User manual

Page 10 of 13
• With Version 4.0 higher number of PHY ERR may be reported. The increase of reports is due
increase in types of errors detected, especially with HW rev C. This by itself is not affecting the
functionality of the units but only showing information that was previously not available. Noisy
environment will produce higher number of PHY ERR and these reports can be used to
identify noisy channels.
• SNMP management was checked with SNMPC version 5.1.11e.
10 Limitations & Known Issues
• Sensitivity may change slightly as a function of frequency (+/-2dB).
• Transmission power accuracy is +/-1dB above 8dBm @ antenna port (typical condition). At
lower levels the accuracy is +/-3dBm, never contradicting regulations. At very low levels the
use of ATPC may cause significant fluctuations in the power level of the transmitted signal.
When operating at such low levels, it is recommended to disable the ATPC Option in the SU
and to set the Transmit Power parameter to the average Tx Power level before the ATPC was
disabled.
• In units operating in the 5.3 GHz band, the following rule must be met for full compliance with
FCC regulations: When operating at 5270 MHz, the Transmit Power parameter in the AU, and
the Maximum Tx Power parameter in the SUs served by this AU, should not be set to a value
above “17-Antenna Gain” (The maximum allowed EIRP for 5270 MHz is 17 dBm). Note that
at this stage units that operate in the 5.2 GHz and 5.3 GHz bands are released with Hardware
revision B.
• In BreezeACCESS VL units operating in the 4.9 GHz Japan band (not B&B point-to-point) with
a 10 MHz bandwidth, the following rules must be met for full compliance with regulations:
 When operating at 4945 MHz, the Transmit Power parameter in the AU should not be set
to a value above 11 dBm. The Maximum Transmit Power of the SU should not be set to a
value above 10 dBm.
 When operating at 5055 MHz, the Transmit Power parameter in the AU should not be set
to a value above 13 dBm. The Maximum Transmit power of the SU should not be set to a
value above 10 dBm.
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