User's Manual

P.G. TM0032FE
4 - 1
SECTION 4. PROGRAMMING OPTIONS
4.0 PROGRAMMING OPTIONS
The A211 amplifier contains a number of options which are programmed before the unit
is installed, or may be adjusted during system installation or modification. They are set
in a default setting by PG before shipment. A summary diagram of these jumpers and
switches is affixed to the inside of the removable amplifier cover for use in the field, but
a larger view is shown herein (Fig 4-1) together with the following description of these
settings.
It is suggested that when jumpers are removed to break a circuit, that they be
reinstalled on one pin at the same location to keep them readily available if the option is
reselected at a later date.
4.1 DC CONTINUITY (DC)
DC Jumpers are provided to permit the amplifier to draw DC current from the coaxial
cable through any connector, and also to isolate output connectors from the DC if there
is NO need for downstream power and particularly if a DC grounded device is installed
in series with the amplifier. Removing the jumper breaks the DC connection to the
appropriate connector and is recommended practice.
The jumpers are labelled DCJ1, DCJ2 and EX. The first two provide DC continuity to the
J1 and J2 connectors and the EX is used when an optional DC connector is fitted for
use with an external DC adapter or supply. The local powered unit P/N 001-0211-003
has a jumper installed on EX and jumpers removed from DCJ1 and DCJ2.
NOTE:
Breaking the DC connection also disconnects the low frequency Fault code
from being transmitted along the cable from a downlink amplifier or power
supply.