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DC Power Supplies
Twisting the load wires provides an additional benefit in reducing the parasitic
inductance of the cable. This improves the dynamic response characteristics at
the load by maintaining a low source impedance at high frequencies. Also, with
long load wires, the resultant inductance and resistance could produce high
frequency voltage fluctuations at the load because of current variations in the
load itself. The impedance introduced between the output of the power supply
and the load could make the ripple/noise voltage at the load worse than the
specification of the DC power supply modules (which is valid when measured at
the front panel connector) because of the contribution to the ripple/noise by the
load current. Additional filtering with bypass capacitors at the load terminals may
be required to bypass the high frequency load currents.
OPERATION
6.5
The ReFlex Power™ DC power supplies can be configured for stand-alone,
parallel, series, and series-parallel operation.
I
6.5.1
NTRODUCTION
The DC power supply modules function within the ReFlex Power™ system under
remote control through a host controller. The ReFlex Power™ Controller module
serves as a communications portal between the power supply modules and the
remote host controller. All aspects of operation could be achieved through use of
commands that comply with the requirements of the SCPI Standard 1999
command language. Additional discrete digital and optional analog control
signals are available for dedicated hardware interface. All connectors for control
and power interface are accessible on the front panel
6-46
ReFlex Power™
M380056-01 Rev L
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