LMX SERIES™ OPERATION MANUAL
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2018 by Pacific Power Source, Inc. (PPS) • All Rights Reserved • No reproduction without written authorization from PPS.
LMX Series Power Source Operation Manual
Page 154 of 463
6.7.13
OUTPUT IMPEDANCE Screen
The OUTPUT IMPEDANCE screen allows the output impedance of the power source to be
programmed.
Following parameters can be set from this screen:
Mode:
Selects between Real time or RMS mode.
•
Real time:
Real-time mode uses a fast responding method to control output
impedance. This mode is faster but has a more limited programming range.
It works at the signal level implanting a digital filter, equivalent to a resistor and an
inductor, in series with the output. It emulates a phase shift and waveform
distortion similar to an actual LR impedance at frequencies within the bandwidth of
the output amplifier (around 3kHz). CSC must be disabled to use this mode.
•
RMS:
RMS Mode is slower as it relies on the measured RMS output voltages and
currents to make adjustments, but it has a wider programming range.
It is based on steady state RMS measurements, not on real-time signals, so it does
not affect output waveform and phase shift. It allows higher impedance ranges
while keeping the output stable. It also allows the CSC mode to remain enabled, so
at a steady state level it provides a very accurate voltage drop (on an RMS
measurement level).
Resistance:
Sets the Resistive value for the programmable impedance.
Impedance:
Sets the Inductive value for the programmable impedance.
The soft keys on the OUTPUT IMPEDANCE screen are listed in the table below
SOFT KEY
Description
-
-
-
-
Back (SK5)
Return to previous screen
Table 6-27: Available PROGRAMMABLE IMPEDANCE screen soft keys
