Verint Nextiva S1100, Руководство пользователя

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4: Using the Configuration Assistant
36 Verint Video Intelligence Solutions
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Channel—If your devices are operating in a DFS environment, you cannot manually
select the frequency channel; in this context, the displayed value is Auto. In a non-DFS
environment, you can either manually select a channel or choose the automatic channel
selection.
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Channel Bandwidth—In the 4.9 GHz public safety band, you can change the width of
the frequency channel, to be able to install more systems in the same area. Possible
values are 5 MHz, 10 MHz, and 20 MHz (default). The list of available channels vary
depending on the chosen bandwidth.
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Bit Rate—The Auto value represents the best possible value (with an RF margin of
15 dB) automatically assigned when the connection was established with the other
device. It is the default value.
Once the device is operating properly, Verint strongly recommends to change the
configured bit rate from Auto to the actual bit rate of the connection. This way, the
wireless communication will be more stable in the presence of changing atmospheric
conditions or other RF interferers. To know the actual bit rate of the connection, look in
the Wireless Status window (see page 38). If the quality of the RF link degrades
severely, the actual bit rate could be lower that the manually configured one.
The available bit rates vary depending on the frequency band:
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Starting Order—At the beginning of the boot sequence in a DFS context, the receiver
device waits a specific number of seconds based on the value of this parameter. This
wait period will ensure that no two receivers will start at the same time and select the
same frequency channel. The starting order delay is: (order - 1) multiplied by
80 seconds.
The default starting order is 1; every colocated system should have a different value for
this parameter.
This parameter takes effect only when the RF channel is set to Auto.
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Antenna Gain—If you use an external antenna with your device, it is important to enter
its gain in the Configuration Assistant. This way, the device will be able to automatically
change its transmission power so that the total power (device and antenna) does not
exceed the maximum value established by your country’s regulations.
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Transmit Power Scale—The available values for the emitting power are:
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Maximum
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50%—The power is reduced by 3 dB.
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25%—The power is reduced by 6 dB.
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12.5%—The power is reduced by 9 dB.
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Minimum—The power is set at 3 dBm.
Band Channel bandwidth Bit rates (Mbps)
2.4 GHz N/A 6, 9, 12, 18, 24, 36, 48, and 54
4.9 GHz 5 MHz 1.5, 2.25, 3, 4.5, 6, 9, 12, and 13.5
10 MHz 3, 4.5, 6, 9, 12, 18, 24, and 27
20 MHz 6, 9, 12, 18, 24, 36, 48, and 54
5 GHz N/A 6, 9, 12, 18, 24, 36, 48, and 54