N5161A/62A/81A/82A/83A MXG Signal Generators User's Guide

Using Pulse Modulation (Option UNU or UNW)The Basic ProcedureThe Basic Procedure1. 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 > selectionb. Set the parameters for the selected pulse source:Square Free Run (default) Triggered Adjustable Doublet Trigger Doublet Gated ExternalPulse Rate ⎯ ⎯ ⎯ ⎯ ⎯ ⎯⎯ Pulse Period ⎯ ⎯ ⎯ Pulse Period ⎯⎯ Pulse Delay Pulse Delay Pulse Delay Pulse Delay ⎯ ⎯⎯ Pulse Width Pulse Width Pulse Width Pulse Width Pulse Width ⎯⎯ ⎯ ⎯ Pulse 2 Delay ⎯ ⎯ ⎯⎯ ⎯ ⎯ Pulse 2 Width ⎯ ⎯ ⎯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 61.ExampleThe following example uses the factory preset pulse source and delay.Output:A 2 GHz, 0 dBm carrier modulated by a 24 μs pulse that has a period of 100 μs.1. Preset the signal generator.2. Set the frequency to 2 GHz.3. Set the amplitude to 0 dBm.4. Set the pulse period to 100 microseconds: Press Pulse > Pulse Period > 100 > usec.5. Set the pulse width to 24 microseconds: Press Pulse > Pulse Width > 24 > usec6. Turn on both the pulse modulation and the RF output.The PULSE annunciator displays and the RF output LED lights.If the modulation does not seem to be working properly, refer to “No Modulation at the RF Output”on page 316.Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 133