.2 Specifications

SPECIFICATION / MODEL OD-514B OD-515B O D - 5 45B

VERTICAL

AXIS

Sensitivity
Accuracy
Vernier vertical sensitivity To 1/2.5 or less of panel-indicated value.

Frequency bandwidth

Rise time
Input impedance 1 M: ±2% // Approx. 25 pF

Square wave characteristics

Other distortions and other ranges: 5% added to the above value. (10ºC to 35 ºC)

DC balance shift
Linearity

CH1: CH1 single channel.
CH2: CH2 single channel.
DUAL: CH1 & CH2 channels. CHOP/ALT are auto-set by TIME/DIV switch.

Vertical modes

ADD: CH1 + CH2 algebraic addition.
Chopping repetition frequency Approx. 250 kHz
Input coupling AC, DC, GND
Maximum input voltage 400 V (DC + AC peak), AC: frequency 1 kHz or lower.

Common mode rejection ratio
Isolation between channels

(At 5 mV/DIV range)
CH1 signal output

CH2 INV BAL.

5 mV ∼ 5V/DIV: ≤ 3%, 1 mV ∼ 2 mV/DIV: ≤ 5% (10ºC to 35ºC)

5mV~2V/DIV:

DC~40MHz (-4 dB)

5V/Div:DC~40MHz (-5dB)

1mV~2mV/DIV:

DC~10MHz (-3dB)

(With reference to 100kHz, 8 DIV. Frequency response with –3 dB.)
5 mV ∼ 5 V/DIV: ≈ 8.75 ns
1 mV ∼ 2 mV/DIV: ≈ 35 ns

< ±0.1 DIV of amplitude change when waveform of 2 DIV at graticule centre is

(CHOP:0.5 s ∼ 5 ms/DIV, ALT: 2 ms ∼ 0.1 Ps/DIV)

When CHOP switch is pushed in, the two traces are displayed in the

CHOP mode at all range.

>

1000:1 at 50 kHz

>30:1 at 35 MHz

Approx. 100 mV/DIV without termination, 50 mV/DIV with 50 : termination.

Bandwidth (-3 dB): OD-514B: 20 MHz, OD-515B & OD-545B: 40 MHz

Balanced point variation: ≤ 1 DIV (Reference at centre graticule.)

1 mV ∼ 5V/DIV, 12 steps in 1-2-5 sequence

(5 DIV at the centre of display)

5 mV ∼ 5 V/DIV: DC ∼ 60 MHz,
1 mV ∼ 2 mV/DIV: DC ∼ 15 MHz

AC coupling: Low limit frequency 10Hz.

5 mV ∼ 5 V/DIV:≈ 5.8 ns,

1 mV ∼ 2 mV/DIV: ≈ 23 ns

Overshoot: ≤ 7% (At 10 mV/DIV range)

(5 DIV at the centre of display)

5 mV ∼ 5 V/DIV: ±0.5 DI V, 1 mV ∼ 2 mV/DIV: ±2.0 DI V

moved vertically.

50:1 or better at 50 kHz sinusoidal wave.

(When sensitivities of CH1 and CH2 are set equally)

> 1000:1 at 50 kHz

> 30:1 at 60 MHz

TRIGGERING

Page 2

Dynamic range

Signal delay

Triggering source

Coupling

Polarity

> 8 DIV at 20 MHz
> 4 DIV at 40 MHz

--- --- Leading edge can be

CH1, CH2, LINE, EXT (CH1 and CH2 can be selected only when the vertical

mode is DUAL or ADD). In ALT mode, if the TRIG. ALT switch is pushed in, it can

be use for alternate triggering of two different source. )

AC, HF-REJ, TV, DC

(TV-V/TV-H can be auto-set by TIME/DIV range. TV-V: 0.5 s-0.1 ms/DIV;

TV-H: 50 Ps ∼ 0.1 Ps/DIV)

/

+

−

> 8 DIV at 50 MHz
> 5 DIV at 60 MHz

monitored.

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

SPECIFICATION / MODEL OD-514B OD - 5 15B OD-5 45B

DC ∼ 5 MHz: 0.5 DIV

Sensitivity

(EXT: 0.1 V)

5 ∼ 20 MHz: 1.5 DIV

(EXT: 0.2 V)

20 ∼ 40 MHz: 2 DIV

DC ∼ 10 MHz: 0.5 DIV (EXT: 0.1 V)

10 ∼ 50 MHz: 1.5 DIV (EXT: 0.2 V)
50 ∼ 60 MHz: 2.0 DIV (EXT: 0.3 V)

(EXT: 0.3 V)

TV (video signal): 2.0 DIV (EXT: 0.2 V)
AC coupling: Attenuate signal components < 10 Hz.
HF-REJ: Attenuate signal components > 50 kHz.

AUTO: Sweeps run in the free mode when no triggering input signal is applied.

(Applicable for repetitive signals of frequency 50 Hz or over.)

NORM: When no triggering signal is applied, the trac e is in the REA DY stat e and

Triggering modes

SINGLE: One-shot sweep with triggering signal. Can be reset to the READY state by

TRIGGERING

not displayed.

means of the RESET switch.

The READY lamp (LED) turns on when in the

READY state or in the sweep operation.

HORIZONTAL

AXIS

X-Y MODE

LEVEL LOCK and ALT

Satisfies the value of the

above trigger sensitivity plus

1DIV (EXT: 0.1 V) for signal of

duty cycle 20:80.

Repetition frequency:

Satisfies the value of the above trigger sensitivity

plus 0.5 DIV (EXT: 0.05 V) for signal of duty

cycle 20:80.

Repetition frequency: 50 Hz ∼ 40 MHz

50 Hz ∼ 40 MHz

EXT triggering signal input
Input impedance
Max. input voltage

100 V (DC + AC peak), AC: Frequency not higher than 1 kHz

1 M: ±2% // approx. 35 pF

The triggering signal

B triggering signal.

of main sweep is

used as the B

triggering signal.
Horizontal axis display A A, A INT, B, B TRIG'D
A sweep (main sweep) time 0.1 Ps ∼ 0.5 s/DIV, 21 steps in 1-2-5 sequence
Sweep time accuracy ± 3%, (10 ºC to 35 ºC)
Vernier sweep time control

1/2.5 of panel-indicated value

≤

Hold off time Continuous variable  twice sweep length (time) at 0.1 µs ~ 1 ms/DIV ranges.
B sweep delay system

Continuous delay and

triggered delay
B sweep time
(delay sweep)
Sweep time accuracy
Delay time
Delay jitter

--- ---

0.1 Ps ∼ 0.5 ms/DIV,
12 steps

3%, (10 to 35 ºC)

±

1 Ps ∼ 5 ms

1/10000

≤

Sweep magnification 10 times (maximum sweep time 10 ns/DIV)
x10 MAG sweep time
accuracy
Linearity
Position shift caused by
x10MAG

0.1 Ps ∼ 50 ms/DIV ±5%, 10 ns ∼ 50 ns/DIV ±8% (1 0 º to 35ºC)
NORM: ±3%, x10MAG: ±5% (±8% for 10 ns ∼ 50 ns/DIV)

Within 2 div. at CRT screen centre

Sensitivity Same as vertical axis: (X-axis: CH1 input signal; Y-axis: CH2 input signal.)
Accuracy NORM: ± 4%, x10MAG: ± 6% (10º to 35 ºC)
Frequency bandwidth
X-Y phase difference

DC ∼ 1 MHz (-3dB) DC ∼ 2 MHz (-3dB)

3º at DC ∼ 50 kHz

≤

3º at DC ∼100 kHz

≤

November 2000

Page 3

SPECIFICATION / MODEL OD-514B OD-515B O D - 5 45B

EXT HOR

MODE

Z AXIS

CALIBRATION

VOLTAGE

CRT

CURSOR

READOUT

(OD-545B

only)

POWER

SUPPLY

OPERATING

ENVIRONMENT

MECHANICAL

FEATURES

ACCESSORIES

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

Sensitivity
Frequency bandwidth

Phase difference between
vertical axis

Sensitivity 3 Vp-p (Trace becomes brighter with negative input.)
Frequency bandwidth
Input impedance

Maximum input voltage
Waveform Positive-going square wave

Frequency 1 kHz ±5%
Duty ratio 48:52
Output voltage 2 Vp-p ±2%
Output impedance

Type 6-inch rectangular type, internal graticule.
Phosphor P 31

Acceleration voltage
Effective screen size 8 x 10 DIV (1 DIV = 10 mm (0.39 in))

Graticule Internal; continuous adjustable illumination (OD-515B & OD-545B only)
Cursor measurement

functions
Cursor display format
Cursor resolution 1/25 DIV
Effective cursor range from

centre graticule
Panel setting display

Mains voltage
Consumption 60 W

Indoor use
Altitude up to 2000 m

Temperature range
Relative humidity R. H. 85% (maximum value) non condensing

Storage temperature
& humidity

Dimensions 310 W x 150 H x 455 D (mm)
Weight Approx. 8.2 Kg (18 lbs)

Power cord CA-006

Approx. 0.1 V/DIV (Trace swept by an external horizontal signal applied to the

EXT TRIG IN terminal. Vertical axis modes are CH1, CH2, DUAL and ADD

DC ∼ 1 MHz (-3 dB) DC ∼ 2 MHz (-3 dB)

50 V (DC + AC peak, AC frequency≤ 1 kHz )

Approx. 2 kV Approx. 12 kV

V/DIV, V-MODE, INV, ALT/CHOP, UNCAL, ADD (SUB), x10 MAG,

PROBE (x1 / x10), X- Y, A T/D, TV-V/H, B T/D

100 V, (90 to 110 V), 120 V (108 to 132 V), 220 V (198 to 242 V),

230 V (207 to 250 V) AC selectable, 50 or 60 Hz

modes in the CHOP mode.)

3º at DC ∼ 50 kHz

≤

DC ∼ 5 MHz

5 k

:±

Approx. 2 k

V%,'VdB, 'T, 1/'T, DUTY, PHASE

'V,'

(DELTA),

¦



Vertical: ±3 DIV

Horizontal: ±4 DIV

To satisfy specifications: 5 º to 35 ºC

Maximum operating ranges: 0º to 40 ºC

-10 º to 70 ºC, R.H. 70% (maximum)



:

(REF)

3º at DC ∼ 100kHz

≤

Page 4

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

2. SAFETY RULES

2.1 General

* Use this equipment connected

measurement connected to ground potential

* This is a

corresponding

Class I

equipment, for safety reasons plug it to a supply line with the

ground terminal

* This equipment can be used in

Degree 1

environments.

only to systems with their negative of

.

.

Overvoltage Category II

installations and

* When using some of the following ac cessori es use onl y the

safety.

Mains (Power) cord.
* Observe all
* Remember that voltages higher than
* Use this instrume nt un der the

The user is only authorised to

*

Mains fuse replacement, that should fit indicated

specified ratings

both of supply and mea su r emen t.

60 V DC

30 V AC rms

or

specified environmental conditions

carry out the following maintenance operations:

type

and

value

On the Maintenance section proper instructions are given.

specified

ones to ensure

are dangerous.

.

.

Pollution

Any other change on the equipment should be carried out by qualified personnel.
*The
*
* Follow the

negative of measurement

is at ground potential.

Do not obstruct the ventilation system

cleaning conditions

described in the Maintenance paragraph.

of the instrument.

November 2000

Page 5

* Symbols related with safety:

DIRECT CURRENT

ALTERNATING CURRENT

DIRECT AN D AL TERNATING

GROUND TE RM I N AL

PROTECTIVE CONDUCTOR

FRAME TERMINAL

EQUIPOTENTIALITY

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

ON (Supply)

OFF (Supply)

DOUBLE INSULATION
(Class II protection)

CAUTION
(Risk of electric shock

CAUTION REFER TO MANUAL

FUSE

)

Page 6

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

2.2 Specific precautions

1. Do not use the equipment immediately after moving it to a room with very different

temperature. Wait for a while until the equipment reaches room temperature.

2. Do not apply voltages that exceed the limits of probes or input connectors.

2.3 Descriptive Examples of Over-Voltage Categories

Cat I

Cat II

Cat III

Cat IV

Low voltage installations isolated from the mains
Portable domestic installations
Fixed domestic installations
Industrial installations

November 2000

Page 7

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

Page 8

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

3. INSTALLATION

3.1 Power Supply

OD-514B, OD-515B

The

and

OD-545B

oscilloscopes can be powered with mains
voltages of 100, 120, 220 or 230 V AC 50-60 Hz. Mains voltage (line voltage) can be
selected from the mains socket.

1.-

Remove fuse holder lid

2.-

Fit the suitable fuse for t he se le cted main s vo ltage .

3.-

Replace the fuse holder lid, aligning

November 2000

Figure 1.-

Mains voltage change.

[A]

mark with the desire d ma in s vo ltag e mar k

[B]

CAUTION:

FACTORY SETS INSTRUMENT MA INS VOLTAGE TO 230 V

BEFORE PLUG THE INSTRUMENT TO THE MAINS, SET THE VOLTAGE
SELECTOR PROPERLY AND CH ECK THAT FUSE VALUE CORRES PONDS TO
THE MAINS VOLTAGE VALUE.

Page 9

3.2 Handle position

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

OD-514B, OD-515B & OD-545B

oscilloscopes have a movable handle for

transport and f o r posit io ning the oscillosco pe to ob tain t h e be st angle w ith the disp la y.

To change ha ndle position, take the h andle supports that are in c ontact with the

oscilloscope chassis and de tach slig htly f rom th e chassis so you can change it s posit ion .

Page 10

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

4. INSTRUCTIONS

4.1 Description of controls and elements

Figure 2.- OD-514B

frontal panel.

November 2000

Figure 3.- OD-515B

frontal panel.

Page 11

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

Figure 4.- OD-545B

frontal panel.

Oscilloscope frontal panel is zone-divided according to the controls functions:

VERTICAL, TRIGGER, HORIZONTAL

, etc. The following paragraphs describe the controls

and elements of th e fr on tal pa ne l gr oupe d a cco rding to t hat fu nct io nal zones.

[9]
[8]
[1]

I/O

. Main power switch of th e in st rum en t.

POWER

CAL

. It lights when the I/O switch of th e oscillo sco pe is ON.

. The terminal provi des a calibrated amplitu de square wave of 2 V p-p at 1

kHz for probe adjustment and vertical amplifier calibration.

CRT

[2].

[3]

[4]
[5]

INTEN.

Control the brightness of the spot or trace. The brightness increases

when turning the control clockwise.

B INTEN. (OD-545B

only) Control the brightness of the spot or trace when in

sweep delay (B) mode.

FOCUS

TRACE ROTATION

. Focus the trace to the sharpest image.

. Semi-fix potentiometer for aligning the horizontal trace in

parallel with graticule lines.

Page 12

[6]
[7]

ILLUM.

(Except

READOUT INTEN. (OD-545B

OD-514B

). Graticule illuminat ion adju st m ent .

only) Semi-fixed potentiometer for adjusting

intensity of the readout and cursors.

[42] CRT screen with internal graticule.

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

VERTICAL AXIS (VERTICAL)

[12]

CH1 (X

). The input termin al of vertical ch annel CH1. I n X-Y operati on mode i s

X-axis.
[16]
[11] [15]

CH2 (Y

). Input terminal of vertical channel CH2. In operation mode X-Y is Y-axis.

AC/GND/DC

. Select connection mode between input terminal and vertical

amplifier for channel CH1 and CH2 respectively.

AC

GND

Blocks DC component of th e inpu t sign a l.
Connect the vertical amplifier of the CH1-CH2 to ground, establishin g a
ground reference.

DC

Connect CH1-CH 2 amplifier to the input terminal, visualising AC & DC
component of the signal.

[10] [14]

VOLTS/DIV

. Selects the CH 1/C H2 v ertic al ax is s ens itiv ity fr om 5 mV/D IV to

5 V/DIV with 12 ranges totally.
[13] [17]

VARIABLE

. Fine adjustment of sensitivity of CH1 & CH2 vertical axis respectively

with a factor of ≥ 1/2.5 of the indicated value. The sensitivity is calibrated to

VARIABLE

control.

[40] [37]

specific value in the CAL position of



POSITION. Vertical positioning control of the CH1/CH2 trace on the CRT
display. Clockwise turning shifts trace up and anticlockwise turning shifts trace
down.

[39] MODE. Select operation mode of CH1 and CH2 amplifiers.

CH1 Operate the oscilloscope as a single-channel instrument by selecting

CH1 alone.

CH2 Operate the oscilloscope as a single-channel instrument by selecting

CH2 alone.

DUAL Operate the oscilloscope as a dual-channel instrument by selecting

CH1 and CH2 (see control [41] description).

ADD The oscilloscope displays the algebraic sum (CH1 + CH2) or

subtraction (C H1 - CH2) of the two signal s (the subtraction func tion
effects only when push in CH2 INV [36] button).

[41] CHOP. Operative in DUAL mode only.
Switch engaged CH1 & CH2 signal traces are chopped and displayed

[36] CH2 INV. Inverts CH2 signal polarity.
[20] Gr ound terminal.

TRIGGERING

[23] EXT TRIG (EXT HOR). Input terminal is use d in common for exter nal triggering

November 2000

simultaneous ly . Th at is , eac h hori z o nt al sweep of the electrons beam of th e C RT .
Normally used at slower sweep speeds.

signal and extern al horizontal signal. To use t his terminal, set SOURCE swit ch
[26] to the EX T posit i on.

Page 13

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

[26]

[24]

[25]

SOURCE
CH1 (X-Y)

. Selects the triggering source:

Selects CH1 signal as the triggering source when VERT MODE
switch [39] is set to DUAL or ADD. When in the X-Y mode, select
CH1 for the X-axis signal.

CH2

Selects CH2 signal as the triggering source when VERT MODE
switch [39] is set to DUAL or ADD.

LINE

Selects a pulse from the AC line. This allows the oscilloscope to be
stabilised for the pulses of the signal of the AC line even if those are
very small in relatio n to ot her sign al compon en t s.

EXT

Selects the signal applied through
source.

When in the X-Y, EXT HOR mode, the X-axi s operat es with

EXT

terminal [23] as triggering

the external sweep signal.

TRIG ALT

. When the VERT MODE switch [39] is set in the DUAL or ADD state,
and the SOURCE swit ch [ 23] i s sel ected at C H1 or CH 2, with the enga geme nt of
the TRIG.ALT switch, it will alternately select CH1 & CH2 for the internal
triggering source signal.

COUPLING.

Select COUPLING mode between triggering source signal and

trigger circuit; select connection of TV sync trigger circuit.

AC:
DC:
HF REJ:
TV:

AC coupling.
DC coupling
Removes signal components above 50 kHz (-3 dB).
The trigger circuit is connected to the TV sync separator circuit
and the triggered s weeps synchroni se with TV-V or T V-H signal
at a rate selected by the TIME/DIV switch [18]

[22]

[30]

[29]

[31]

TV-V: 0.5 s/DIV - 0.1 ms/DIV

TV-H: 50 µs/DIV - 0.1 µs/DIV

SLOPE

. Selects the trigge ring slope.

+

Triggering occ urs when the tr igg erin g si gnal c ross es the tri gg erin g lev el
in positive-going d irection .

-

Triggering occ urs when the tr igg erin g si gnal c ross es the tri gg erin g lev el
in negative-going direction.

LEVEL

. Selects the amplitude of the sig nal that mak es the triggering occur when
in TRIGGER NORM. That is, the start point of the waveform. When turning it
clockwise (+), the triggerin g level moves upwar d on the display wavef orm. When
turning it anticlockwise (-), the triggering level moves downward on the display
waveform.

LOCK

. Triggering level is automatically maintained at optimum value irrespective
of the signal ampl itu de (fr om v ery sm all to l arge am plitu des), r equi rin g no man ual
adjustment of triggering level.

HOLD OFF

. Used when the signal waveform is complex and stable triggering

cannot be attained with the LEVEL knob alone.

Page 14

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

[28]

MODE

. Select the desired trigger mode.

AUTO

When no triggering si gn al i s a p pl ied or when trig ger i n g si g nal fr e qu ency
is less than 50 Hz, sweep runs in the free run mode.

NORM

When no trigg ering si gnal is a pplied, sweep is in a rea dy st ate and the
trace is blanked out. Used primarily for observation of signal ≤ 50 Hz.

SINGLE

Use for single sweep. ( E xcept

OD-514B

Push to RESET: Operation (one-short triggering operation), and in
common as the reset switch. When these three buttons are disengaged,
the circuit is in the single tr i gg er m od e. Th e ci r cui t i s r es et as t hi s b utt o n
is pressed. W hen the circuit is reset, t he READY lamp t urns on. The
lamp goes out when the single sweep operation is over.

TIME BASE OR HORIZONTAL CHANNEL (HORIZONTAL)

[18]

[19]

TIME/DIV
OD-545B

. Select the s w eep time of the A s w eep. (A and B s w ee p i n common for

only, B TIME/DIV < A TIME/DIV)

SWP. UNCAL.

Activates

SWP VAR

control. TIME/DIV [18] c alibra tions are ex act

only when this key is not pushed in.

[21]

SWP. VAR.

Vernier control of sweep time. When
pushed in, the s weep time c an be made slower by a factor ≥ 2.5 of the in dicated
value.

)

SWP.UNCAL

[19] button is



[34]

POSITION. Horizontal posi tioning control of the traces on the CRT displ ay.
When turning this control clockwise the trace moves to the right on the CRT.
When turning this control anticlockwise the trace moves to the left on the CRT.

[33] x 10 MAG. Expands horizontal deflection 10 times, multiplying per 10 the

horizontal sensitivity in X-Y operation mode and the effective sweep speed.

[38] HORIZ. DISPLAY MODE (OD-545B only)

Select swe ep mode s as fo llows:

A: Main sweep (A sweep) mode for general waveform observation.
A INT: This sweep mode is used when selecting the section to be

magnified of A sweep, in preparation for delayed sweep. The B
sweep sectio n (delayed sweep) cor responding to the A sw eep is
displayed with a high intensity beam.

B: Display the delayed swee p (B sw eep) a lone.
B TRIG‘D: Select between continuous delay and triggered delay.

Disengaged: For continuous delay. The B sweep starts

immediately after the sweep delay time set by A

TIME/DIV and B TIME/DIV switch and DELAY
TIME knob has elapsed.

Engaged: For triggered delay. The B sweep starts when the

triggering pulse is applied after the sweep delay
time set by A TIME/DIV and B TIME/DIV switch and

DELAY TIME knob has elapsed.
(The triggering s ignal is used in common f or both A swee p and B
sweep).

November 2000

Page 15

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

READOUT FUNCTION

(Only available in

OD-545B

)

[38] CURSOR measurement

CURSOR ON/OFF

CURSOR FUNCTION.

∆

V Voltage difference measurement.

∆

V% Voltage difference measurement in percentage

. Press the button to turn on/off the cursor measurement.

Press the button to select the measurement functions.

(5 div =100% ref.)

∆

VdB Voltage gain measurement

(5 div = 0dB ref. , ∆VdB = 20 log∆div/5div)

∆

T Time difference measurement.

1/∆T Frequency measurement.
DUTY Duty cycle or time difference percent (∆T%)

measurement (5 div =100% ref.)

PHASE Phase measurement (5 div = 360° ref.)

TRACK -∇ -

selected curs or is indicat ed by either a



(REF): Press the button to sel ect the cursor(s ) to be m oved. Th e



∇

or  symbol. When both symbols are

displayed, the two curso rs can be sh ifted simu ltan eou sly.

[35] POSITION. Rotate the cursor POSITION control to position the selected

cursor(s). When HORZ. DISPLAY mode is set A INT or B state and CURSOR
ON/OFF is set OFF, the POSITION contr ol is used in common as the DELAY

TIME.
READOUT ON/OFF To turn on/off the readout status on the CRT, press the

CURSOR ON/OFF and CUR SOR FUNCTION buttons at
the same time.

PROBE x1 / x10 To indicate the voltage readout is scaled for x1 or x10

probe, press the TRACK -∇ -  (REF) button and rotate
the cursor POSITION at the same time.

Page 16

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

Rear Panel

[45]

Z AXIS INPUT

Figure 5.-

. Input termina l f or ex ternal CRT int ensi ty modul ati on s ignal . Tr ac e

Rear panel.

brightness is r ed uc e d wh en a p osi ti v e si g nal is ap pl i ed and it i s i ncr e ase d when a
negative signal is applied.

[46]

CH1 OUTPUT

input. Deliv ers the CH 1 signal wi th a voltage of approximately

100 mV per 1 DIV of graticule. When terminated with 50

:

, the signal is

attenuated to about one half. Suitable for frequency counting, etc.
[47] Power input connector. It allows to connect or disconnect the mains cord.
[48] Fuse and line voltage selector. It allows to change the operating voltage range.
[49] Studs for laying the oscilloscope on its back to operate it in the upward posture.

Also used to take up th e po we r cord .

November 2000

Page 17

4.2 Start Up

4.2.1 Preliminary Operations

Before switching on the in st rume nt, per form t he fo llo wing op erat ion s and che cks:

1. Set the controls as indicated:

CONTROL Nº STATE

I/O

INTEN

FOCUS

ILLUM

VERT MODE

CHOP

CH2 INV



POSITION



VOLTS/DIV

VARIABLE

AC/GND/DC

SOURCE

COUPLING

SLOPE

TRIG.ALT

LEVEL LOCK

HOLDOFF

TRIGGER MODE

HORIZ. DIS. MODE

TIME/DIV

SWP.UNCAL



POSITION



x10 MAG

X-Y

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

[9] OFF (disen ga ge d )
[2] Mid-position
[4] Mid-position

[6] Full anti-clockw ise posit ion
[39] CH1
[41] Released (ALT)
[36] Released

[40][37] Mid-position
[10][14] 0.5 V/DIV
[13][17] CAL (clockwise position)
[11][15] GND

[26] CH1
[25] AC
[22] +
[24] Released
[29] Pushed in
[31] MIN (ant i-clockw ise )
[28] AUTO
[38] A (OD-545B only)
[18] 0.5 ms/DIV
[30] Released
[34] Mid-position
[33] Released
[27] Released

Page 18

Table 1

Connect power c ord to power input co nnector [47], then connec t it to an AC li ne
outlet suitable for the instrument previously set AC line voltage, and then continues as
follows:

1. Press the I/O switch [9]. T he POWER led [8] will be on. In about 20 seconds, a
trace will appear on the CRT screen. If no trace appears in about 60 seconds,
check the switch and contro l set ting (pre viou s tab le).

2. Adjust the trace to an appropriate brightness and image with INTEN [2] and
FOCUS [4] control knob respectively.

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

WARNING
Ageing-resistan ce material has been used in t he CRT. In any case, th e
screen can be damag ed if a spot or a trace extr emely bright is s et on it
for a long time. So if an intense brightness is needed for a measurement
make sure to decrease intensity (INTEN) just after the measurement is
performed. You should get used to decrease brightness when your not
going to observe the oscilloscope for a while too.

3. Align the trace with the horizontal central line of the graticule by adjus ting the



CH1

4. Adjust the

POSITION





[40] control knob .

POSITION

[34] control knob to align the left end of the trac e with

the graticule lef t en d lin e.

4.2.2 Trace Rotation Adjustment

Preadjust the instrum ent until a trace jus t as i ndicated i n the prev ious par agrap h is

obtained.

CH1

[5]



POSITION



Align the trace with the horizon tal centr al line o f the gr aticule by adjustin g the

control knob [40].

Is the trace is not parallel to the central line, adjust the

TRACE ROTATION

potentiometer by means of a suitable screwdriver until the trace becomes parallel.

4.2.3 Probe Compensation

Probe compensation desadjustment is, frequently, a measurement errors source.
Attenuated probes include a compensation adjustment. Get used to check probe
compensation before performing the measurements to assure optimum conditions
measurements.

Set the instrument as indicated in section 4.2.1.

CH1

input termi nal [12] and connect the pr obe tip to

CAL 2 Vpp

the

Connect a prob e (x10) to the

terminal [1]. On the CRT screen should b e displayed a square wave form

with four divisions amplitude (4 x 0.5 V/DIV = 2 Vpp).

If the display ed waveform is distor ted, adjust the comp ensation trimmer on probe
for optimum square wave (minimum overshoot, rounding off and tilt). See figure 6.

November 2000

Figure 6.-

Probe Compen sat io n.

Page 19

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

to

Remove the pro b e fro m

CH2

position and repeat the process for

CAL 2 Vpp

terminal [1]. Set s wi tch

CH2

, each one with its own probe.

VERTICAL-MODE

[39]

Now the oscilloscope is read y to be used.

4.3 OPERATION METHOD

4.3.1 Single-Channel Operation

Single trace and base time operation and internal triggering is the most basic
operating mode of t he
only one signal to be observed, without the inconvenience of other traces on the CRT
screen. Due it is a two channel oscilloscope, any of these two channels can be selected.
CH1 is provided wi th and outp ut ter minal : us e t he
measure signal frequenc y using a frequ ency count er while obs erving wav eform. CH2 hav e
a switch that inverts polarity, although it adds flexibility, it has no use when operating in
single trace mode.

OD-514B, OD-515B

1. Set the following controls of the instrument as shown below. Observe the
selected triggering source (CH1 or CH2 SOURCE) corresponds to the selected
channel (CH1 or CH2 V MODE).

OD-514B, OD-515B & OD-545B

CH1

OD-545B

and

are set for single channel operation as follows:

. Select this m ode when there is

output terminal on the re ar pan el to

CONTROL Nº STATE

I/O

VERT MODE



POSITION



VOLTS/DIV

VARIABLE

AC/GND/DC

SOURCE

TRIGGER MODE

TIME/DIV

SWP. UNCAL



POSITION



X-Y

[9] ON (engage position)

[39] CH1 (CH2)
[40][37] Mid-position
[10][14] 0.5 V/DIV
[13][17] CAL clockwise position
[11][15] AC

[26] CH1 (CH2)

[28] AUTO

[18] 0.5 ms/DIV

[30] Released

[34] Mid-position

[27] Released

Table 2.-

2. Position trac e near the centre of th e screen by means of the



control [37] or

POSITION



control [40] (depending on the channel selected).



3. Connect the si gnal to be observe d to the appropri ate inp ut terminal

CH2

[16] and adj ust the appropri ate

VOLTS/DIV

selector [10] or [14] so that

signal waveform is completely displayed on the screen.

POSITION



CH1

[12] or

Page 20

WARNING
Do not apply signal higher than 400 V (DC + AC peak)

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

4. Set

TIME/DIV

[18] so that the appropriate number of signal cycles appears on
screen. For some measurements the appr opriate number of cycles is only two
or 3 cycles; for other measurements the appropriate number of cycles is 50-100
(displayed as a band). If necessary, adjust Trigger
stable display of the signal.

5. If the frequency of signal is so high that even in the 0.1
TIME/DIV [18] selector appears too many cycles on screen, push the x10 MAG
key [33]. This increases the effective sweep speed 10 times, so 0.2 Ps/DIV
position now c orrespo nds to 20 ns/ DIV, 0.5 Ps positio n corresp onds to
50 ns/DIV, etc.

6. If the frequency of the signal is very low or its zero (DC signal), so the AC
coupling atte nuates or distor ts the sign al, set AC/GND/DC [11] or [15] select or
to DC.

4.3.2 Dual-Channel Operation

Dual-Channel operation is the main operation mode of the OD-514B, OD-515B

and OD-545B.

Set VERT MODE [39] selector to the DUAL position so the channel 2 signal is

displayed too.

LEVEL

control [30] for a

P

s position of the

following exceptions:

according to:

will not be stable.

November 2000

Figure 7.-

The operation is identical to the one described in the section 4.3.1 with the

When in dual-ch annel o peratio n DUAL (or ADD), set Trigger SOURCE switch [26]

- If both channels are displaying signals of the same frequency, set th e Trigger
SOURCE swit ch [2 6] to th e chann e l wit h th e steepe st -s lo pe wa vef o rm.

- If the signals are different but they are harmonically related, trigger from the
channel carrying the lowest freque n cy.

- If the signals do not have the same frequency, engaging TRIG.ALT [24] both
signals will be synchronised.

Bear in mind to o that if th e channel us ed for tri ggering is disconnect ed, the ima ge

Page 21

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

Selection between

CHOP

mode and

TIME/DIV switch [18] sh own in Fi gure 8. T he

CHOP

mode and the

CHOP

push switch [41] is en gag ed, the two tr aces are dis pl ayed i n th e C H OP o per ati on at

2 ms/DIV and hig her

ALT

mode is automatically made by the

5 ms/DIV and lower

ranges are use d in the

ranges are used in the

ALT

mode. When the

all ranges. The CHOP operation has priority over the ALT operation.

Figure 8.-

4.3.3 ADD and SUBTRACTION Measurement

Add and subtraction operations are two types of dual-channel operation in which
the two signals are combined to display a unique trace. In ADD operation the resultant trace
displays the algebraic sum of the CH1 and CH2 signals. In subtraction operation the
resultant trace displays the algebraic difference of CH1 and CH2 signals.

Set the oscilloscope as shown below for ADD operation.

1. Set oscilloscope to dou ble - chan nel ope ra t ion a s show n in 4.3. 2.

2. Make sure that
and that
very different, set both

VOLTS/DIV

VARIABLE

[10] and [14] s elect ors ar e set to t he sa me p osition

[13] and [17] are set to

VOLTS/DIV

selectors to the position that completely

CAL

position. If signal levels are

displays on screen the signal with the highest amplitude.

3. Use the channel w ith th e highe st amp lit ude signa l f o r trig ge ring .

MODE

4. Set

selector [39] to

be the algebr aic sum of the C H1 and CH2 signals.

ADD

position. Thi s way the uniq ue r esul t a nt trace will

POSITION

[37] or [40] can

be used to positioning the resultant trace.

NOTE
If the input signa ls are in phase, th e amplitude of th e resultant tra ce
will be the arith m et i c su m o f t he individual tr ac es ( fo r ex. 4.2 d i v + 1.2
div = 5.4 div). If the phase differenc e of the input signals is 180º , the
resultant amplitud e is the arithm etic difference ( fore ex. 4.2 di v – 1.2
div = 3.0 div).

5. If the peak-peak amplitude of the resultant trace is very small, turn both

VOLTS/DIV

[10] and [14] selectors to increase the height of the displayed trace.

Make sure that both se lecto rs ar e set t o the same posit io n.

Page 22

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

To obtain the subtrac tion, proceed as bef ore but now push the

CH2 INV

[36] key.
The resultant trace will be the algebraic difference of the CH1 and CH1 signals. Now, if the
input signals are in phase, the resultant trace will be the arithmetic difference of the
individual traces (for ex. 4.2 div – 1.2 div = 3.0 div). If the input signals have a phase
difference of 180 º, the resultant trace amplitude will be the arithmetic sum of the individual
traces (for ex. 4.2 div + 1.2 div = 5.4 div).

4.3.4 X-Y Operation and EXT HOR Operation

Select X-Y Operation engaging

X-Y

switch [27].

The internal sweep circuit is disconnected and trace in the horizontal direction is

driven by the signal selected by the

−

When the

SOURCE

switch is set to

an X-Y scope with the

−

When the

EXT HOR

SOURCE

[23] (external sw eep ) mod e.

SOURCE

CH1

signal for the

switch is set to

switch [26].

CH1 X-Y

EXT

position, the oscilloscope operates as

X-axis

.

position, the oscilloscope operates in the

X-Y Operation

X-Y

The

operation is wi th
X-axis becomes DC to 1 MHz (-3 dB) (or DC to 2 MHz for
Horizontal
Y-axis, both verti cal
control if the

POSITION

POSITION

VERT MODE

control [34 ] is directl y used as the X- axis PO SITION c ontrol. Fo r the

switch [39] is properly set.

CH1

as X-axis and

CH2

as Y-axis. The ba ndwidth of th e

OD-515B

and

OD-545B

) and the

controls [37] and [40] can be us ed as vertical P OSITION

NOTE: When high frequency signals are displayed in the X-Y operation, pay
attention to the frequency bandwidths and phase differences between X and Y
axis.

EXT HOR Operation

The external si gnal applied thr ough the

The Y-axis i s with a ny chann els as sel ected by the V ERT

EXT HOR

terminal [23] driv es the X-axis.

MODE

switch [39]. When

mode is selected, both CH1 and CH2 signals are displayed in the CHOP mode.

Figure 9.- Figure 10.-

DUAL

November 2000

Page 23

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

4.3.5 Triggering options

Frequently, triggering selections is the most complicated operation to perform when
using an oscilloscope due to the many options available and the concrete requirements of
some signals.

1.- Tri g gering So urce Selection (SOURCE [2 6 ] )

The displaye d signal itsel f or a trigger si gnal which h as a time relati onship wit the
displayed sig nal is req uired t o be appli ed to th e trigger circuit to displ ay a stationar y sig nal
on the CRT screen. The

SOURCE

switch [26] is used for selecting such a triggering

source.

CH1

The internal triggering method which is used most commonly.

CH2

The signal applied to the vertical input terminal is branched off from the
preamplifier and is fed to the trigger circuit through the VERT

MODE

switch
[39]. Since the triggering signal is the measured signal itself, a stable
waveform can be readily displayed on the CRT screen. When in the DUAL or
ADD operation, the signal s elected by the

SOÜRCE

switch [26] i s used as

the triggering source signal.

LINE

EXT

The above trig ger ing source si g nal s el ec ti o n functions are s h ow n collectiv ely i n the

following table.

SOURCE/ VERT.MODE CH1 CH2 DUAL ADD

The AC power line frequency signal is used as the triggering signal. This
method is effective wh en t he measured si gn al has a r el ati o nship with the AC
line frequency, es pecially for measurem ents of low level AC noise of audio
equipment, thyristor circuits, etc.

The sweep is trig gered wi th an exter nal sig nal appli ed to th e external trigger
input terminal (

EXT [23]

). An external signal which has a periodic relationship
with respect to the measured signal is used. Since the measured signal is not
used as the triggering signal, the waveforms can be displayed more
independent than the measured signal.

CH1
CH2
ALT

LINE

EXT

Triggered by CH1 signal
Triggered by CH2 signal
Alternately triggered by CH1 & CH2
Triggered by LINE signal
Triggered by EXT TRIG input signal

Page 24

Table 3.-

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

2.- COUPLING control [25] functions

This switch is used for sel ecting the co upling of the tr iggering si gnal to the trigger

circuit in accordance with the characteristics of the measured signal.

AC

HF REJ

TV

This coupling is for AC triggering which is used most commonly. As the
triggering signal is applied to the trigger circuit throug h an AC coupling
circuit, stable triggering can be attained without being affected by the DC
component of the input signal. The low-range cut off frequency is 10 Hz
(-3 dB). When the ALT trigger mode is used and the sweep speed is

jitter

slow,

may be produced. In such a case, use the DC mode.

The triggerin g signal is fed to the trigger c ircuit through an AC co upling
circuit and a low pass filter (approximately 50 kHz, -3 dB). The higher
components of the trigger signal are rejected and only the lower
components are applied to the trigger circuit.

This coupling is for TV triggering, for observation of TV video signals. The
triggering signal is AC-coupled and fed through the triggering circuit (level
circuit) to the TV sync separator circuit. The separator circuit picks off the
sync signal, w hich is used to trigger t he sweep. Thus, the video signal
can be displayed st ably. Bei ng linke d to the TI ME/DIV s witch, the sweep
speed is switched for TV-V and TV-H as follows:

TV-V

: 0.5 s - 0.1 ms

TV-H

: 50 µs - 0.1 µs

SLOPE

The

switch [22] s hould be set to conform to the video sign al as

shown in the following figure

November 2000

DC

Figure 11.-

The triggering signal is DC-coupled to the trigger circuit. This mode is
used when triggering is desired with the DC component of the triggering
signal or when a signal with very low frequency or a signal with large duty
cycle ratio is needed to be displa yed.

Page 25

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

3. Function of SLOPE switch [22]

SLOPE

The

[22] switch selects the slope (polarity) triggering signal. Always select
the steepest and the most stable slope or edge. If you are ever in doubt, or have an
unsatisfactory display, try both slopes to find the best way.

+

The sweep is developed from the trigger source waveform as it crosses the

threshold level in a positive-going direction.

-

The sweep trigger is dev elope d from the tri gger so urce wav efor m as it c rosses the
threshold level in negative-going direction.

4. Function of TRIG LEVEL control [30] (LOCK [29])

The function of this contr ol is to adjust the trig gering level and display a stati onary
image. At the instant, the triggering signal has crossed the triggering level set by the
control, the swee p is trig ger e d a nd a waveform is dis pl aye d on t he s c re e n. The trigger l ev el
changes in the positi ve direction (upward) as this control knob is turned c lockwise, and it
changes in the nega tive dir ectio n (d ownw ard) as t he k nob is tur ne d cou nter cloc kwi se. T he
characteristic changes are as shown in the foll owin g figur e. Try to tri gger at the mi d poi nt of
slow-rise wavefor ms (as sine and triangul ar waveforms) since t hese are usually clean est
spots on such waveforms. See the following figure:

Page 26

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

maintained within the amplitude of the triggering signal, and stable triggering is made
without requiring level adjustment (although
mode). This automatic level lock function is effective when the signal amplitude on the
screen or the input voltage of the external triggering signal is within the following range:

November 2000

LOCK

Figure 12.-

[29]

Triggering Level selection

When LEVEL LOCK push switch is engaged, the triggering level is automatically

jitter

may not be su ppressed w hen in the ALT

OD-514B:

50 Hz to 5 MHz: 1.0 DIV (0.15 V) or less
5 MHz to 20 MHz: 2.0 DIV (0.25 V) or less

OD-515B, OD-545B:

50 Hz to 10 MHz: 1.0 DIV (0.15 V) or less
10 MHz to 40 MHz: 2.0 DIV (0.25 V) or less

Page 27

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

5. Functions of HOLD OFF control [31]

When the measured signal is a complex waveform with two or more repetition
frequencies ( periods), trigg ering with the mentioned

LEVEL

[30] control alone may not b e
sufficient to attain a stable waveform display. In such a case, the sweep can be stable
synchronised to the measured signal w aveform by adjusti ng the

HOLD OFF

time (sweep
pause time) of the sweep waveform. The c ontrol covers at least one full sweep time fo r
sweeps faster than 0.2 s/DIV.

Page 28

Figure 13.-

HOLD OFF time adjustment.

The upper part of the previous figure shows several different waveforms which

overlapped on the screen, making the signal observation unsuccessful when the

OFF

knob [31] is in the

MIN

state.

The lower part of the previou s fi gure sh ows the undesi rable portio n of the sign al is

held off. The same waveforms are displayed on the screen without overlapping.

November 2000

HOLD

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

4.3.6 Single-sweep Operation

Except OD-514B

Non-repetitive signals and one-shot transient signals can hardly be observed on
the screen with the regular rep etitive sweep o peration. Such s ignals can be measured by
displaying them in the single-sweep mode on the screen and photographing them.

Measurement of non-repetitive signal:

1. Set the

TRIGGER MODE

[28] to the

NORM

state.

2. Apply the measur e d sig nal to th e v erti cal input ter mi n al an d a dj ust the triggering

TRIGGER LEVEL

level (

3. Set the

TRIGGER MODE

[30]).

[28] to the

SINGLE

state (the three push-button

switches, AUTO, NORM and SINGLE are pushed out).

4. Press the

SINGLE

button. The sweep will run only for one cycle and the

measured signal will be displayed only once on the screen.

Measurement of single-shot signal:

1. Set the

TRIGGER MODE

[28] to the

NORM

state.

2. Apply the cal ibration outpu t signal to th e vertical i nput terminal , and adjus t the
triggering level (

TRIGGER LEVEL

[30]) at a value corresponding to the

predicted amplitude of the measured signal.

3. Set the

TRIGGER MODE

[28] to the

SINGLE

state (the three push-button
switches, AUTO, NORM and SINGLE are pushed out). Apply the measured
signal instead of the calibration signal to the vertical input.

4. Depress the

READY

SINGLE

button. The sweep circuit is now in the ready state and the

indicator lamp will be tu rned on .

5. As the one-shot si gnal occurs in th e input circuit, th e sweep runs only for one
cycle and the one-shot signal is displayed on the CRT screen. However, this
cannot be done w hen the dual-c hann el ALT mode i s in op erati on. For the d ual­channel one-sweep operation, use the CHOP mode instead.

4.3.7 Sweep Magnification

a faster sweep speed may be used. However, if the required portion is apart from the
starting point of the sweep, the required portion may run off the CRT screen. In such a
case, push in the
will be expanded 10 times to the right and left with the centre of screen as the centre of
expansion.

may become darker . In such a c ase, t he dis played wavefor m sho uld be expa nded in t he B
sweep mode as explained in the subsequent paragraph.

November 2000

When a certain part of the displayed waveform is needed to be expanded timewise,

x10 MAG

[33] button. When this has bee n do ne, t he di spl aye d w avefor m

The sweep time during the magnification operation is as follows:

Value indicated by TIME/DIV switch / 10

When the swe ep i s m agnif ied a nd t he sw ee p sp ee d is abov e 0.1 µs/DIV, th e trace

Page 29

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

Figure 14.- x10 MAG

mode

4.3.8 Waveform Magnification with Delayed Sweep

OD-545B only.

With sweep m agnification of t he preceding para graph, although the magnific ation
method is simple, the magnification ratio is limited to 10 . With the delayed sweep method of
this paragraph, the sweep can be expanded for a wider range from several times to several
thousand times according to the ratio between A sweep time and B sweep time.

As the measured signal frequency increases, the A sweep range for the non­expanded signal b ecomes higher wh ereas the availabl e expansion rati o becomes smaller .
Furthermore, as the ma gnification rati o becomes larger, the trace intens ity becomes l ower
and the delay
circuit and a triggering dela y circu it are incorpo rat ed int o the oscillosco pe.

jitter

increases. To cope with these situ ations, a conti nuously var iable delay

1. Continuous variable delay

1. Set the HORIZ. DISPLAY MODE switch [38] to A and display the signal
waveform with the

TIME/DIV
TIME/DIV

switch [18] to a position several steps faster than that of the

switch.

A

sweep in the regular operation mode.

Next, set the

B
A

Page 30

2. Ensure the

B TRIG’D

button of the HORIZ. DISPLAY MODE switch is

disengaged,

3. Engage the HORIZ. DISPLAY MODE switch [38] to the

A INTEN

position. A
portion of the displayed waveform will be accentuated as shown in the following
figure, indicating the state ready for delayed sweep. The portion of the
accentuated brightness indicates the section corresponding to the B sweep time
(DELAYED SWEEP). This portion is expa nd ed on t he B swee p.

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

NOTE:
The portion of accentuated brightness will be small if the B TIME/DIV
switch selected p osition is man y step s fast er than t hat of A TIME /DIV
switch.

4. Rotate

B TIME/DIV

switch [18] until the portion of accentuated brightness
becomes as wide as the portion to be magnified. The portion of accentuated
brightness corresponds to be delayed sweep section.

5. The period from the start of the A sweep to that of the B sweep (the period to
the start of trade accentuation) is called “
continuously variable by means of the
change the

HORIZ. D I SPLAY

MODE switch [38] to the B position.

SWEEP DELAY TIME

DELAY TIME POSITION

”. This period is

knob [35]. Ne xt,

6. Change the HORIZ. DISPLAY MODE switch [38 ]to the B position. The B
sweep time will be expand ed fo r th e fu ll span of the CRT scree n .

occurs when A sweep crosses the triggering level set by the
the display waveform is magnified by 100 or higher, delay

triggering si gnal of multi ple or su bmultiple p eriod. Then
minimum delay time between A and B; The real delay time will be that time plus the
additional time needed to reac h the next avail able trigger ing pulse . As a result , the starti ng
point of the sweep moves discretely, not continuously, in triggering pulses period steps.

November 2000

Figure 15.- A & B INTEN mode

2. B Triggering delay

When in B delayed sweep, the sweep is not triggered with a signal. Triggering

The

DELAY TIME

jitter

is produced.

jitter

is reduced by triggering the B sweep with the same signal, or with a

DELAY TIME

knob [35]. When

control [35] s ets the

Page 31

The maximum magnificatio n availabl e is of sev eral thousa nds, becomi ng the CRT

brightness the limiting factor.

For this operation proceed as follows:

1. Set the oscilloscope as in the continuous variable delay, as describe in the
previous paragraph.

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

2. Engage the

B TRIG’D

control [30]. N ow B sweep is triggere d by the same triggering puls e as the
sweep. B sweep always starts at the pr evi ous or fol lowi ng fl ank o f t he tri ggeri ng
pulse; it will not change e ven if ro ta t ing

4.3.9 Readout Functions

OD-545B only.

The selected s ensitivity, input, sweep time, etc.. are displayed in t he positions as

shown in the following figure.

button [38] and, if necessary, adjust Trigger

DELAY TIME

POSITION [35] cont ro l.

Figure 16.-

LEVEL

A

Page 32

Figure 17.- OD-545B

on-screen indications

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

CH1 Display

CH1

of
is at

(a)

When the

VERT MODE

switch [39] i s at

are displaye d at ( 1). Howev er, t hese val ues ar e not s hown whe n the

CH2

.

P10

This sign is shown when the probe x10 is set.

CH1, DUAL

or

ADD

state, the se t values

VERT MODE

(b)> This sign is shown when the V/DIV VAR. is at UNCAL position.
(c) Display the sele cted sen sit ivit y f rom 1 mV to 5V. (Probe x10 f rom 10 mV to 50 V )
(d) x This sign is displayed when the X-Y button is set and the VERT MODE is at

CH2. At DUAL X-Y mode,

y1

is displayed.

CH2 Display

Set values of CH2 signal are displayed at (2) when the

CH2, DUAL or ADD

. They are not displayed when the

VERT MODE

VERT MODE

[39] is at the CH1

[39] is at

mode.

P10

(a)
(b)

This sign is shown when the probe x10 is setted.

>

This sign is shown when the V/DIV is at UNCAL position.
(c) Display the selected sensitivity from 1 mV to 5V. (Probe x10 from 10 mV to 50 V)
(d) y This sign is shown at X-Y mode. y2 sign is shown at DUAL X-Y mode.

ADD (SUB) & CH2 INV Display

ADD, SUB

The

(a) + This is shown when the

and

INV

functions are displayed at (3).

VERT MODE

[39] is at

ADD

position, then the inputs

CH1 & CH2 are algebraically summed.

(b)↓ This sign is displayed when the

INV

button [36] is en gaged .

VERT MODE

[39] is at

CH2

or

DUAL

TIME Display

The sweep time is displayed at (4). The A sweep time is shown at the under row, the

B

sweep time is shown at th e uppe r row (B swee p fo r O D- 5 45B only)

(a)A and B are shown at A and B sweep time at the proper row.
(b)= Is shown normally.

*

Is displayed when th e

>

Is displayed when th e

(c) Shows th e sel ec t ed sweep time from 10 ns to 0.5 s . A n

x10 MAG

button [33] is pushe d in .

SWP. UNCAL

button [19] is engaged .

X-Y

is dis play e d wh en th e X- Y

button is pushed in.

CHOP / ALT Display

When

CHOP

The

X-Y

button is engaged, an

or

ALT

are displayed at (5) wh en th e V ERT

X

is displayed.

EXT

MODE

[39] is set to

and the

DUAL

CH2

.

November 2000

Page 33

TV-V / TV -H Displa y

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

The

TV-V

or

TV-H

” are displayed at (6) when the TRIGGER

to TV position.

Cursor Measured Value Display

The relative measured values of the seven functions are displayed at (7).

(a) Shows each of seven functions (

which may be selected by the CURSOR FUNCTION button. The 'V functio n
provide differen t 'V ('V1, 'V2, 'V12, 'V
table:

CH1 CH2 DUAL ADD

CH1

TRIG.

SOURCE

CH2

LINE

'

V1

EXT

X-Y *1

*1: When X-Y mode is not set at correct position, the error message

COUPLING

'

V, 'V%, 'V dB, 'T, 1/'T, DUTY, P H AS E)

, 'Vy1) according to the following

y

[25] is set

VERT. MODE

'

V1

'

V2

'

V

y

'

V2

'

V

y1

X-Y mode error

'

V2

*1

is shown.

(b) In the 'V function, a + or - polarity is shown.

+ when the ∇ (delta) cursor is above the  (REF.) cursor.

- when the ∇ (delta) cursor is below the  (REF.) cursor.

(c) Display the measured value and its units:

'

V 0.04 V to 40.0 V (400 V for PROBE x10)

NOTE: When the V/DI V VAR. is set to uncalibrated positi on, or
when the VERT MODE is at ADD but the CH1 & CH2
sensitivities on V/DIV are not the sa me, the measured value is
displayed in divisions (0.0 0 to 8. 00 div. ).

'

V% 0.0% ~ 160% (5 div. = 100% reference)

'

V dB -41.9 dB ~ +4.08 dB (5 div. = 0 dB reference)

'

V dB = 20 log 'V(div.) / 5 div.

'

V(div.): measured difference division value.

'

T 0.0 ns ~ 5.00 s

NOTE: When the SWP UNCAL button is pushed in, the
measured value is displayed in divisions (0.00 to 10.00 div.).

1/'T 200.0 mHz ~ 2.500 GHz

NOTE: When the SWP UNCAL button is pushed in or two

cursors are overlap, the unknown value displays “????”.
DUTY 0.0% ~ 200.0% (5 div. = 100% reference)
PHASE 0.0° ~ 720° (5 div. = 360° reference)

Page 34

NOTE: When the functions ('T, 1/'T, DUTY, PHASE) are

selected and then the X-Y button is engaged, the unknown value

displays “????”.

November 2000

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

5. MAINTENANCE

5.1 Instructions for returning by mail

Instruments returned for repair or calibration, either within or outwith the guarantee
period, should b e f or w ar d ed with the followin g inf or m ati on : N am e o f C o mp any , n am e of t h e
contact person, address, telephone number, receipt (in the case of coverage under
guarantee) and a description of the problem or the service required.

5.2 Mains fuse replacement

Fuse holder is located in the mains socke t.
To replace the fuse perform the following operations:

1) Disconnect the mains cord.

2) Remove the fuse holder lid by means of a suitable screwdriver

3) Replace the damaged fuse for another one with the same characteristics.

FUSE CHARACTERISTICS: 5 x 20 mm, 250 V, SLOW (T) AND:

0.63 A FOR 100, 120 V

0.315 A FOR 220, 230 V

THE EQUIPMENT CAN BE DAMAGED IS THIS INSTRUCTIONS ARE NOT
STRICT LY FOLLOWED .

4) Replace the fuse ho lde r lid , align ing ma rk w ith the de sire d ma in s volt age ma r k.

November 2000

Page 35

OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL

5.3 Fuses that Cannot be Replaced by the User

This fuse can only be replaced by qualified personnel. It is located on the

HORIZONTAL PCB and Its position identifier and characteristics are the following:

POSITION IDENTIFIER CHARACTERISTICS

F602 0.315 A – T – 250 V 5 x 20 mm for PCB

5.4 Cleaning Recommendations

CAUTION

To clean the cover, be sure the unit is turned off.

CAUTION

Do not use scented hydrocarbons or chlorized solvents. Such products may attack
the plastics used in the construction of the cover.

The cover should be cleaned by means of a light solution of detergent and water

applied with a soft cloth.

Dry thoroughly before using the syst e m aga in.

Page 36

November 2000