User's Manual

Table Of Contents
2-78
BreezeACCESS 4.0 Operations and Administration
Manual Revision: 1.01
If the ISM hopping sequence is used (ISM US FCC or ISM
International), the number of hopping frequencies is 79.
! Dwell Time – Applicable only when the ACSE Option is disabled.
When the ACSE Option is enabled this parameter is not applicable
and the dwell time is the ACSE Dwell Time, set to a fixed value of
60 milliseconds (see page 2-58).
! ACSE Option – see page 2-40
! Synchronization Signal Source – Defines the source of the
synchronization signals. The possible selections are:
" GPS Antenna or Internal
" Local (from other GU)
When using a single GU, it should always be configured to GPS
Antenna or Internal.
When using several daisy-chained units and a GPS antenna is
connected to the first (“Master”) unit, than ALL units should also be
configured to GPS Antenna or Internal.
When using several daisy-chained units without a GPS antenna,
than the first (”Master”) unit that generates the self-synchronization
signals for all units unit should be configured to GPS Antenna or
Internal. All other units (“Slave units”) that get the synchronization
signals from the “Master” unit should be configured to Local (from
other GU).
The default is GPS Antenna or Internal.
Alarm Parameters (GU)
The GU module serves also as the alarms control unit for the
BreezeACCESS system and auxiliary equipment. It has dry contact
connections to 4 external alarm inputs (Alarm In 1 through Alarm In 4),
that turn on upon contact closure. It also receives alarm indications
from BreezeACCESS power supply module (Alarm In 7 through Alarm
In 10), that turn on to indicate a power failure or over temperature
problem in any of the two optional power supplies. PS1 alarms refer to a
power supply module inserted in the left-most slot of the chassis. PS2
alarms refer to a power supply module inserted in the right-most slot of
NOTE:
The values of the ACSE Option and Dwell Time (if the ACSE Option is disabled)
parameters must be the same for all GPS modules and Access Units in the system to
enable synchronized hopping.
WARNING:
Do not connect a GPS antenna to the BS-GU module when the selected
Synchronization Signal Source is Local. This will cause collisions of signals and
may damage the equipment.