Siecor 5000 Series - Accuracy of the Attenuation Display; Technical Specifications

M90 Fusion Splicer 5-8 Operating Instructions
Attenuation Splice Issue 02/97
Accuracy of the Attenuation Display
The displayed attenuation is referred to a wavelength of 1300 nm and can deviate for
instrumentational reasons from the actual value, as is shown in the
Technical Specifi-
cations.
When using external test instruments to check the attenuation values obtained,
e.g.
OTDR,
it should be noted that at relatively high attenuation values extreme measur-
ing inaccuracies may occur. To ensure accurate measurements, the measuring instru-
ment must be calibrated first over the range of the attenuation being measured.
Technical Specifications
This section relates only to the
Attenuation Splices
program. All measured values are
based on a wavelength of 1300 nm and apply to
identical standard single-mode fi-
bers.
For
dispersion-shifted single-mode fibers
refer to the notes in section "Fiber
Types that can be Used" in this section. These also apply for other
special fiber types
.
The values in the table shown in
italics are examples for a required value of 3 dB.
Min. Type Max.
Attenuation selectable in 0.1-dB
steps
0 dB - 10 dB
Deviation
actual value - required value
e.g.
for required attenuation=3 dB
- 1 % - 0.1 dB
- 0.13 dB
+ 3 %
+ 0.09 dB
+ 7 % + 0.1 dB
+ 0.31 dB
Deviation actual value-display
value (measuring accuracy)
e.g. for required attenuation=3 dB
- 0.05 dB
- 0.05 dB
+ 3 %
+ 0.09 dB
+ 6% + 0.05 dB
+ 0.23 dB
Temperature stability of attenua-
tion in range -40°C to +85°C
(with suitable splice protection)
e.g. for required attenuation=3 dB
- 2 %
- 0.06 dB
0 %
0 dB
+ 2 %
+ 0.06 dB
Return loss 60 dB > 65 dB -
All percentages in the table are based on the required value in dB.
It follows from the table that the actual attenuations obtained are, on average, 3 %
above the required value and the display value. This deviation results from the measur-
ing method used and depends on the fiber type employed. You can reduce the differ-
ence between the actual value and required value if necessary by entering a lower re-
quired value.
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