User Manual CXE85X
59300464 Rev.005
9.12.2013 12(44)
Forward path adjustment via software
The mid stage gain, OLC enabling and slope setting can be taken into software
control. When software control is enabled, the rotary switch and jumpers have
no effect. Hardware control can be restored with reset button or via software.
There are two software control modes: manual and OMI-based. The difference
between these is in how gain is controlled. In manual mode the gain can be set
as via hardware, -15...0 dB in 1 dB steps. In newer software releases this range
is -20…0 dB for 1
st
generation devices, and -31…0 dB for 2
nd
generation
devices. In OMI-based mode the CXE85x calculates the correct gain based on
the user-specified transmitter OMI-% and target output level.
RF output power
CXE85x measures its RF output with a wideband RF detector. The result is
displayed in (approximate) dBm reading, but due to the detector frequency
response curve and calibration issues, no accuracy specification is given. The
factory default setting for the alarms is only low minor alarm enabled at -15
dBm. All alarm limits and enables can be edited by the user, and there is a
shortcut button in the UI for setting the alarm limits to ±3 and ±6 dB from the
measured value.
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