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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. 

Содержание FOCN Series

Страница 1: ...es Inc All rights reserved Specifications are subject to change without notice Trademarks are the property of their respective owner FOCN Series Fiber Optic Compact Node Model Stock No FOCN S4S 201 7420A 1 FOCN S4S 204 7420A 4 FOCN S4S 205 7420A 5 Status Date Document No Issue No Author Active September 28 2010 651215000C 3 KK Obsolete May 15 2009 651215000B 2 KK ...

Страница 2: ... into the end of a fiber on a power device with ANY sort of magnifying device This includes microscopes eye loupes and magnifying glasses This WILL cause permanent irreversible burn on your retina Always double check that power is disconnected before using such devices If possible completely disconnect the unit from any power source If you have questions about laser safety procedures please call B...

Страница 3: ... 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...

Страница 4: ...r with OMI 3 2 77 NTSC channel loading to 550 MHz digital loading to 1000 MHz 6 dB below analog Electrical Mechanical Dimensions 3 H x 6 D x 2 1 H Weight 12 oz Operating Temperature Range 10 to 55 C temperature at the mounting plate Enclosure IP Rating IP20 Powering 12 VDC via external Power Supply included DC Ripple 50 mV Power Dissipation with return TX 7 W Return Optical Transmitters Specificat...

Страница 5: ...55 MHz to 550 MHz and digital loading from 550 MHz to 1000 MHz at 6dB below analog The RF levels are measured at 547 25 MHz Although the node will operate at optical input levels as high as 2 dBm there is little improvement in the C Nperformance of the node at optical input levels above 0 dBm For optimum distortion performance it is recommended that the optical input to the node be kept at or belo...

Страница 6: ...V actual after the attenuator With a test carrier present at the port 19 dBmV max measure its level at the return 20 dB test point Adjust the pad for a 20 dB test point reading of 11dBmV return input External Test Points The FOCN has three external test points The received Optical Power test point is calibrated at 1V per mW 1310 nm it should be measured with a high impedance voltmeter This test po...

Страница 7: ...N is 0 5VDC to 0 9VDC approx 3dBm to 0 5dBm Operation down to 8dBm is feasible with reduced performance If the Fiber run is less than a few kilometers then the optical signal must be lowered before the system can operate cor rectly Failure to lower the signal into the operating range of the receiver may cause an overloaded or distorted picture The easiest way to lower the signal is to use an optic...

Страница 8: ...he tissue with alcohol 3 First clean the sides of the connector ferrule Place the connector ferrule in the tissue and apply pressure to the sides of the ferrule Rotate the ferrule several times to remove all contamination from the ferrule sides 4 Now move to a clean part of the tissue Be sure it is still saturated with alcohol and it is still four layers thick Put the tissue against the end of the...

Страница 9: ...9 FOCN Instruction Manual Notes ...

Страница 10: ...10 FOCN Instruction Manual Notes ...

Страница 11: ...re registered trademarks of Motorola Corp Blonder Tongue Laboratories Inc Limited Warranty Blonder Tongue Laboratories Inc BT will at its sole option either repair or replace with a new or factory reconditioned product as BT may determine any product manufactured by BT which proves to be defective in materials or workmanship or fails to meet the specifications which are in effect on the date of sh...

Страница 12: ...One Jake Brown Road Old Bridge NJ 08857 1000 USA 800 523 6049 732 679 4000 FAX 732 679 4353 www blondertongue com ...

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