Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
Table 9-12. Line Board Setup Jumpers and Switch Setting
Reference
Designation
Component Function
J10 Jumper Used to set Rx Impedance of 4W systems.
Can be set to 50, 75, 100 or 130 Ohm
s.
J20 Jumper Used to set Tx Impedance of 4W systems or the Tx & Rx Impedance of
2W sy
stems. Can be set to 50, 75, 100 or 130 Ohms.
J1-J9 Jumper Adjusts capacitive component of line impedance.
Refer to the Hy
brid Tuning procedure.
J13-J15, Jumper Adjusts inductive component of line impedance
J17-19, J21
and J22
Refer to the Hybrid Tuning procedure.
R1 Potentiometer Adjusts resistive component of line impedance.
Refer to the Hybrid Tuning procedure.
S1 Switch A 6-position rotary switch, which allows the selection of various resistors
to adjust the resistive component of the line impedance.
Refer to the Hy
brid Tuning procedure.
J28 Jumper Install this jumper in the TOP position if the attenuator module is not
equipped. Install it in the BOTTOM position if the attenuator module is
equipped.
J25 Jumper Selects 4W mode or Loopback mode.
J11, J12 and
J23
Jumper All three of these jumpers must be set to 2W to select 2W mode.
All three of these jumpers must be set to 4W to select 4W mode.
R10 Potentiometer Adjusts the Rx Output level. See Hybrid Tuning procedure.
TP1 Test point Connect the low or common side of test equipment to this test point when
monitoring TP2 or TP3.
TP2 Test point Tx monitor high, test point.
TP3 Test point Rx monitor high, test point.
J16 Jumper Used for factory testing. In normal operation this jumper is not installed.
9.6.5 ATTENUATOR BOARD SETTINGS
The Attenuator Board has one toggle switch (SW1) that must be set for proper system operation. The
toggle switch SW1 selects either Normal or Loopback operation. In Normal operation, set the switch to
the UP position. In Loopback operation set to switch to the DOWN position. The switch location is
shown in Figure 9-12, and is accessible when the Attenuator Board is plugged into the chassis.
RFL 9785 RFL Electronics Inc.
May 16, 2011 9-33 (973) 334-3100
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