Table of Contents
Advertisement
Measured +/- DC
Peak Voltage
Table 8-2
Acceptable Amplitude Ranges for the Phase Detectors
50 kHz to 1.6 GHz
Document Part No. E5500-90024Ed. 1.0
Advantages:
G
Easy method for calibrating the measurement system.
G
This calibration technique can be performed using the baseband
analyzer.
G
Fastest method of calibration. If, for example, the same power
levels are always at the phase detector, as in the case of leveled,
or limited outputs, the phase detector sensitivity will always be
essentially equivalent (within one or two dB). Recalibration
becomes unnecessary if this accuracy is adequate.
G
Only one RF source is required.
G
Measures the phase detector gain in the actual measurement
configuration. This technique requires you to adjust off of
quadrature to both the positive and the negative peak output of
the Phase Detector. This is done by either adjusting the phase
shifter or the frequency of the source. An oscilloscope or
voltmeter can optionally be used for setting the positive and
negative peaks.
Disadvantages:
G
Has only moderate accuracy compared to the other calibration
methods.
G
Does not take into account the amount of phase detector
harmonic distortion relative to the measured phase detector
gain, hence the phase detector must operate in its linear region.
G
Requires manual adjustments to the source and/or phase shifter
to find the phase detector's positive and negative output peaks.
The system will read the value of the positive and negative peak
and automatically calculate the mean of the peak voltages which
is the phase detector constant used by the system.
Procedure
1
Connect circuit as per
2
Measure the power level that will be applied to the Signal Input
port of the Agilent 70420A's Phase Detector.
acceptable amplitude ranges for the Agilent 70420A Phase
Detectors.
Phase Detector
E5500 Phase Noise Measurement System Version A.02.00
Residual Measurement Fundamentals
Figure
8-10, and tighten all connections.
*
1.2 to 26.5 GHz
8
Calibration Options
Table 8-2
shows the
8-13
Advertisement
Table of Contents
