Ubiquiti Networks airFibe5 - Manual (Page 28)

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Chapter 5: Wireless Tab airFiber ® AF5/AF5U User Guide
Ubiquiti Networks, Inc.
Maximum Modulation Rate or Modulation Rate Higher
modulations support greater throughput but generally
require stronger RF signals and a higher Signal-to-Noise
Ratio (SNR). By default, Automatic Rate Adaptation is
enabled, and Maximum Modulation Rate is displayed.
This allows the airFiber AF-5 to automatically adjust the
modulation rate to changing RF signal conditions. Under
certain conditions, you may prefer to lock the Maximum
Modulation Rate to a lower setting to improve link
performance.
When Automatic Rate Adaptation is disabled, Modulation
Rate is displayed. Lock the Modulation Rate to the setting
of your choice.
Select one of the available modulation rates:
• 10x (1024QAM MIMO)
• 8x (256QAM MIMO)
• 6x (64QAM MIMO)
• 4x (16QAM MIMO)
• 2x (QPSK MIMO)
• 1x (½ Rate QPSK xRT)
• ¼x (¼ Rate QPSK xRT)
Frequency Settings
The Valid Frequencies for your Country Code selection are
displayed. Ensure that you use frequencies that comply
with the local country regulations.
TX Frequency Enter a valid transmit frequency. The
Current State is displayed.
Note: The TX Frequency on the Master should be used
as the RX Frequency on the Slave, and vice versa.
RX Frequency Enter a valid receive frequency.
DFS Frequencies
If you have Dynamic Frequency Selection (DFS)
frequencies, then you have three sets of TX and RX
Frequency options. The airFiber radio will shut down on
the current TX frequency if it detects certain radar pulses.
You can configure alternative TX frequencies as fallback
options in case of a radar-induced shutdown. For example,
if radar is detected on TX Frequency 1, then the airFiber
radio will switch to TX Frequency 2.
The three TX Frequencies of the local airFiber radio should
match the three RX Frequencies of the remote airFiber
radio, and vice versa. This ensures that in the case of radar
detection at the remote end, the local airFiber radio will
scan all RX Frequencies until it finds the TX Frequency used
by the remote airFiber radio.
Note: If you set TX Frequency 2 or 3 to 0, then they
will not be used. If there is a DFS event, then the
airFiber AF-5 will wait 30 minutes and then use TX
Frequency 1 again.
TX Frequency 1-3 Enter a valid transmit frequency. The
Current State is displayed.
Note: The TX Frequency on the Master should be used
as the RX Frequency on the Slave, and vice versa.
RX Frequency 1-3 Enter a valid receive frequency.
Wireless Security
airFiber uses 128-bit, AES (Advanced Encryption Standard)
encryption at all times.
Key Type Specifies the character format.
• HEX By default, this option uses hexadecimal
characters. 0-9, A-F, or a-f are valid characters.
• ASCII ASCII uses the standard English alphabet and
numeric characters (0-9, A-Z, or a-z).
Key Select the format of the MAC address.
• HEX Enter 16 bytes (eight, 16-bit HEX values). You can
omit zeroes and use colons, similar to the IPv6 format.
The default is:
0000:0000:0000:0000:0000:0000:0000:0000.
Note: The airFiber Configuration Interface
supports IPv6 formats excluding dotted quad and
“::” (double-colon) notation.
• ASCII Enter a combination of alphanumeric characters.
Using 128-bit, SHA1 (Secure Hash Algorithm 1), the
airFiber AF-5 hashes the ASCII key to create a 128-bit key
for AES.