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NK4200 Mini OTDR for Live Fiber Testing

Q: Which NK4200 model is intended for live-fiber testing?

The published F1–F4 options are described for live-fiber work at 1550, 1610, 1625 or 1650 nm respectively. D1 is explicitly described as no live test. The exact filtered port and input limit must be confirmed before connection.

Q: Why does the NK4200 D1 table say 1330/1550 nm?

That is the value printed in the supplied source image and is preserved rather than silently changed. Buyers should obtain written confirmation of the intended first wavelength before ordering.

Q: Can every NK4200 tolerate +5 dBm incoming power?

No. The published limits vary by option: the 1550 and 1650 nm notes state ≤+5 dBm, the 1625 nm note states ≤0 dBm, and the 1610 nm note states <0 dBm. Confirm the actual configured unit.

Q: Is the NK4200 suitable for dual-wavelength dark-fiber testing?

The D1 option is the listed dual-wavelength non-live configuration. Verify its printed wavelength specification and connector before the purchase order is finalized.

Q: What connector options are published for the NK4200?

The product parameter image lists SC/UPC or SC/APC. State the required polish clearly and do not directly connect UPC and APC interfaces.

Q: How should distributors remotely inspect an NK4200?

Request a continuous video showing serial number, model code, port and an acquisition on a documented reference link. Obtain the original trace file and confirm incoming-power conditions for live testing.

Q: Does the NK4200 125 km range guarantee measurement over 125 km?

No. It is a selectable test range. Usable reach depends on wavelength, attenuation, events, pulse width and averaging.

Q: What must appear on an NK4200 B2B quotation?

Include F1–F4 or D1 code, published wavelength, dynamic range, connector polish, quantity, destination, accessories, calibration documentation, warranty, packing and acceptance procedure.

Product Description

NK4200 Mini OTDR for Live-Fiber and Single-Mode Maintenance

The NK4200 is a compact single-mode OTDR series with maintenance-wavelength options for active-network work and a dual-wavelength non-live option. LinkFiber supplies configuration-based quotations for distributors, resellers and field-service buyers.

Published Configuration Options

Code	Published wavelength	Dynamic range	Source description
F1	1550 nm ±20 nm	24 dB	Live-fiber capability
F2	1610 nm ±20 nm	24 dB	Live-fiber capability
F3	1625 nm ±20 nm	24 dB	Live-fiber capability
F4	1650 nm ±20 nm	24 dB	Live-fiber capability
D1	1330/1550 nm as printed in the source table	26/24 dB	No live test

Source-value note: The supplied product image prints “1330/1550 nm” for D1. This is reproduced without silent correction. Confirm the intended first wavelength in the manufacturer-backed quotation before ordering.

Technical Specifications

Fiber	G.652 single-mode
Event / attenuation dead zone	1.5 m / 8 m
Test ranges	100 m / 300 m / 500 m / 1.25 km / 2.5 km / 5 km / 10 km / 20 km / 40 km / 80 km / 125 km
Pulse widths	5 / 10 / 20 / 30 / 50 / 80 / 100 / 200 / 300 / 500 / 800 ns; 1 / 2 / 3 / 5 / 8 / 10 / 20 μs
Ranging accuracy	±(1 m + sample interval + 0.005% × test distance)
Linearity	±0.05 dB/dB
Maximum sample points	≥20,000
Maximum sample resolution	≤0.03 m
Loss resolution	0.01 dB
Refractive index	1.00000–2.00000
Connector	SC/UPC or SC/APC
Power	100–240 V 50/60 Hz adapter, output 5 V 2 A; 3.7 V 4000 mAh lithium battery

Published Live-Fiber Input Notes

1550 nm option: test fiber carrying 1310/1490/1577 nm signals, stated power ≤ +5 dBm.
1610 nm option: test fiber carrying 1310/1490/1550 nm signals, stated power < 0 dBm.
1625 nm option: test fiber carrying 1310/1490/1550/1577 nm signals, stated power ≤ 0 dBm.
1650 nm option: test fiber carrying 1310/1490/1550/1577 nm signals, stated power ≤ +5 dBm.

These are reproduced specifications, not permission to connect without confirming the exact port, network plan and safety procedure. D1 is explicitly described as non-live.

B2B Buyer Guide and Remote Verification

State F1, F2, F3, F4 or D1 on the order; “NK4200” alone is incomplete.
Provide active service wavelengths and measured/expected incoming power.
Confirm SC/UPC or SC/APC and never directly mate UPC to APC.
Request a continuous serial-number video on a documented reference setup plus the original trace file.
Agree calibration, language, included adapters, charger, case, warranty and acceptance limits before shipment.

Quotation and Related Products

Sample, lead time, packing and after-sales terms are confirmed in the quotation. Browse OTDR testers or send LinkFiber the active-network details.

FAQ

Q：

Which NK4200 model is intended for live-fiber testing?

A：

The published F1–F4 options are described for live-fiber work at 1550, 1610, 1625 or 1650 nm respectively. D1 is explicitly described as no live test. The exact filtered port and input limit must be confirmed before connection.

Q：

Why does the NK4200 D1 table say 1330/1550 nm?

A：

That is the value printed in the supplied source image and is preserved rather than silently changed. Buyers should obtain written confirmation of the intended first wavelength before ordering.

Q：

Can every NK4200 tolerate +5 dBm incoming power?

A：

No. The published limits vary by option: the 1550 and 1650 nm notes state ≤+5 dBm, the 1625 nm note states ≤0 dBm, and the 1610 nm note states <0 dBm. Confirm the actual configured unit.

Q：

Is the NK4200 suitable for dual-wavelength dark-fiber testing?

A：

The D1 option is the listed dual-wavelength non-live configuration. Verify its printed wavelength specification and connector before the purchase order is finalized.

Q：

What connector options are published for the NK4200?

A：

The product parameter image lists SC/UPC or SC/APC. State the required polish clearly and do not directly connect UPC and APC interfaces.

Q：

How should distributors remotely inspect an NK4200?

A：

Request a continuous video showing serial number, model code, port and an acquisition on a documented reference link. Obtain the original trace file and confirm incoming-power conditions for live testing.

Q：

Does the NK4200 125 km range guarantee measurement over 125 km?

A：

No. It is a selectable test range. Usable reach depends on wavelength, attenuation, events, pulse width and averaging.

Q：

What must appear on an NK4200 B2B quotation?

A：

Include F1–F4 or D1 code, published wavelength, dynamic range, connector polish, quantity, destination, accessories, calibration documentation, warranty, packing and acceptance procedure.

Inquiry

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