Trace Alignment Ad Justment; Beam Finder; Readout (Wor Ks Only Wit H 5400-Series Plug-In U Nits); Display Switc H Ing L Ogic - Tektronix 5440 Instruction Manual

Operati
n
g I
n
formation-5440
Trace Alignment Ad justment dis
p
laye
d
withi n t he to p d ivisio n of th e gratic u le and th e
If α free-run n ing trace is not
p
arallel with
t
h e
h
orizontal
rea
d
out from Chann el 2 is dis
p
layed directly below with in
gratic u le lines, set the Trace
R
otation ad j ustme nt (internal
the bottom division of the graticule . Only th e readout from
p
lug-in ch annels that are selecte
d
by dis p lay switches, or
ad justment) as follows: Positio n th e trace to th e ce nter
by
t
h e mode switc hes of dual-c hannel
p
lug-i ns, ap pear in
horizontal li ne an d ad just the Trace
R
otation adj ustment
th e readout display .
so th at th e trace is parallel with
t
h e
h
orizontal graticule
lines.
B
eam
F
inder
Th e BEAM FI N DER switch provides α means of
locating α d is play that overscans the viewi ng area either
vertically or horizontally . Wh en t
he BEAM FI NDER switc h
is p ressed , the display is com
p
resse
d
within the graticule
area and the display intensity is i n creased . To locate and
re position an overscann ed
d
is
p
lay, use t h e following
proced ure :
1 . Press the BEAM FI N D ER switch ,
h
ol
d
it in, then
increase th e vertical and horizo ntal deflectio n factors until
the
d
isplay is with i n
t
he graticule area .
2 . Ad j ust the vertical an d horizontal position controls
to ce n ter the
d
is play about the vertical and horizontal
centerlines .
3 .
R
elease th e BEAM F I N DER switch ; the
d
isplay
should remain with in the viewing area .
Readout (Wor ks Only Wit h 5400-Series Plug-in
U
nits)
Th e rea
d
out system of the power su
pp
ly/amplifier and
d
isplay mo dules allows alp hanumeric
d
is p lay of informa-
tion on the crt, alo n g with
t
h e a nalog waveform displays .
The information disp laye d by the rea
d
out system is
obtained from th e plug-in units that are installe
d
in th e
p
lug-in compartments . The characters of t h e readout
display are written by the crt beam on α time-s h ared basis
with
t
h e signal waveforms.
The
R
eadout System operates i n α free-r u n ning mo de
to in terrupt the waveform
d
is play to
p
resent c h aracters .
The waveform
d
is p lay is interru
p
ted for only about 20
microseconds for each
c
haracter th at is
d
is p laye
d
.
Th e readout information fro m eac h p lug-in is called α
word .
U p to six (eig ht wit h Op tion 3) words of rea
d
out
information can be
d
is played . The location at whic h each
readout word is p resented is fixed an
d
is
d irectly relate
d
to
the plug-i n
u
n it an
d
ch annel from wh ic h it originated . Fig .
1-2 s hows the area of the g raticu le where th e readout from
eac h plug-i n unit chann el is dis playe d (external readout
programmi n g is available only with
Op
tion 3) . Notice that
the readout from C
h
an nel 1 of each p lug-in un it is
T h e RE ADOU T I NT EN S control determines t he i nten-
sity of only the
r
ea
d
out portio n of the display i nd ependent
of the ot her traces . The readout system is i no
p
erative in
t h e fully counterclockwise OFF p ositio n Th is may be
desirable when the to
p
and bottom divisions of the
graticule are to be use
d
for waveform dis
p
lay, or when the
trace interruptions necessary to
d
is p lay characters do not
allow α satisfactory waveform display to be obtaine
d
.
O
p
tion 3,
E
xter nally
P
rogrammed Sevent h and
E
ig h th R eadout Wor
d
s
Th is o ption a
d
ds α 25-p in connectorto the rear-
p
anel of
t h e 5440 t h roug h wh ic h two ten-character readout words
ca n be dis
p
laye d on the crt, see Fig . 1-2 .
Display Switc h ing
L
ogic
Th e electro n ic switc h i ng for time-s h ared d isplays is
p
roduced at the plug-i n in terface with in th e main frame;
h
owever, the switch ing logic is selected
i
n
t
he
p
lug-in
units . The system allows any combin ation of
p
lug-i ns a n d
Dis
p
lay switc h setti n gs .
R
efer to the indivi
d
ual plug-in
ma n uals for specific capabilities an
d
operati n g
procedures .
Left
R
ig ht
V
ertical V
ertical
Cha nnel 1 Channel 1
Horizontal
H
orizontal
Α or M ai n Β or Delayed
Left
R
ig ht
E
xter nal
E
xternal
V
ertical V
ertical
W
or
d
W
ord
Channel 2
C
ha nnel 2 (C hannel) 1
(C hann el) 2
E
xter nal readout
informatio n
w
hen
option is installe
d
. 2139-03
Fig . 1-2. Locatio n of readout on th e crt identifying the origi-
nating pl ug-in un it an
d c
han nel (and exte r nal, if Optio n 3 is in-
stalle d).