7-18
Section 7: Model 9100: Specifications
Final Width = 215mm
7.11 % Duty Cycle Function Specifications
7.11.1 Introduction
Duty Cycle is a derived (relative) quantity which describes the Pulse Width / Repetition Period ratio of a pulsed waveform. In the
9100, it is expressed as a percentage. The values of Pulse Width and Repetition Period will change with frequency, while
maintaining the same percentage ratio.
Hardware limitations drive the % Duty Cycle to a limit only when the Pulse Width and Repetition Period intervals reach their
individual limits at particular frequencies. This means that any accuracy specification must be expressed in terms of constituent
time intervals.
7.11.2 '% Duty' Value: Screen Setting Limits
00.05%
≤
% Duty
≤
99.95%
7.11.3 Repetition Period Interval Accuracy
Output
Interval
Accuracy
Option 100 Accuracy
Voltage
±
(ppm of Output)
±
(ppm of Output)
1Year — Tcal
±
5
°
C
[1]
5Year — Tcal
±
5
°
C
[1]
Vo
≤
6Vpk
100
µ
s to 2000ms
25
0.25
6Vpk < Vo
≤
30Vpk
1ms to 2000ms
25
0.25
7.11.4 Duty Cycle Accuracy
Output Voltage
Total Accuracy
1Year — Tcal
±
5
°
C
[1]
Vo
≤
6Vpk 50ns
6Vpk < Vo
≤
30Vpk ‡
250ns
7.11.5 High and Low Voltage Limits and Voltage Accuracy
Output
Accuracy
Voltage Vo
(
±
Volts)
1Year — Tcal
±
5
°
C
[1]
Vo
≤
6Vpk
0.06V †
6Vpk < Vo
≤
30Vpk
0.3V
Fig. 7.11.1 % Duty Cycle Function —
Generalized Output Waveshape Definition
‡ = Minimum Mark or Space interval: 10
µ
s.
NOTES: [1]
Tcal = temperature at calibration. Factory calibration temperature = 23
°
C.
† = After first 150ns.
Pulse Width
('Mark')
Repetition Period
Repetition Rate = 1/Repetition Period
High Level
Low Level
'Space'
% Duty Cycle =
Pulse Width
Repetition Period
x 100 %