Operating instructions

7B50A (070-1986-00)
7B80 (070-1959-00)
7B85 (070-1961-00)
MANUALCHANGE
INFORMATION
T E KT R O
NIX0

PRODUCT
7B50A,7B80 & 7B85

CHANGEREFERENCE

C4/978
committed to
technical excellence

DATE

9-29-78
CHANGE : I

DESCRIPTION
TEXT CORRECTIONS
ADD new Step A4
as follows :
Page 5-5 (7B50A
& 7B80)

Page 5-6 (7B85)
A4 . ADJUST
TRIGGERINGSENSITIVITY (R49)
a . Set
the TRIGGERING LEVEL control to 0 . Set the
TRIGGERING
MODE to
NORM, SOURCE to INT .
b . Set the
amplifier unit deflection factor to 50 millivolts/
division
. Set the low-frequency sine-wave generator for a
5-division
display (250 millivolts) at 1 kilohertz .
c . Set
the amplifier unit deflection factor to 1 volt/division
(0 .25 division) . Set
the TRIGGERING LEVEL control for a stable
display .
d . ADJUST - R49,
Trigger Sensitivity, for a stable crt display .
e . Set the
amplifier unit deflection factor to 2 volts/division
(0 .125
division) . Set the TRIGGERING LEVEL control for a stable
display (stable
display may not be possible) .
f . ADJUST - R49, Trigger
Sensitivity, to a setting that provides
a visible trace, but the
display remains unstable .
g . Repeat part c of this
step .
h . Set the amplifier unit deflection factor
to 5 volts/division
(0 .05 division) .
i . CHECK - Rotate the TRIGGERING
LEVEL control throughout
its
range and check for no trace
(one displayed sweep will
occur
when control passes the
midrange point) .
RENUMBER : Step A4 to A5
A5 to A6
A6 to A7
A7 to A8
PAGE 1 OF
1