167
(5 volts for a 50
Ω
load or 10 volts for a high-impedance load). The function
generator will take the new specified output amplitude, but the offset voltage
may be reduced accordingly, and a “Settings conflict” error is generated.
z
When the Output Termination Setting is changed, the offset limits are
automatically adjusted. For instance, when you change the output
termination from 50 ohms to “high impedance”, your offset voltage
doubles, thus it affects your output amplitude, and when Output
Termination has been changed from “high impedance” to 50 ohms, the
offset voltage decreases in half.
z
For arbitrary waveforms, if the waveform data points do not span the full
range of output DAC (Digital-to-Analog Converter), the maximum offset
and amplitude will be limited.
z
Setting a high level and low level is another way to specify the offset. For
instance, you will have an amplitude of 5 Vpp (with an associated offset
voltage of -500 mV) when you set your high level to +2 Vpp and low level
to -3 Vpp.
VOLTage:OFFSet? [MINimum
︱
MAXimum]
Query the dc offset voltage for the current function.
VOLTage:HIGH {<voltage>
︱
MINimum
︱
MAXimum}
Specify the high voltage level. The default high level for all functions is +50 mV.
The minimum value is the most negative voltage level and the maximum value
is the largest voltage level for the chosen function.
z
The high and low voltage level must conform the following restriction:
Vhigh – Vlow
≤
Vpp (max) and Vhigh, Vlow
≤
Vpp (max)/2
Where Vpp (max) is the maximum peak-to-peak amplitude for the chosen
output termination (10 Vpp for a 50-ohm load or 20 Vpp for a high-impedance
load). If you specify an invalid voltage level, the waveform generator will adjust
it automatically to the highest allowed value and “Data out of range” error is
generated.
z
The high voltage level should always be greater than the low level. If not,
a “Setting conflict” error is generated and the waveform generator
automatically set the high level to 1 mV larger than the specified low level.
z
specifying a high level and low level also sets the offset. For instance, you
Summary of Contents for G5100A
Page 5: ...5 D APPLICATION PROGRAMS 173 ...
Page 71: ...71 Schematic of Receiver ...
