5
Section 2
Introduction
Models 4001A and 4003A are 4 MHz sweep function generators. Model 4003A has an added feature of
a 20 MHz digital counter. The function generator generates sinusoidal, triangular, ramp, square, and
pulse waveforms. The type of function is selectable through a rotary switch.
The frequency is settable from 0.5 Hz to 4 MHz of the function with range selector switch and the
frequency control knob for variable adjustments with multiplication factor of 0.04 to 4.0 of the selected
frequency range.
The signal amplitude can be adjusted from 0.2 V to 20 Vpp with no load conditions and 0.1 V to 10 Vpp
with a 50 ohm load termination.
The MAIN output has the provision of SYNC output signal (TTL level) when selected.
The sweep generator offers linear or log sweep with variable sweep rate and adjustable sweep width.
(model 4003A only)
Auto ranging, 5-digit frequency counter is provided with range from 0.2 Hz to 20 MHz and resolution of
0.01 Hz. The counter is utilized for external as well as internal functions.
(model 4003A only)
In addition to the features above, an external voltage signal can be used to control the frequency of the
function. With AC input signal, FM output can be generated.
