No Modulation At The Rf Output - Agilent Technologies E8663B User Manual

4. Turn the RF off: set
5. Turn the signal generator's automatic leveling control (ALC) off: press
6. Monitor the RF output amplitude as measured by the power meter.
7. Press and adjust the signal generator's RF output amplitude until the desired power is
Amplitude
measured by the power meter.
Setting Power Search Mode
Power search mode executes a power search routine that temporarily activates the ALC, calibrates the
power of the current RF output, and then disconnects the ALC circuitry. See the E8663B Analog
Signal Generator Key Reference for more information on the Power Search function.
Use the following steps to set the signal generator to manual fixed power search mode:
1. Preset the signal generator: press
2. Set the desired frequency: press
3. Set the desired amplitude: press
4. Turn the signal generator's automatic leveling control (ALC) off: press
5. Turn the RF on: set
6. Press
Do Power Search
This executes the manual fixed power search routine, which is the default mode.
There are three power search modes: manual, automatic, and span.
When is set to Manual, pressing
Power Search
routine for the current RF frequency and amplitude. In this mode, if there is a change in RF
frequency or amplitude, you will need to press
When is set to Auto, the calibration routine is executed whenever the frequency or
Power Search
amplitude of the RF output is changed.
When is set to Span, pressing
Power Search
over a selected range of frequencies at one time. The power search corrections are then stored and
used whenever the signal generator is tuned within the selected range of frequencies.

No Modulation at the RF Output

Check the MOD ON/OFF annunciator on the display. If it reads MOD OFF, press
modulation on.
Although you can set up and enable various modulations, the RF carrier is modulated only when you
have also set
Mod On/Off
Agilent E8663B Analog Signal Generator User's Guide
to On.
RF On/Off
.
Preset
Frequency
Amplitude
to On.
RF On/Off
.
Do Power Search
Do Power Search
to On.
and enter the desired frequency.
and enter the desired amplitude.
executes the power search calibration
again.
Do Power Search
executes the power search calibration routine
Troubleshooting

No Modulation at the RF Output

> to Off.
Amplitude ALC Off On
> to Off.
Amplitude ALC Off On
to toggle the
Mod On/Off
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