Philips PM3055 User manual

60 MHz Dual Time Base Oscilloscope
PM3055
PM305/7
Operation Manual/Gebrauchsanleitung/Notice d’emploi
4822 872 00375
861222/1
Industrial & Electro-acoustic Systems Division
pHiips| Industrial & |
2 Electro-acoustic Systems )

60
MHz
Dual
Time
Base
Oscilloscope
PM3055
PM3057
Operation
Manual/Gebrauchsanleitung/Notice
d'emploi
4822 872 00375
861222/1
BM 3055 PHILIPS
wvTeNS.
ov GIG
°
=~
PHILIPS

IMPORTANT
In correspondence concerning this instrument, please quote the type number and serial number as given on
the type plate.
NOTE: The design of this instrument is subject to continuous development and improvement.
Consequently, this instrument may incorporate minor changes in detail from the information
contained in this manual.
WICHTIG
Bei Schriftwechsel tiber dieses Gerat wird gebeten, die genaue Typenbezeichnung und die Gerdtenummer
anzugeben. Diese befinden sich auf dem Leistungsschild.
BEMERKUNG: Die Konstruktion und Schaltung dieses Gerdts wird standig weiterentwickelt und verbessert.
Deswegen kann dieses Gerat von den in dieser Anleitung stehenden Angaben abweichen.
IMPORTANT
RECHANGE DES PIECES DETACHEES (Réparation)
Dans votre correspondance et dans vos réclamations se rapportant 4 cet appareil, veuillez TOUJOURS
indiquer le numéro de type et le numéro de série qui sont marqués sur !a plaquette de caractéristiques.
REMARQUES: Cet appareil est Il’objet de développements et améliorations continuels, En conséquence,
certains détails mineurs peuvent différer des informations données dans la présente notice
d’emploi et d’entretien.
© N.V. PHILIPS GLOEILAMPENFABRIEKEN - EINDHOVEN - THE NETHERLANDS - 1986
PRINTED IN THE NETHERLANDS
prenereeny
at
cena

60 MHz DUAL TIME BASE OSCILLOSCOPE
PM3055 - PM3057
Supplement
The PM3055 - PM3057 has been upgraded to a bandwidth of 60 MHz. The following list gives the differences to the
basic Operation Manual.
Section 5.2.1
* Bandwidth at 20 mV ...
* Max. dynamic range
at 1MHz
at 10 MHz
Section 5.2.2
* Bandwidth:
Via A or B channel
at 20mV... 10 V
Via EXT input
Section 5.3.2
* Variable control ratio
Section 5.4.1
* Level range:
DC internal
DC external
Trigger sensitivity:
Internal at 100 MHz
External at 100 MHz
Section 5.4.2
* Trigger level range
10 V
> 60 MHz
(amb. 0... 35°C)
> +/—12 div.
deleted
> 50 MHz
(amb. 0... 35°C)
> 60 MHz
(amb. 0... 35°C)
deleted
> (tor— 8 div.)
> (+or— 800 mV)
< 3,0 div
500 mV
<_ (tor— 8 div)
Input 6 div. sinewave.
Vernier in cal. position.
Input 6 div. sinewave.
Input 6 div. sinewave,
+/—3 div from screen centre
Trig. coupling DC
Trig. coupling DC
NR A ewer
Die
Bandbreite
des
PM3055
und
PM3057
ist
erhéht
worden
nach
60
MHz.
Die
folgende
Liste
gibt
die
Differenzen
an
mit
der
Gebrauchsanleitung.
Abschnitt 5
* Die Anwérmzeit des Gerates ist 30 Minuten.
Abschnitt 5.2.1
* Bandbreite bei 20 mV bis 10 V > 60 MHz
* Max. Dynamikbereich
bei 1 MHz
bei 10 MHz
Abschnitt 5.2.2
* Bandbreite:
Uber Kanal A oder B
bei 20 mV bis 10 V
Uber EXT Ejingang
(Umg. 0 ... 35°C)
> +/—12¢em
Entfernt
> 50 MHz
(Umg. 0... 35°C)
> 60 MHz
(Umg. 0 ... 35°C)
Sinusspannung 6 cm.
Feinsteller in Pos. CAL.
Sinusspannung 6 cm.
Sinusspannung 6 cm.,
. +/—3 em ab Schirmitte

Abschnitt 5.3.2
* Variabeles steuerverhaltnis
Abschnitt 5.4.1
* Pegelbereich:
DC Intern
DC Extern
Trigger Empfindlichkeit:
Intern bei 100 MHz
Extern bei 100 MHz
Abschnitt 5.4.2
* Trigger-Pegelbereich
Entfernt
> (+toder— 8 cm}
> (+toder— 800 mV)
< 3,0 cm
500 mV
> (+oder— 8 cm)
Trigger-Kopplung DC
Trigger-Kopplung DC
ee
Nt
La
limite
de
ta
bande
de
passage
du
PM3055
et
du
PM3057
est
augmenté
jusqu
4
60
MHz.
La
liste
suivante
présente
les
différences avec la notice d’emploi.
Section 5
* Le temps de chauffage de !’instrument est 30 minutes.
Section 5.2.1
* Bande passante
de20mVa10V
* Gamme dynamique maxi.
4 1MHz
410 MHz
Section 5.2.2
* Bande passante:
par kanal A ou B
de 20 mV 410 V
par entré EXT
Section 5.3.2
* Rapport de commande variable
Section 5.4.1
* Plage de niveau:
CC interne
CC externe
Sensibilité de déclenchment:
Interne 4 100 MHz
Externe a 100 MHz
Section 5.4.2
* Plage de niveau de
déclenchement
> 60 MHz
(amb. 0... 35°C)
> +/-12 div
éloigné
> 50 MHz
(amb. 0 ... 35°C)
> 60 MHz
(amb. 0 ... 35°C)
éloigné
> (tou— 8 div)
> (+ou— 800 mV)
< 3,0 div
500 mV
> (tou— 8 div)
Sinusoide 6 div.
Vernier en position étal.
Sinussoide 6 div.
Sinussoide 6 div.,
+/—3 div depuis le centre de |‘ecran.
Décl. 4 couptage CC.
Décl. 4 couplage CC.
Stipa ecteneas
serorttncarc
vei
perenne
Sis naa,
promenmesta
peoroesrny Heo eran
procenscne
pone
—
L

tas | PHILIPS
fe] Advanced Automation Systems A
Audio-communications Industrial &
e rv i Broadcast Equipment Electro - acoustic
Electronic Security & Recording Systems
Industrial Automation Systems
Information S2usisexsewre | Division
870129 TEST AND MEASURING EQUIPMENT ESU305501.1.
SUPPLEMENT TO OPERATING MANUAL PM3055-PM3057
4822 872 00351
This ESU replaces ESU: -
Subject: APPLICATION SELECT
This instrument offers the possibility to pre-select different applications by
using the "AS" -~APPLICATION SELECT- service menu.
To enter this menu, proceed as follows:
- Press the MENU softkey and keep it pressed.
~- Then press also the AUTO SET softkey.
~ Now the LCD should indicate "1", "2", "AS" and "3".
- To enter the AS menu, press the RESET softkey.
Having entered this menu, the following applications can be choosen:
* SINGLE SHOT
Is selected by pressing "V" of channel A UP-DOWN control, indicated in LCD
by 0 or 1.
Selecting "0" means that when using in alternated multi channel mode and
the SINGLE SHOT mode, only one signal is displayed on the screen.
Selecting "1" means that when using in alternated multi channel mode and
the SINGLE SHOT mode, all signals are displayed on the screen.
* TV TRIGGERING AFTER AUTO SET
Is selected by pressing "V" of channel B UP-DOWN control, indicated in LCD
by 0 or 1.
Selecting "0" means that if TVF or TVL trigger coupling was selected, after
AUTO SET always TVF is choosen as MTB trigger coupling.
Selecting "1" means that if TVF or TVL trigger coupling was selected, after
AUTO SET the already selected TV trigger coupling will be choosen.
4822 872 09357
PRINTED IN THE NETHERLANDS

ACTIVE DIB AFTER AUTO SET
Is
selected
by
pressing
"<-"
cof
DIM
UP-DOWN
control,
indicated
in
LCD
by
"0 or 1",
Selecting
"0"
means
that
for
all
horizontal
display
modes,
after
AUTO
SET
the
time
base
is
set
to
the
MTB
mode.
Selecting
"1"
means
that
for
all
horizontal
display
modes,
after
AUTO
SET
the
horizontal
display
mode
stays
in
its
previous
setting.
So
the
DTB
ig
still
active
if
selected
before
AUTO
SET.
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Operation Manual

CONTENTS
1. OPERATORS SAFETY
1.1
1.2
1.3
1.4
1.5
Introduction ........ Tach alle wOMairet aint sshue eesuina ce carer sei oayer euece, Greece ce Mth atta Messed ne ve
Safety precautions 2.0... ce ee ee eee eens ba eas wo eR ONG
Caution and warning statement .. 0... 0 ce et te tee nee
SYMONS 5 5 hea bo lein Sd ROSlOa te abies Sw) 8s eer Wate tan See awe a Ss ele Bead Ryeve fete etay ees
Impaired safety-protection ... 2... ee ee eee eee tee te ee eee
2. INSTALLATION INSTRUCTIONS
2.1
2.2
2.3
2.4
2.2.1
2.2.2
Initial inSpeCtion: «4.5 o6 koe yea eee ee Sob Sib ee BAS, Bark bd Sia BSNS eae Ra eee
Safety instructions: 23s ssicece GoSc6. 6 Wher Bb eee w Aiea oe eee ed ee ae eae Be
Earthy iti cre esses ea er ene aa sates Se eeagh gence REN elk is etenes eed Ee a Reta alae
Mains voltage cord and fuses... 0... cee ee eee eet tte ee ee teen
Operating position of the instrument .... 0... 0. ccc cee eee eee tee
RaCKINIOUNT VERSION 2 esac c Sacco ces dred a hice Siaicsd day acaba aye let ea eile AS eae eee ae a tee
3. OPERATING INSTRUCTIONS
3.1
3.2
3.3
3.4
3.1.1.
3.1.2
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.4.1
3.4.2
3.4.3
Switching-on and auto-set 2... ee ee eee tee eee
SWITCHING-ON 3 iii eisai ee er A Oe aR a a eee we ee
PUTO SOU sitio hee ls EN iene eee Sein be OE Ala Ge Dea Re Bow 6 Ge eee doa Teel t
Explanation of controls and sockets... 1... . eee ee ee tee eee
[NtrOGDUCTION ». 5.) x eed oe, Sea eal ae Bee la ee Be ee eee Re ee LG. ws
CuR AT: CONTON ald! sac. sree hee a eee aE oe Bw eR we D G8 8 aL el ae) ep ew eee QUE 8
Up-down control area 2... ee ee eee eee ee eee ee ee
FUNCTION: CONTON ACA cic. ce cdi evo vce snes Be ahs, Bw ve wt ad oe eine bs at eee wea we aa
Potentiometer area 2... ee tte ee eee we eae a uh a
Inputs and outputs ........... Spec! eile, “Bas pence, at Dus ines: Bova Day D dere) hay Gira ten ect ok gsc Owe ae
Rear: panels ec 068 wna an sane atwie ards Po xk Hoaletarac le, GUN SOAS, Grama Rive aivehur bie ehes eke
Principle of operation 2.0... ee ee ee eee eae
Controlsection — x23 eae Eee ie Be iw Be Wee WE BA te Sa a eee
Vertical deflectione esd wee ec hoes Cw Dis AO he Wb Ab etter bw ee ae a
Horizontal deflection: 0:0 6. 65.28 vals acd at era ace ee Be Boe ey Aalst wee a a
CRTs Display: isis asa) eth seen 86 oat Ske ee eas Gea batten as ante ae Be alee lara ayer
Power: SUDDIY se: 5 Soe ie alae ik eS alae wl eae aks OR ela le ie BE Be Se ea
Brief checking procedure .. 0... ee ce ee eee hays
General information: 20.640 ce Se eee hee ee ee ene Se Maw eed wae
Entering the brief checking procedure .. 1... ... cece eee ee eee eens .
Brief checking of controls and functions .. 0... 0... cee ee ce ee ee ee ee eens
Page
2-1E
2-1E
2-1E
2-1E
2-1E
2-2E —
2-2E

11-E
4. PREVENTIVE MAINTENANCE 4-1E
4.1 General information .. 0.0.0.0... 00 ccc ee ee ee ee een een ee nnn 4-1E
4.2 Removing the bezel and contrast filter... 2... ee ee ee ee ee ee cane 4-1E
4.3 Recalibration jc0 3.54 neste a oe ea eee os ww Bo eh Rees abe 4-1E
5. CHARACTERISTICS 5-1E
5.1 Displayicrsese vse 2 Ravee eos eal eds ake o DG ai eeielnd Mee we waren eek tas 5-2E
5.2 Vertical deflection or Y axis 2... ee ee ee eee ene tenes 5-2E
5.2.1 ChannelsAandB .... ee ee ee ee eee tenet eae neeuee 5-2E
6.2.2" TRIGUERVIOW: as a Ge we be ted Gin a eas ds Soa. g ee tha Jee ble os Sd Wavetiece Bee's 5-3E
5.3 Horizontal deflection X axis... 0... ee ee eee teen ene e ene eeees 5-4E
5.3.1. Main: Time:Base: 3. -cacw fda ene ea See bale tae we lee bee aoe we ae wo ale es 5-4E
5.3:2: , Delay Time: Base=:. a. ssc ag ato pels Gah wees aoe Ede waded oS RE i deaea ahs 5-5E
5.3.3 X-deflection ......... 002s vce cee eee tsuetcenoeae Saari Sababed ted eat sdeieeaee eae 5-5E
5.3.4 EXTinput............ Bi Sd wehudoantiks, ohh ard heat we ataearug Gee alk BM NES oe athe 5-5E
5.4 TEPIGGOTING) 6 seed Stee ctse Ee tend cesta big Wo pdb oe Wek deceeet Wi Smite: eneace uo Re alates 5-6E
5.4.1 MTBtriggering...... ee ee eee ee ee ee patereabwoure acd nane aan ene 5-6E
D4.2) DT B trigger ding esse: ssgete'y aks ave o eee oon 4 ow oo eaeg teva ea le ele wud bed 4 EG ie eo aa Bes 5-7E
55 Power supply... 0.0.2.0... ccc eee ueeeeaees A ratte tte, Suk atae ais 5-7E
5.6 Auxiliary inor outputs 2.0.0... eee ct ee ee ee ee eee beeen eas 5-7E
. 5.7 Environmental characteristics 2.0... 0... ee ee eee ee nee enes 5-8E
58 SATOUY 5s Saat Bese reads ae hate a Santen Bt ata s ARSE ese hy Sh ite aa St an a Mastic tA Rach gle were eee eae 5-9E
5.9
AACCESSOMIOS
7
3312
Tales
bid ida
ans
faust
ducks
aslo
el
aCe
tec
tac
ir
Oye
omy
Oats
Se
Raha
ce
HES
etd
Aiea
ha
hades
es
ook
5-10E
5.9.1 Accessory information... 0.0.0.0... ccc eee eee eee ee eee e enn enna 5-10E
6. GLOSSARY OF TERMS 6-1E
APPENDIX A Al
APPENDIX B B1
pascarees
preeeias

1.1
1.2
1.3
1.4
1.5
OPERATORS SAFETY
Read this page carefully before installation and use of the instrument.
INTRODUCTION
The
instrument
described
in
this
manual
is
designed
to
be
used
by
properly-trained
personnel
only.
Adjustment,
maintenance
and
repair
of
the
exposed
equipment
shall
be
carried
out
only
by
qualified
personnel.
SAFETY PRECAUTIONS
For the correct and safe use of this instrument it is essential that both operating and servicing personnel
follow
generally-accepted
safety
procedures
in
additon
to
the
safety
precautions
specified
in
this
manual.
Specific
warning
and
caution
statements,
where
they
apply,
will
be
found
throughout
the
manual.
Where
necessary, the warning and caution statements and/or symbols are marked on the apparatus.
CAUTION AND WARNING STATEMENTS
CAUTION:
_
is
used
to
indicate
correct
operating
or
maintenance
procedures
in
order
to
prevent
damage
; to or destruction of the equipment or other property.
WARNING:
_
calls
attention
to
a
potential
danger
that
requires
correct
procedures
or
practices
in
order
to
prevent
personal
injury.
SYMBOLS
Protective earth (black)
(grounding) terminal
Read the operating
instructions.
IMPAIRED SAFETY—PROTECTION
Whenever it is likely that safety-protection has been impaired, the instrument must be made inoperative and be
secured against any unintended operation. The matter should then be referred to qualified technicians. Safety
protection is likely to be impaired if, for example, the instrument fails to perform the intended measurements
or shows visible damage.

2.1
2.2
2.2.1
2.2.2
INSTALLATION
INSTRUCTIONS
ATTENTION:
You
are
strongly
advised
to
read
this
chapter
thoroughly
before
installing
your
oscilloscope.
INITIAL INSPECTION
Check
the
contents
of
the
shipment
for
completeness
and
note
whether
any
damage
has
occurred
during
transport.
If
the
contents
are incomplete,
or
there is
damage,
a
claim
should
be
filed
with
the
carrier
immediately,
and
the
Philips
Sales
or
Service
organisation
should
be
notified
in
order
to
facilitate
the
repair
or
replacement
of
the
instrument.
SAFETY INSTRUCTIONS
Earthing
Before
any
connection
to
the
input
connectors
is
made,
the
instrument
shall
be
connected
to
a
protective
earth
conductor
via
the
three-core
mains
cable;
the
mains
plug
shall
be
inserted
only
into
a
socket
outlet
provided
with
a
protective
earth
contact.
The
protective
action
shall
not
be
negated
by
the
use
of
an
extension
cord
without
protective
conductor.
WARNING:
Any
interruption
of
the
protective
conductor
inside
or
outside
the
instrument
is
likely
to
make
the
instrument
dangerous.
Intentional
interruption
is
prohibited.
When
an
instrument
is
brought
from
a
cold
into
a
warm
environment,
condensation
may
cause
a
hazardous
condition.
Therefore,
make
sure
that
the
earthing
requirements
are
strictly
adhered
to.
Mains voltage cord and fuses.
Different
power
cords
are
available
for
the
various
local
mains
voltage
outlets.
The
power
cord
version
delivered
is
determined
by the
particular
instrument
version
ordered.
NOTE:
|f
the
mains
plug
has
to
be
adapted
to
the
local
situation,
such
adaptation
should
be
done
only
by
a
qualified
technician.
This
oscilloscope
has
a
tapless
switched-mode
power
supply
that
covers
most
nominal
voltage
ranges
in
use:
100
V...240
V
a.c.
(r.m.s.).
This
obviates
the
need
to
adapt
to
the
local
mains
voltage.
The mains frequency range is 50 Hz...400 Hz.
WARNING:
The
instrument
shall
be
disconnected
from
all
voltage
sources
when
renewing
a
fuse.
UN Mains fuse rating: 1,6 A delayed-action, 250 V.
The
mains
fuseholder
is
located
on
the
rear
panel
(see
Figure
2.1).
lf
the
mains
fuse
needs
replacing,
proceed
as
follows:
— remove the cover of the fuseholder by means of a screwdriver.
— fit a new fuse of the correct rating and refit the cover of the fuseholder.
WARNING:
Make
sure
that
only
fuses
of
the
required
current
and
voltage
rating,
and
of
the
specified
type,
are
used
for
renewal.
The
use
of
the
repaired
fuses,
and/or
short-circuiting
of
the
fusehoider,
is
prohibited.

2-2E
F
Figure
2.1
Rear
view
of
the
oscilloscope.
|
é
2.3
OPERATING
POSITION
OF
THE
INSTRUMENT
The
oscilloscope
may
be
used
in
the
following
positions:
— horizontally on its bottom feet;
— vertically on its rear feet:
—
on
the
carrying
handle
in
two
sloping
positions
(see
Figure
2.2)
The
available
oscilloscope
angles
with
respect
to
the
working
surface
are
13°
and
20°
selected
after
pulling
\
the
carrying
handle
arms
outwards
and
rotating.
The
characteristics
given
in
Chapter
5
are
fully
guaranteed
for
all
the
above-mentioned
positions.
ATTENTION:
Do
not
position
the
oscilloscope
on
any
surface
which
radiates
heat,
or
in
direct
sunlight.
MATING
Figure 2.2 Handle in different positions.
2.4 RACKMOUNT VERSION
The
PM3057
is
provided
with
a
rackmount
cabinet
without
carrying
handle.
This
offers
the
possibility
to
built
the
instrument
in
a
19
inch
rack,
using
the
delivered
screws.
/

3.1
3.1.1
OPERATING
INSTRUCTIONS
This
chapter
outlines
the
procedures
and
precautions
necessary
for
operation.
It
identifies
and
briefly
describes
the
functions
of
the
front
and
rear
panel
controls
and
indicators,
and
explains
the
practical
aspects
of
operation
to
enable
an
operator
to
evaluate
quickly
the
instrument's
main
functions.
SWITCHING—ON AND AUTO-SET
Switching-on
After
the
oscilloscope
has
been
connected
to
the
mains
(line)
voltage
in
accordance
with
Section
2.2.1
and
2.2.2
it
can
be
switched
on
with
the
POWER
ON
pushbutton
on
the
front
panel.
immediately
the
oscilloscope
is
switched
on,
all
segments
of
the
L.C.D.
light
up
for
1
sec.
approx.
and
the
oscilloscope
is
set
in
the
RESTART
condition
(see
Figure
3.1).
;
With
normal
installation,
according
to
Chapter
2,
and
after
a
warming-up
time
of
30
minutes,
the
characteristics
according
to
Chapter
5
are
valid.
Attention:
Take
care
that
the
time
between
switching-off
and
switching-on
again
is
at
least
5
s.
A
shorter
time
interval
might
activate
a
protection
circuit
in
the
power
supply
that
prevents
it
from
starting
up.
If
this
protection
circuit
is
yet
activated,
(a
squeaking
noise
can
be
heard),
it
can
be
de-actived
simply
by
switching
off
the
instrument
for
5
s.
Auto set
Attention:
The
AUTO
SET
is
only
effective
when
an
input
signal
is
applied
to
the
channel
A
or
B
BNC
input
socket.
The
AUTO
SET
allows
you
to
set
all
softkeys
and
UP—DOWN
controls
with
one
single
pushbutton
for
a
clear
display
of
any
input
signal.
This
can
be
used
as
a
starting
point
for
any
refinements
in
the
setting
of
the
softkeys
which
may
be
needed
for
a
thorough
investigation
of
complex
waveforms.
For this, proceed as follows:
— Apply the signal to input A and/or B.
— Set both Y POS and X POS controls to their mid-position.
—
Press
AUTO
SET
:
—
Notice
that
a
clear
display
with
2
signal
periods
approx.
and
2...5
DIV
amplitude
is
visible
on
the
screen.
Note:
When
no
signal
is
applied
to
any
BNC~input
socket,
the
RESTART
procedure
can
be
used
to
obtain
a
presetting
of
the
softkeys
and
UP—DOWN
controls.
The
instrument
can
be
restarted
by
pressing
MENU
and
AUTO
SET
in
sequence.
‘
PM
3055
SOMHz
PHILIPS
yrace
ROTATION
FOCUS
‘LUM
caLtay SL
*
Figure 3.1 RESTART condition.

3-2E
3.2 EXPLANATION OF CONTROLS AND SOCKETS . r
3.2.1 Introduction
The front panel is designed with optimum ergonomic and logical- order placing of the controls: from teft to
right and from top to bottom, like reading a book.
- For ease of access to: the oscilloscope controls and sockets, the frontpanel is divided into six main areas
(see Appendix A).
— C.R.T. control area (see section 3.2.2)
— Viewing area, (C.R.T. including L.C.D.)
~— Up-down control area (see section 3.2.3) ey
— Function control area (see section 3.2.4) | F
— Potentiometer area (see section 3.2.5)
— Inputs and outputs (see section 3.2.6)
ereesrrnninven,
Liquid Crystal Display (L.C.D.)
The L.C.D. displays the different switch and control functions in one place on the front panel,
The L.C.D. area is divided into the following parts. .
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A
TRIG
VIEW
ALT
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Y-DISPLAY SELECT *
B AOD CHOP [
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CHANNEL B
4 Acoc : i
Soe Soe a | :
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MIBIX-DEFL DIB | *O!SPLAY seer 7
AUTO TRIG SINGLE fi
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DELAY TIME ; i
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MAT 2144 oH
851115 Hy
Figure 3.2 Liquid Crystal Display oe
Note: A flashing segment indicates that a wrong combination of softkeys is selected, that a VAR (variable) =
control is in UNCAL position (segment :.>) or that the end of range of an UP—DOWWN control
has been reached. : _
ees

3-3E
Up-Down controls
These
switches
permit
selection
of
the
deflection
coefficients
or
correct
display
time
in
a
up-going
or
down-
going
sequence
dependent
on
which
part
of
the
pushbutton
is
depressed.
UP GOING SEQUENCE DOWN GOING SEQUENCE
MAT 1804
Softkeys
This
oscilloscope
features
the
possibility
to
select
several
functions
with
a
single
pushbutton
in
sequential
order
under
control
of
the
microcomputer.
To
obtain
the
correct
function
it
is
necessary
to
press
the
particular
pushbutton
repeatedly
until
the
correct
indication
is
visible
in
the
L.C.D.
The
sequence
of
the
softkeys
with
the
related
L.C.display
is
given
in
the
following
figure.
Note
that,
after
the
last
function
in
line,
the
sequence
starts
again.
CHANNEL A AND B
Example:
AUTO
set GNO aciDCc
_
CHANNEL
A
A/a
oGNoP
VIEW
DISPLAYED []
ADD
| | [1
DISPLAYED
AaB 1s TB TRIG
7] SELECT MODE RESET
L—J
TRIG or X TRIG
SOURCE SOX COUPL
za
ao u 2
NO CHANNEL
EXT
MENU) = AC/0C
2 CHANNEL B
DISPLAYED
DISPLAYED
[| |
(CRO
MAT2141E
851115
Figure 3.3 Sequence of the A/B softkey.

3-4E
3.2.2
3.2.3
C.R.T. control area
Knob/control Description
POWER Mains ON/OFF switch
INTENS Continuously-variable contro! of the trace
TRACE ROTATION
FOCUS
ILLUM
Up-down control area
brilliance on the C.R.T. screen.
Screwdriver control for aligning the trace in
parallel with the horizontal graticule lines.
Continuously-variable control of the focussing
of the C.R.T. electron beam.
Continuously-variable control of the graticule
illumination.
LCD UP-DOWN switch Description
= 7 = Selection of the ch.A deflection coefficients
ti v ;
ru a from 2 mV/DIV...10 V/DIV ina
SOG0D..) ov iile 10
1-2-5 sequence.
Selection of the ch.B deflection coefficients
from 2 mV/DIV...10 V/DIV ina
1-2-5 sequence.
Selection of the main time base deflection
coefficients from 50 ns/DIV...0,5 s/DIV in
a 1-2-5 sequence.
Selection of the delayed time base deflection
coefficients from 50 ns/DIV...1 ms/DIV in
a 1-2-5 sequence. The DTB control is
electrically coupled with the MTB up-down
control. The DTB time coefficient can never
be slower than one step faster than the value
of the MTB time coefficient. (exception is
the fastest position of the MTB-speed).
Delay time multiplier control.
— LCD is time-related when the MTB is
calibrated and when STARTS is selected
as DTB trigger source
— LCD is division-related when the MTB ts
not calibrated or when DTB is in triggered
condition
NOTE: when switch is depressed for a short
period, delay time changes step by
step.
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3.2.4 Function control area
cr
cD sequence
3-5E
SOFTKEY REMARKS
AUTO
SONY cd arte i INPUT SIGNAL
iene me IS INTERRUPTED
(INPUT SIGNAL
FED TO
ATTENUATOR A
AC-COUPLED
OC-COUPLED
INPUT
CHANNEL A AND B
DISPLAYED
CHANNEL B
DISPLAYED
A CHANNEL A
DISPLAYED
NO CHANNEL
DISPLAYED
auto Softkey to set automatically the attenuator/s
V/DIV and time speed s/DIV to an optimal
diplay, provided that the Y POS and X POS
controls are in mid-position.
sxo Interruption of channel A input signal, while
the attenuator is connected to ground.
Note: 1. When grounded the trig. mode will
automatically set to auto free-run.
2. When grounded the composite trig.
source will automatically set to
ch. B trig. source, provided that a
signal is applied to ch. B.
acec Channel A input coupling.
AB
Selection for the vertical display modes channel
A and channel B.

3-6E
rc
cD sequence
SOFTKEY REMARKS
aw, ALTERNATED
ALT DISPLAY
CHOPPED
CHOP DISPLAY
1 oe ahi fa OE
TRIGGER VIEW
TRIGVIEW
}--
DISPLAYED
TRIGGER VIEW
NOT DISPLAYED
es NORMAL DISPLAY
Jl
INVERTED DISPLAY
(ONLY CH. B)
CH. A+ CH.B
ADD _ DISPLAYED
CH.A- CH. B
ADD INV ae DISPLAYED
Fe Sati eee a Sn oleae a eae SS ty
fia an _ INPUT SIGNAL
tod tot 1S INTERRUPTED
INPUT SIGNAL
FED TO
ATTENUATOR B
(2 Deo eee Spe gs ee ll
ALT
CHOP
Selection for the AL Ternate and the CHOPped
display mode when more channels are selected.
Note: ALT not used in X DEFL
CHOP not used in.COMP, TRIG.
16 | Selection for TRIGger VIEW.
Note: Not active when X DEFL is selected.
INVERT
Switch for inversion of the channel B polarity
and for the addition or subtraction of channel
A and B.
GND
Interruption of channel B input signal, while
the attenuator is connected to earth (ground).
Note: 1. When grounded the trig. mode will
automatically set to auto free-run,
2. When grounded the composite trig.
source will automatically set to
ch. A trig. source,,provided that a
signal is applied to ch. A.
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