MDS 05-6302A01, Rev. B
MDS Mercury 16E Technical Manual
67
MIMO Type
The MIMO Type parameter controls
the use of the second RF antenna port.
In Matrix A/B mode, the Mercury
transceiver automatically chooses the
appropriate operating mode according
to the packet error rate (PER)
performance of the wireless channel.
None
None, Matrix A, Matrix A/B
HARQ
BS only. This is the Base Station
parameter that enables the use of
Hybrid Automatic Repeat Request.
Enabled
Enabled, Disabled
Protection Margin
SU only. Protection margin for adaptive
modulation.
3 dB
0 to 10
Hysteresis Margin
SU only. A number of decibels of SNR
added to the maximum SNR required
before shifting to the next higher
modulation and FEC rate.
3 dB
0 to 10 dB
ARQ/HARQ Settings
ARQ
BS only. This is the Base Station
parameter that enables the use of
Automatic Repeat Request.
Disabled
Enabled, Disabled
ARQ Block Size
BS only. The Block Size specifies the
number of bytes that are placed into an
ARQ block. The ARQ block is the basic
unit of exchange in the ARQ protocol.
64 bytes
16 to 1024 bytes
ARQ Window Size
BS only. The Window Size specifies
the number of ARQ blocks in the ARQ
Window. The ARQ Window is the
number of blocks that can be
outstanding at one time.
512 blocks
1 to 1024 blocks
ARQ Block
Lifetime
BS only. The Block Lifetime specifies
how long an ARQ block is considered
valid after the block’s initial
transmission. If the receiver does not
acknowledge the block within the
lifetime, the block is discarded.
250 msec
0 to 655 msec
ARQ Transmitter
Delay
BS only. Length of time ARQ
transmitter waits before repeating an
unacknowledged packet.
35 msec
1 to 655 msec
ARQ Receiver
Delay (BS only)
ARQ delay at the receiver in
milliseconds
35 msec
1 to 655 msec
HARQ Category
SU only. This is the Subscriber
parameter that selects the type of
Hybrid Automatic Repeat Request that
is used.
3
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Table 17. Configuration Parameters (Continued)
Menu Location
Parameter Name
Description
Default Value
Possible Values