Fluke DSP-FTA440 Gigabit Multimode
Networks running Gigabit Ethernet over multimode fiber
commonly use a new type of light source called a Vertical Cavity Surface
Emitting Laser (VCSEL). VCSELs are more cost-effective than conventional lasers
and it provide greater bandwidth than LED light sources.
The proper way to accurately test a fiber network using a
VCSEL is with a tester that uses a VCSEL. Meet the DSP-FTA440 the world's
first VCSEL-based Fiber Test Adapter.
Combining the DSP-FTA440S with
a DSP-4000 DSP-4100 or DSP-4300 provides automatic, dual-fiber loss
testing and certification by using a VCSEL laser at
850 nm and a Fabry-Perot (FP) laser at 1310 nm wavelengths. It also measures the
length of fiber links and certifies the results against the Gigabit Ethernet
In addition, the DSP-FTA440S allows bi-directional
testing on both fibers under test and saves results for both directions in the
same record. Utilizing Fluke Networks' comprehensive CableManager Software
you can easily save all fiber link data electronically for results management
and report generation.
Why do I need the DSP-FTA440S Gigabit Multimode
Fiber Test Adapter if I already have an LED multimode
- Networks running Gigabit Ethernet over multimode
fiber, use a light source called a Vertical Cavity Surface Emitting Laser
(VCSEL) for data transmission at 850 nm. More cost-effective than the
traditional laser, a VCSEL provides greater bandwidth than possible with LED
With a VCSEL source, the light energy is concentrated in
the center of the fiber, whereas an LED source fills the entire fiber with light
energy. The farther the light energy is away from the center of the fiber, the
more likely it is to escape the fiber and show up as power
Therefore, when LED testers are used to test gigabit
multimode fibers, they tend to show more power loss than is actually present in
a network using a VCSEL transmission source.
With the very tight loss budgets for Gigabit Ethernet,
you could actually get a FAIL reading with an LED test, when the link is really
working. This could result in time wasted trying to fix a problem that doesn't
When you test with the VCSEL-based DSP-FTA440S, you can
be sure that you will see the actual loss that is present in the
Can I test either 62.5 m m or 50.0 m m fiber with the
Gigabit Multimode Fiber Test Adapter?
- Yes. The DSP-FTA440S Fiber Test adapter contains a
50.0 m m internal launch fiber, so it is perfect for testing 50.0 m m fiber.
And it works just as well for 62.5 m m fiber because the light is being
launched from a smaller fiber (50.0 m m) into a larger fiber (62.5 m m),
capturing all of the light energy. This is true for both 850 nm and 1300 nm
Does it matter what core size or type of patch
cord I use?
- Yes. The patch cord should always match the
core size and type of the fiber under test. A mismatched patch cord may cause
inaccurate loss measurements at the mismatched fiber-to-fiber
Fast and easy testing. Automatic
Testing and certifying all types of optical networks has
never been easier with the DSP Series Cable Testers and our family of Fiber Test
Fluke Networks' DSP Fiber Test
- Test two fibers and two wavelengths at one
- Utilize Fluke Networks' comprehensive CableManager¿
Software for results management and report generation.
- Allow bi-directional testing on both fibers under test
and save results for both directions in the same record.
- Automatically measure length, propagation delay and
- Include a built-in TALK feature that allows you to
communication with a person or the other end of the fiber.
- Have a FindFiber feature that provides a quick check
for users at both ends to locate a signal from the other end.
- Keep track of the maximum and minimum power throughput
of the test with the Monitor feature.
- Efficiently and accurately test fiber links with any
of the four major SFF connectors.
- Are built rugged to withstand the drops and other
mishaps that occur in today's network installation environments.
Power supply: ±6 V supplied by the DSP-4000 test
Temperature range: Operating: 0 ºC to +40 ºC; Storage: -10 ºC to +60
Warm-up time: 5 minutes
Humidity range: Operating: 0 % to 75 % RH,
Storage: 0 % to 95 % RH, non-condensing
Dimensions: 3.3” x
4.6” x 1.9” (8.3 cm x 11.6 cm x 4.7 cm)
Weight: 7.6 oz (215
FTA420 - Multimode LED
FTA430 - Singlemode
FTA440 - 850 nm Vertical Cavity Surface Emitting Laser (VCSEL);
nm FP laser
FTA420 - 850 nm and 1300 nm
FTA430 - 1310 nm
and 1550 nm
FTA 440 - 850nm and 1310 nm
FTA420 -20 dBm
(10 mW), typical (into 62.5/125 mm fiber)
FTA430 and FTA440 -10 dBm
output stability (8 hours): ±0.25 dB at 23 °C
Power measurement accuracy: ±0.25 dBm at 23 °C, 45 % RH to
75 % RH, -20
dBm for 850 nm and 1300 nm, -10 dBm for 1550 and 1625
Connector: SC, multimode or singlemode
Calibrated wavelengths: 850 nm, 1300 nm, 1310 nm, 1550 and 1625
Power measurement range: +3 dBm to -50 dBm
linearity: ±0.25 dB at 23 °C
Measured in Loopback Mode
FTA420 - 5000 meters of 62.5 um multimode cable
FTA430 - 10000 meters of
FTA440 - 5000 meters of 50.0 um multimode cable
measurement accuracy: ±1.5 m plus 2 % of length