3
FOCN
Instruction Manual
Description
The Blonder Tongue FOCN is a high quality, cost effective, bidirectional CATV node featuring the latest optical receiver
technology. It is designed to operate with optical input levels ranging from -8dBm to +2dBm. The FOCN has a forward
bandwidth of 54-1000 MHz and 5-42 MHz Return with Optional Return Laser Transmitters.
FOCN Model Table
Model
Stock No.
Description
FOCN-S4S-201
7420-1
Rx Only (No Return)
FOCN-S4S-204
7420-4
Rx with 1310 nm, 4.8 dBm DFB Laser
FOCN-S4S-205
7420-5
Rx with 1550 nm, 4.0 dBm DFB Laser
The FOCN comes with an AC adapter which operates on an input of 100-240 VAC 50/60 Hz and an output of 12 VDC at
1.25 Amps.
Installation/Environmental Considerations
The FOCN is specified to operate from -10°C to +55°C. It should be mounted in an adequately ventilated area. For a
longer life span, it should not be operated at the upper limit of the temperature range. Installation in wet areas or areas
of extremely high humidity should be avoided. The FOCN should not be installed in areas that are accessible to children.
The FOCN may be installed and operated in any position on a flat surface. The unit has two slots in the bottom plate to
accommodate mounting hardware. The unit should be mounted by sliding over one screw and then tightening the other
screw. If mounting requires a wood screw, use #6 or #8 (maximum) pan-head sheet metal screws. These are commonly
available at hardware stores. If mounting with a machine screw (to tapped holes), use 6-32 pan-head screws.
Optical Connectors
The optical connectors are available in SC/APC type terminations.
Powering
Apply only +12 VDC to either the “F” connector closest to the top cover of the unit, or through a power inserter in series
with the Main RF output connector, the “F” connector closest to the outside edge of the housing.
NOTE:
the center conductor of the “F” connector is “+” and the shield is ground.
