Picotest G5100A, Manual

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ramp with 100% symmetry), DRamp (Down or Negative ramp with 0%
symmetry), triangle (ramp with 50% symmetry), noise and arbitrary
waveforms. If an arbitrary waveform is chosen, the number of points in
the waveform is limited to 4k points with an automatic decimation
process. The default frequency for internal modulating waveform is 10Hz,
and the acceptable range is from 2 mHz to 20 kHz.
When external source is selected, the carrier waveform is modulated
with an external waveform present at the
Modulation In
connector on the
rear panel.
Frequency Deviation
The frequency deviation represents the peak variation in the frequency
of the modulation output based on that of the carrier waveform. The
default value is 100 Hz. Each type of carrier waveform has a different
acceptable range as follows:
• Sine: 1 μ Hz to 25.05 MHz(at carrier frequency = 25.05 MHz).
• Square: 1 μ Hz to 12.55 MHz(at carrier frequency = 12.55 MHz).
• Ramp: 1 μ Hz to 150 kHz(at carrier frequency = 150 kHz).
• Arbitrary: 1 μ Hz to 5.05 MHz(at carrier frequency = 5.05MHz).
In addition, the maximum allowable value is constrained by the following
two conditions:
• The frequency deviation must not be greater than the carrier
frequency.
• The sum of frequency deviation and the carrier frequency must
not be greater than the maximum frequency of the selected
carrier waveform plus 100 kHz; that is, 50.1 MHz for sine,
25.1MHz for square, 300 kHz for ramp, and 10.1 MHz for arbitrary
waveforms.
If a value is set greater than one of the above constraints, G5100A will
automatically adjust it to the maximum value allowed.
When external source is selected as the source of modulating waveform,
the modulation is controlled by the specified frequency deviation and the
±5v signal levels of the external waveform. When the external waveform
is at +5v, the output will reach positive maximum frequency deviation;