Motorola STARLINE SERIES Instructions d'exploitation télécharger pdf (Page 42)

Installation 5-3

BLE*/* Installation and Operation Manual

Pedestal Installation

Pedestal installation is similar to aerial installation with the exception of temperature and

mounting procedure. In an aerial installation, the cable and amplifier are subject to the same

temperature. In contrast, pedestal installation provides a stable temperature environment for

the buried cable while subjecting the elevated amplifier to higher temperatures. The ADU, if

installed, functions the same as in an aerial installation, and does not require further attention.

See Section 3, “Amplifier Setup,” Amplifier Level Control for additional information.

Manual thermal compensation provided by the TDU can be inaccurate and result in signal level

changes with ambient temperature change. One approach to this problem is to select the least

amount of cable setting (low) on the TDU. This results in minimal gain change with

temperature. A preferred approach is to install a JXP-TH*C thermal attenuator while operating

the BLE*/* in the manual mode.

To mount the BLE*/* on a pedestal:

1 Remove the two 5/16-inch messenger clamps and bolts located on the long side of the

housing.

2 Locate the two 5/16-inch holes 4.0 inches center-to-center cast into the housing base.

3 Use the two 5/16-inch bolts to install the BLE*/* to the pre-drilled pedestal mounting plate

and torque to 10 to 12 ft-lbs.

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 48 49

Pas de commentaire

Motorola STARLINE SERIES Instructions d'exploitation Page 42