26
Agilent E8663B Analog Signal Generator User’s Guide
Basic Operation
Configuring the RF Output
3.
Change the amplitude to
−
20 dBm: Press
Amplitude
>
−
20
>
dBm
.
The new output power displays in the
AMPLITUDE
area of the display and in the active entry area. Until
you press a different front panel function key, amplitude remains the active function. You can also
change the amplitude using the up and down arrow keys or the knob.
Setting the Amplitude Reference and 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 is 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
.
2.
Set the amplitude to
−
20 dBm: Press
Amplitude
>
-20
>
dBm
.
3.
Activate the amplitude reference mode and set the current output power (
−
20 dBm) as the reference
value: Press
More (1 of 2)
>
Ampl Ref Set
.
The
AMPLITUDE
area displays
0.00 dB
, which is the power output by the hardware
(−
20 dBm) minus
the reference value (
−
20 dBm). The
REF
indicator activates and the
Ampl Ref Off On
softkey toggles On.
4.
Turn the RF output on: Press
RF On/Off
.
The display annunciator changes to
RF ON
. The power at the RF OUTPUT connector is
−
20 dBm.
5.
Change the amplitude increment value to 10 dB: Press
Incr Set
>
10
>
dB
.
6.
Use the up arrow key to increase the output power by 10 dB.
The
AMPLITUDE
area displays
10.00 dB
, which is the power output by the hardware
(- 20 dBm plus 10 dBm) minus the reference power (
−
20 dBm). The power at the RF OUTPUT connector
changes to
−
10 dBm.
7.
Enter a 10 dB offset: Press
Ampl Offset
>
10
>
dB
.
The
AMPLITUDE
area displays
20.00 dB
, which is the power output by the hardware (
−
10 dBm) minus
the reference power (
−
20 dBm) plus the offset (10 dB). The
OFFS
indicator activates. The power at the
RF OUTPUT connector is still
−
10 dBm.
Configuring a Swept RF Output
An E8663B signal generator has two sweep types: step sweep and list sweep.
The signal generator indicates the sweep advance in a progress bar on the front- panel display. If the sweep
time is greater than one second, the progress bar sweep advances according to the frequency span of each
segment. For each segment in the span, the progress bar displays the full segment and then the sweep is
taken. With sweep times less than one second, the progress bar is drawn, the sweep taken, and the
progress bar is then blanked.
