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3A SERIES
OPERATION MANUAL
Entire Contents Copyright
2014 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
3A SERIES AC & DC LOAD OPERATION MANUAL
Page 38 of 56
6.2.3
Synchronization Source Setting
Synchronization of load current with AC input voltage is accomplished in one of two available
SYNC modes:
•
EXTERNAL SYNC
•
INTERNAL SYNC
In
EXTERNAL SYNC
mode, the user must provide an input SYNC signal to the Analog
Programming Input BNC terminal of the back panel of the 34M01 single slot mainframe or the
DB9 connector on the 34M04 four slot mainframe.
The load will synchronize the current waveform to be in phase with the external SYNC signal.
Note:
The external SYNC input signal must have a duty cycle of 50%.
In
INTERNAL SYNC
mode, the internal SYNC signal is taken from the sensed input voltage using
the loads internal zero crossing detection and isolation circuits.
Table 6-6: Internal or External Sync Circuits
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