User`s guide

Agilent Technologies E5500 Phase Noise Measurement System 12-17
AM Noise Measurement Fundamentals
Method 3: Single-Sided-Spur
Method 3: Single-Sided-Spur
Advantages
• Will measure source without modulation capability.
• Calibration is done under actual measurement conditions so all
non-linearities and harmonics of the AM detector are calibrated out. The
double-sided spur method and the single-sided-spur method are the two
most accurate methods for this reason.
Disadvantages
• Requires 2 RF sources, which must be between 10 Hz and 40 MHz apart
in frequency.
• Requires an RF spectrum analyzer for manual measurement of the
signal-to-spur ratio and spur offset.
Procedure
1. Connect circuit as shown in Figure 12-6, and tighten all connections. If
the Agilent/HP 70420A Option 001 or Agilent/HP 70427A is available,
use one of the connection diagrams described in “AM Noise
Measurement Block Diagrams” on page 12-3.
Figure 12-18 AM Noise Measurement Setup Using Single-Sided-Spur
2. Measure the power which will be applied to the AM detector. It must be
between0and+23dBm.