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Voltage Controlled Source Tuning Requirements
Document Part No. E5500-90024Ed. 1.0
Peak Tuning Range (PTR) ≈ Tune Range of VCO x VCO Tune
Constant.
Min. PTR =.1 Hz
Max. PTR = Up to (200 MHz depending on analyzer and phase
detector LPF).
Drift Tracking Range = Allowable Drift During Measurement
The tuning range that the software actually uses to maintain
quadrature is limited to a fraction of the peak tuning range (PTR) to
ensure the tuning slope is well behaved and the VCO Tune Constant
remains accurate. After phase lock is established, the test system
monitors the tuning voltage required to maintain lock. If the tuning
voltage exceeds 5% of the PTR during the measurement, the test
system again informs the user and requests the oscillator be retuned
or the problem be otherwise corrected before proceeding with the
measurement. These limits have been found to guarantee good
results. Refer to
Figure
Figure 17-7
E5500 Phase Noise Measurement System Version A.02.00
Reference Graphs and Tables
Voltage Controlled Source Tuning Requirements
17-7.
17
17-9
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