Fluke 396 - Manual (Page 6)

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Getting Started
4
Frequency Agility
The Instrument generates its sample clock from a DDS circuit (direct digital synthesis).
The DDS circuit enables frequency agility through the complete frequency range of the
instrument. Having such an enormous range opens the door for a wide range of
applications such as wide band sweep, FSK and frequency modulation. The Instrument
can generate FSK, Ramped FSK and Linear or Logarithmic sweep. The Instrument can
also frequency modulate its carrier using one of its built-in waveforms, or with any user-
defined modulating signal, which can be downloaded using the FM wave composer.
Multi-Instrument Synchronization
There are applications requiring multiple of synchronized channels. Synchronization
between completely independent, free-running units is complex. Besides distribution of
the sample clock to all units, each unit has to be told when to start generating waveforms
so that all start at the same point and with the same phase. Triggering multiple units to
achieve synchronization is not enough because it will generate a jitter of ± 1 count. Multi-
unit synchronization is built into the Instrument, where special connectors and cables
were designed to eliminate jitter and to provide start phase control. There is no limit to
the number of units that can be daisy-chained, multiple unit synchronization is built into
each Instrument.
Safety Considerations
The Instrument has been manufactured according to international safety standards. The
Instrument meets EN61010, VDE 0411/03.81 and UL 1244 standards for safety of
commercial electronic measuring and test equipment for instruments with an exposed
metal chassis that is directly connected to earth via the chassis power supply cable.
W Warning
To avoid personal injury from electrical shock and fire hazards,
carefully read and follow the WARNINGS given in the following
paragraphs.
•
Do not remove covers form the Instrument when operating it or
when the power cord is connected to line power.
•
Do not operate the unit with power applied and protective covers
removed unless you are qualified to service the product.
•
If you are qualified to service the product, read all of the calibration
and maintenance procedures and heed all warnings to avoid “live”
circuits points.
If the Instrument exhibits any of the following conditions do not
operate the Instrument:
•
Fails to operate satisfactorily
•
Shows visible damage
•
Has been stored under unfavorable conditions
•
Has sustained stress
Before operating the Instrument check the following:
•
Instrument performance has been verified by qualified personnel.
•
The common connector on the power cord is connected to the
neutral connection (ground) of the power outlet.