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FOCN-S4S-201 Fiber Optic Compact Node 28 dBmV RF Output by Blonder Tongue

FOCN-S4S-201 Fiber Optic Compact Node 28 dBmV RF Output by Blonder Tongue

FOCN-S4S-201 Fiber Optic Compact Node 28 dBmV RF Output by Blonder Tongue

  • Brand
    Blonder Tongue
  • SKU
  • Weight
    1.00 lbs
  • Warranty
    1 Year
  • Condition
  • Status
Product Questions? Ask Our Experts!
Out of stock
Fiber Optic Compact Node, 28 dBmV RF Output, 1310/1550 nm, 1000 MHz, SC/APC Connectors
  • Brand
    Blonder Tongue
  • SKU
  • Weight
    1.00 lbs
  • Warranty
    1 Year
  • Condition
  • Status
Questions? Ask our experts!


The FOCN-20X Series is a low-cost, compact 2-way node designed to deliver the full array of CATV services presently available and those planned for the future. These services include video (analog and digital), high speed data and telephony. The FOCN has applications for the direct fiber transmission of CATV RF signals in MDU, industrial, government and educational facilities, or wherever a high performance compact indoor node is required. The unit is constructed with high quality components enabling it to meet or exceed its performance specifications in an uncontrolled indoor environment with wide temperature variations. The FOCN-20X is available in 3 models. All models have at their core a 1310/1550 nm optical receiver with exceptional optical sensitivity and 28 dBmv RF output at an optical input of -1dBm. The differences between the models pertain to return path operation. Models are available in both 1-way or 2-way configurations. The 2-way models are available with either a 1310 nm or 1550 nm DFB laser. All 2-way models have a return RF bandwidth of 5-42 MHz. Other standard features include LEDs for optical input and laser status. Powering is via a 12 VDC supply and can be accomplished in either of two ways. To power locally, a separate power connector marked “+12 VDC power in“, is provided. Alternately, the unit can accept 12 VDC from its RF output connector, thus permitting remote powering by diplexing the 12 VDC supply onto the RF output

  • Compact Size
  • 1000 MHz Forward Bandwidth, 5-42 MHz Return Bandwidth(on 2-way models)
  • Tri-color LED for Optical Input Status
  • LED Indicator for Return Laser Status
  • 12 VDC Powering Versatility
Forward Optical Receivers
RF Output
Frequency Range (+/- 1.0 dB): 54-1000 MHz (NTSC)
Output Level (@ -1 dBm optical input):*
+28 dBmV (@ 550 MHz)
Return Loss: 14 dB min., 16 dB typical
Impedance: 75 Ohm
CNR (@ 0 dBm optical input):* > 53 dB
CSO (@ -1 dBm optical input):* > 63 dBc
CTB (@ -1 dBm optical input):* > 65 dBc
Slope: 0dB
RF Test Point (forward) -20 dB; Type F
Wavelength: 1280 - 1610 nm
Optical Input Power Range: +2 dBm to -8 dBm
Return Loss: > 50 dB with APC connector
Optical Input Power Test Point:
1 V/mW +/- 0.1 V
Optical Connector: SC/APC, 8° APC
* NOTE: Typical levels @ 0 dB slope to 1000 MHz with 8dBm
optical transmitter 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
DFB Versions RF Input
Frequency Range: (+/- 1.0 dB) 5-42 MHz (NTSC)
RF Test Point (return): -20 dB (external); Type F
Return Loss (with Return TX Installed):
> 16 dB within the Return Band
Return Path NPR: 15 dB min. of NPR Range
FP: 37 dB NPR Threshold
DFB: 41 dB NPR Threshold
Optical Output:
DFB = 4.8dBm (3mW) @1310nm
DFB = 4.0dBm (2.5mW) @1550nm
Return Loss: > 50 dB with APC connector
Optical Connector SC/APC, 8° APC
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Our main goal is to ensure your complete satisfaction with our service and products. If, for any reason, you are not 100% satisfied with your purchase, you can return it within 30 days of the purchase date for a full refund. Our 30-day money back guarantee applies to all of the products we sell, except for: TVs and monitors 20" and larger, Special Order merchandise, or any item indicated as non-returnable. Shipping is not refundable. Prior to returning your purchase, a Return Merchandise Authorization (RMA) number will be provided to you.

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If the item was sent back to us for an exchange, please allow 3 - 5 business days for the replacement to be processed.

No Returns/Exchanges on the following:

TVs and monitors 20" and larger
Special Order merchandise
Any item indicated on the website as non-returnable

For more information see our official Return Policy

  • Shipping Info
    We offer free ground shipping on every purchase of $300 and more for US and US territory. We deliver worldwide.
  • Payment Methods

  • Return Policy
    We Offer a 30-Day Money Back Guarantee