Appendix
104
3.2.3 Output Amplitude
The default amplitude is 1 Vpp (into 50 ohms) for all functions.
Offset Voltage
Limitations
The relationship between output amplitude and offset voltage is shown
below. Vmax is the maximum peak voltage for the selected output
termination (5 volts for a 50 load or 10 volts for a high-impedance load).
Vpp = Vmax – Vmin
Or
Vpp = 2 * |Vmax – Voffset|
Limits due to
Output Termination
If you change the output termination setting, the values do not get adjusted
and an error message indicates potential problems with level settings.
But, if the new termination does result in voltages that can be done with the
81150A / 81160A, then the values that are displayed on the front panel will
be applied at the output.
The 81150A / 81160A tries to keep the programmed levels when the
termination changes. If this is not possible, then an error message is
displayed.
The load impedance can be set to values 0.3 to 1 M. There is no dedicated
‘high impedance’ setting.
You can set the output amplitude in Vpp, Vrms, or dBm. For more
information, see “Output Units”.
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