Operating Information—2230 Service
In Peak Detect mode, the minimum and maximum lev
els of the input signal within the time represented by
1/50 of a division unmagnified (1/25 of a division in
CHOP or ALT) are digitized and stored in acquisition
memory as a data pair. The displayed data points are
connected by vectors.
In Sample mode, the signal is sampled at a rate that
produces 100 samples per graticule division. In
RECORD sampling, the displayed sample points are
connected by either vectors or dots. For REPETITIVE
Storage mode, the sample points are displayed as dots.
ACCPEAK—Will cause displays to accumulate. The
largest maximum and smallest minimum sample
acquisitions are retained for each trigger-referenced
sample record over multiple acquisition cycles. When
ACCPEAK is used with hardware peak detection (50 nS
per division to 0.1 s per division), updating of maximum
and minimum samples also occurs within each time-
base clock period. Changing any switch that affects the
acquisition parameters resets ACCPEAK displays.
ACCPEAK mode is valid for triggered acquisitions only
and is not operational in any mode that does not allow
triggers (see Table 2-2).
AVERAGE—Is used for multiple record averaging.
Whenever AVERAGE is selected, SAMPLING is also
selected automatically. When on, a normalized algo
rithm is used for continuous display of the signal at full
amplitude during the averaging process. Averaging is
the default for REPETITIVE Store mode only. The
amplitude resolution increases with the number of
weighted acquisitions included in the display. The
number of weighted acquisitions included in the AVER
AGE display is Menu selectable. The default weight of
AVERAGE mode is 1/4. Other choices are Menu select
able. The number of sweeps (SWP LIMIT) allowed to
occur before averaging stops is also Menu selectable.
REAR PANEL
Refer to Figure 2-9 for location of items 43 through 45.
(4 3 ) EXT Z-AXIS Input Connector—Provides an input
connector allowing external signals to be applied to
the Z-Axis circuit to intensity modulate the NON
STORE waveform display. Applied signals do not
affect the display waveshape. External signals with
fast rise and fall times provide the best defined
intensity modulation. Noticeable intensity modulation
is produced at normal viewing intensity levels by a
5 V p-p signal. The Z-Axis signals must be time-
related to the trigger signal to obtain a stable
intensity-modulation pattern on the displayed
waveform.
(44) Fuse Holder—Contains the ac-power-source fuse.
See the rear panel nomenclature for fuse rating and
line voltage range.
(45) Detachable Power Cord Receptacle— Provides the
v ^ connection point for the ac-power source to the
instrument.
SIDE PANEL
The standard side panel includes one AUXILIARY CON
NECTOR. Refer to Figure 2-10 for the location of item 46.
(46) AUXILIARY CONNECTOR—Provides connections
for an X-Y Plotter and an External Clock input (see
Table 2-4).
NOTE
To meet EMI regulations and specifications, use
the specified shielded cable and metal connector
housing with the housing grounded to the cable
shield for connections to the AUXILIARY CON
NECTOR.
2-19
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