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Chapter 3 Features and Functions
Output Configuration
3
Output Frequency
As shown below, the output frequency range depends on the function
currently selected. The default frequency is 1 kHz for all functions.
• Function Limitations: If you change to a function whose maximum
frequency is less than that of the current function, the frequency is
adjusted to the maximum value for the new function. For example,
if you are currently outputting a 20 MHz sine wave and then change
to the ramp function, the waveform generator will automatically
adjust the output frequency to 200 kHz (the upper limit for ramps and
triangles).
• Burst Limitation: For internally-triggered bursts, the minimum
frequency is 126 Hz.
•
Duty Cycle Limitations
:
For Square and Pulse, Duty Cycle is limited
by the 16-ns minimum pulse width specification. For example, at 1
kHz, Duty Cycle may be adjusted as low as 0.01% because that would
result in a pulse width of 100 ns. However, at 1 MHz the minimum
Duty Cycle is 1.6%, and at 10 MHz it’s 16%. At 30 MHz, Duty Cycle
may only be adjusted from 48% to 52%.
If you change to a frequency that cannot produce the current duty cycle
,
the duty cycle is automatically adjusted in order to meet the
minimum pulse width specification.
Function Minimum Frequency Maximum Frequency
Sine
Square
Ramp/Tri.
Pulse
PRBS
Arb
1 Hz
1 Hz
1 Hz
1 Hz
1 bps
1 Sa/s
30 MHz
30 MHz
200 kHz
30 MHz
50 Mbps
250 MSa/s
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