Data Services; Adaptive Power Control - Futurecom PDR8000 Manual

row of the Multi-NAC table. Console-originated transmissions initiated via DFSI may either
provide the specific Tx NAC to be used as part of the transmission information, or the console
may defer to the PDR8000's configured Tx NAC by specifying a Tx NAC of $F7E.
It may be desired that console-originated transmissions utilize the previously received NAC
code, to allow a dispatcher to reply to the previous call. This functionality is provided if the
channel is configured to Tx Last Rcvd NAC. For that configuration, for a configurable duration
of time since the last received call, the PDR8000 sends outbound wireline-originated
transmissions encoded with the NAC of the last received message. (A DFSI-connected console
may utilize this functionality by specifying Tx NAC of $F7E, or may override this behavior by
providing a specific Tx NAC as part of the transmission information.)
6.7 D S
ATA ERVICES
PDR8000 is an infrastructure device capable of supporting Motorola's data services including
GPS Location services, Text Messaging services, Encryption services, and subscriber Over-
The-Air Rekeying (OTAR). While PDR8000 is not actively involved in these services, it allows
the data services to pass through, providing needed end-to-end delivery through its bearer
services.
When sending data originating from the infrastructure, a PDR8000 can be configured to send a
certain duration of Idle packets after the last infrastructure-originated data message is sent.
This configurable Wireline Data Drop-out Delay prevents rapid key/dekey sequences of the
PDR8000 during a data session.
A PDR8000 can be configured to provide local repeat functionality for Packet Data services.
This capability is useful in remote deployment scenarios where subscriber units need to pass
data to each other without involvement of a data server/infrastructure (e.g. Fireground
deployment).
Data Services are supported on V.24 wireline interface but not on DFSI over Ethernet wireline
interface.
6.8 A
DAPTIVE
A critical factor in the operation of portable radio units is the ability of their batteries to last for a
full shift, or longer. While improvements in battery technology continue to be developed, there
are also methods for the fixed-end equipment of a radio system to aid the portable unit in
achieving battery savings.
The concept of Adaptive Power Control enables the PDR8000 (and other equipment it may be
connected to, e.g. comparator) to evaluate the inbound signal received from subscriber units
(namely BER and RSSI) and provide that information back to the sourcing subscriber unit at the
end of its transmission. The subscriber unit uses this information to determine whether
subsequent transmissions can be made at a reduced power level. This allows the subscriber
unit to operate at full power when far from the repeater site, and at a reduced power level as it
comes into a strong signal coverage area. By reducing the subscriber unit's transmit power
when possible, battery savings are realized.
2021-11-15
P C
OWER ONTROL
PDR8000® Portable Digital Repeater Product Planner
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