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2074
User Manual
Synchronizing
Multiple
Instruments
3-64
The 2074 waveform generator has two output channels. These
outputs are just about everything you'll ever need for generating
your signals however, some applications require multiple of
synchronized channels, which can only be available if you purchase
a much more expensive waveform generator or, by combining two
separate instruments into one.
As you probably know, having two separate instruments will no do
the job because each has its own clock source. Also, driving one
generator from the clock of the other will not work because of the
nature of memory-driven digital waveform generators that must
have definite and clear signals when to start clocking the samples
of the waveform.
The two instrument synchronization technique that is utilized by the
2074 provides complete control over waveform run mode, start
point, phase offset between adjacent units while maintaining jitter-
free and skew-free synchronized outputs. Before or after multiple
instruments are synchronized, each instrument can be programmed
to have different waveform shape and amplitude however, in this
mode, both units share the same run mode, i.e., continuous,
triggered, etc.
To achieve synchronization, you must have special inter-connection
cables and, in addition, LAN cables that either connect to a LAN
network or, in case you do not use a network, two adjacent
instruments can be connected together by a cross-wired LAN cable,
with no connection to a LAN network. In any case, before you
commence with your connections, make sure you get the
synchronization cables from your Tabor dealer and get yourself
familiar with the information below.
The interconnection cables are proprietary and must be bought
from Tabor Electronics Ltd. In case you require such cables,
contact your nearest dealer or the Tabor customer service
department for price and delivery information. The purpose of these
cables is to link the necessary signals from instrument to
instrument. These signals will assure that the clock is the same, the
reference is the same and that both units share start and stop
signals for careful and complete control over waveform start phase.
Hardware synchronization is only part of the deal. The two 2074's
must be set up so that one becomes master and the other(s) slave.
Information how to connect the two instruments with the
synchronization cable, how to select the master unit and how to
proceed with synchronized operation is given in the following
paragraphs.
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