Equipment information
Wandel & Goltermann OLA-25 Accessories
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Model:
OLA-25
Date:
1991
Category:
Group:
Description:
Optical Attenuator
Information
The OLA-25 is a continuously variable optical attenuator
designed for attenuating optical signals carried by
single-mode fibers (9/125 /im) operating at 1300 and 1550 nm.
The attenuator module is a neutral density Filter placed in
the broadened light beam between the input and output
connections. The attenuation value is variable between 3 and
60 dB and depends on the position of the filter, which is
set using the rotary control on the front panel.
The actual attenuation includes the tosses of both test
ports. It is displayed with a resolution of 0.1 dB on the LC
display. The display error remains at < ± 0.2 dB. This
accuracy is obtained by individual calibration of the
display to match the attenuation Filter characteristic. The
OLA-25 is factory calibrated at 1300 and 1550 nm. it is set
to the corresponding nominal wavelength using the slide switch.
The OLA-25 is looped into the test circuit using test
adapters, available for ai! standard 2.5 mm connector
systems (DIN, FC, ST, etc.). Adapter cables can be used if
different connectors are required.
The test ports are physical contact (PC) types. This,
together with the anti-reflex coated components in the
attenuator module, guarantees a constant high return loss of
> 23 dB.
In normal operation the display of the OLA-25 is
battery-powered.
If the attenuation can be read directly from a bit error
tester or optical power Level Meter in the test circuit, the
display can be switched off, as the OLA-25 still functions
as an attenuator in this mode.
Manual Type:
User Manual
Pages:
51
Size:
655.60 Kbytes (671334 Bytes)
Language:
english
Revision:
50/91.07
Manual-ID:
BN 2200/00.82
Date:
1991 01 01
Quality:
Scanned document, all readable.
Upload date:
2017 01 22
MD5:
e15c036b0944b4677877d415cc4d98b9
Downloads:
412
Information
1 Specifications ... 1-1
1.1 Wavelength ... 1-1
1.2 Attenuation ... 1-1
1.3 Error limits ... 1-2
1.4 Test ports ... 1-3
1.5 Display ... 1 -3
1.6 General specifications ... 1 -4
1.7 Ordering information ... 1-5
2 General information - preparing for use ..2-1
2.1 Test ports ... 2-2
2.1.1 Fitting the test adapters ... 2-2
2.1.2 Cleaning the test ports ... 2-4
2.1.3 Connector life ... 2-8
2.2 Power supply ... 2-9
2.2.1 Battery operation ... 2-9
2.2.2 AC line operation and battery recharging with the
LNT-1 ... 2-12
2.3 EMI/RFI suppression ... 2-14
3 Operation ... 3-3
3.1 Overview ... 3-3
3.2 Instrument settings ... 3-6
3.2.1 Switching on, auto-off
and permanent operation ... 3-6
3.2.2 Setting the wavelength
and attenuation values ... 3-7
3.2.2.1 Setting the wavelength ... 3-7
3.2.2.2 Setting the attenuation ... 3-8
3.3 Looping the OLA-25 into
a test circuit ... 3-10
3.3.2 Connection using test adapters
(2.5 mm connectors) ... 3-12
3.3.3 Connection using W&G
K31XX adapter cables ... 3-14
3.3.4 Test example ... 3-16
4 Further information ... 4-1
4.1 Displayed optical attenuation ... 4-1
4.2 Return loss ... 4-4
4.3 Light attenuation at noncalibrated wavelengths
... 4-7