The Anritsu MW9076 series is a small and lightweight optical time domain
reflectometer (mini-OTDR) for measuring loss and locating faults in optical
fiber cables at fiber installation and maintenance. It has excellent basic
performance specifications including a dynamic range of 45 dB and a
world-beating backscatter dead zone of just 8 m. For the best price performance,
the series includes four types of main frame, two types of optical channel
selector unit and two types of display unit.
Features
8 m short dead zone
Simple measurement of chromatic dispersion from one end of optical fiber
Measurement in 10 s (Full-Auto mode), 0.15 s real-time sweep
High dynamic range When using a wavelength of 1.55 µm,
a point about 190 km distant can be measured.
Short dead zone Clearly measure up to near end by 8 m
dead zone (back-scatter, SM unit)
Chromatic dispersion measurement The MW9076D has a
built-in function for measuring chromatic dispersion even outdoors. The
chromatic dispersion can be measured automatically over a wide range from 1300
to 1660 nm from one end of the fiber. The dispersion reproducibility is ±0.05
ps/(nm · km)* and the dynamic range is 30 dB. The MW9076D can be operated from
an external PC using remote commands to measure the chromatic dispersion. For
detail of the chromatic dispersion measurement, refer to the document of
“product introduction MW9076 series Optical Time Domain Reflectometer”. *:
Measured with 25 km of 1.3 µm zero-dispersion fiber (ITU-T G.652) at 1550 nm.
Fresnel reflection The far-end Fresnel reflection can
be measured for four wavelengths (1310/1450/1550/1625 nm).
Group delay characteristics The fitting formula
supports cubic or quintic Sellmeier, and polynomials can be applied to various
types of fibers.
Chromatic dispersion characteristics The zero and
total dispersion can be displayed along with the delay, dispersion and
dispersion slope at 0.1 nm steps.
High-speed measurement It takes only 10 seconds to
measure and display the waveform and connection loss on one screen. Just one
press of the Start key is all that is needed to make measurement.
Full automatic mode Measurement results are displayed
by simply pressing the Start key. All complicated settings of distance range,
pulse width, attenuator, and maker can be automatically executed. Measurement
speed in this mode was significantly increased. When the wavelengths are set
to ALL, wavelengths are automatically changed.
Repeated measurement A series of operations, such as
measurement, wavelength switching, data saving, optical channel switching, and
next optical fiber measurement, can be executed automatically under preset
measurement conditions. This mode is ideal for measuring a multi-core optical
fiber.
Waveform comparison function Measured and saved data
can be compared on the same screen. In addition, differences can be displayed
as a waveform for simple observation of distance and level differences. This
is useful for checking aging changes or comparing several fibers.
Warning level setup function In automatic measurement
mode, an event warning value can also be set in addition to a detection
threshold value. For example, the threshold value can be set to the acceptance
level, and warning value to a pass/rejection decision level. In this case, all
events will be detected, and those exceeding the warning value are displayed
in another color, therefore, enabling the operator to easily identify possible
“borderline” events.
Communication light check function When measuring a
fiber in service, there is a possibility of mis-measurement by an OTDR. To
guard against the risk of mis-measurement, this check function checks for the
presence of light other than the OTDR optical measurement pulse.
Visible LD A 635 nm visible LD option is available for
the detection of breaks and loss points along the fiber to be measured.
VGA output terminal The VGA connector outputs the
screen interface to a CRT monitor, which is very useful for production-line
applications.
Large internal memory About 18 MB internal memory is
provided as standard. The following table shows the number of waveforms which
can be saved in each media.
34.5 dB (1.31 µm) 33.5 dB (1.41
µm) 32.5 dB (1.55 µm) 30.0 dB (1.625 µm)
Dead zone(back-scattered light)
=25 m
Dead zone (Fresnel reflection)
=3 m
Marker resolution
0.05 to 800 m
Sampling resolution
0.05 to 80 m
Sampling points
Quick mode: 5001, 6251 Normal mode: 20001, 25001 High mode:
40001, 50001
Y-axis scale
0.25, 0.5, 1, 2.5, 5, 10, 15 dB/div
(15 dB/div is indicated only at Auto and Full Auto measurement.)
IOR settings
1.400000 to 1.699999 (0.000001
steps)
Distance measurement accuracy
0.1 m ±3 x measurement distance x 10–5
±marker resolution (excluding uncertainty caused by fiber IOR)
Loss measurement accuracy
±0.05 dB/dB or ±0.1 dB (whichever is
greater)
Return loss measurement accuracy
±2 dB
Automatic measurement
Measurement items: Total loss,
total return loss. Each event distance, connection loss, return loss, or
reflection amount (displays in table format) Threshold
values Connection loss: 0.01 to 9.99 dB (in 0.01 dB steps), Return
loss: 20 to 60 dB (in 0.1 dB steps), Fiber-end: 1 to 99 dB (in 1 dB
steps) Warning values Splice connection loss: 0.1 to 10 dB (in 0.01
dB steps), Connector connection loss: 0.1 to 10 dB (in 0.01 dB
steps), Return loss: 10 to 50 dB (in 0.1 dB steps), Fiber loss: 0.01 to
10 dB (in 0.01 dB steps), Total loss: 0.1 to 60 dB (in 0.1 dB steps),
Total return loss: 10 to 50 dB (in 0.1 dB steps), Average loss: 0.01 to
10 dB (in 0.01 dB steps) Number of detected events: Up to
99 Automatic setting: Distance range, pulse width, averaging count
(time) Measurement time: =60 s (in full automatic measurement
mode) Connection check: Automatic check of front panel connector
connection quality Communication light check: Check for presence of
communication light in optical fiber to be measured
Manual measurement
Measurement items: Transmission
loss and distance between 2 points, loss per unit length between 2 points,
connection loss, return loss/reflection amount, total return loss,
average loss Real-time sweep: 0.1 to 0.2 second or less
Waveform storage [Bellcore. SOR
(GR-196-CORE, SR-4731) or Anritsu. Dat format, user selectable], waveform
comparing function, print output (Centronics), repeated measurement
function (A series of operations such as wavelength switching, waveform
storage, and printing can be executed by pressing a single key.), relative
distance set (zero cursor set), calendar clock, distance unit set (km, m,
kf, f, mi), title input (up to 32 characters), remaining battery power
display
Laser safety specification
21CFR Class 1, IEC 60825-1 Class
1
Power
=35 W max. (at charging), 4 W (in
standard state, MU250000A power consumption included.)
Battery
Continuous operation: 6 h (typical
value)
Dimensions and mass
290 (W) × 194 (H) × 77 (D)
mm (MW9076D main frame) 290 (W) × 194 (H) × 122 (D) mm (with
MU250000A Display Unit) =3.1 kg (MW9076D main frame only), =5.7 kg
(with MU250000A Display Unit and battery pack included)
Environmental condition
Operating temperature and humidity:
–10° to 40°C, = 85% (no condensation) Storage temperature and humidity:
–20° to 60°C, = 85% Vibration: Conforming to MIL-T-28800E Class
3 Shock: 76 cm height, 6 surfaces, 8 corners Dust-proofing:
MIL-T-28800E Drip-proofing: MIL-T-28800E
EMC
EN61326: 1997/A2: 2001 (Class
A) EN61000-3-2: 2000 (Class A) EN61326: 1997/A2: 2001 (Annex
A)
