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7
Residual Measurement Fundamentals
Source
E5505a_connect_opt_oscillo
27 Feb 04 rev 1
Figure 153 Connection to optional oscilloscope for determining voltage peaks
Table 30 Acceptable Amplitude Ranges for the Phase Detectors
Phase Detector
50 kHz to 1.6 GHz
Ref Input (L Port)
+
15 dBm
to
+
23 dBm
1 Phase noise test Options 001 and 201.
3
4
Connecting an oscilloscope to the MONITOR port is recommended because the signal can
NO T E
then be viewed to give visual confidence in the signal being measured. As an example,
noise could affect a voltmeter reading, whereas, on the oscilloscope any noise can be
viewed and the signal corrected to minimize the noise before making the reading.
214
Optional line
Power
splitter
Oscilloscope
Signal Input (R Port)
0 dBm
to
+
23 dBm
Adjust the phase difference at the phase detector as prompted by the phase
noise software.
The system will measure the positive and negative peak voltage of the phase
detector using an internal voltmeter. The quadrature meter digital display
can be used to find the peak. The phase may be adjusted either by varying
the frequency of the source or by adjusting a variable phase shifter or line
stretcher.
stretcher
Signal
input
Ref input
Connect scope to monitor output
1.2 to 26.5 GHz
Ref Input (L Port)
+
7 dBm
to
+
10 dBm
Test set
Phase
detector
Low-pass
filter
1
Signal Input (R
Port)
0 dBm
to
+
5 dBm
Agilent E5505A User's Guide
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