5730A
Operators Manual
4-26
Wideband AC Voltage Output (Option 5730A/03 or 5730A/05)
To set an output from the Wideband AC Module (Option 5730A/03 or 5730A/05),
proceed from or the power-up state as follows:
1. Make sure the Calibrator is in standby (STANDBY annunciator lit). Push if
necessary.
2. If the UUT is not connected, connect it now as described previously in this chapter
under “Connect the Calibrator to a UUT.”
3. Set the UUT to read ac voltage on the appropriate range.
4. Touch Wideband.
5. With the numeric keypad, enter the necessary output amplitude, expressed as voltage
or a dBm level.
Note
In the Wideband AC function, dBm means decibels relative to 1 mW,
calculated for a 50
Ω
load. The formula to calculate dBm is 10 log (power
in mW). For example, if 3.0 V is supplied to a 50
Ω
load, the dBm level is:
10 log (180.0 mW) = 22.5527 dBm
If the Calibrator is switched to standard ac output, but dBm is kept as the
displayed units, the dBm value changes. The value changes because dBm is
calculated for a 600
Ω
load in the standard ac output function. With the
same voltage level as in the previous example, if the Calibrator is switched
to standard ac output, the dBm level changes to:
10 log (15.0 mW) = 11.7609 dBm.
6. To enter a negative dBm value, push .
7. Push or if necessary.
8. Push for volts or for volts expressed as dBm.
To Next Page
Loading...
