User Manual

System Description RF-Baton! Transmitter Controller Installation and Operation
2-12 6880497G01-B June 1999
• The Page Control Receive Manager (PCRM) receives message data from the OPPM,
calculates the exact message launch time, and queues the message for transmission. The
calculated launch time is based on the launch time received from the RF-C! controller as
well as transmitter and transmitter controller characteristics. The PCRM also monitors
station paging status, and is responsible for enabling and disabling paging based on
station status.
• The Page Control Launch Manager (PCLM) directs the message data to the proper data
router based on the transmission subchannel. The PCLM depends on the launch time
calculated by the PCRM.
• The data router (DRT1) converts the message data specified by the PCLM into the PnP
format and outputs the data to the transmitter through the PnP interface. There is a
separate data router for each transmission subchannel on the system.
GPS Tracking and Simulcast
The BCM acquires and maintains GPS lock from the GPS receiver during normal operation in
order to provide optimum simulcast capabilities. GPS lock is required because the RF-B!
transmitter controller time is synchronized with GPS time to maintain a common timebase
across multiple paging stations, which allows simulcast capability. If the GPS lock is lost, the
RF-B! transmitter controller uses the timing from the UHSO to continue simulcast operation
for up-to-96 minutes while attempting to reestablish the GPS lock.
Figure 2-6: GPS and Simulcast Interaction with Outbound Message Dataflow
Outbound
Data
Paging
Protocol
Manager
Page
Control
Receive
Manager
Page
Control
Launch
Manager
Router
PnP Bus
to
Input Data
from RF-C!
Controller
over the
Ethernet
Transmitter
Station
Paging
GPS
Data
Stream
GPS
GPS
Manager
Simulcast
Manager
Status
UHSO
Control
GPS Initialization, Acquisition,
Synchronize BCM Time
with GPS Time
Receiver
Status