Signal Source Settings - Omicron Lab Bode 100 User Manual

9.2

Signal source settings

Signal source mode
The signal source of Bode 100 can be set two to different operation modes:
1. Auto off (default)
2. Always on
In Auto off mode, the source will be automatically turned off whenever it is not used, respectively
when a measurement is stopped.
In Always on mode the signal source stays on after a measurement has finished. This means that
e.g. the last frequency point in a sweep measurement defines the signal source frequency and level.
You can change the source mode either in the hardware setup
source indicator in the status bar
The source indicator shows both, the current setting and if the source is on or off. A gray background
indicates that the source is switched off. A green background color indicates that the signal source is
running. The following states are possible:
Output level unit
Bode 100 by default uses dBm as the output level unit. 1 dBm equals 1 mW at 50 Ω load.
You can also choose Vrms or Vpp as output unit however, please don't forget that the real
output voltage of Bode 100 depends on the impedance connected to the output. The inner
50 Ω source impedance of Bode 100 introduces a voltage drop that depends on the
impedance connected at the output port.
The output level unit can be changed in the options. Click on
your choice:
You can choose Vrms which is the root mean square of the output voltage at 50 Ω load. Again the real
output voltage depends on the load you connect to the output. The internal source voltage is 2 times
higher than the displayed value. Choose Vpp to display the output voltage in peak-to-peak voltage.
Again, the value is valid when a 50 Ω load connected to the output.
Changing the level unit only affects new files / measurements that are created after changing
the unit. The level unit is part of the settings stored in the .bode3 file.
98
.
Source mode is Auto off and source is currently off
Source mode is Auto off and source is currently on
Source mode is Always on and source is on
Source mode is Always on but source is still in off-state. Source will be
switched on as soon as the next measurement has been executed.
.
or by moving the mouse over the
and select the default level unit of
OMICRON Lab