Maintenance Handbook

SBS-800 Series Operator & Planned Maintenance Handbook
Chapter 4: Switch ON, OFF & Emergency Stop
KH-1601-2 Issue 6
Page 30 of 80
4.4 EMERGENCY ANTENNA STOP
In an emergency, antenna rotation and system transmission can be stopped using ANY of the
following mechanisms.
STOP
ANTENNA
ROTATION
USE ANY
OF THE
FUNCTIONS
SHOWN
RDU keyswitch: Place the Antenna Rotation keyswitch
on the front of the Radar Distribution Unit into the OFF
position.
As an additional safety precaution, when in the OFF
position the key can be removed.
Keyswitch on door of
RDU
Man Aloft Switch (MAS): Place the externally mounted
masthead Man Aloft switch to the OFF position.
This has the same effect as using the Antenna Rotation
keyswitch noted above.
Man aloft switch
Optional Service Display: RadarView software.
Please refer to the Service Display handbook reference KH-1604 for full operator
instructions.
When the system is being operated via the
service display (software must be On-line),
select the Emergency Stop button.
When activated, the RadarView software
EMERGENCY STOP function initiates an
emergency stop confirmation box which when
acknowledged causes the Radar Distribution
Unit to power down the transmitter(s) and sets
the invertor to “Stopped”.
Example of Manage Radar window
in RadarView program
CAUTION:
This EMERGENCY STOP function is DISABLED when the Service Display is
OFF-LINE.
EMERGENCY STOP - WHAT HAPPENS?
When the Antenna Rotation or Man Aloft switches are set to OFF or if the Emergency Stop software
function is activated, ALL AC power to the transceiver/gearbox is isolated thus stopping antenna
rotation and RF transmission.
SYSTEM ISOLATION
Please refer to Section 4.5 for details on isolating the system from the AC mains supplies for
maintenance purposes or working aloft.
WARNING
AC PRESENT WITHIN THE RDU
When any of the emergency stop functions are used, AC voltages are still present within the RDU.
SYSTEM ISOLATION
The Emergency Stop procedure(s) MUST NOT be used as a primary means of system isolation for
maintenance procedures or working aloft.
The system must be fully isolated before attempting any maintenance procedure.
ANTI-CONDENSATION HEATER SUPPLY
The Anti-Condensation Heater (ACH) supply is not controlled or isolated by any of the processes
noted above.