Agilent Technologies Agilent 33500 Series, Руководство по эксплуатации и обслуживанию

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VOLTage Subsystem Introduction
Parameter Typical Return
{OFF|0|ON|1|ONCE}, default ON 0 (OFF) or 1 (ON)
Turn voltage autoranging OFF:
VOLT:RANG:AUTO 0
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In the default mode, autoranging is enabled and the instrument automatically selects the optimal settings for the
output waveform generator and attenuator.
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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-
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.
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If a VOLTage:COUPle[:STATe] is ON, changing this setting on either channel changes it on both.
[SOURce[1|2]:]VOLTage:UNIT {VPP|VRMS|DBM}
[SOURce[1|2]:]VOLTage:UNIT?
Selects the units for output amplitude.
Parameter Typical Return
{VPP|VRMS|DBM}, default VPP VPP, VRMS, or DBM
Set output amplitude units to Vrms:
VOLT:UNIT VRMS
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Does not affect offset voltage (VOLTage:OFFSet), high level ( VOLTage:HIGH ) or low level ( VOLTage:LOW ). They all
use units of volts.
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The instrument uses the current units selection for both front panel and remote interface operations. For exam-
ple, if you select "VRMS" from the remote interface (VOLTage:UNIT VRMS), the units are displayed as "VRMS" on
the front panel.
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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
are automatically converted to Vpp.
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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 APPLy commands, the VOLT-
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".
326 Agilent 33500 Series Operating and Service Guide