Tektronix 549 Instruction Manual page 13

Operating Instructions— Type 549
F i g . 2 -1 . R e a r p e n a l c o n tr o ls a n d c o n n e c t o r s .
POW ER. Toggle switch for applying or removing power
to the instrument.
IN T E N S IT Y , Controls w riting gun beam current.
FOCUS.
Used in conjunction with
ASTIGMATISM for obtaining a
controls
A STIG M A TISM . Used in conjunction with the IN T E N S IT Y
and FOCUS controls to obtain o well-defined display.
TRAC E R O TA TIO N . Permits horizontal alignment of the
trace to the horizontal lines of the graticule.
SCALE ILLUM . Varies illumination of the grid lines of the
graticule.
EXT HO R IZ IN . Connector to apply external Horizontal
signal when the H O R IZ O N TA L D ISPLAY switch is set to
either I x or 1 0 x EX T position.
TRIG G ER IN P U T [Time Base A and B]. Connector for
applying an externa! trigger signal to the time base when
the respective TR IG G ER IN G SOURC E switch is set to the
EX T position.
D LY'D TRIG . Supplies a positive-going trigger output of
about 7 volts at the end of the delay period as set by the
TIM E/C M A N D DELAY TIM E switch and the DELAY TIM E
M ULTIPLIER 1:10 dial,
+ G A T E B. Supplies on approximate 20 to 40-volt square-
wave output pulse when Time Base B is operating.
duration is same as the B sweep length.
2-4
IA J U p p e r p o rtio n o f b a c k p a n e l.
Time Base A.
amplitude is about + 1 5 0 volts.
the IN T E N S IT Y and
well-defined display.
amplitude is approximately 1.5 volts/cm of vertical deflec­
tion.
between-channel
B LA N K IN G positions] when using multi channel plug-in units
in the chopped mode. The CRT C A THO D E SELECTOR switch
should be in the NORM position except when using the
chopped mode.
CRT GRID connector in the EXT position or the unblanking
signal from the time base in the N O RM position, for Z ozis
modulation to the CRT grid.
CRT grid (DC coupled) when the CRT GRID SELECTOR switch
is in the EX T position.
with the switch in the EX T position-
of the CRT cathode (AC coupled).
is provided for normal operation.
Pulse
the single sweep reset functions, erasure of each target and
( B ) L o w e r p o rtio n o f b a c k p a n e l.
+ G A T E A. Same as + G A TE B except that it applies ro
SW EEP A. The sweep ramp voltage of Time Base A. Peak
V ERT SlG O U T. Vertical signal output connector. Output
CRT C ATHO DE SELECTOR. Provides
switching transients
CRT GRID SELECTOR. Provides selection between the EXT
EXT CRT GRID. Connector allows Z-a xis modulation of the
Normal trace blanking is removed
EX T CRT C A THO DE. Connector allows Z-a xis modulation
REM O TE C O N TRO L IN P U T. Provides remote operation of
blanking o f the
(in the CHOPPED
A grounding BNC cap