Keysight Technologies N9321C, User Manual

Page: 113 / 220

105
Key Reference
Amplitude
Scale Type
Log Lin
Scales the vertical graticule divisions in logarithmic units when
Log
is selected. The valid logarithmic units are 1, 2, 5 and 10 dB per
division. When
Lin
is underlined, the vertical divisions are linearly
scaled with default amplitude units of volts. The top of the
graticule represents the reference-level value; the bottom of the
graticule represents zero volts. (Each division is one-tenth of the
reference level.)
Key access:
Amplitude > Scale Type
Y Axis Unit
Accesses the softkeys that change the amplitude units (logarithmic
or linear). Change the amplitude units by pressing
dBm , dBmV ,
dBuV , dBuA, Watts , Volts ,
and
Amps
.
Key access:
Amplitude > Y Axis Unit
Hi-Sensitivity
Set this softkey to
On
to set 0 dB attenuation, -50 dBm reference
level and turn the preamplifier on. It’s very helpful to observe the
low-level signals with this settings.
Key access:
Amplitude > More > Hi-Sensitivity
Ref Offset
Adds an offset value which ranges from -327.6 dB to +327.6 dB, to
the displayed reference level. Reference-level offsets are only
entered by using the numeric keypad. Entering an offset does not
affect the trace or the attenuation value. Reference-level offsets
are used when gain or loss occurs between a device under test and
the analyzer input. Thus, the signal level measured by the analyzer
may be referred to as the level at the input of an external
amplitude-conversion device. When an amplitude offset is entered,
its value appears on the left side of the display under
Offst
(as
opposed to frequency offsets which appear at the bottom of the
display). To eliminate an offset, press
Ref Offset > 0 > dB
.
Key access:
Amplitude > More > Rel Offset