Verint Video Intelligence Solutions
75
Nextiva S4200 Series User Guide
3. In the Tx Power Scale list, select the level of emitting power of the device radio. The
default level is the maximum allowed in your country for the configured antenna. If
your system operates with a comfortable RF margin (15 dB), you may reduce the
emitting power to lower the noise generated on the other RF systems located nearby.
The available values are:
Maximum—The maximum allowed.
50%—The power is reduced by 3 dB.
25%—The power is reduced by 6 dB.
12.5%—The power is reduced by 9 dB.
4. In the Sensitivity Threshold list, select the minimum signal level perceived by the
radio of the device. Reducing the sensitivity of the radio enables unwanted “noise” to be
filtered out. A safe value is 10 dB below the current received signal level (displayed in
the CLI in the Advanced > Communication Status and Statistics > Wireless Status
menu). The default value, Normal, represents the most sensitive context. You must be
careful not to reduce the sensitivity to a level where the device would not “hear” its
legitimate correspondent. The other available values are -80 dBm, -75 dBm, -70 dBm,
and -60 dBm.
5. In the Minimum Margin box, enter the difference in dB between the actual signal
received by the device and the minimum signal required by a given bit rate to correctly
receive data on the RF link. The default minimum margin is 15 dB. This parameter is
used when the transmission bit rate is set to Auto. It only appears if the MAC mode is
SPCF.
6. In the Enable Radar Detection on Slave list, indicate whether radar detection is
enabled on slave devices in a DFS context; this parameter only appears if the selected
RF band supports DFS and if the MAC mode is SPCF. For more information on radar
detection, see page 29.
7. In the Number of Frames per Burst box, enter the maximum number of data frames
that are sent on the wireless network by a slave device each time its master polls it.
The value range is 1–8. Default is 8. The performance of the wireless network increases
as the number of frames increases.
Typically this value is set on a slave device to configure its connection to its master.
Setting this value on the master limits the maximum number of frames for all slaves
connected to it. If a slave has a lower limit than the value provided by the master, the
lowest limit will be taken.
8. In the Maximum Polling Latency box, enter the maximum delay between two polls
for the same slave, in milliseconds. The value range is 10–255. Default is 255: It
indicates that there is no latency control and provides the maximum performances.
SPCF is a polling protocol. Each slave is polled one after the other. The polling latency
is the time taken to poll all the connected slaves. For delay sensitive applications like
PTZ, it can be useful to have control on this delay. When enabled, polling latency
control will automatically adjust the maximum number of frames per burst for each
slave so that the maximum latency delay is respected. However, doing so reduces the
maximum performances of the wireless network.
9. In the IP Multicast Forward from this Interface list, indicate whether multicast
data coming from the wireless network is allowed to be sent to the Ethernet network.
