Agilent Technologies Agilent 33500 Series Operating And Service Manual page 327

VOLTage Subsystem Introduction
Parameter
{OFF|0|ON|1|ONCE}, default ON
Turn voltage autoranging OFF:
VOLT:RANG:AUTO 0
In the default mode, autoranging is enabled and the instrument automatically selects the optimal settings for the
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output waveform generator and attenuator.
With autoranging disabled (OFF), the instrument uses the instrument's current gain and attenuator settings.
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The APPLy command overrides the voltage autorange setting and automatically enables autoranging (ON).
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Disabling autoranging eliminates momentary disruptions caused by attenuator switching while changing ampli-
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tude. However, the amplitude and offset accuracy and resolution (and waveform fidelity) may be adversely
affected when reducing the amplitude below the expected range change.
If a VOLTage:COUPle[:STATe]
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[SOURce[1|2]:]VOLTage:UNIT {VPP|VRMS|DBM}
[SOURce[1|2]:]VOLTage:UNIT?
Selects the units for output amplitude.
Parameter
{VPP|VRMS|DBM}, default VPP
Set output amplitude units to Vrms:
VOLT:UNIT VRMS
Does not affect offset voltage (VOLTage:OFFSet), high level (VOLTage:HIGH) or low level (VOLTage:LOW). They all
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use units of volts.
The instrument uses the current units selection for both front panel and remote interface operations. For exam-
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ple, if you select "VRMS" from the remote interface (VOLTage:UNIT VRMS), the units are displayed as "VRMS" on
the front panel.
Command applies to VOLTage? query results.
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Output units for amplitude cannot be set to dBm if the output termination is set to "high impedance." The units
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are automatically converted to Vpp.
Arbitrary waveform sequences do not accept units of Vrms or dBm.
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Unless you specify the units as part of either the VOLTage command or one of the
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age:UNIT command takes precedence. For example, if you select VOLTage:UNIT VRMS and do not include units
with an APPLy command, the <amplitude> in the APPLy command will be in "Vrms".
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Typical Return
0 (OFF) or 1 (ON)
is ON, changing this setting on either channel changes it on both.
Typical Return
VPP, VRMS, or DBM
APPLy
Agilent 33500 Series Operating and Service Guide
commands, the VOLT-