ACT-5X+ Exciter User Manual
Version 1.1 5/8/2015 Page 14 of 33
2) The "ADPC" parameter in the "SYSTEM" sub-menu has options of "UPDATE", "HOLD" and
"OFF". If option "OFF" is selected, the ADPC function will be turned off (no correction applied). If
option "HOLD" is selected, the exciter will apply the last stored linear and non-linear correction
coefficients. If both feedback signals are connected properly and option "UPDATE" is selected, this
will cause the exciter to run the Adaptive Digital PreCorrection (ADPC) function, automatically
computing coefficients for both the linear and non-linear pre-correction for the entire transmission
system including the distortion of both transmitter and band-pass filter. This process takes about 8 to
10 minutes, after which the computed corrections are automatically store in nonvolatile memory.
Please refer to Chapter 4 for detailed information.
3) The "INPUT" setting has two options, "TUNER" (Translator Mode) and "TS" (Exciter Mode). When
"TUNER" is selected, the unit functions as a translator which receives an off-air RF signal with a
tuner, and then performs the demodulation, followed by a modulation. When "TS" is selected, the unit
functions as an exciter which receives an ASI TS signal directly and performs only the modulation.
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