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Section HI
Figure 3-1
Note:
1, FOCUS:
Controls sharpness of writing beam.
2.
STORE:
Retains displayed signal at reduced
intensity for long time storage.
3.
VIEW:
Intensifies stored display to brightness
'level for viewing.
4.
NORMAL:
Selects operation as standard oscil-
loscope.
5.
WRITE:
Operates CRT
at normal writing rate
with variable persistence.
6.
MAX WRITE:
Operates CRT at maximum
writing rate with variable persistence.
ERASE:
Removes
stored or written displays.
8.
PERSISTENCE:
Controls endurance time of
.
displayed signal.
9.
ASTIGMATISM:
Adjust roundness of writing
beam.
10.
TRACE
ALIGN:
Rotates trace around center
of CRT face.
11.
FIND BEAM:
Returns display to CRT.
12.
INTENSITY:
Controls brightness of display.
13.
POSITION:
Coarse adjustment of display's
horizontal position.
14.
FINE:
Fine adjustment of display's horizontal
position,
l
15.
MAGNIFIER:
Magnifies horizontal display.
16.
PHASE/BANDWIDTH:
Selects between nor-
mal operation (BANDWIDTH) and XY opera-
tion (PHASE).
Located inside on board.
Figure 3-1.
3-2
roo
om
H.
18.
19.
20.
21.
K.
Model 181A/AR
Xo.
0 OCC
HA:
BIA-
A- 11A
Models181A and 181AR differ only in power module location.
Allcontrolsare identical.
See Fig. 1-1.
DISPLAY:
Selects source of horizontal input
signal.
AC/DC:
Selects AC or DC coupling of an ex-
ternal horizontal input signal.
—
EXT INPUT:
BNC connector for coupling an
external horizontal input signal to oscilloscope.
POWER:
Push-button switch with indicator
light for turning oscilloscope on and off.
CALIBRATOR:
Provides a 1~kKHz square
wave signal at 10v pk-pk.
l
REAR PANEL
AC INPUT:
3-wire ac power line input jack,
MAIN GATE OUTPUT:
BNC for connecting
main gate to external equipment,
DELAYED GATE OUTPUT:
BNC for connect-
ing delayed gate to external equipment.
DELAYED SWEEP OUTPUT:
BNC for con-
necting delayed sweep to external equipment.
MAIN SWEEP
OUTPUT:
BNC for connecting
main sweep to external equipment,
Z-AXIS INPUT:
BNC for connecting external
intensification or blanking signal.
FUSE:
AC line fuse for 230vac operation.
FUSE:
AC line fuse for 115vac operation.
LINE SWITCH:
Input power switch for selec-
tion of 115vac or 230vac
operation.
GROUNDING CONNECTOR:
3-way connector
jack for instrument grounding.
Front and Rear
Panel Controls
and Connectors.
02612-2
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