Fluke PN 2430621 - Manual (Page 3)

Function Generators
Introduction
1
Introduction
This manual provides a brief description and safety information for both t h e Model 80 -
Function Generator and Model 81 - Pulse/Function Generator. The Instruction Manual
(provided on the CD-Rom) provides complete operating and maintenance
instructions.
Description
Model 80 is an extremely high-performance programmable function generator. It provides a variety
of signal waveforms, to be used as test stimuli for different electronic devices. Microprocessor
based, Model 80 is easy to set up for manual use. It is also simple to program in GPIB system
environment.
The instrument is built in an all-round metal case for improved RFI and EMI shielding. It is
housed in a size to fit half-rack enclosures. Regardless of its small size, Model 80 offers many
features and functions, such as enhanced accuracy, eight different linear and logarithmic sweep
modes, automatic phase lock loop, pulse and ramp waveforms with transition time control
(Model 81 only), counted burst, internal trigger generator, full implementation of the new
IEEE-488.2 standard, and more. But, most of all, Model 80 guarantees high quality waveforms
through- out the specified frequency range, amplitude span, and operating temperature.
Model 80 generates waveforms within a frequency range from 10mHz to 50MHz and an
amplitude span from 10mV to 32Vp-p. Such broad coverage warrants a variety of complex
applications. Rapid, repeatable testing every time is assured by a non-volatile mem- ory. Up to
30 front panel set-ups can be stored and recalled for later use; ensuring exact duplication of
previous tests. Its performance, programmability and economy make it equally at home in every
laboratory.
For improved output accuracy, Model 80 employs a built-in counter. This counter is
incorporated in an internal loop which constantly monitors the output frequency. Even the
slightest deviation from the programmed frequency is detected and corrected by the
microprocessor circuit.
Model 80 features self-calibration and self-diag- nostic functions that can be operated anytime from
the front panel or GPIB command. The self-calibration function compares the output signal
parameters to built-in internal references and stores correcting fac- tors in special tables. If
calibration routine fails or can not be completed due to electrical faults, the generator produces a
failure list that can be evaluated either from the front panel or through GPIB status reporting
command.
Besides its normal continuous mode, Model 80 offers a variety of interrupted and controlled
modes. Output waveform may be gated, triggered, or may generate a counted burst of output
waveforms. A built-in trigger generator, having a programmable period, can replace an external
trigger stimulant. The MANUAL trigger is just an additional convenience for front panel
operation. The generator may also be placed in a number of externally controlled modes, such as
VCO, FM, AM, and pulse width modulation (PWM - Model 81 only).
Model 80 may be used as an independent sweep generator with its output swept over an
exceptionally wide range of 10 decades. The instrument offers a choice of eight sweep modes,
both linear and loga- rithmic to cover a large number of applications. A MARKER output
provides an oscilloscope Z-axis modulation to intensify segments of sweep trace.
Alternately, Model 80 may also be used as a stand-alone phase lock generator. The instrument
locks automatically to an external signal and equates its output frequency and phase to that
provided by the external reference. The operator may then gen- erate a phase offset between the
reference signal and the generator’s output. Phase offset is adjusted within a range of ±180°.