Agilent X-Series Signal Generators User’s Guide 133
Using Pulse Modulation (Option UNW or 320)
The Basic Procedure
The Basic Procedure
1. Preset the signal generator.
2. Set the carrier (RF) frequency.
3. Set the RF amplitude.
4. Configure the modulation:
a. Set the pulse source: Press Pulse > Pulse Source > selection
b. Set the parameters for the selected pulse source:
5. Turn on the modulation: Pulse Off On softkey to On.
The the PULSE annunciator lights, indicating that you enabled modulation.
6. Output the modulated signal from the signal generator: Press the front panel RF On Off key.
The RF output LED lights, indicating that the signal is transmitting from the RF output connector.
See also, “Modulating the Carrier Signal” on page 59.
Example
The following example uses the factory preset pulse source and delay.
1. Preset the signal generator.
2. Set the frequency to 2 GHz.
3. Set the amplitude to 0 dBm.
Square Free Run
(default)
Triggered Adjustable Doublet Trigger Doublet Gated Pulse
Train
a
a
Requires Option 320.
External
Pulse Rate ⎯⎯ ⎯ ⎯ ⎯ ⎯⎯
⎯ Pulse
Period
⎯⎯ ⎯Pulse Period ⎯⎯
⎯ Pulse
Delay
Pulse Delay Pulse Delay Pulse Delay ⎯ Pulse Delay ⎯
⎯ Pulse
Width
Pulse Width Pulse Width Pulse Width Pulse Width ⎯⎯
⎯⎯ ⎯Pulse 2 Delay ⎯⎯⎯⎯
⎯⎯ ⎯Pulse 2 Width ⎯⎯⎯⎯
⎯⎯ ⎯ ⎯ ⎯ ⎯
Pulse On
b
b
Up to 2047 pulse cycles (elements) composed of both Pulse On and Pulse Off can be user defined.
⎯
⎯⎯ ⎯ ⎯ ⎯ ⎯
Pulse Off
b
⎯
Output: A 2 GHz, 0 dBm carrier modulated by a 24 μs pulse that has a period of 100 μs.
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