Chapter 4 185
Key Function Descriptions
Key Function Tables
dBµV AMPLITUDE Selects absolute decibels relative to 1 µV as the
amplitude units.
dBmV AMPLITUDE Selects absolute decibels relative to 1 mV as the
amplitude units.
FREQ OFFSET FREQUENCY Adds an offset value to displayed frequency values,
including marker frequency values. The range of the
sweep (that is, the span) is not affected. When this
function is active an F appears on the left edge of the
display.
FREQUENCY — Activates the center frequency (or the start frequency)
and accesses a menu of frequency functions.
FULL SPAN SPAN Sets the spectrum analyzer span to its maximum
frequency range.
HOLD — Holds the active function to its present value, blanks the
softkeys and active function area from the display, and
expands the remaining graticule and annotation.
LAST SPAN SPAN Sets the spectrum analyzer to the previously selected
span.
LINEAR AMPLITUDE Selects the linear amplitude scale.
LOG dB/DIV AMPLITUDE Selects a 1, 2, 5, or 10 dB logarithmic amplitude scale.
MAX MXR LEVEL AMPLITUDE Selects the maximummixer level seen at the input mixer
for signals at or below the reference level.
NORM REF LVL AMPLITUDE Activates the normalized reference level, permitting an
offset to be introduced to the displayed trace.
NORM REF POSN AMPLITUDE Adjusts the normalized reference position.
PRESEL AUTO PK AMPLITUDE Automatically peaks the preselector for the desired
signal on a trace.
PRESEL MAN ADJ AMPLITUDE Permits manual adjustment of the preselector. Peak the
preselector using the data keys, the step keys, or the
knob.
RANGE LVL AMPLITUDE Activates the dynamic range level function and ensures
the displayed range is compression free.
REF LVL AMPLITUDE Activates the reference level function.
REF LVL OFFSET AMPLITUDE Introduces an offset to all amplitude readouts, but does
not change the position of the on-screen trace. When this
function is active, an R appears on the left side of the
display.
Table 4-1 Fundamental Functions
Function Keys Access Key Description
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