Murata Electronics North America CCT24 Manual Do Utilizador
Page 47 of 90
CCT24
Bank 1 holds configuration parameters to be input to the base only. The base passes these parameters to
the remotes as needed. The exception is the ARQ_AttemptLimit parameter. If ARQ_Mode bit 1 is set to 1
at the base, the ARQ_AttemptLimit parameter can be set in the remotes and used.
the remotes as needed. The exception is the ARQ_AttemptLimit parameter. If ARQ_Mode bit 1 is set to 1
at the base, the ARQ_AttemptLimit parameter can be set in the remotes and used.
FrequencyBand - this parameter selects the frequency hopping subband. Nine subbands are available,
as shown below. Note that operation in France is limited to subbands 0x04, 0x05 and 0x07.
as shown below. Note that operation in France is limited to subbands 0x04, 0x05 and 0x07.
Subband
Channels
Frequency Range(s)
Notes
0x00
38
2409.55-2479.85 MHz
General purpose 38 channel subband
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
Polling
unlimited
manual
1
CSMA
unlimited
manual
2 (default)
TDMA dynamic slots
up to 16
automatic
3
TDMA fixed slots
up to 16
automatic
4
TDMA with PTT
up to 16 +
automatic
unlimited listen only
BaseSlotSize - This parameter set the maximum number of user data bytes that the base can send on a
single hop. This value must be set by the user for all access modes. The default value is 50 bytes.
single hop. This value must be set by the user for all access modes. The default value is 50 bytes.
LeasePeriod - this sets the duration in seconds for leases that remotes receive from the base. If a period
of zero is specified, then lease 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.
of zero is specified, then lease 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.
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, attempts to send the data will be made, after which the message is discarded. In
redundant broadcast mode, each broadcast message is sent exactly ARQ_AttemptLimit times. No ACKS
are sent or expected. The following bit options control this function:
expected from the receiving radio for each message addressed and sent to it. If no ACK is received, up to
ARQ_AttemptLimit, attempts to send the data will be made, after which the message is discarded. In
redundant broadcast mode, each broadcast message is sent exactly ARQ_AttemptLimit times. No ACKS
are sent or expected. The following bit options control this function:
bits 7..2
Not used
bit 1
If set to 0, the base can pass a new ARQ_AttemptLimit to the remotes
If set to 1, the remotes use their own ARQ_AttemptLimit in Bank 1
If set to 1, the remotes use their own ARQ_AttemptLimit in Bank 1
bit 0
If set to 1, ARQ mode is enabled for Protocol mode; the base will send broadcast packets ARQ_AttemptLimit
times instead of once. If set to 0, broadcast packets are sent once
times instead of once. If set to 0, broadcast packets are sent once