Tektronix 2230, Service Manual

Page: 31 / 483

Operating Information— 2230 Service
CONTROLS, CONNECTORS,
AND INDICATORS
The following descriptions are intended to familiarize
the operator with the location and function of the
instrument’s controls, connectors, and indicators.
POWER AND DISPLAY
Refer to Figure 2-4 for location of items 1 through 9.
( 7 ) Internal Graticule— Eliminates parallax viewing error
between the trace and the graticule lines. Rise-time
amplitude and measurement points are indicated at
the left edge of the graticule.
(
2
) POWER Switch—Turns instrument power on or off.
Press in for ON; press again for OFF.
( 7 ) Power On Indicator— Lights up while instrument is
operating.
FOCUS Control— Adjusts for optimum display
definition. Once set, proper focusing is maintained
over a wide range of display intensity.
@ STORAGE/READOUT INTENSITY Control— Adjusts
the brightness of the STORE mode displayed
waveforms and the readout intensity in both STORE
and NON STORE mode. The fully counterclockwise
position of the control toggles the STORE/NON
STORE readout on and off.
( T ) BEAM FIND Switch—Compresses the vertical and
horizontal deflection to within the graticule area and
intensifies the display to aid in locating traces that
are overscanned or deflected outside of the crt view­
ing area.
(
7
^ TRACE ROTATION Control— Permits alignment of
the trace with the horizontal graticule line. This con­
trol is a screwdriver adjustment that, once set,
should
require little attention during normal
operation.
^ 8 ^ A INTENSITY Control— Adjusts the brightness of all
^ NON STORE displayed waveforms. The control has
no effect on the STORE mode displays or the crt
readouts.
B INTENSITY Control— Adjusts the brightness of
' ' the NON STORE B Delayed Sweep and the
Intensified zone on the A Sweep. The control has no
effect on STORE mode displays or crt readouts.
VERTICAL
Refer to Figure 2-5 for location of items 10 through 19.
VOLTS/DIV Switches— Select the vertical channel
deflection factors from 2 mV to 5 V per division in a
1-2-5 sequence. The VOLTS/DIV switch setting for
both channels is displayed in the crt readout. The
VOLTS/DIV control settings for displayed waveforms
containing cursor symbols are shown in the crt
readout.
In STORE mode, SAVE waveforms and waveforms
waiting to be updated between trigger events may
be vertically expanded or compressed by up to a
factor of 10 times (or as many VOLTS/DIV switch
positions remaining— whichever is less) by switching
the corresponding VOLTS/DIV control (waveforms
acquired at 2 mV/div cannot be expanded and
waveforms
acquired at 5 V/div cannot be
compressed). The VOLTS/DIV readout reflects the
vertical scale factor of the displayed waveform. If the
VOLTS/DIV switch is switched beyond the available
expansion or compression range, the readout is
tilted to indicate that the VOLTS/DIV switch setting
and the VOLTS/DIV readout no longer agree.
IX PROBE— Front-panel marking that indicates
the deflection factor set by the VOLTS/DIV switch
when a XI probe or a coaxial cable is attached to
the channel input connector.
10X PROBE— Front-panel marking that indicates
the deflection factor set by the VOLTS/DIV switch
when a properly coded 10X probe is attached to
the channel input connector.
2-4