HP 3048A Operating Manual page 19

Evaluating When the HP 3048A has completed the noise measurement,
the Results
t n e
graphics softkeys will appear at the bottom of its
display. You will find that these keys access powerful
graphics capabilities to help you with your analysis and
presentation of the measurement results. (Rirther details and
demonstrations of these capabilities are provided in
Chapter 6 of this manual.)
When you look at the measurement results, notice that the
HP 3048A has measured and plotted both the random noise
and deterministic (spurious) signals for the 10 MHz sources.
The HP 3048A differentiates the random noise (which has
been normalized to a 1 Hz bandwidth) from the spurs
(which are not normalized) by using a broken line to plot
the spurs on the graph.
1. Press
Done
to return to the Main Software Level.
H P 3 B 4 B H D E M O : 1 0 MHz " R " v s . 1 0 MHz " B
1
[ h p ] 30+BR C a r r i e r : 10.E+G Hz 2G Jan 199? 1 7 : 5 5 : 0 8 - 1 7 : 5 B : 0 1
- 1 0
- 2 0
- 3 0
- 4 0
- 6 0
- 7 0
- 8 0
- 9 0
- L 0 0
- 1 1 0
- 1 2 0
- 1 3 0
- 1 4 0
- 1 5 0
"T 1 1—I—| 1 1 1—I—T"
10
IBS IK 18K
£ C f ) C d B c / H z D v s f C H z ]
100K
Figure 1-4. Typical Noise Curve for a
10 MHz A versus 10 MHz B Measurement
1-12 Getting Started