ATO-A1S Series Superior Compact OTDR

  1. 4.3-inch HD touch screen
  2. Measure distance as short as 2 meters
  3. Event Dead Zone: 1.2m; Attenuation Dead Zone: 5m
  4. 1 m resolution for accurate mapping of event
  5. Support multi-result analysis
  • multi-trace comparing
  • fiber attenuation by least square method
  • fiber attenuation by two point method
  • results corresponding to segments
  • interface screen shot for any display
  1. Cover full range of user interface

General Specification
Display 4.3 inch HD (touch screen)
Battery 3.7 V/4000mAh X 1 lithium battery

Continuously test: > 8 hours (back light off)

Charging time: 3 hours with adapter; 10 hours with USB

Data Storage 20,000 groups of curves
Interface USB Type C×1, 8GB SanDisk
Working Temp -10℃~+50℃
Storage Temp -20℃~+70℃
Humidity ≤95% (non-condensation)
Accessories Main unit, 12V power adapter, Lithium battery, FC adapter, USB cord, User guide, RJ45 Cable Tracker, carrying case, wrist belt
Dimension 6.85× 3.62×1.77 inches/ 0.88 pounds (battery included)

174×92×45 mm/ 0.4kg (battery included)

Test parameter


Dynamic Range

Model Dynamic Range and Wavelength Event Dead Zone Attenuation

Dead Zone

ATO-A1S-D28 28/26 dB @1310/1550nm 1.2 5
ATO-A1S-D30 30/28 dB @1310/1550nm 1.2 5
ATO-A1S-D32 32/30 dB @1310/1550nm 1.2 5
ATO-A1S-TU28 28/26/26 dB @1310/1490/1550nm 1.2 5
ATO-A1S-P26 26 dB @1625nm 1.2 5
ATO-A1S-P28 28 dB @1625nm 1.2 5
ATO-A1S-P32 32 dB @1625nm 1.2 5
ATO-A1S-C26 26 dB @1650nm 1.2 5
ATO-A1S-C28 28 dB @1650nm 1.2 5
ATO-A1S-C32 32 dB @1650nm 1.2 5
ATO-A1S-M24 22/24 dB @850/1300nm 1.5 6
Sampling Resolution Minimum 0.05 m
Sampling Point Maximum 256,000 points
Linearity ≤0.05dB/dB
Loss Threshold 0.2dB
Loss Resolution 0.001dB
Distance Resolution 0.01m
Distance Accuracy ±(1m+measuring distance×5×10-5+sampling resolution)

(excluding IOR uncertainty)

Refraction Setting 1.2000~2.0000, 0.0001 step
List of Function
3, Expert OTDR Event Map
5, OPM 6, OLS
7, RJ45 Track 8, RJ45 Sequence
9, RJ45 Length 10, Laser Range

(Distance Measurement)

11, System
Modules Parameter Note
VFL Module Optional between 1-20mW Default: 10mW
OPM Module Type A:+10dBm~-70dBm; Type A as default choice
Type B:+26dBm~-50dBm
LS Module Output:-5dBm±2dB Multi-mode LS Module is only available for ATO-A1S-M24
Output Mode:CW/270Hz/1KHz/2KHz
RJ45 Cable Tracker Digital tracking


Distance Measurement 0.05~40m



①Dynamic range is measured with maximum pulse width, averaging time is 3 minutes, SNR=1; The level difference between the RMS noise level and the level where near end back-scattering occurs.


②Event dead zone is measured with pulse width of 3ns; attenuation dead zone is measured with pulse width of 5ns.