Applications
2.6
RX FILTER PERFORMANCE
The Center Frequency and Bandwidth of the Rx Filter are set using programmable jumpers on the Rx
Filter module as described in paragraph 5.3.2.6. The Bandwidth can be set to 8 KHz or 16 KHz. The
Center Frequency can be set from 24 kHz to 496 KHz in 4 KHz increments. The Rx frequency must
also be programmed in the RF Setup section of the NMS as shown in Figures 4-22 and 4-24. For the
standard applications the RX filter is set to 8 KHz.
2.7
TX FILTER PERFORMANCE
The Center Frequency and Bandwidth of the Tx Filter are set using programmable jumpers on the Tx
Filter module as described in paragraph 5.3.2.2. The Bandwidth can be set to 8 kHz or 16 kHz. The
Center Frequency can be set from 24 kHz to 496 kHz in 4 kHz increments. The Tx frequency must
also be programmed in the RF Setup section of the NMS as shown in Figures 4-22 and 4-24. For the
standard applications the RX filter is set to 8 KHz
2.8
LINE BOARD
The Line Board is the interface between the RFL 9508D UCC and the line coupling equipment. It has
several jumpers and other controls that must be set for proper system operation. Refer to paragraph
5.3.2.4 for additional information.
2.9
SETTING LEVELS ON THE RFL 9508D UCC
Setting the levels on an RFL 9508D UCC is important for proper functionality. The levels are set
up in four stages.
Relative Levels Of Transmit Tones
Absolute Level Of Transmit Tone
Absolute Receive Level
Alarm level setting
They should be set in the following manner.
2.9.1
RELATIVE LEVELS OF TRANSMIT TONES
The output level from the transceiver is relative to a peak of +3 dBm0. The teleprotection tone is
always sent at this level. Even if teleprotection is not installed or used, this reference should be used.
1.
For an 8 KHz system, the signaling, voice and data attenuation are typically set to 6 dB below
the level of teleprotection tone.
Note: The signaling tone performs the functions of a guard tone or pilot tone.
2.
The test tone generator runs at +3 dBm0 and is controlled by the voice attenuator setting.
RFL 9508D UCC
RFL Electronics Inc.
July 1, 2007
2-10
(973) 334-3100