User`s manual

Chapter 10
Block Diagram Description
Chapter Contents
This chapter shows how the Agilent E1445A 13-Bit Arbitrary Function
Generator (AFG) operates. The sections are as follows:
• AFG Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 445
• Arbitrary Waveform Description. . . . . . . . . . . . . . . . . . . . . . Page 446
• Generating Non-Sinusoid Arbitrary Waveforms. . . . . . . . . . Page 447
- Output DAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 447
- Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 448
- Reference Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 448
- Frequency Generators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 448
- Trigger Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 450
- Output Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 450
- Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 450
• Generating Sinusoid Waveforms . . . . . . . . . . . . . . . . . . . . . . Page 450
• Output Circuitry Description . . . . . . . . . . . . . . . . . . . . . . . . . Page 451
- Attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 451
- Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 451
- Output Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 451
- Offset Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 451
• AFG Memory Description . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 452
AFG Description
The AFG can output standard waveforms, like sinusoid, square, triangle,
and ramp waveforms, and user defined arbitrary (i.e., USER function)
waveforms. The AFG can also perform frequency sweeping,
frequency-shift-keying, output frequency lists, and DC volts.
All waveforms that the AFG generates, except DC volts, are arbitrary
waveforms. The only difference is that the AFG generates the data for the
standard waveforms internally and the user supplies the data for the
arbitrary waveforms.
Chapter 10 Block Diagram Description 445