Murata Electronics North America DNT900 ユーザーズマニュアル
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©2008 by RF Monolithics, Inc.
E-mail: tech sup@rfm.com
DNT900 - 11/05/08
When the data rate is set to 500 kb/s, the firmware interlocks the transmit power level to 19 dBm (85 mW)
or less to comply with FCC regulations.
or less to comply with FCC regulations.
JoinPremit
- valid parameter on a base only. Controls whether remote nodes are permitted to join the
base. Parameter values are 0 = no joining permitted, 1 = remotes only may join, 2 = remotes or routers
may join (future function).
may join (future function).
UserTag
- this is a user definable field intended for use as a location description or other identifying tag
such as a “friendly name”.
4.2.2 Bank 1 - System Settings
01
00
FrequencyBand
R/W
1
0.. 1
01
01
AccessMode
R/W
1
0..4
01
02
BaseSlotSize
R/W
1
6..233
01
03
LeasePeriod
R/W
1
0..250
01
04
ARQ_Mode
R/W
1
0.. 1
01
05
ARQ_AttemptLimit
R/W
1
0..63
01
06
TDMA_MaxSlots
R/W
1
0..15
01
07
CSMA_Predelaty
R/W
1
0..255
01
08
CSMA_MaxBackoff
R/W
1
0..255
01
09
MaxPropDelay
R/W
1
0..255
01
0A
EpochMode
R/W
1
0..2
01
0B
CSMA_RemtSlotSize
R/W
1
1 ..255
01
0C
CSMA_BusyThreshold R/W
1
1..255
01
0D
RangingInterval
R/W
1
0..255
FrequencyBand
- this parameter sets the range of frequencies over which the radio will operate. Two
settings are defined: North America (902-928 MHz) and Australia-New Zealand (915-928 MHz).
AccessMode
- this sets the channel access mode that remotes will use to communicate with the base:
Access Mode
Description
Max # of Remotes
Remote Slot Size
0
CSMA polling
1024
manual
1
CSMA contention
1024
manual
2 (default)
TDMA dynamic slots
up to 16
automatic
3
TDMA fixed slots
up to 16
automatic
4
TDMA with PTT
1024
automatic
BaseSlotSize
- This parameter set the maximum number of bytes allocated to user messages and their
RF headers. This value must be set by the user for all access modes (default value is 20 bytes).
LeasePeriod -
this sets the duration in seconds for network address leases that remotes may receive
from the base. If a period of zero is specified, then lease and network address functions are disabled. The
minimum valid lease period is two seconds. Remotes will attempt to renew their leases at an interval
equal to half the lease period. For example, if the lease period is set to four seconds, remotes will renew
their leases every two seconds.
minimum valid lease period is two seconds. Remotes will attempt to renew their leases at an interval
equal to half the lease period. For example, if the lease period is set to four seconds, remotes will renew
their leases every two seconds.
ARQ_Mode -
this sets the ARQ mode for delivery of application messages. In ARQ mode, an ACK is
expected from the receiving radio for each message addressed and sent to it. If no ACK is received, up to
ARQ_AttemptLimit,
ARQ_AttemptLimit,
efforts to send the data will be made, after which the message is discarded. In redun-
dant broadcast mode, each broadcast message is sent exactly ARQ_AttemptLimit times. No ACKS are
sent or expected. The following bit options control this function:
sent or expected. The following bit options control this function:
Size in
Bank Loc'n
Name
R/W
bytes Range Default; Options
0x00 = North America;
0x01 = Australia, 0xFF = auto
2 = TDMA Dynamic Slots
20 bytes
5 s (0 to disable)
0 = ARQ, 1 = redundant broadcast
5 attempts
8 slots
0x03
0x0A
0x0D (3.8 mi, 6 km)
0 = use previous; 1 = increment
2 = random
50
20
0 (disable)
0x01 = Australia, 0xFF = auto
2 = TDMA Dynamic Slots
20 bytes
5 s (0 to disable)
0 = ARQ, 1 = redundant broadcast
5 attempts
8 slots
0x03
0x0A
0x0D (3.8 mi, 6 km)
0 = use previous; 1 = increment
2 = random
50
20
0 (disable)