Redline AN-30 System User Manual page 34

64QAM ¾ 64QAM
(54 Mb/s) (48 Mb/s)
Max Tx
14
Power
adaptmod (Adaptive Modulation): checking this box sets the system to operate in
adaptive modulation mode. It is not recommended to keep the AN-30 in this mode as the
system will automatically change the modulation schemes thus errors can be introduced
to the TDM traffic. For systems that have upgraded with a high-speed data option, it is
recommended that the user set the modulation up to two levels below the maximum
achievable on the link. The user can define the desired modulation scheme by setting the
Uncoded Burst Rate parameter (see next item). If the current Uncoded Burst Rate meets
or exceeds this rate, the Wireless Signal LED on the front panel lights solid green. If
packet errors exceed one in one million, the system will automatically step down the
modulation scheme to maintain the link. The Wireless Signal LED will flash green if the
current Uncoded Burst Rate is lower than the configured Uncoded Burst Rate. If errors
continue when the system reaches the lowest order modulation scheme, the Signal and
Link LEDs will turn off to indicate a failed RF link.
The dynamic modulation mode can be disabled by un-checking the Adaptive Modulation
checkbox. In this manual mode, the user is required to set the Uncoded Burst Rate and
the Modulation Reduction Level (see below). To operate in manual mode, first sample
the link with Adaptive Modulation enabled, then switch to manual mode setting the
modulation scheme up to 2 levels lower than that achieved using adaptive modulation.
*Note:
In some countries outside of North America, the Maximum Operational Power Per
Channel with a given antenna is limited in accordance to maximum allowable EIRP
levels for the region
ubrate (Uncoded Burst Rate [Mb/s]): Defines the desired Uncoded Burst Rate for the
link. Obtaining a 64 QAM license key (see section 8.6) raises the available Uncoded
Burst Rate from the default 36 Mbps to 54 Mbps.
modreduct (Modulation Reduction Level): applies when Adaptive Modulation is
disabled. Specifies how many levels the system must drop in modulation during re-
transmission of erroneous wireless packets. The level can be set from 0-7, with 2 being
the recommended value.
master (Master Mode): Sets the AN-30 system to serve as the master system, while the
other AN-30 assumes a slave role. There are no consequences related to setting either
unit to serve as the master or slave. One and only one unit must be set as the master.
chgver (Software Version): Specifies the current version of the system software. Note
that software can be remotely downloaded into the AN-30 terminal. The system includes
sufficient memory to hold two independent software loads. The operator can specify
which software load is used in the system. See section 8.4 for additional details.
Redline Communications
16QAM ¾ 16QAM ½
2/3
(36 Mb/s) (24 Mb/s)
15 19 20
Page 34 of 80
AN-30 System User Manual
QPSK ¾ QPSK ½ BPSK ¾
(18 Mb/s) (12 Mb/s) (9 Mb/s)
20 20 20
.....solving the first mile challenge
BPSK ½
(6 Mb/s)
20