Harris RF-7800W-OU49 series, Руководство по установке и эксплуатации

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3-17
RF-7800W
SYSTEM ADMINISTRATION AND CONFIGURATION
R
power, radios will increase their power in order to meet the target RSSI. When link conditions improve, radios
reduce their power accordingly. All radios will respect the configured maximum transmit power setting.
3.8.10 Interference Mitigation
Interference Mitigation settings are described below. All parameters for Interference Mitigation can be accessed
using GUI, CLI, and SNMP interfaces.
The radio employs multiple methods of dealing with co-channel interference. Dynamic Frequency Selection (DFS)
and Enhanced Interference Mitigation (EIM) are mutually exclusive. DFS is required for Federal Communications
Commission (FCC) compliance in certain frequency bands and designed for radar detection and avoidance. EIM is
intended for general interference detection and designed to maintain healthy operating links in response to both
deliberate and accidental interference. EIM may be purchased separately. Refer to
Paragraph 5.6 .
3.8.10.1 DFS Action
DFS can be configured to either turn off the radio transmitter for 30 minutes or change the radio's operating
frequency. If either event occurs, a DFS event trap is sent via SNMP to any configured receivers. The channel change
feature respects the configured frequency list. When the radio changes channels, it also turns the transmitter off for
one minute and monitors the channel. If radar is detected again, the radio will continue to change channels until a
vacant channel is found.
3.8.10.2 Antenna Gain
DFS requires knowledge of the antenna in use in order to properly set the trigger sensitivity. The default gain is set
to the highest gain antenna that is offered for use with the radio, but should be changed to the gain of the actual
antenna in use. When this setting is higher than the actual antenna gain, the radio is not sensitive enough to radar
signals. Conversely, the radio will be too sensitive and may inadvertently trigger a DFS event if this is set lower than
the actual antenna gain.
3.8.10.3 EIM Detection
Since interference may not affect both radios in a link, EIM is configured to detect interference separately on the SC
and SS radios. EIM looks for unusually low SINADR for a given RSSI, unusually high bit-error rates and an
unusually high noise floor. SNMP traps are sent to network managers when EIM events occur and when interference
has cleared. EIM may be purchased separately. Refer to
Paragraph 5.6 .
GUI CLI SNMP