Specifications

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36
Function Generators
Programmable DDS Function
Generator Series
Models 4084, 4085, 4086 & 4087
The B+K Precision® models 4084, 4085, 4086 and 4087 are
high performance laboratory grade synthesized function
generators with a wide frequency range of up to 120 MHz.
Direct Digital Synthesis (DDS) techniques are used to create
stable, accurate output signals for all 27 built-in standard
and complex (arbitrary) waveforms. The generators
produce high purity, low distortion sine waves, square
waves up to 40 MHz and provide a stable output of very
small signals down to the 1mV - 10mV range. The
instrument also provides a built-in 100 MHz Universal
Counter with frequency measurement and totalize function.
The versatility and capabilities of this series make it an ideal
tool for many general-purpose test and bench applications
or for use in Training and Education.
Versatile modulation and trigger capabilities
The generators provide extensive modulation capabilities
including AM, FM, FSK, PSK, pulse modulation and lin-
ear/logarithmic sweep. Internal and external modulation
sources, as well as internal, external and gated trigger
sources are supported. Modulation parameters can be set
precisely and are adjustable over a wide range. For instance
burst count is programmable in 1 burst increments up to
10000 bursts and burst phase is adjustable in 0.1º
increments.
Convenient user interface and operation
You can adjust parameters via knob or numeric keypad.
Enter amplitude values directly in Vpp, mVpp, Vrms, mVrms
or dBm and display the correct voltage by entering the
actual output configuration used (terminated with 50 Ohm
or open circuit). You can enter frequency in terms of
frequency or seconds using time values s, ms, Hz, kHz or
MHz. Submenus are used for modulation modes and other
complex functions. The generators are fully programmable
via the standard RS232 interface, using SCPI commands.
The instrument also provides 10 memories to store and
recall instrument settings. Additionally the current state is
saved at power off and can be restored at power up.
Fig1 Single cycle burst, start phase=0º