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© 2011 by RF Monolithics, Inc. E-mail: tech_sup@rfm.com DN-2400E User Guide - 08/05/11
can link. The Encryption key can be set over the air so it can be changed periodically if desired. Once an
encryption key has been entered, it can be changed but it cannot be read back.
Hop Duration - this sets the duration of the hop frame. The duration is set as a 12-bit value,
0.05 ms/count. Changing the hop duration must be followed by a MemorySave command to allow the
change to persist through a reset or power cycle. A HopDuration change takes effect immediately. Re-
motes will re-link following a HopDuration parameter change.
Device Mode - selects the operating mode for the radio: remote, base or router. Note that changing this
setting does not take effect immediately. It must be followed by a Memory Save command and then a
hardware reset.
TDMA Max Slots - this sets the number of slots that are allowed. In fixed slot mode, this allocates the
number of slots directly. In dynamic slot mode, this sets the maximum number of slots that may be gener-
ated regardless of the number of remotes that attempt to link with the base. Any remotes requesting reg-
istration after this limit is reached will be denied registration by the base.
Frequency Subband - a suitable frequency subband depends on geographical location. For example, the
default subband can be used in locations such as the US or Canada. Operation in France requires the
use of subbands 4, 5 or 7 as the 2.4 GHz frequency band for unlicensed radios is smaller in France.
Subband Channels Frequency Range(s) Notes
0 37 2409.3-2467.1 MHz General purpose 37 channel subband
1 17 2441.1-2467.1 MHz 17 channel subband, avoids 802.11b/g channels 1-4
2 17 2409.3-2416.6 MHz, 2451.2-2467.1 MHz 17 channel subband, avoids 802.11b/g channels 5-6
3 17 2409.3-2426.7 MHz, 2461.3-2467.1 MHz 17 channel subband, avoids 802.11b/g channels 7-8
4 17 2409.3-2435.3 MHz 17 channel subband, avoids 802.11b/g channels
9-10, also for use in France
5 21 2409.3-2441.1 MHz 21 channel subband, avoids 802.11b/g channels
11-13, also for use in France
6 21 2428.1-2461.3 MHz 21 channel subband, avoids 802.11 b/g channel 1
7 15 2409.3-2432.4 MHz 15 channel subband, avoids 802.11b/g channels
8-13, also for use in France
8 15 2433.9-2455.6 MHz 15 channel subband, avoids 802.11b/g channels
1-2 and 13
255 15 to 37 Auto Autoscan for remote to match base
Remote Authentication Mode - this parameter is set in the base. It controls how remotes are permitted to
join the network. Permitted values are:
0 = Any remote may join
1 = Authentication by base radio permission table
UserTag - this is a user definable field intended for use as a location description or other identifying tag
such as a “friendly name”.
