Ametek 7230 Instruction Manual page 71

Dsp lock-in amplifier
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Logarithmic
When this radio button is selected, the frequency is defined in terms of a
percentage of the current frequency. For example, if the step size were set to
10%, the start frequency to 1 kHz and the stop frequency to 2 kHz, then the
frequencies generated during the sweep would be:-
1000.000 Hz
1100.000 Hz
1210.000 Hz
1331.000 Hz
1464.100 Hz
1610.510 Hz
1771.561 Hz
1948.717 Hz
2000.000 Hz
Amplitude Sweep group
Start amplitude
This control defines the start amplitude for the amplitude sweep, which may be
set to any value between 0.000 V rms and 5.000V rms with a 1 µV resolution
Stop amplitude
This control defines the stop amplitude for the amplitude sweep, which may be
set to any value between 0.000 V rms and 5.000V rms with a 1 µV resolution
Step size
This control defines the amount by which the oscillator amplitude is changed at
each step. It may be set to any value between 0.000 V rms and 5.000V rms with
a 1 µV resolution.
Armed
If this box is checked then the defined sweep will be run when the Start button is
clicked. If Start Amplitude is greater than Stop Amplitude then the oscillator
amplitude will decrease with time.
Chapter 5, WEB CONTROL PANEL OPERATION
5-29

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