B&K Precision 4040A - Manual - Manual (Page 5)

5
INTRODUCTION
The B&K Precision Model 4040A Sweep/Function Generator
is a versatile signal source which combines several functions into
one unit - waveform generation, pulse generation (through variable
symmetry), and frequency sweep. Additionally, the instrument
provides the added convenience of a built-in frequency counter.
This permits more accurate determination of output frequency than
is possible with a simple calibrated dial. Coarse and fine tuning
controls permit precision stability of the output frequency. The
internal frequency counter can also be used to measure external
frequencies.
The five-digit frequency counter displays the generator output
frequency or external signals from 5 to 30MHz.
With this versatility, the unit has a vast number of applications
in both analog and digital electronics in the engineering,
manufacturing, servicing, educational, and hobbyist fields.
The heart of the function generator is a VCG (voltage-controlled
generator) that produces precision sine, square, or triangle waves
over the 0.2Hz to 20MHz range. This encompasses subaudible,
audio, ultrasonic, and RF applications. A continuously variable dc
offset allows the output to be injected directly into circuits at the
correct bias level.
The sweep generator offers linear or log sweep with variable
sweep rate and adjustable sweep time. Front panel controls allow
the start and stop frequencies to be set.
Burst operation enables the output to be gated by an internal,
adjustable signal or by an externally applied signal.
Variable symmetry of the output waveform converts the
instrument to a pulse generator capable of generating rectangular
waves or pulses, ramp or sawtooth waves, and slewed sine waves.
The output can be either amplitude modulated or frequency
modulated. Modulation can be by a 1 kHz internal, adjustable
signal or by an externally applied signal.
In addition to the above features, an external voltage may be
used to control operating frequency. This is useful in situations
where an externally controlled frequency is desirable.
Many functions can be operated simultaneously, making
possible such complex outputs such as gated pulse trains with
external or internal sweep.