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Chapter 3 Demo Waveforms
Demo 1: Voltage-Controlled Oscillator (VCO) Frequency Step Response
and Settling
This menu lets you set various parameters that apply to the computations
performed on the raw timing information from the measurement
hardware. You can see the various choices, as the parameters apply,
for Phase & Frequency Deviation measurement processing in the
HP E1742A/46A/48A or Period, Frequency, TI & Phase in the
HP E1743A/44A. You can see that 1024 measurement samples will be
acquired over a period of 1.024 ms. Note that this implies a sample
interval of 1 µsec (1.024 msec/1024 samples). About 1 msec of the VCO
step will be acquired.
The remainder of this menu is left with default values for this
measurement. No filtering will be applied to the data, a least-square fit
will be used to determine the reference frequency for frequency deviation
measurements (deviation from the reference frequency), pacing will be
determined automatically, and input 1 will be used for measurement data.
Getting Started Guide
3-5
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