CommScope ATC300-2000 - Manual (Page 26)

Section 1–System Description ATC300-1000/2000 Teletilt ® RET System
1-10 August 2014 Bulletin 639544 • Revision L
1.3 Actuator (Motor Drive)
The ATM200 series actuator (motor drive), shown in Figure 1-11, houses a brushless stepper motor
system. This system permits the actuator to transmit data to the controller identifying its position and
angular tilt setting, as well as receive data from the controller for angular tilt adjustments to be made.
The brushless approach was adopted for high reliability and low EMI.
Features/benefits include:
• Actuator can be installed on Teletilt compat-
ible variable electrical downtilt antennas
that are already in service
• Antenna models are available with the
actuator factory installed
• A single actuator adjusts both vertical and
dual polarized single band antennas. Tilt
adjustments are made simultaneously to
both +45°/–45° polarizations
Dual band or quad port antennas (possess-
ing two independently adjustable variable
downtilts) require two actuators—one for each downtilt adjuster. Likewise, three actuators would
be required for a tri band or six port antenna
• Actuator is enclosed in a gasket-sealed, weather resistant container. Container provides a drain
hole to allow drainage of condensed moisture
• Adjustments are complete in less than 15 seconds from the time the command is received
• Weighs less than 0.3 kg; operating temperature range is –40° to +70° C
Andrew Solutions recommends that the transmit RF power be turned off
when working around the antenna to field retrofit an actuator, and that all
applicable safety procedures be followed. Bulletin 639552, Field Replacement
of Factory Installed Actuators, provides complete instructions.
• AISG Reset Capability
The ATC 300-1000/2000 and ATC 200-1000 controller supports two AISG modes, simultaneously,
on the same RET system. Andrew ATM200-002 actuators are factory set to operate in AISG 1.1
mode, but can be switched to operate in AISG 2.0 using the controller’s AISG Control Tools (Sec-
tion 11.5).
Figure 1-11. ATM200 Actuator (Motor Drive)
Showing Input Connector.
Male
Input
Port