Using Functions ESG Family Signal Generators
Setting Frequency and Power Levels
2-4
User’s Guide
To Set an Amplitude Reference and an Amplitude Offset
The following procedure sets the RF output power as an amplitude reference to which all
other amplitude parameters are relative. The amplitude initially shown on the display will
be 0 dB (the power output by the hardware minus the reference power). Although the
display changes, the output power does not change. Any subsequent power changes are
shown as incremental or decremental to 0 dB.
1. Press
Preset to return the signal generator to the factory-defined instrument state.
2. Set the RF output power to
−
20 dBm.
3. Turn on amplitude reference mode and set the current output power (
−
20 dBm) as the
reference value. Press
Ampl > More (1 of 2) > Ampl Ref Set. The amplitude displayed is 0 dB
(the power output by the hardware,
−
20 dBm; minus the reference value,
−
20 dBm).
Notice that the
REF indicator is turned on and the Ampl Ref softkey has toggled to On.
4. Set the
RF On/Off key to On. Notice that the display annunciator has changed from
RF OFF to RF ON. The power at the RF OUTPUT connector is
−
20 dBm.
5. Use the up arrow key to increase the output power by 10 dB. The amplitude display
changes to show 10 dB (the power output by the hardware,
−
20 dBm; +10 dBm; minus
the reference power,
−
20 dBm) and the output power changes to
−
10 dBm.
6. Enter a 10 dB offset. Press the
Ampl Offset softkey and enter 10 dB using the numeric
keypad. The amplitude display shows 20 dB (the power output by the hardware,
−
10 dBm; minus the reference power,
−
20 dBm; plus the offset, 10 dB). Notice that the
OFFS indicator is turned on. The power at the RF OUTPUT connector is still
−
10 dBm.
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