HN-291D
Set Hop Duration
Sets the length of time the transceiver spends on each frequency channel. A smaller
value will allow the remote to lock on to the base signal faster at system startup, and
will generally decrease packet latency. A larger value increases network capacity,
due to decreased overhead in channel switching. The hop duration is specified in
185.2 µs increments. The default value of
87H
corresponds to a duration of 25ms.
The maximum value of
FEH
is 47 ms. For best results, do not specify a duration of
less than 15 ms. This value only needs to be set in the base which broadcasts the
parameter to all remotes. However, link time can be reduced if this value is also
programmed into the remotes, which use it as a starting value when scanning for the
base.
Set Minimum Data Length
This sets the minimum threshold number of bytes required to form a packet in
transparent mode. The radio will wait until the data transmit delay elapses before
sending a data packet with less than this number of bytes. This parameter can be used
to keep short, intermittent transmissions contiguous. In packet modes, the length
parameter in the data packet will override this value (See Section 3.1). This value is
subject to the maximum data length even in packet mode. See Get Maximum Data
Length below.
Get Maximum Data Length (read only)
This parameter indicates the largest number of bytes that a remote will transmit per
hop, based on the size of the slot it has been allocated by the base. In general more
remotes mean less data can be transmitted per remote. By reading this parameter and
dividing by the hop duration, the remote's data rate capacity can be determined.
Attempting to send protocol mode packets longer than
maximum data length
will
result in the packet being discarded without being sent.
Set Maximum Number of Remotes (base only)
This parameter limits the number of remotes that can register with a given base. The
default is 62 remotes which is the maximum number of remotes that can be registered
with a base at one time. This command is useful when used in conjunction with
global roaming for load balancing when base stations are collocated. It is also useful
to assure a minimum remote throughput.
Set Packet Attempts Limit
If
ARQ Mode
is set to 0, sets the number of times the radio will attempt to send an
unsuccessful transmission before discarding it. If
ARQ Mode
is set to 1, it is the
number of times every transmission will be sent, regardless of success or failure of a
given attempt. When this parameter is set to
FFH
, RF flow control mode is entered
for transmissions from the radio. This mode can be entered for one or both radios in a
point-to-point system. Using this mode in a point-to-multipoint system will stop
transmissions to all radios when any one radio has a full buffer.
©
2000- 2004 Cirronet
™
Inc
37
M-0910-0002 Rev B
