E1445A Datasheet, PDF (1/4 Pages) Keysight Technologies – Arbitrary Function Generator

Agilent E1445A
Arbitrary Function Generator
Data Sheet
• 1-Slot, C-size, message based
• 13-bit resolution, 40 MSa/s
• 256 kSa waveform segment memory
• Waveform and frequency hopping with sweep function
• Direct access to high-speed registers
• Built-in self-test
Agilent E1445A
Description
The Agilent E1445A Arbitrary Function Generator is a C-size,
1-slot, message-based VXI module. It provides the
flexibility to produce virtually any waveform needed.
The deep memory allows downloading a large number of
waveforms at once, and can store up to 128 waveforms using
SCPI programming. The memory sequencer lets you link
waveform segments together in any order. These sequences
can be repeated 1 to 64 k times or continuously. Within a
sequence, the segments can be repeated up to 4,096 times
using only one sequence memory entry. This memory
structure lets you build large, complex waveforms out of
small segments.
Refer to the Agilent Technologies Website for instrument
driver availability and downloading instructions, as well as for
recent product updates, if applicable.
Produce Complex Waveforms
Essentially, there are two memories built into the E1445A:
1. 256 kSa segment memory that supplies the digital-to-analog
converter (DAC) with its output values; and
2. 32 k-segment sequence memory that defines how the
segments are consecutively linked together at full speed.
The memory sequencer lets you link waveform segments
together in any order. These sequences can be repeated 1 to
64 k times or continuously. Within a sequence, the segments
can be repeated up to 4,096 times using only one sequence
memory entry. This memory structure lets you build large,
complex waveforms out of small segments.
Precisely Control the Frequency
One of the clocks is created by the Direct Digital Synthesis
(DDS) technique. With DDS, you get very high resolution. This
allows you to precisely set the frequencies you need.
For signals with the lowest phase noise, crystal oscillators
with divider circuits are also on-board to clock the DAC. This
allows you to set values like 20 MSa/s with minimal jitter.
Hop Frequencies
Frequency hopping is done easily by programming a list of
frequencies and instructing the internal microprocessor to
step through the list. As an added benefit, the frequency
changes are phase continuous. Using this feature, you can
produce bursts of several tones.
Drive the DAC Directly
When you have an extremely long or indeterminate
waveform, you can use the VXI Local Bus or the faceplate
connector to drive the DAC directly. This lets your process
define the waveform being produced by the E1445A. Local
Bus speed is limited to 7.4 MSa/s typical. Neither is paced by
the internal time base, they must be paced externally.
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