Commands Listed in Alphabetical Order
Examples
AFG:HIGHLEVEL
1.0
sets the AFG high level value to 1.0 volts.
AFG:LEVELPreset
Sets (or queries) the AFG preset levels to values that correspond to the logic
standard spe
cified by the argument. The presets set the following vertical controls:
AMPLitude
OFFSet
HIGHLevel
LOWLevel
Note that once any of these vertical settings are changed from the preset values, or
the output load impedance is changed, the query form returns
USER.
NOTE. Specifying a level preset attempts to set the High and Low level values
to valid levels for the selected logic standard. Because some waveforms (e.g.,
LORENtz, SINC, etc.) have limited amplitude/offset ranges, these values may not
be achi
evable. In such cases they are limited to by the maximum levels specified
by the commands AFG:HIGHLevel and AFG:LOWLevel.
NOTE.
The AFG:OUTPut:LOAd:IMPEDance command must be used before
using any of the amplitude/offset/highLevel/lowLevel/Preset commands, so that
saved setups are recalled with the proper load factor applied.
The AFG:LEVELPreset command sets the high level and low level values as
follows:
AFG:HIGHLevel and AFG:LOWLevel Setting Values
Load Impedance
FI
FTY Ohm
Load Impedance
HI
GHZ
LEVEL P reset High Low High Low
TTL
N
/A
N
/A
5.0V 0V
CMOS_5_0V N/A N/A
5.0V 0V
CMOS_3_3V
2.5V 0V 3.3V 0V
CMOS_2_5V
2.5V 0V 2.5V 0V
ECL
-0.85V -1.65V -0.9V -1.7V
2-134 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual