
Graph Type Other than
AM
or Baseband Noise: This parameter specifies the
data type in which the measurement results will be displayed.
• Single-sideband phase noise (dDc/
Hz).
The HP 3048A computes £(/)
as:
ff? ^^
d
f,
and
P
lots
the
results in dBc.
• Phase Modulation Spectral Density {dB/Hz). The HP 3048A computes
S^(f) as: fl
2
Sff,(f) dj, and plots the results in dB with respect to 1
radian (Radians, and Degrees).
• FM Spectral Density (Hz/y/Hz). The HP 3048A computes S
u
(f) as:
if?
S<l>(f)
x
f
2
df, and plots the results in Hz (Residual FM).
• Spectral Density of Fractional Frequency Fluctuations (l/y/Wz). The
HP 3048A computes S
y
(f) as: ff? S^f) X (j-^— f df, and plots
the results without units.
• Noise Figure for 2-Port Devices. The HP 3048A computes the noise
figure (NF) as: S$(f) + 174 + Pin, and plots the results as dB/Hz.
Pin is the input power listed in the Computed Output "Input Power at
Amplifier..." field.
Consideration for Defining the Results Graph
The HP 3048A will complete a measurement even though the ranges
defined for the measurement are incorrect. Graph characteristics can
be changed when the Measurement Results are displayed after the
measurement is complete.
rev.05SEP89
Define Graph 3-21
Commentaires sur ces manuels