Agilent Technologies 33120A Quick Manual
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Agilent Technologies 33120A Quick Manual

Signal generator
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Version
Draft
1.00
Agilent 33120A Signal Generator
UTA Quick Guide
Date:
02/14/17
02/17/17
0

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Summary of Contents for Agilent Technologies 33120A

  • Page 1 Agilent 33120A Signal Generator UTA Quick Guide Version Date: Draft 02/14/17 1.00 02/17/17...

  • Page 2: Table Of Contents

    Table of Contents Agilent 33120A Signal Generator ........................0 UTA Quick Guide ............................0 Basic Controls ..............................2 Prerequisites ..............................3 Setting up a Sine Wave ..........................3 Adjusting the Amplitude ........................... 4 Method 1............................... 4 Method 2............................... 4 Adjusting the Frequency ........................... 4 Offset ................................

  • Page 3: Basic Controls

    Figure 1: Front View Control Menu 1. Power on/off. When powering on the unit, the 33120A performs a self test. If the self test fails, contact a lab technician. 2. Waveform select. Choose from Sine, Square, Triangle, Ramp, Noise and Arbitrary. Selecting the shift key first lets you access Amplitude Modulation, Frequency Modulation, Frequency Shift Keying, Burst menu, Sweep menu, and the Arbitrary list.

  • Page 4: Prerequisites

    Prerequisites In order to measure the signals coming from the Agilent 33120A signal generator, you need to be able to understand and operate an oscilloscope. You should read the UTA Quick Start Guide for the Tektronix TBS 1052B-EDU Oscilloscope (http://www.uta.edu/ee/current-students/UG-lab/user-guides/Tektronix- TBS1052B-EDU-UTA-Quick-Guide.pdf) before proceeding with this guide.

  • Page 5: Adjusting The Amplitude

    Adjusting the Amplitude There are two methods for adjusting the amplitude. Method 1 Press the left and right arrow keys to select a digit on the display, then spin the wheel to increase/decrease the value. Method 2 Press the button Enter Number, it has green lettering, then type in your desired value using the green numbers to the left of the buttons.
  • Page 6 2. You will probably see the Sinc waveform (the default for Arb). See Figure 3. 3. To access the entire list of arbitrary waveforms press Shift -> Arb List. Then use the right or left arrow keys to scroll through the arbitrary list. Select NEG_RAMP and press the Enter button. Repeat this step to view the other arbitrary waveforms.

  • Page 7: Burst

    Burst Normally the Agilent 33120A signal generator sends a continuous signal. You can change this by setting up burst mode. Observe the output of the signal generator with the oscilloscope to see how burst mode works. 1. Set the frequency to 1kHz and the amplitude to 1 Vpp.

  • Page 8: Setting Up A Sweeping Frequency

    Modulation A sine wave by itself is pretty meaningless. Modulation is the act of varying a wave to convey information. The Agilent 33120A can modulate a frequency (called a carrier frequency because it carries information) with three common modulation techniques.
  • Page 9 2. You might be able to hear a local A.M. station, but we are going to overpower the signal with the signal generator. Press Shift -> AM to turn on the amplitude modulation. 3. Set the oscilloscope to 200 mVpp and 2.50ms. See figure 8. 4.

  • Page 10: Frequency Modulation

    Figure 9: carrier frequency with no A.M. modulation Figure 10: 50 % Depth of an A.M. signal. Frequency Modulation Frequency modulation varies the frequency of the higher frequency carrier wave to convey the frequency and amplitude of another lower frequency wave. 1.

  • Page 11: Frequency Shift Keying (Fsk)

    the pitch of your voice. Press Shift -> Freq again and slowly increase the MOD frequency to 100Hz. Adjust the oscilloscope horizontal back to 250Hz. 8. The amplitude of the information, E.g. The volume of your voice, is conveyed by how far the carrier deviates back and forth.

  • Page 12: Saving And Recalling

    Saving and Recalling Navigating the menu can be quite difficult on the Agilent 33120A. If you have a certain setup you use over and over, it is a good idea to store the settings. You can then recall your settings with two button presses.

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