Chapter 4 227
Key Function Descriptions
Key Descriptions
The counted value appears in the upper right corner of
the display.
Front-panel key access: FREQ COUNT
COUNTER
RES Adjusts the resolution of the frequency-count
measurement. The resolution ranges from 1 Hz to 1
MHz in decade increments. The default value is 10
kHz. The counter measurement occurs over a time
interval of twice the reciprocal of the counter resolution
for resolution bandwidths greater than or equal to 300
Hz.
Front-panel key access:
FREQ COUNT
COUPLING
AC DC Not available with an Agilent 8563E/EC, Agilent
8564E/EC, or Agilent 8565E/EC. Toggles the input
between ac and dc coupling. The preset state of the
analyzer is ac-coupled. This protects the input of the
analyzer from damaging dc signals. It also limits the
lower frequency-range response to 100 kHz (although
the analyzer will tune down to 0 Hz with signal
attenuation).
Front-panel key access:
AMPLITUDE
CRT ADJ
PATTERN Displays a fixed pattern of lines and characters on the
screen, each of which is used in setting the various
adjustments in display hardware (such as vertical gain,
focus, and so on) that are available in E-series
instruments. Three of these adjustments—X POSN, Y
POSN, and TRACE ALIGN—are available from the
rear panel. Use the CRT alignment pattern and the
above three adjustments to align the display. Refer to
Figure 4-3. When this function is active, all front-panel
keys are inactive except
PRESET. Press EXIT to remove
the pattern and return the analyzer to its previous
state. For other display adjustments, refer to the
Chapter 8. EC-series instruments do not require
adjustment and are not adjustable.
Front-panel key access:
CAL
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