User manual

Chapter 2 - Managing a Single Device/Cell Air Interface General Page
AlvariCRAFT Device Manager 43 User Manual
SUs/RB is below 20 seconds (The age of all SUs/RB can be viewed in the Display
Association Info option of the AU/BU MAC Address Database using Telnet).
Do not activate the OFDM Weak Signal parameter if the SNR is below 36 dB.
Under normal conditions, the OFDM Weak Signal should never be activated in the
AU/BU, since the SNR of all SUs/RB served by it will be below 36 dB when ATPC
is enabled.
The Noise Immunity parameters includes the following:
Noise Immunity State
Control
The Noise Immunity State Control defines the activation mode of the
Adaptive Noise Immunity mechanism: Automatic or Manual. The
following parameters of the Noise Immunity Control mechanism are
applicable only for Manual mode (except to Pulse Detection
Sensitivity that is applicable regardliss of the selected option for this
parameter).
Noise Immunity Level The Noise Immunity Level parameter sets the threshold for immunity
against broadband interfering signals. A higher value may reduce the
number of errors at the expense of reduced sensitivity.
The range is from 0 to 4. In the current version only 0 and 4 should be
used.
Spur Immunity Level The Spur Immunity Level parameter sets the threshold for immunity
against narrow band interfering signals such as spurious from signals
at other frequencies. A higher value may reduce the number of errors
at the expense of reduced sensitivity.
The range is from 0 to 7.
OFDM Weak Signal The OFDM Week Signal parameter sets the threshold for immunity
against interfering OFDM signals.
The available options are Disable and Enable. Enable means that the
unit will immediately reject OFDM packets with a relatively low SNR.
Pulse Detection
Sensitivity
The Pulse Detection Sensitivity parameter affects the Phy error count:
If it is set to Low, than all Phy errors will be reported as regular Phy
errors, regardless of the signal level. If it is set to High, all Phy errors
with levels bellow a certain threshold (not accessible to the user) will
be reported as regular Phy errors, while those with levels higher than
the threshold will be reported as detected radar pulses.
When DFS (radar detection) is used, or during Spectrum analysis
test, the Pulse Detection Sensitivity is set internally to High
(regardless of the configured option).