VOLTage Subsystem Introduction
|Voffset| < Vmax - Vpp/2
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Differences between remote and front panel operation:
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Remote Interface:
Setting the offset from the remote interface can change the amplitude in order to
achieve the desired offset setting. The instrument will generate either a "Data out of range" or "Settings con-
flict" error.
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Front Panel:
Setting the offset from the front panel will not change the amplitude in order to achieve the
desired offset setting. If the specified offset is not valid, the instrument will clip it to the maximum offset
allowed with the current amplitude and generate a "Data out of range" error.
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Limits Due to Output Termination: The offset range depends on the output termination setting. For example, if
you set offset to 100 mVDC and then change output termination from 50 Ω to "high impedance," the offset volt-
age displayed on the front panel doubles to 200 mVDC (no error is generated). If you change from "high imped-
ance" to 50 Ω, the displayed offset voltage will be halved. See
for details. Changing the output
termination setting does not change the voltage present at the output terminals of the instrument. This only
changes the displayed values on the front panel and the values queried from the remote interface. The voltage
present at the instrument's output depends on the load connected to the instrument. See
for
details.
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Limits due to Output Coupling:
If two channels are coupled, limitations of setting offset will be checked on both
channels before a change in offset is executed. If a change in offset would exceed a LIMIT setting, or exceed the
instrument's output specifications for either channel:
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Remote Interface:
First the amplitude and then if necessary, the offset of that channel will be adjusted to
comply with the voltage limits or specification. The instrument will generate either a "Data out of range" or
"Settings conflict" error.
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Front panel:
The offset value is clipped to the maximum value allowed that will not exceed the LIMit setting,
and a "Data out of range" error will be generated.
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Arbitrary Waveform Limitations:
For arbitrary waveforms, amplitude is limited if the waveform data points do not
span the full range of the output DAC (Digital-to-Analog Converter). For example, the built-in "Sinc" waveform
does not use the full range of values between ±1, so its maximum amplitude is limited to 6.087 Vpp (into 50 Ω).
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Changing amplitude may briefly disrupt output at certain voltages due to output attenuator switching. The ampli-
tude is controlled, however, so the output voltage will never exceed the current setting while switching ranges. To
prevent this disruption, disable voltage autoranging using
. The
command auto-
matically enables autoranging.
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Setting the high and low levels also sets the waveform amplitude and offset. For example, if you set the high level
to +2 V and the low level to -3 V, the resulting amplitude is 5 Vpp, with a -500 mV offset.
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To output a DC voltage level, select the DC voltage function (
) and then set the offset voltage (
). Valid values are between ±5 VDC into 50 Ω or ±10 VDC into an open circuit. While the instrument is
in DC mode, setting amplitude has no effect.
[SOURce[1|2]:]VOLTage:RANGe:AUTO {OFF|0|ON|1|ONCE}
[SOURce[1|2]:]VOLTage:RANGe:AUTO?
Disables or enables voltage autoranging for all functions. Selecting ONCE performs an immediate autorange and then
turns autoranging OFF
Agilent 33500 Series Operating and Service Guide
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Содержание Agilent 33500 Series
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