Active Fiber Live Fiber OTDR for Online Testing 1550nm Touch Screen Event Map Ethernet Cable Tester Equipment SM


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MAY420 Live Fiber OTDR for Online Testing is with filter for both sides of 1550nm. It can filter wavelength 1490nm and below, and 1577nm and above.It can be used for Live fiber and Online Testing, for Telecom as Telecom uses 1310/1490nm, but it cannot work for the active fiber with 1550nm wavelength used for CATV and video.


  • Support screen capature
  • Integrated design, smart and rugged
  • FC/SC connectors interchangeable
  • Automatic and manual test function
  • OTDR Viewer software for data analysis
  • Cover plate type tempered glass panel, no worry about screen scratch
  • Sink type optical port design for better protection
  • Support U disk, SD card and Micro USB export data protection


  • Access network testing
  • LAN network testing
  • Laband Factory testing
  • Live fiber troubleshooting
  • FTTA troubleshooting

2. Optical Power Meter (OPM)
3. Visual Fault Locator (VFL)
Visual Fault Locator uses red laser of 650nm to locate broken fiber point and test fiber continuity.
4. Optical Light Source (Laser Source)
5. Network Cable Test
It can check RJ45 Ethernet Cable Sequence
6. Fiber Inspection
Fiber Inspection is used to check fiber optic connector endface. The inspection probe is sold seperately.
7. Event Map
Event Map is similar to EXFO’s iOLM function, which can display events in user-friendly icons.
8. Loss Testing
OPM and OLS can be opened at the same time to test insertion loss.
9. Report Print
PC software helps print out OTDR test reports.
10. LED light


Model MAY420-S20F MAY420-S22F
Wavelength 1550nm with filter 1550nm with filter
Dynamic Range① 20dB 22dB
Fiber Type SMF
Event Dead Zone② 1.2m
Attenuation Dead Zone 5.5m
Measurement Range 100m, 500m, 2km, 5km, 10km, 20km, 40km, 60km, 100km
Measurement Pulse Width 5ns, 10ns, 20ns, 50ns, 100ns, 200ns, 500ns, 1us, 2us, 5us, 10us
Ranging Accuracy ±(0.5+Range×3×10-5+sampling resolution) (Excluding refractive index error)
Sampling Resolution Minimum 0.2m
Samping Points 64,000 points
Linearity ≤0.05dB/dB
Loss Threshold 0.01dB
Loss Resolution 0.001dB
Range resolution 0.01m
Refracton Setting 1.2000~1.5999, 0.0001 step
File Format SOR standard file format
Laser Safety Level Class II
Adapter FC (Interchangeable SC adapter)
Language English, Spanish, Russian, French, Portuguese, Korean, Italian, Vietnamese

①Testing temperature is 25°C±2°C, maximum pulse width, average time is more than 3 minutes.
②Test conditions of Event Dead Zone are minimum range, minimum pulse width, reflection loss of optical fiber end surface (>45dB), typical value.

2. Optical Power Meter

Wavelength Range (±20nm) 800~1700nm
Calibrated Wavelength 850/1300/1310/1490/1550/1625/1650nm
Test Range -70~+10dBm
Resolution 0.01dB
Uncertainty ±5%
Connector Universal 2.5mm (FC/SC/ST)

3. Optical Light Source

Emitter Type FP-LD
Working Wavelength 1550nm±20nm
Output Power ≥-5dBm
Modulation Frequency CW/270/1k/2kHz
Accuracy CW, ±0.5dB/15min (Test after 15 minutes of preheating)
Connector FC (Interchangeable SC adapter)

3.1. The wavelength of Optical Light Source is the same as OTDR wavelength.
3.2. Optical Light Source shares the same fiber port as OTDR port.

4. Visual Fault Locator

Wavelength (±20nm) 650nm
Power ≥10mW
Mode CW/2Hz
Connector Universal 2.5mm (FC/SC/ST)

5. RJ45 Sequene

Test Range 300m

Other Specification:

Display 4.3 inch full-view capacitive touch screen, support multi-touch, TFT 800×480 resolution
CPU Frequency 1GHz
Power Supply AC/DC adapter: AC: 100~240V, 50/60Hz, 9V, 2A; Lithium battery: 3.7V 5,200mAh
Battery Standby Life ≥10h
Battery Working Hours ≥8h (backlight off)
Battery Charging Time 3 hours with power adapter; 10 hours with USB cable
Data Interface 2×USB (Type A×1, Micro USB×1), SD card
Data Storage 100,000 curves; 1G DDR and 8G memory card
Weight 560g (including battery)
Size 175*105*45mm
Operating Temperature -10 ~ +55°C
Storage Temperature -20 ~ +80°C
Relative Humidity < 95% Non-condensation

Standard Accessories:

Item Name Quantity
1 OTDR with FC adapter for OTDR/LS port, Lithium battery and Simulation analysis software 1pc
2 AC/DC power adapter 1pc
3 Data line 1pc
4 SC Adapter for OTDR port 1pc
5 User manual 1pc
6 Calibration Certificate 1pc
7 Soft Bag with shoulder strap 1pc
8 Remote module for Network Cable Test 1pc
9 Wrist belt 1pc

Ordering Information:

Model MAY420
Wavelength and Dynamic Range S20F: 1550nm with filter, 20dB
S22F: 1550nm with filter, 22dB
Connector None: FC/UPC and SC/UPC (default)
Weight 1.5 kg
Dimensions 30 × 22 × 8 cm
Dynamic Range & OTDR Port:

20dB UPC, 20dB APC, 22dB UPC, 22dB APC


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