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Bulletin 639519 • Revision D May 2009 2-1

Section 2

Teletilt

RET System Components In Detail

2.1 Actuator (Motor Drive)

ATM200 series actuators house a brushless stepper motor system. This system enables communi-

cation from both the actuator to the controller (identifying its position and angular tilt setting) and the

controller to the actuator (to make angular tilt adjustments). The brushless approach was adopted for

high reliability and low EMI.

The actuator can be ﬁ tted on a Teletilt compat-

ible variable electrical downtilt antenna in service

or before antenna installation. Installation of the

retrofitting actuator to an antenna in service

usually does not require antenna realignment

or disconnect of the main feeder cabling. This

feature allows the operator maximum ﬂ exibility

to observe a site. Andrew’s current ATM200-002

and ATM200-A20 actuators supersede ATM200-

001. All actuators can move the full range in less

than 25 seconds.

• ATM200-001 is shown in Figure 2-1.

• ATM200-002 is shown in Figure 2-2.

• The ATM200-A20 is similar in appearance

to ATM200-002.

• The E-ATM300 is not shown. This actuator

uses the Ericsson proprietary protocol.

When installing an actuator to an antenna, verify

the following:

• Actuator should be set at the angle shown on

the fully extended downtilt rod.

• Actuator has not been damaged.

• Locking nut, washer, and AISG cable area

are hand tightened.

• Maximum tilt is displayed in the center of the tilt viewing window after installation.

• Several antenna models will show the minimum tilt instead of the maximum tilt:

TMZXX-6516-VTM, -R2M, -A2M

TMZXXX6516-VTM, -R2M, A3M

HBXXX-6516DS-VTM, -R2M, -A3M

Figure 2-1. ATM200-001 Actuator (Motor Drive).

Figure 2-2. ATM200-002 Actuator (Motor Drive).

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Andrew ATC200-Lite Guía para resolver problemas Pagina 15