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Verification.book Page 61 Monday, January 19, 2004 1:40 PM
Verification Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
24 Disable the optical attenuator then disconnect the Optical
signal from the OmniBER OTN Optical IN port and connect
to the power meter. Re-enable the optical attenuator.
25 Check the power meter reading is between:
–8.5 dBm and –5.5 dBm
26 Test Complete. Set Laser to OFF before disconnecting Set-up.
Checking the Receiver Minimum Sensitivity Margin Against
Laser Transmitter Extinction Ratio (ER).
The Transmitter Lasers used in the tests have extinction ratio
significantly better than the minimum (ER) specification. The
table below gives correction factors for a range (ER) values to
check the additional receiver sensitivity measured in tests.
Using the extinction ratio results from the Optical Pulse Mask
and Output Characteristics tests for the laser used confirm the
typical 'additional' margin measured in sensitivity tests exceed
values in table.
Extinction Ratio measured in Optical Pulse Mask
and Output Characteristics Test
> 8.2 dB to 9 dB
> 9 dB to 10 dB
> 10 dB to 12 dB
> 12 dB to 15 dB
> 15 dB to 20 dB
1
Performance Tests
Additional Sensitivity
>0.4 dB
>0.6 dB
>0.93 dB
>1.05 dB
>1.2 dB
61
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