User`s guide

212 Agilent E5505A User’s Guide
7 Residual Measurement Fundamentals
Procedure
1 Connect circuit as per Figure 148, and tighten all connections.
2 Measure the power level that will be applied to the signal input of the test
set’s phase detector. Table 29 shows the acceptable amplitude ranges for
the E5505A phase detectors.
3 Locate the power level you measured on the left side of the Phase Detector
Sensitivity Graph (Figure 154 on page 219). Now move across the graph at
the measured level and find the corresponding Phase Detector constant
along the right edge of the graph. This is the value you will enter as the
Current Detector Constant when you define your measurement. (Note that
the approximate measurement noise floor provided by the Signal Input port
level is shown across the bottom of the graph.).
Figure 148 Measuring power at phase detector signal input port
Table 29 Acceptable amplitude ranges for the phase detectors.
Phase Detector
50 kHz to 1.6 GHz 1.2 to 26.5 GHz
1
1 Phase noise test set Options 001 and 201.
Ref Input (L Port) Signal Input (R Port) Ref Input (L Port) Signal Input (R Port)
+15 dBm to +23 dBm 0 dBm to +23 dBm +7 dBm to +10 dBm 0 dBm to +5 dBm
Power
splitter Phase
detector
Source
E5505a_phase_det_signal
27 Feb 04 rev 1
Optional line
stretcher
Power meter
or
spectrum
analyzer
Test set
Signal
input
Ref input