Tektronix 7844, Инструкция по эксплуатации

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Operating I nstructions-7844/R7844 Operators
9. Rotate the G R AT I L L U M control throughout its range
and notice that the graticul e l ines are i l l uminated as the
control is turned clockwise. Set the G RAT I L LUM control
so that the graticul(� l ines are i l l um i nated as desired.
1 0. Set the deflection factor of the right vertical unit to
1 0 mill ivolts/division, Notice that the square-wave d isplay
is not completely visible since the deflection exceeds the
scan area of the crt,
1 1 . Press the B EAM 2 B E AM F I N D E R push button. No­
tice that the display is returned to the viewing area, in a
compressed and defocused form, Release the BEAM F I N D­
E R switch and notice that the display again disappears from
the viewi n9 area.
1 2. With the BEAM 2 BEAM F I N D E R switch depressed,
increase the deflection factor of the right vertical unit un­
til the display is reduced to less than 2 divisions vertically.
Adjust the right vertical unit position control to center the
compressed display about the center of the graticule. Re­
lease the B EAM F I N D E R and notice that the d i splay re­
mains within the viewing area. Repeat steps 1 0, 1 1 , and
1 2 for BEAM 1 and the left vertical unit.
13. Turn the R EADOUT I NTENSITY control clockwise
(out of detent) until the alphanumeric display is visible
near the top and/or bottom of the graticule. Change the
deflection factor of the amplifier plug-in units. Notice
that the readout display corresponds to the deflection fac­
tor selected. Li kewise, change the sweep rate of the time­
base units, located in the A H O R I Z and B H O R I Z com­
partments. Notice that the readout display for the time­
base units corresponds to the sweep rate selected. If an
ampl'lfier unit w'lth
lOX
probe encod'lng is used, install a
l O X probe on the input connector. Notice that the de­
flection factor indicated by the readout is increased by
1 0 times when the probe is added. If any of the plug-in
units is a dual unit, notice that the readout can appear
within the upper or lower graticule division. Also, note
that the readout for each plug-in unit is allocated to a
specific location on the graticule.
Set each time·base u n it for magnified sweep operation ( i f
t i m e base unit is equipped with a sweep magnifier). No­
tice that the readout display changes to i ndicate the
correct magnified sweep rate. Return the time-base unit
to normal sweep operation and disconnect the lOX probe.
1-8
Vertical System and Calibrator
Set-up status:
POWE R switch
On
C A L I B RATOR ( 1 kHzl
R EADOUT I NTENSITY
EXT/BEAM 2 GATED
G RAT I L LUM
EXT/BEAM 2 GATED
A T R I G SD U R C E
B T R I G SOU R CE
BEAM 1
I NTENSITY
FOCUS
V E RTICAL MODE
B EAM F I N D E R
H O R I ZONTAL MD D E
H O R I Z SEP ( 1 )
B EAM 2
I NTENSITY
FOCUS
V E RT I CAL MODE
BEAM F I N D E R
4 V push button i n
As desired (out of
P U L S E D switch de­
tentl
BEAM 2 GATED
(push button outl
As desi red (out of
P U L S E D switch de­
tentl
BEAM 2 GATED
(push button outl
L E F T
R I G HT
As desired
As desired
L E F T
Push button out
A
Midrange
As desired
As desired
R I GHT
Push button out
H O R I ZONTAL MODE B
Set-up status for the associated equipment:
Left Vertical Unit Deflection factor, 1 volt!
division ; position, cen­
tered in the top half of
the graticu!e; input
coupling, dc.
@