70 Keysight EXG and MXG X-Series Signal Generators User’s Guide
Front Panel Operation for All Models
Using Analog Modulation on the RF Carrier Signal (Option UNT)
Using Analog Modulation on the RF Carrier Signal (Option UNT)
To modulate a carrier signal, you must have both:
— an active modulation format
and
— modulation of the RF output enabled
Example
1. Preset the signal generator.
2. Turn on AM modulation: Press AM > AM Off On (requires Option UNT).
You can turn on the modulation format before or after setting signal parameters.
The modulation format generates, but does not yet modulate the carrier signal.
Once the signal generates, an annunciator showing the name of the format appears, indicating
that a modulation format is active.
3. Enable modulation of the RF output: Press the Mod On/Off key until the LED lights.
If you enable modulation without an active modulation format, the carrier signal does not
modulate until you subsequently turn on a modulation format.
4. To make the modulated carrier available at the RF output connector, press the RF On/Off key
until the LED lights.
To turn modulation
off, press the Mod On/Off key until the LED turns off.
When the Mod On/Off key is off, the carrier signal is not modulated,
even with an active modulation format.
See also: “Using Analog Modulation for All Models with Options UNT” on page131
“Using Pulse Modulation for All Models with Options UNU, UNW, 320” on
page135
“Using I/Q Modulation” on page211
Annunciator indicates active AM modulation
AM modulation format On.
A lit LED indicates that any active
modulation format can modulate
the carrier.
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