B&K Precision 4079 - Manual - Manual (Page 7)

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Section 1
Introduction
1.1 Introduction
This manual contains information required to operate, program and test the Model 4076 and 4079 – 50 MHz DDS Arbitrary
Function Generators. This section covers the instrument general description, instrument specifications and characteristics.
1.2 Description
The Model 4076 and 4079 are versatile high performance arbitrary waveform generators. Arbitrary waveforms can be
programmed and generated with 14 bit resolution and up to 4,000,000 points length. Waveforms can be output in continuous,
triggered, gated or burst mode. AM and FM modulation combined with versatile Sweep capabilities make the unit suitable for a
wide range of applications. Editing is flexible and easy including auto increment, line draw and predefined waveform facilities.
The instrument can be remotely operated via the RS232 or GPIB interface and they are SCPI compatible.
1.3 Memory Architecture
The waveform memory consists of 4,000,000 points. The user can edit arbitrary waveforms in waveform memory and can specify
any data value in the range from -8191 to 8191 for any point in waveform memory (14 bit depth). Due to their large memory
bank, the 4076 and 4079 can essentially give the user greater freedom in selecting the size of their waveforms and the number of
waves they desire to generate, with the limit of 4,000,000 total points when added together.
For example, these generators can create a waveform with 100,000 points, another waveform with 500,000 points, a third
waveform with 400,000 points, and a fourth waveform with 3,000,000 points. These four waveforms total up to 4,000,000 points,
but essentially they can be referenced in the memory bank according to their starting point and their length. There are no
restrictions as to how many different waveforms you can store in the memory, so as long as the sum of the points of all the
waveforms do not exceed 4,000,000 points. To better illustrate this, refer to drawing below:
The following operations can be performed in the waveform memory:
- Insert and scale any of the following predefined waveforms:
o Sine
o Triangle
o Square
o Ramp up
o Ramp down
o Noise
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4,000,000
Waveform 1 Waveform … Waveform 2 Waveform 3
A pts. B pts. C pts.
D pts.
A pts. + B pts. + C pts. + D pts. ≤ 4,000,000 pts.
Point Point