Fluke 9100 - Page 218

4.11-4 Section 4: Using the Model 9100: % Duty Function
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Section 3 Editing Tutorials.
4.11.4.1
'% Duty Cycle' and 'Period Time-Interval';
High and Low Voltage Levels
The Duty Cycle '%' value and Period time-intervals; High Level and Low Level voltage
values can be changed using 'Digit' and 'Direct' edit facilities as described in Section 3.
On the '% Duty Cycle' menu screen (illustrated on page 4.11-2) the high level value is
placed beneath the period time interval value on the left, with the low level on the right.
Default Output Waveshape
The default output is a 100Hz symmetrical rectangular wave (50% duty cycle; i.e. 1:2
mark/period ratio; 1:1 mark/space ratio) with its low level at 0 volts, and its high level
at +5V, as shown below in Fig 4.11.1:
4.11.4 Value Editing
Fig. 4.11.1 % Duty Function —
Default Output Waveshape
Mark
= 5ms
Space
= 5ms
Period = 10ms
Repetition Rate = 100Hz; Duty Cycle = 50%
High Level
= +5V
Low Level
= 0V
High and Low Signal Level Switching
The effect of changing the values, appearing in the High and Low Level positions on the
screen, is to alter the voltages between which the rectangular output waveform switches.
High and Low Signal Level Limits
The high and low signal levels are respectively the most-positive and most-negative
excursions of the output signal, and when the % duty is expressed in absolute values,
cannot be set outside the following limits:
Up to ±6.0V Output:
100.0µs ≤ Period; 0.3µs ≤ High Interval; 0.3µs ≤ Low Interval.
Up to
±30V Output:
1ms ≤ Period; 10µs ≤ High Interval; 10µs ≤ Low Interval.
In addition, the High Level cannot be set equal to or more negative than the Low Level.