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saturate the amplifier's output stage causing an increased
dead zone and decreased pen speed. Pen oscillation may
also result if the noise "beats" with the servo system's carrier
frequency. A built-in low pass filter in both axes minimizes the
effects of normal mode noise. The response of this filter is
illustrated in Figure 1-7.
FIGURE 1-6. INPUT RESISTANCE CHARACTERISTICS
1-34. DYNAMIC RESPONSE
1-35. Figure 1-8 indicates the typical frequency response for a
sinusoidal input. Although the recorder is designed to record
slowly varying dc voltages, ac voltages up to a few Hz can be
recorded.
1-5
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Troubleshooting
