9 best fiber optic measurements

Product description

The Jonard Tools FLS-50 Optical Light Source is designed to provide 1310 nm or 1550 nm wavelengths for fiber optic testing. This optical light source is the perfect tool for providing a stable light source for single mode fiber measurements and works seamlessly hand-in-hand with our Fiber Optic Power Meter (part no. FPM-50). This optical light source features highly stable output power and wavelengths, four different modulation output frequencies (CW, 270 Hz, 1 kHz, 2 kHz) at 1310 nm and 1550 nm wavelengths, and a backlit LCD screen that provides a clear viewing display and is ideal for dark and low light applications. The optical light source has a highly durable design with flush buttons for ease of use and preventing dust from entering the unit, plus a shatter-resistant sleeve to protect the light source from falls or other damage. Includes: - Fiber Optic Light Source - FC Adapter - LC Adapter - SC Adapter - Cleaning Swabs - AA Alkaline Batteries (required for operation) - Storage Pouch

• WHAT'S IN IT: Fiber Optic Light Source, FC Adapter, LC Adapter, SC Adapter, Cleaning Swabs, AA Batteries, Storage Pouch
• HIGH DURABILITY DESIGN: Flush button design makes it easy to use and prevents dust from entering the unit plus shatter-resistant sleeve protects the light source from falls and other damage
• 4 MODULATION OUTPUTS: This optical light source has 4 output modulation frequencies (CW, 270 Hz, 1 kHz, 2 kHz) at 1310 nm and 1550 nm wavelengths for stable and reliable output
• BACKLIT LCD SCREEN: The LCD screen provides a clear viewing display and is backlit, making it ideal for viewing in dark and low light applications
• LIFETIME USE: Jonard Tools makes high quality tools that are designed to last a lifetime

User questions & answers

Question:	can i use it trough a 1x32 splitter
Answer:	It sits on your toilet so it will hold as much weight as your toilet does. The arms are just for getting up and down. If you have a comfort height toilet you will have to trim the blue covering about two inches for the arms to touch the floor.
Question:	What is the optical power output? (in mW or dBm
Answer:	23 inches. You don't need a lot of room.

Product description

OTDR

• Wavelength: 1310/1550nm
• Dynamic Range: 22/20dB
• Fiber Type: SM
• Peak Value of Laser: >=30mW
• Dead Zone of Reflection Event: 2m
• Dead Zone of Attenuation Event: 12m
  
  

Optical Power Meter

• Measurement Range: -70~+10dBm
• Wavelength Range: 800~1650
• Calibrated Wavelength: 850, 1300, 1310, 1490,1550, 1625nm
• Detector: InGaAs

Visual Fault Locator

• Wavelength: 650nm
• Output Power: >=10mW
• Mode: 0Hz, 1Hz, 2Hz
• Fiber Type: SM/MM

 Optical Light Source

• Emitter: FP-LD
• Wavelength: 1310/1550nm
• Connector: FC/PC
• Output Power:>=-5dbm

 

Other Features

• Measurement distance: 60km
• Editable file name and line number
• Support upgrade
• Quick boost, only take 2 seconds to test

 

Standard Packing

• OTDR Tester with FC/UPC Connector *1
• AC/DC Charger *1
• CD (software and user manual) *1
• User Manual *1
• Test Report *1
• Patch Cord and Adaptor *1
• Soft Carry Case *1

 

Data Download Reminder

• Up to200 test records will be stored in the tester, greater than this limit will be overwritten from back to front. Please download data timely

Laser Safety Reminder

• In any case, do not exposure eyes to the emitted light directly; The light is harmful to eyes

Connect the Fiber Reminder

• Before connecting the fiber, please make sure connector type matches and connector is clean so as to avoid inaccurate measurement or damage to tester.

• High Precision 4 in 1 Smart Single Mode OTDR Tester -- OTDR: 0-60KM; VFL: 10mw; OPM: -70~+10dbm; OLS: 1310/1550nm. Dead Zone of Reflection Event: 2m. It is a cost-effective yet powerful multi-functional fiber optic tester
• User-friendly UI and 4-inch Touch Screen Design – this OTDR tester adopts One Key Operation concept with user-friendly UI design, together with 4-inch 800*480 pixels Touch Screen, makes your work simple, intuitive and easy
• Large Battery Capacity -- 7.4v Li-ion Battery 4,400mAh, around 5,000 times of measurements, ensures long working time and suitable for long time field work
• Test Data Processing -- you can upload data to PC via USB port, further analysis or processing can be done via management software. Or you can save it as SOR format file or print in batch. Report include test condition, test curves, link loss, average loss, etc
• Wider Application – with SC FC ST LC adaptors provided in the packing, this OTDR tester is suitable for engineer construction and maintenance fault location of FTTx and access network

• 7-Inch outdoor-enhanced anti-reflectio touchscreen, 7.4V/10Ah Lithium battery.Integrated 10mw Visual Fault Locator.800~1700nm Optical Power Meter
• IP65 protection level, Event Dead zone as lower as 0.8meter,Muti measurement mode, support Touching LCD and pressing key.
• 1310nm+1550nm+1625nm Testing Wavelength and 37dB+36dB+36dB Dynamic Range,Max 160km(100mi) Distance Range.
• OTDR32F-T4-T4 is specially designed for that kind of application. It’s economic, having outstanding performance.
• Realtime measuring function,PC remote access and control function is available , which support the printing work of the measurement report.

User questions & answers

Question:	Does this come with the calibration certificate
Answer:	The Tall-Ette fits over a standard toilet and is adjustable several inches either way. My Dad is 5/8" and the toilet in his assisted living facility was a little bit low for him. This adds a few inches to the toilet so that he does not have to use so much arm strength to get back up. It has been a very durable and sturdy product. After a couple of months' use, we are still very happy with the purchase.
Question:	Does this device come with discount like the other models
Answer:	Yes to both. Pleased with it

Product features

Parameter

• Display:7" TFT-LCD outdoor-enhanced touch screen with LED backlight
• Interface:2×USB port+RJ45.
• Power:DC 12V,AC100V-240V/50~60Hz;Battery: 7.4V/10Ah lithium battery.
• Data Storage:12GB@>120,000 groups of curve.
• FC/UPC and SC/UPC adapter.
• Testing Wavelength:1310nm+1550nm+1625nm@Dynamic Range:37dB+36dB+36dB.
• Event/Attenuation dead-zone:1/8/8/8m;Linearity:≤0.05dB/dB.
• Testing Distance:Dead zone test, 1.3km~160km (0.8~100mi).
• VFL: 10mW，CW/2Hz/Power Meter: 800~1700nm@ -65~+5dBm.

7-Inch outdoor-enhanced touch screen

7-inch anti-reflection touch screen is sufficient for all your work,Accuracy,Convenient,Fast and easy to use,He is definitely a assistant you can do well.

The printing work

PC remote access and control function is available , which support the printing work of the measurement report.

Rich UI design

OP-OTDR32F series of OTDR with the industry's most simple and efficient operation, the main operating interface contains only 5 menu options. After optimizing the mode of operation, more in line with the user's daily habits; at the same time, unique in the industry of similar products in the key and touch screen full function mode of operation, making the operation more convenient, the tedious process of eliminating the frequent user moves the cursor.

Multiple interfaces

OP-OTDR32F-T4-T4 has Multiple interfaces,include 2 USB ports(Type A×1，Type B×1), 10mW@CW/2Hz Visual Fault Locator (VFL),800~1700nm Power Meter and OTDR interface,We also provide 1xFC/UPC and 1xSC/UPC adapter.

7.4V 10000mah lithium battery

7.4V 10000mah lithium battery can meet one day's work at arious environments.

Softbag

A good bag allows you to conveniently take OTDR anywhere and protect it well.

• OTDR Launch Cable is mainly used to make up the blind area of OTDR test. Standard boxes along with custom configurations for OTDR applications.
• There are no fusion joints in the center of optical fiber, small size, light weight and easy to carry. Pulse Suppressor, Launch Box, Delay Line, Installation/Testing, Training, Calibration.
• SC/UPC--SC/APC connectors, single mode (9/125), the length is 150m/300m/500m/1000m/2000m (optional).The loss is less than or equal to 0.5dBm/km. Box can house up to 2,000 meters of fiber.
• Compound latch for positive seal and easy opening with locking feature.It has excellent sealing performance.
• Compact and rugged packaging, portable for field use, prevents fiber damage and ensures accurate results.

Product features

SC/UPC-SC/APC Launch Cable Box

Description: The Etayson OTDR Launch Cable is designed to aid in the testing of fiber optic cable when using an OTDR to help minimize the effects of the OTDR's launch pulse on measurement uncertainty. Using a Etayson launch cable at the beginning of the fiber under test and a OLCB receive cable at the end of the fiber under test allows the ability to perform loss measurements on entire length of the fiber. The light weight unit measures only 6.25” in diameter and 1.25” high and includes a carabiner clip allowing the unit to be easily attached to belts, equipment straps and rack mounts. Units are available in lengths from 100 up to 2000 meters with a choice of a variety of connectors in order to connect to virtually all OTDR and patch panel ports. Optic fiber jump cable,OTDR Dead Zone Eliminator,Fiber Optic OTDR Launch cable box,fiber rings FC/SC/ST/LC(UPC/APC)

• 【High Precision,High Sensitivity and High linearity】-- Quick and Accurate. No waiting for preheating, just plug and play. +/- 3%uncertainty, -50dBm~+26dBm measurement, relative power calculation, calibration function.
• 【Widely Compatibility】-- built with 2.5mm universal connector for testing different sc, fc interferes fiber optic cables. making it more suitable for FTTH.
• 【Six Wavelength and Stable 30mW VFL Output】-- 850nm,1300nm,1310nm,1490nm,1550nm,1625nm and 650nm/30mW@30kM(18.6mi) Visual Fault Locator (VFL) with SC/FC Adapter. Covering most needs of CATV CCTV Communication Engineering maintenance.
• 【Practical, Compact Design and More Durable】-- Pocket size and light weight, Convenient Handy Size(17*8.5*3.1cm/6.7*3.3*1.2inch), easy to use; Rubber Outshell and Sturdy Oxford fabric case, increased the protective properties for field work, Miniature chassis protection design prevents damage caused by accident drop,and easy to bring with large screen and LED backlight; Low battery consumption,2000mah Li-ion Battery provide 50-200 working hours for continuous operation.
• 【Friendly user interface Design】-- a distinct result or information display ensures the satisfaction of user experience;The automatic shutdown function can be chosen; low voltage function display notifies you the battery is low; the user auto-calibration function will help the new users to adjust the measurement.

User questions & answers

Question:	Hola, viene con certificado de Calibracion
Answer:	Don't know the exact dementions, but I would say about the same as average toilet seat.
Question:	What is the greatest distance at which you have seen the VFL
Answer:	Not sure of elevation since don't have anymore but it was very comfortable to sit on (does not require additional toilet seat). This was great because it could go on top of existing toilet seat and I didn't have to remove the current seat to install this one. Easy install.
Question:	I noticed on the vfl there are threads can you put an fc-etc.. adapter on it
Answer:	To Install: 1. The existing toilet seat and lid can either be removed or flipped up depending on user preference. 2. Turn the knob (marked A) counterclockwise and completely loosen the clamp (marked B) on the front of the elevated seat. This will place the clamp in its longest adjustment. 3. Position the rear wedge (marked C) under the rear rim of the toilet bowl. Note: The elevated seat MUST be inside the toilet bowl. The rear wedge MUST be positioned under the rear lip of the toilet bowl. 4. After the elevated seat is properly placed into the toilet and the clamp is engaged with the front of the bowl, turn the knob clockwise until the seat is securely fastened. DO NOT use tools. Hand-tighten only. DO NOT overtighten knob. Check the seat for proper installation and re-align/re-tighten if necessary.
Question:	do you stock fibre splicing machines
Answer:	yes
Question:	Ordered this unit but cant get the software to work on my windows 10 64 bit pc will it not work with my os? where or who do i call for support
Answer:	Your own seat goes on top after you bolt the unit to your toilet. Very sturdy!
Question:	What is the resolution in length of this otdr and why do you say no launch cable needed
Answer:	It is going to be 4.75 over all with the seat and riser. It is awesome.
Question:	do you have an eta on when it will test feet instead of km
Answer:	I don't think so. My front has never come off went getting up. Your father is using the front to get up. He needs support to get up.
Question:	How do i upload the files form the otdr, i am not seeing the otdr in file explorer
Answer:	This one pictured here does have one bolt going through from your original seat down through the elevated seat and on through to the toilet. However be careful, while the idea is a good one, the one I received had the plastic bolts broken off when it arrived. I sent it back and found one at a medical supply company for less.

Product features

4 in 1 Smart Handy OTDR Tester

This OTDR Fiber Tester is portable fiber fault locator, it is quickly to detect fault location and type of optical fiber using OTDR element and stronger software analysis tool.

OTDR

Type of Fiber: 9/125um Single Mode Optical Fiber

Dead Zone of Reflection Event: 2m

Dead Zone of Attenuation Event: 12m

Optical Power Meter

Measurement Range: -70~+10dBm

Wavelength Range: 800~1650

Visual Fault Locator

Wavelength: 650nm

Mode: 0Hz, 1Hz, 2Hz

Optical Light Source

Connector: FC/PC

Output Power:>=-5dBm

4 in 1 Multi-functional OTDR Fiber Tester

It’s a cost-effective OTDR tester with outstanding performance. It is particularly suitable for engineer construction and maintenance fault location of FTTx and access network

Multiple Interfaces & Adapters

• FC/PC; SC/PC is included in standard packing
• Patch Cord and Adapter are also provided with complimentary for switching between UPC/APC

7.4V/4.4Ah Large Lithium Battery Capacity

7.4V/4.4Ah Lithium Battery supports round 5,000 times of measurements, ensures long working time and suitable for long time field work

Data Simulation Analysis Software

This OTDR Tester is equipped with Data Simulation Analysis Software, to process, generate and print report.

The test report contains information such as test condition, test curves, link loss, average loss, etc. You can save the test report as .sor format file or print in batch.

4-inch Touch Screen

4-inch Touch Screen, 800*480 pixels, clear and readable in outdoor sunlight environment, provides ultimate convenience for you, easy and fast.

User-friendly UI Design

User-friendly UI Design, together with 4-inch Touch Screen, makes your work simple and easy

Soft Carry Case with Strip

Oxford cloth Soft Carry Case with strip provide better protection for the device

Packing List & Kind Reminder

• OTDR Tester with FC/UPC Connector *1
• AC/DC Charger *1
• CD/USB (software and user manual) *1
• User Manual *1
• Test Report *1
• Patch Cord and Adaptor *1
• Soft Carry Case *1

Parameter

· Detector Type: InGaAsOptical;Connector: SC/FC & 2.5mm Universal

· Calibrated Wavelengths: 850,1300,1310,1490,1550,1625nm

· Measurement Range: -50 ~+26 dBm;Accuracy: ±0.2 dB

· Power Measurement Linearity: ±0.1dB; Display Resolution: ±0.01 dB

· VFL Output power: 30mW

· VFL Range 30km/18.6mi

· Power Supply: 3.7V 2000MAH 18650 Li-con battery

· Working time: >200hoursonly OPM Work);≥50Hours(30mW VFL&OPM Work)

· Dimensions: 160x75x10mm; Weight:250G

SC FC ST Adapter

The interface is applicably designed for SC, FC, ST adapter and standard universal 2.5mm adaptors, making it more suitable for FTTH.

Practical, Compact Design and More durable

Pocket size and light weight, Convenient Handy Size(17*8.5*3.1cm/6.7*3.3*1.2inch), easy to use; Rubber Outshell and Sturdy Oxford fabric case, increased the protective properties for field work, Miniature chassis protection design prevents damage caused by accident drop.

3.7V 2000mah 18650 Li-ion Battery

Low battery consumption,2000mah Li-ion Battery provide 50-200 working hours for continuous operation.

Optical Power Meter and 20mW VFL

Six Wavelength and Stable 30mW VFL Output—850nm,1300nm,1310nm,1490nm,1550nm,1625nm and 650nm/30mW@30kM(12mi) Visual Fault Locator (VFL) with SC/FC Adapter. Covering most needs of CATV CCTV Communication Engineering maintenance.

Package Include

1 x Optical Power Meter with 30mW VFL

1 x Oxford Fabric Case

1 x User Manual

1 x 3.7V 2000mah 18650 Li-ion Battery

1 x FC, SC Adapter

1 x AC charger

1 x Micro USB Cable

Quality Control

The hallmark of SPEEDWOLF is quality. All of our commitments,actions and products must be recognized as an expression of quality. Our most important criterion of quality is the satisfaction of our customers.

• 2.5mm universal(FC+SC Connector); 1 Year Warranty
• Wavelength(nm):1310+1550nm SM Light Source
• Measurement Range:-70+10dBm for power meter
• Rubber armor protecion; Anti-proof; Power meter and Light Source Combine
• It offers power autonomy of 55 hours, for reliable, long-lasting performance in the field

User questions & answers

Question:	Is the KLS-35 singlemode output only, or can it output multimode too? How is this better than the KLS
Answer:	Any product you buy on Amazon that you are not satisfied with is returnable.
Question:	Can it test single-mode and multi-mode fiber cable
Answer:	Here are the product specifications; Measures 26 inches x 22 inches x 8.25 inches, 21.5 inches between the handles.
Question:	Does it come with a LC adaptor? If now how can I order one
Answer:	Yes, the size labeled 'Elevated with Arms' is the same seat for STANDARD toilets.
Question:	Does this need to be regularly calibrated or is no calibration needed
Answer:	Thank you for your question. The distance within the handrails is 21.5", the overall dimensions; 26" x 22" x 8.25". If you are of average size then there shouldn't be an issue, however if you are larger or bariatric size you may want to look into a bench style option which then would give you more from front to back and side to side.

Product features

Product Feature:

: 2.5mm universal interface ±0.2 dB accuracy

: Wavelengths 850-1625nm

: 0.01 dB Resolution

: Measurement Range -70~+10dBm

: Manual calibration

: Waterproof keys suitable for various outdoor environments

: Silicone jacket, anti-drop 2m

: Equipped with LED light, not afraid of the dark

Product description

Optical Power Meter – 1 Piece

• Measuring Range: -70~+10dBm
• Calibrated Wavelengths: 850 1300 1310 14901550 1625nm
• Connecting Adapter: 2.5mm Universal &FC/PC
• Power Supply: 3*AAA Battery (battery not included)
• Working Hours: >120 Hours
• Size & Weight: 130*66*27mm / 160g

 

Visual Fault Locator – 1 Piece

• 10mW Bright red laser at 650nm
• Pulsed and CW operation
• Fast located the broken point
• Rugged and weatherproof design
• 2.5mm or 1.25mm universal connector
• 2*AAA Battery (battery not included)
• Color: Blue+Black or Orange+ Black

 

Fiber Cleaver – 1 Piece

• Applicable Fiber: SM, MM, DS, NZ-DS, EDF
• Fiber Diameter: 100 ~ 150um
• Coating Diameter: 100 ~ 1000um
• Typical cleave angle is 90°±0.5°
• Compact & Handy outfit design
• Cleaving blade with 16 cleave spots
• Built-in maintenance tool attached

 

FTTH Drop Cable Stripper – 1 Piece

• Able to cut cable horizontally or vertically
• Exquisite design, strong and durable
• With length positioning
• Easy to operation and carry

 

Fiber Optic Stripper – 1 Piece

• 140 µm diameter hole and V opening in blade allows removal of 250 micron buffer coating from 125 micron fiber
• Second hold for stripping 2-3 mm fiber jackets
• Pre-set at the factory—no adjustments needed
• Comfort-grip, ergonomic handles

 

Fiber Optic Length Fixer – 1 Piece 

Alcohol Bottle – 1 Piece

Carry Bag – 1 Piece

• What’s Inside the Kit – Optical Power Meter (-70~+10 dBm, 6 wavelength), Visual Fault Locator (10mW), Fiber Cleaver with 90° cleaving angel, FTTH Drop Cable Stripper, Fiber Optic Stripper, Fiber Optic Length Fixer, Alcohol Bottle and water-proof Carry Bag
• Why Do You Need This Kit -- Fiber Optic FTTH tool kit is a simple and convenient integration solution for fiber-to-the-home quick-connect construction, such as stripping, fiber cutting, cleaning and testing
• Superior Quality and Cost-Effective Products – The OPM has high measurement accuracy and display resolution, Backlight Display, low power consumption, continuous work more than 120 hours; The Fiber Cleaver Blade has 16 cleaving spots and can work for various types of fibers
• This is a Practical and Useful FTTH Tool Kit -- We carefully select and group those fiber optic cold-connect construction products which are essentials into this tool kit for your FTTx solution and FTTX FTTH quick connection
• Light Weight and Portable -- Grouped in a compact carry bag, those fiber optic FTTH essentials are small in size and light in weight. The tool kit is an ideal kit for technicians

Product description

A reliable fiber optic power equipment is quite important in the of high bandwidth. This hand held optic meter could help to inspect cables capabilities, calculate relative power loss, locate the fault and troubleshooting.

We dedicate to providing customers with practical fiber tools, which means that you have an affordable choice for the functional and constructive optic meter.



Specifications:

Calibrated Wavelength (nm): 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm

Detector: InGaAs

Measurement Range (dBm): -70 - +3

Input: DC 9V/1000mA

Resolution (dB): Linear 0.1% / Non-linear 0.01dBm

Connector: SC, FC, ST/ Universal 2.5mm Adaptor

Opting Tempture(C): -10 - +60

Storage Tempture(C): -25 - +70

Relative Humidity: 90% (+30C)

Working Hours: >48 hours

Size: 190mmx100mmx48mm/7.48inx3.94inx1.89in



Package Content:

1 x Optical Power Meter

1 x Oxford Fabric Case

1 x User Manual

3 x AA Battery

1 x ST, FC, SC Connector

 

• Quick and Accurate. No waiting for preheating, just plug and play. +/- 5%uncertainty, -70 to +3 dBm measurement, relative power calculation, calibration function.
• Durable. Sensitive chip and sturdy inner structure. Low battery consumption, 48 working hours for continuous operation.(3 x AA batteries included)
• Clear Blue Screen. Detail means profession, a distinct result or information display ensures the satisfaction of user experience.
• 6 Wavelength and Light Source. 850/1300/1310/1490/1550/1625 nm+5KM red light locator+SC/FC/ST Adapter. Covering most needs of CATV CCTV Communication Engineering maintenance.
• Convenient Handy Size. 7.5x4x1.9 inches, 0.9 LB weight, Sturdy Oxford fabric case. Your trustful easy-carry fiber tester.

User questions & answers

Question:	Can this be used to test the output power of a transmitting device to see if its working
Answer:	We weren't able to find the information you've asked about. You should try contacting Maddak the MFG for more details. They can be reached at 1-800-443-4926.
Question:	Work for single and multi modal fiber data networks
Answer:	Thank you for your question. There are several MFG that have a 2" Raised Toilet Seat available. We found a few choices by using key words; '2" raised toilet' in the search field.
Question:	what is the frequency detecting ID for power meter
Answer:	Thank you for your question. Typically any of the toilet risers would work in combination with a safety rail as long as it doesn't have to attach to the back of the bowl. The styles that sit on the bowl with no attachment feature, or secure to the front of the bowl would work for you.
Question:	Does the red light transmit at the 6 wavelengths as specified? I need to use the meter to send the light at 1310 nm for testing fiber patch cables
Answer:	This unit simply fits on top of the bowl. You would lift the existing seat and lid out of the way and set the unit down on the bowl. No tools or assembly needed. It works with standard and elongated toilets.

Product description

Size:5dB

The optical attenuators mainly used in fiber optic to debug optical power performance & optical instrument calibration correction & fiber signal attenuation to ensure the optical power in a stable and desired level in the link without any changes on its original transmission wave.

Application:

The optical attenuator is widely used in fiber optic communication systems, fiber optic CATV, high power optical device measurement.

Parameters:

Fiber Connector: LC/UPC

Mold type:Single Mode

Attenuator db:5dB 

Attenuation Tolerance: ±0.5dB 

Return Loss :≥55dB

Polarization Dependent Loss:≤0.2dB 

Core material: Ceramic

Using dustproof cap to protect the end-face

Operating Temp Range -40~80°C

Storage Temp Range -40~85°C

• 📡As a optical passive devices, FLYPRO Fiber attenuators mainly used in fiber optic to debug optical power performance & optical instrument calibration correction & fiber signal attenuation to ensure the optical power in a stable and desired level in the link without any changes on its original transmission wave
• 📡LC/UPC singlemode fixed fiber optic attenuator 10dB,Polarization dependent loss ≤0.2dB and return loss ≥50dB
• 📡The fiber attenuator test system features high attenuation accuracy, low added loss and good stability
• 📡Applications: fiber optic communication systems, fiber optic CATV, high power optical device measurement
• 📡Used for attenuation of input optical power, avoiding distortion caused by optical receiver due to excessive input optical power