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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.
