81150A, only: The output of the high bandwidth amplifier may optionally be
amplified by the low bandwidth amplifier to achieve higher output voltages
(amplifier gain of 2). 81150A, only: When enabling the low bandwidth path,
the available output voltage range doubles. But, the maximum output
frequency, as well as the other pulse parameters (like transition times and
width) are limited to 50 MHz.
When changing ranges, the 81150A and the 81160A switches attenuators
such that the output voltage never exceeds the current amplitude setting.
However, momentary disruptions or "glitches" caused by switching can
cause problems in some applications. For this reason, the 81150A and the
81160A incorporates a range hold feature to "freeze" the attenuator and
amplifier switches in their current states. However, the amplitude and offset
accuracy and resolution (as well as waveform fidelity) may be adversely
affected when reducing the amplitude below the expected range change.
81150A: As shown below, the 81150A has a selectable series output
impedance of 50 or 5 , forming a voltage divider with the load
resistance.
81160A: The 81160A has a series output impedance of 50 fix, forming a
voltage divider with the load resistance.
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