A djustm ent P roced u re —2 2 4 6 1Y and 2 2 4 6 M O D A Service
HORIZONTAL
Equipm ent R equired (S ee Table 4 -1 ):
Time-Mark Generator
50 G Coaxial Cable
Calibration Generator
50 n Termination
See the
A D JU S T M E N T LO C A TIO N S
section
at the back of this manual for locations of test points and adjustments.
INITIAL CONTROL SETTINGS
Set:
Vertical MODE
CH 1 and CH 2
INPUT COUPLING
DC
VOLTS/DIV
0.1 V
Vertical POSITION
Controls
12 o ’clock
Horizontal MODE
A
A/B SELECT
A
SEC/DIV
0.1 ms
Trigger LEVEL
12 o ’clock
HOLDOFF
min (CCW)
SLOPE
- T
Trigger MODE
AUTO LEVEL
Trigger SOURCE
VERT
Trigger COUPLING
DC
MEASUREMENTS
OFF
MENU Displays
OFF
A INTEN
10 o ’clock
READOUT
12 o ’clock
FOCUS
for well defined
SCALE ILLUM
display
fully CCW
PROCEDURE
1. H orizontal X I Gain (Tim ing) (R 8 26 )
a. Set:
Vertical MODE
CH 1 (CH 2 off)
CH 1 VOLTS/DIV
0.5 V
b. Connect time mark generator to CH 1 input via 50 f i
BNC coaxial cable and 50
D,
BNC termination. Set
generator for 0.1 ms time marks.
c. Position peaks of the time markers to the center hori
zontal graticule line.
d. ADJUST-HORIZONTAL IX GAIN (R826) for one
time mark per division over the center 8 divisions.
2. H orizontal X I 0 Gain (Tim ing) (R 8 25 )
a. Set X I0 MAG to ON.
b. Set time mark generator for 10
jj
.
s
time marks.
c. Position display about center screen.
d. ADJUST-HORIZONTAL X I0 GAIN (R825) for one
time mark per division over the center 8 divisions.
3. R eadout H orizontal Gain (R 8 23 ) and M AG
Registration (R 8 09 )
a. Set the time mark generator for 0.5 ms time marks.
b. Position the middle time marker to the center vertical
graticule line using the Horizontal POSITION con
trol.
c. Set X I0 MAG to Off.
d. ADJUST-MAG REG (R809) to position the middle
time marker to the center vertical graticule line.
e. Set X I0 MAG to On.
f.
CHECK—for no horizontal shift in the time marker.
g. Repeat parts b through f until no shift is noted.
5-12
REV JUN 1991
Содержание 2246 1Y
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