Module Descriptions, RFL 9508D RF Section
7.7
RX FILTER
Figure 7-12. RFL 9508D Rx Filter Board
7.7.1
DESCRIPTION
The function of the Rx Filter is to prevent harmonics and noise from the power line that is out of the
bandwidth of the filter from coming into RFL 9508D. The bandwidth of the Rx Filter can be set to
either 8kHz or 16kHz using two programmable jumpers on the board. The filter center frequency is
tunable from 24kHz to 496kHz using programmable jumpers. The outer edges are 20kHz and 500kHz.
The 8kHz bandwidth is used for one or two RF channel operation and the 16kHz bandwidth is used for
three or four RF channel operation.
This filter does not provide the majority of selectability for the 9508D. It removes only some of the
undesirable signal spectrum. As such, it does not need to be set any narrower than 8kHz, even for
single channel 2.5kHz operation.
RFL 9508D UCC
RFL Electronics Inc.
December 1, 2010
7-15
(973) 334-3100