Commands Listed in Alphabetical Order
Conditions
MDO3000 series
with option MDO3AFG installed and MDO4000C series with
option MDO4AFG installed only.
Group
AFG
Syntax
AFG:LEVELPreset {CMOS_5_0V|CMOS_3_3V|CMOS_2_5V| ECL|TTL|USER}
AFG:LEVELPreset?
Arguments
CMOS_5_0V – standard 5-volt CMOS levels. Not available when the load
impedance is 50 Ohm.
CMOS_3_3V – standard 3.3-volt CMOS levels
CMOS_2_5V – standard 2.5-volt CMOS levels
USER–user-defined.
ECL – -1.7 to -0.9 volts (note the full range is not available in 50 Ohm – actual is
-1.65 to -0.85. See table below.
TTL – 5.0 volts. Not available when the load impedance is 50 Ohm.
Note: The TTL standard power supply is 5V. Since the Typical standard is >2.6V
for high, this is unachievable in 50 Ohm mode. See table below.
Returns
Once any of the vertical settings are changed from the preset values, or the output
load impedance is changed, the query form returns
USER.
Examples
AFG:LEVELPRESET CMOS_3_3V sets the AFG preset levels to standard 3.3 volt
CMOS levels for the AMPLitude, OFFSet, HIGHLevel and LOWLevel settings.
AFG:LOWLevel
This command sets (or queries) the low level value of the output waveform, in
volts, when using the arbitrary function generator feature. The low level value
is constrained by the requirements for amplitude and offset; updating thisvalue
changes the amplitude and offset values.
To set or query the amplitude or offset values, use the commands AFG:AMPLitude
and AFG:OFFSet.
NOTE. The AFG:OUTPut:LOAd:IMPEDance command must b e used before
using any of the amplitude/offset/highLevel/lowLevel/Preset commands, so that
saved setups are recalled with the proper load factor applied.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-135
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