User's Manual

P.G. TM0040AE
4-1
SECTION 4. PROGRAMMING OPTIONS
4.0 PROGRAMMING OPTIONS
The 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 P.G. before shipment. A summary diagram of these jumpers 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)
A DC jumper is provided to permit the amplifier to isolate J1 from 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 from connector J2 to J1, and is
a recommended practice. The jumper is labelled “DCJ1 DCJ2”. The jumper provides DC
continuity between J1 and J2 connectors.
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.