Power Line Carrier
GARD 8000 SYS RFL Electronics
April 23, 2015 10-37 973.334.3100
Table 10-17. Function of DIP Switches SW1 and SW2 on Power Amp Board
Phase Limit Setting:
The 50W Power Amplifier will shut down if a preset Phase Angle is exceeded.
The factory set threshold is 60 degrees. SW1-1 through SW1-8 can be set as
follows: Note that SW1-2, SW1-4, SW1-5 and SW1-6 are not used.
Phase Detector Set Point:
These DIP switches set the voltage threshold for the Phase Limit Setting. The
Phase limit circuit will not operate if the voltage falls below the preset. SW2-1
through SW2-4 can be set as follows:
Overvoltage Detector Set Point:
The 50W Power Amplifier will shut down if the output voltage exceeds the
preset threshold. SW2-5 through SW2-8 can be set as follows:
Note that the Phase Detector circuit will also shut down the Power Amplifier if the output voltage is
above the set threshold and the output current is very low (well below 200ma).
10.8.13.2 SETTING JUMPERS ON THE TX FILTER
The Tx Filter consists of two PC boards that are mounted at right angles to each other and are
supported by an aluminum frame. The Tx Filter has a total of 44 jumpers that must be configured for
proper system operation. Two of these jumpers (J1 and J45) are used to select the bandwidth of the
filter which can be either 8kHz or 16kHz. Jumper J44 is used for system testing, and the other 41
jumpers are used to tune the center frequency of the filter from 24kHz to 496kHz. The outer edges are
20kHz and 500kHz. Tuning the filter is done from the 9508 TX Filter Programming Sheet supplied by
RFL on request.
27 of the jumpers are located on the 107828-2 board. This is the board with the two large air core
inductors shown below with the location of the jumpers. The remaining 17 Jumpers are located on the
To Next Page
Loading...